Multi Scale Investigations Of Carboxymethyl Cellulose Coated Nanoscale Zero Valent Iron Particle Transport In Porous Media

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Multi-scale Investigations of Carboxymethyl Cellulose- Coated Nanoscale Zero Valent Iron Particle Transport in Porous Media

Author : Jing Li
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (911 download)

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Book Synopsis Multi-scale Investigations of Carboxymethyl Cellulose- Coated Nanoscale Zero Valent Iron Particle Transport in Porous Media by : Jing Li

Download or read book Multi-scale Investigations of Carboxymethyl Cellulose- Coated Nanoscale Zero Valent Iron Particle Transport in Porous Media written by Jing Li and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Subsurface injection of nano scale zero valent iron (NZVI) particles is an emerging technology for in situ remediation of the sites contaminated by toxic contaminants such as chlorinated organic dense non aqueous phase liquids (DNAPLs) and heavy metals. One of the key challenges in applying NZVI particles for remediation at the field scale is that NZVI particles are not readily transported in subsurface porous media. The overall objective of this research is to address this challenge by conducting a number of column experiments and 2-D pilot scale tank experiments as well as by exploring the deposition mechanics of metal nanoparticles theoretically. Although numerous studies have focused the stability and transport of polymer/polyelectrolyte coated NZVI particles, the comparison of the effect of the same type of polyelectrolyte stabilizer with different molecular weight on the stability and transport of the corresponding coated NZVI particles has not been systematically conducted to date. Varying molecular weights of homologous polyelectrolytes can cause changes in viscosity and rheology in free solution, and alter the extent of colloidal stability when coated on the nanoparticles. Furthermore, most of the studies on NZVI particle transport have been conducted in the vertically placed columns, which are not representative with the actual flow orientation in field, leading to a potential difference of transport performance of NZVI particles between the commonly used vertical flow orientation and the horizontal flow model. In addition, the scale-up effects (from laboratory-scale column to pilot-scale or field-scale demonstrations) on NZVI transport are reported. In this study, a thorough investigation on NZVI transport is conducted in a 2-D pilot-scale tank to shed some light on the transport performance of NZVI particles under conditions that are more close to actual circumstances. Finally, to calculate the deposition rate coefficient of metal nanoparticles during transport, a considerable number of studies on NZVI particles transport employed equations for predicting the single collector contact efficiency that are developed on the basis of the numerical calculations for common colloidal particles such as latex particles, which have smaller densities than those of metal particles. Taking the horizontal flow mode and the density effects for metal nanoparticles into consideration, a new methodology is developed in three dimensions (3-D) to more precisely predict the single collector efficiency of NZVI particles.In the first study, the influence of the molecular weight of the polyelectrolyte grafted on NZVI particle on its stability and transport was investigated. Three carboxymethyl celluloses (CMC) with different molecular weights (90,000 Da, 250,000 Da and 700,000 Da) were used to stabilize NZVI particles. The comparison of the results revealed that the stability and transport of NZVI particles were improved significantly by CMC with high molecular weight, due to its high viscosity property. In the second study, the effects of gravity on NZVI particle during its transport were extensively assessed in vertical and horizontal placed columns under different conditions (mean sand diameters and NZVI concentrations). The results indicated that the gravity forces significantly reduced NZVI particles transport in coarse sand and at high NZVI concentration in horizontally placed columns. To thoroughly study the impact of horizontal orientation flow on the transport of NZVI particles at a larger scale, a series of transport experiments were conducted in a pilot-scale 2-D tank. Furthermore, to address the challenges met in predicting the single collector efficiency in horizontal orientation flow mode, a methodology based on trajectory analysis of particles around a Happel sphere-in-cell model for porous media in 3-D was developed. " --

Nanoscale Zerovalent Iron Particles for Environmental Restoration

Author : Tanapon Phenrat
Publisher : Springer
ISBN 13 : 3319953400
Total Pages : 611 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Nanoscale Zerovalent Iron Particles for Environmental Restoration by : Tanapon Phenrat

Download or read book Nanoscale Zerovalent Iron Particles for Environmental Restoration written by Tanapon Phenrat and published by Springer. This book was released on 2019-01-31 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first complete edited volume devoted to providing comprehensive and state-of-the art descriptions of science principles and pilot- and field-scaled engineering applications of nanoscale zerovalent iron particles (NZVI) for soil and groundwater remediation. Although several books on environmental nanotechnology contain chapters of NZVI for environmental remediation (Wiesner and Bottero (2007); Geiger and Carvalho-Knighton (2009); Diallo et al. (2009); Ram et al. (2011)), none of them include a comprehensive treatment of the fundamental and applied aspects of NZVI applications. Most devote a chapter or two discussing a contemporary aspect of NZVI. In addition, environmental nanotechnology has a broad audience including environmental engineers and scientists, geochemists, material scientists, physicists, chemists, biologists, ecologists and toxicologists. None of the current books contain enough background material for such multidisciplinary readers, making it difficult for a graduate student or even an experienced researcher or environmental remediation practitioner new to nanotechnology to catch up with the massive, undigested literature. This prohibits the reader from gaining a complete understanding of NZVI science and technology. In this volume, the sixteen chapters are based on more than two decades of laboratory research and development and field-scaled demonstrations of NZVI implementation. The authors of each chapter are leading researchers and/or practitioners in NZVI technology. This book aims to be an important resource for all levels of audiences, i.e. graduate students, experienced environmental and nanotechnology researchers, and practitioners evaluating environmental remediation, as it is designed to involve everything from basic to advanced concepts.

Investigations on Mobility of Carbon Colloid Supported Nanoscale Zero-valent Iron (nZVI) for Groundwater Remediation

Author :
Publisher :
ISBN 13 :
Total Pages : 127 pages
Book Rating : 4.:/5 (935 download)

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Book Synopsis Investigations on Mobility of Carbon Colloid Supported Nanoscale Zero-valent Iron (nZVI) for Groundwater Remediation by :

Download or read book Investigations on Mobility of Carbon Colloid Supported Nanoscale Zero-valent Iron (nZVI) for Groundwater Remediation written by and published by . This book was released on 2015 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Injection of nanoscale zero-valent iron (nZVI) is an innovative technology for in situ installation of a permeable reactive barrier in the subsurface. Zerovalent iron (ZVI) is highly reactive with chlorinated hydrocarbons (CHCs) and renders them into less harmful substances. Application of nZVI instead of granular ZVI can increase rates of dechlorination of CHCs by orders of magnitude, due to its higher surface area. This approach is still difficult to apply due to fast agglomeration and sedimentation of colloidal suspensions of nZVI, which leads to very short transport distances. To overcome this issue of limited mobility, polyanionic stabilisers are added to increase surface charge and stability of suspensions. In field experiments maximum transport distances of a few metres were achieved. A new approach, which is investigated in this thesis, is enhanced mobility of nZVI by a more mobile carrier colloid. The investigated composite material consists of activated carbon, which is loaded with nZVI. In this cumulative thesis, transport characteristics of carbon-colloid supported nZVI (c-nZVI) are investigated. Investigations started with column experiments in 40 cm columns filled with various porous media to investigate on physicochemical influences on transport characteristics. The experimental setup was enlarged to a transport experiment in a 1.2-m-sized two-dimensional aquifer tank experiment, which was filled with granular porous media. Further, a field experiment was performed in a natural aquifer system with a targeted transport distance of 5.3 m. Parallel to these investigations, alternative methods for transport observations were investigated by using noninvasive tomographic methods. Experiments using synchrotron radiation and magnetic resonance (MRI) were performed to investigate in situ transport characteristics in a non-destructive way. Results from column experiments show potentially high mobility under environmental relevant conditions. Addition of mono-and bivalent salts, e.g. more than 0.5 mM/L CaCl2, might decrease mobility. Changes in pH to values below 6 can inhibit mobility at all. Measurements of colloid size show changes in the mean particle size by a factor of ten. Measurements of zeta potential revealed an increase of -62 mV to -82 mV. Results from the 2D-aquifer test system suggest strong particle deposition in the first centimetres and only weak straining in the further travel path and no gravitational influence on particle transport. Straining at the beginning of the travel path in the porous medium was observed with tomographic investigations of transport. MRI experiments revealed similar results to the previous experiments, and observations using synchrotron radiation suggest straining of colloids at pore throats. The potential for high transport distances, which was suggested from laboratory experiments, was confirmed in the field experiment, where the transport distance of 5.3 m was reached by at least 10% of injected nZVI. Altogether, transport distances of the investigated carbon-colloid supported nZVI are higher than published results of traditional nZVI

Field Scale Application of Nanoscale Zero Valent Iron

Author : Michael Donald Kocur
Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Field Scale Application of Nanoscale Zero Valent Iron by : Michael Donald Kocur

Download or read book Field Scale Application of Nanoscale Zero Valent Iron written by Michael Donald Kocur and published by . This book was released on 2015 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis began by verifying that nanoscale zero valent iron (nZVI) synthesis methods could be scaled up and implemented at the field scale in a safe manner. This led to successful demonstration of nZVI injection and mobility under constant head gravity injection into a contaminated utility corridor in Sarnia, Ontario. Where field studies have fallen short in the past was linking the somewhat qualitative field geochemical parameters to other evidence of nZVI transport. Definitive nZVI detection was elusive in previous field studies due to the highly reactive nature of the particles caused by their high surface area. nZVI was detected and characterized in this study using UV/Vis spectrophotometry, Dynamic light scattering, zeta potential, Transmission Electron Microscopy, and energy dispersive x-ray spectroscopy, proving that field mobility was reliably achieved. The second study provides the first insight into the interactions and reaction that occur on an active field site immediately following nZVI injection. A fine temporal resolution of samples was used to define chlorinated ethene, ethane, and methane (cVOC) degradation among nZVI impacted zones, showing that these zones were distinct from areas that were not affected by nZVI. Building upon previous indirect evidence that nZVI enhances organohalide-respiring microorganisms, this study set out to prove that microbiological communities on sites were enhanced following injection. Quantitative polymerase chain reaction (qPCR) was used to target Dehalococcoides spp. (dhc) and vinyl chloride reductase genes (vcrA). The distinct zones where nZVI treatment was applied subsequently had high abundances of dhc and vcrA. The qPCR methods presented in the second study can act as a template for future field investigation on nZVI. Finally, the long-term effects of the injection amendments nZVI and Carboxymethyl-cellulose were monitoring on the microbial communities on site. It was hypothesized that the organohalide-respiring species on site would be enriched and cVOC degradation would be sustained due to the polymer amendments that accompany nZVI injection. Over a two year period next-generation pyrosequencing, qPCR, and cVOC degradation were monitored, providing the first ever phylum level microbiological evaluation at a field site undergoing remediation.

Metal Oxide Nanocomposites

Author : B. Raneesh
Publisher : John Wiley & Sons
ISBN 13 : 1119363578
Total Pages : 432 pages
Book Rating : 4.1/5 (193 download)

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Book Synopsis Metal Oxide Nanocomposites by : B. Raneesh

Download or read book Metal Oxide Nanocomposites written by B. Raneesh and published by John Wiley & Sons. This book was released on 2021-02-17 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanocomposites: Synthesis and Applications summarizes many of the recent research accomplishments in the area of metal oxide-based nanocomposites. This book focussing on the following topics: Nanocomposites preparation and characterization of metal oxide nanocomposites; synthesis of core/shell metal oxide nanocomposites; multilayer thin films; sequential assembly of nanocomposite materials; semiconducting polymer metal oxide nanocomposites; graphene-based metal and metal oxide nanocomposites; carbon nanotube–metal–oxide nanocomposites; silicon mixed oxide nanocomposites; gas semiconducting sensors based on metal oxide nanocomposites; metal ]organic framework nanocomposite for hydrogen production and nanocomposites application towards photovoltaic and photocatalytic.

Nanofer Zero-Valent Iron Nanoparticles

Author : Mahmoud Eglal
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)

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Book Synopsis Nanofer Zero-Valent Iron Nanoparticles by : Mahmoud Eglal

Download or read book Nanofer Zero-Valent Iron Nanoparticles written by Mahmoud Eglal and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aggregation and Transport of Nanoscale Zerovalent Iron Particles in Model Groundwater Systems

Author : Mohan Basnet
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (948 download)

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Book Synopsis Aggregation and Transport of Nanoscale Zerovalent Iron Particles in Model Groundwater Systems by : Mohan Basnet

Download or read book Aggregation and Transport of Nanoscale Zerovalent Iron Particles in Model Groundwater Systems written by Mohan Basnet and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Nanoscale zerovalent iron (NZVI) particles are promising engineered nanomaterials for the in situ remediation of various environmental contaminants into innocuous products. In field applications, direct injection of NZVI into the subsurface has been suggested as a promising technique for achieving rapid remediation. However, challenges have been encountered in field application that includes passivation, aggregation and limited transport. Therefore, the success of site remediation using NZVI depends on the progress made to increase nanoparticle reactivity, reduce aggregation and improve mobility. The overall objective of this research was to evaluate the aggregation and transport behavior of NZVI particles in environmentally relevant model groundwater environments. Palladium-doped NZVI (Pd-NZVI) was chosen to ensure heightened reactivity towards the contaminants to address the passivation problem whereas particle surface-modification with stabilizing polymers was investigated to reduce particle aggregation and concurrently improve transport. In this study, rhamnolipid biosurfactant was proposed for the first time as a novel stabilizing surface-modifier and its efficacy was compared with previously proposed surface-modifiers (carboxymethylcellulose and soy protein). By monitoring changes in particle hydrodynamic diameter as a function of time using dynamic light scattering followed by a systematic assessment of transport behavior in sand packed columns, it is shown that while bare Pd-NZVI is prone to rapid aggregation surface-modified Pd-NZVI exhibited good colloidal stability and improved transport at low ionic strengths (10 mM). In particular, rhamnolipid significantly enhanced transport even at much lower concentrations than the other surface modifiers (10 mg/L compared to 100 mg/L). However, an increase in solution ionic strength influenced both aggregation and transport behavior. Nonetheless, at the highest ionic strength tested, the transport of rhamnolipid-coated Pd-NZVI was significantly higher than that of Pd-NZVI coated with other surface modifiers suggesting that rhamnolipid is most suitable in field application.The transport potential of surface-modified Pd-NZVI was further examined in granular matrices of varied complexities: in quartz sand, in loamy sand and clay-amended quartz sand over a wide range of environmentally relevant ionic strengths. Data suggests that collector geochemical composition and heterogeneity can dramatically alter Pd-NZVI transport potential; markedly reduced transport potential was observed in loamy sand than in quartz sand.Given that microbes and biofilms are ubiquitous in the subsurface environment, the role of biofilm on Pd-NZVI transport was investigated by using biofilm-coated quartz sand to pack transport columns. Transport results showed heightened Pd-NZVI retention in the presence of biofilms suggesting that biofilms may act as a collector surface for nanoparticle retention in the groundwater environment. A viability assay suggests that the retained Pd-NZVI is non-toxic to the Pseudomonas aeruginosa cells in biofilms. However, some inhibitory effect was observed to planktonic bacterial cells. Finally, considering the cost associated with the use of Pd, an alternative reactive nanoparticle, sulfidated NZVI (S-NZVI), was also studied whereby the aggregation and transport behavior of S-NZVI was systematically investigated in a wide range of environmentally relevant water chemistries. Data suggests that sulfidation can influence NZVI surface electrokinetic properties, and thus its stability and transport in granular matrices.Overall, this study makes a major impact in the field of environmental remediation as it addresses key aspects of nanotechnology-enabled site remediation, particularly aspects pertaining to nanoparticle surface coating, collector grain physical, geochemical and biological heterogeneity, and groundwater chemistry." --

Iron Nanomaterials for Water and Soil Treatment

Author : Marta I. Litter
Publisher : CRC Press
ISBN 13 : 1351334786
Total Pages : 393 pages
Book Rating : 4.3/5 (513 download)

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Book Synopsis Iron Nanomaterials for Water and Soil Treatment by : Marta I. Litter

Download or read book Iron Nanomaterials for Water and Soil Treatment written by Marta I. Litter and published by CRC Press. This book was released on 2018-09-03 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology has a great potential for providing efficient, cost-effective, and environmentally acceptable solutions to face the increasing requirements on quality and quantity of fresh water for industrial, agricultural, or human use. Iron nanomaterials, either zerovalent iron (nZVI) or iron oxides (nFeOx), present key physicochemical properties that make them particularly attractive as contaminant removal agents for water and soil cleaning. The large surface area of these nanoparticles imparts high sorption capacity to them, along with the ability to be functionalized for the enhancement of their affinity and selectivity. However, one of the most important properties is the outstanding capacity to act as redox-active materials, transforming the pollutants to less noxious chemical species by either oxidation or reduction, such as reduction of Cr(VI) to Cr(III) and dehalogenation of hydrocarbons. This book focuses on the methods of preparation of iron nanomaterials that can carry out contaminant removal processes and the use of these nanoparticles for cleaning waters and soils. It carefully explains the different aspects of the synthesis and characterization of iron nanoparticles and methods to evaluate their ability to remove contaminants, along with practical deployment. It overviews the advantages and disadvantages of using iron-based nanomaterials and presents a vision for the future of this nanotechnology. While this is an easy-to-understand book for beginners, it provides the latest updates to experts of this field. It also opens a multidisciplinary scope for engineers, scientists, and undergraduate and postgraduate students. Although there are a number of books published on the subject of nanomaterials, not too many of them are especially devoted to iron materials, which are rather of low cost, are nontoxic, and can be prepared easily and envisaged to be used in a large variety of applications. The literature has scarce reviews on preparation of iron nanoparticles from natural sources and lacks emphasis on the different processes, such as adsorption, redox pathways, and ionic exchange, taking place in the removal of different pollutants. Reports and mechanisms on soil treatment are not commonly found in the literature. This book opens a multidisciplinary scope for engineers and scientists and also for undergraduate or postgraduate students.

Environmental Application and Implication of Nanoscale Zerovalent Iron

Author : Qiliang 'Luke' Wang
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659628252
Total Pages : 224 pages
Book Rating : 4.6/5 (282 download)

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Book Synopsis Environmental Application and Implication of Nanoscale Zerovalent Iron by : Qiliang 'Luke' Wang

Download or read book Environmental Application and Implication of Nanoscale Zerovalent Iron written by Qiliang 'Luke' Wang and published by LAP Lambert Academic Publishing. This book was released on 2015-01-06 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the environmental application and implication of nanoscale zerovlanet iron (NZVI) are studied. Reduction and removal of Bromate and TCE DNAPL using NZVI were evaluated for drinking water treatment and groundwater remediation. A visualization technique for TCE DNAPL removal using reactive NZVI and bimetallic nanoparticles was conducted using a glass micromodel with a view toward improved contaminant displacement. Inert/pseudo-inert gases, including argon, nitrogen, and carbon dioxide, were utilized to stabilize synthesized NZVI after lyophilization to prevent self-ignition. In addition, the aging effect was investigated for these stabilized NZVI both in humid and dry conditions. A new and simple method was proposed for encapsulating NZVI using poly (vinyl pyrrolidone) (PVP) nanofibrous membranes by an electrospinning technology to maintain catalytic activity. At last, mobilization and deposition of NZVI in a porous medium were observed using a water-saturated glass micromodel; a high-resolution microscope was utilized to visualize the transport phenomena of microscopic aggregations of NZVI inside the micromodel.

Transport and Development of Microemulsion- and Surfactant-Stabilized Iron Nanoparticles for In Situ Remediation

Author : Dennis Hsu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Transport and Development of Microemulsion- and Surfactant-Stabilized Iron Nanoparticles for In Situ Remediation by : Dennis Hsu

Download or read book Transport and Development of Microemulsion- and Surfactant-Stabilized Iron Nanoparticles for In Situ Remediation written by Dennis Hsu and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work describes the mobility assessments of microemulsion-stabilized iron oxide nanoparticles and anionic surfactant sodium diethyl hexyl phosphate (SDEHP)-stabilized nanoscale zero valent iron (NZVI) particles in laboratory porous media. The two formulations tested in this work achieved stable iron nanoparticle suspensions for months and prepared via a simple â one-potâ synthesis method developed by Wang et al. Both formulations were tested under field scale velocity of 5 m/day with no mechanical aid during the injection. A three-compartment model, involving colloid diffusion theory, diffusion theory and tailing was applied to describe the breakthrough curves of the studies. The obtained breakthrough curves of both formulations implied excellent transport in porous media with steady plateau C/Co at 0.8-0.9 and recovery of up to 0.95 for SDEHP stabilized NZVI. Post analysis on the retention of iron on the porous media implied ideal transport with consistent data to the breakthrough curves.

Surface Functionalization of Nanoscale Zerovalent Iron Particles for Trichloroethene Degradation

Author : Sourjya Bhattacharjee
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (953 download)

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Book Synopsis Surface Functionalization of Nanoscale Zerovalent Iron Particles for Trichloroethene Degradation by : Sourjya Bhattacharjee

Download or read book Surface Functionalization of Nanoscale Zerovalent Iron Particles for Trichloroethene Degradation written by Sourjya Bhattacharjee and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis investigates the applicability of surface functionalization techniques for nanoscale zerovalent iron (NZVI) particles for improving the degradation of a toxic, common groundwater contaminant, trichloroethene (TCE). Although NZVI has emerged as a promising environmental remediation agent in the past decade and has the potential to transform a number of chlorinated organic pollutants to non-toxic end products, factors such as loss of electrons to reactions with water, formation of passivating oxide layers on NZVI surface and aggregation of NZVI to micron-sized particles pose significant challenges in the application of NZVI for TCE remediation. This research investigated techniques for the modification of NZVI surface with secondary metals (e.g. palladium), inorganic ions (e.g. sulfide), polyelectrolytes and surfactants (e.g. carboxymethylcellulose and rhamnolipid), and solid supports (e.g. activated carbon) to enhance reactivity through mitigation of the challenges mentioned above. The research was aimed at assessing the increases in reactivity, and also characterizing the fundamental physico-chemical processes that were responsible for the changes in reactivity. It was observed that organic macromolecules such as rhamnolipid (M.W. 600 g mol-1) sorbed on NZVI and prevented the deposition of rate enhancing surface dopants namely, palladium and sulfide, and inhibited TCE degradation. Conversely larger molecules such as carboxymethylcellulose (M.W. 700000 g mol-1) and humic acids bound to NZVI hindered deposition of the surface dopants to a lesser extent. Powdered activated carbon when used as a support for embedding NZVI was observed to significantly enhance the TCE degradation rate, however the method adopted for deposition of NZVI critically affected the rate enhancements because of changes in structural properties of activated carbon. Lastly, a phase transfer approach was developed to degrade the solvent (oil) phase of TCE using a rhamnolipid coated Pd-NZVI. This approach enabled 50% higher degradation of TCE solvent compared to a system where phase transfer was not employed." --

Fate and Transport of Nano Zero-valent Iron (NZVI) in Subsurface Porous Media During Groundwater Remediation

Author : Haoran Dong
Publisher :
ISBN 13 :
Total Pages : 149 pages
Book Rating : 4.:/5 (871 download)

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Book Synopsis Fate and Transport of Nano Zero-valent Iron (NZVI) in Subsurface Porous Media During Groundwater Remediation by : Haoran Dong

Download or read book Fate and Transport of Nano Zero-valent Iron (NZVI) in Subsurface Porous Media During Groundwater Remediation written by Haoran Dong and published by . This book was released on 2013 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Transport, Reactivity and Fate of Polyelectrolyte Modified Zero Valent Iron Nanoparticles Used for Groundwater Remediation in Heterogeneous Porous Media

Download Transport, Reactivity and Fate of Polyelectrolyte Modified Zero Valent Iron Nanoparticles Used for Groundwater Remediation in Heterogeneous Porous Media PDF Online Free

Author : Hye-Jin Kim
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)

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Book Synopsis Transport, Reactivity and Fate of Polyelectrolyte Modified Zero Valent Iron Nanoparticles Used for Groundwater Remediation in Heterogeneous Porous Media by : Hye-Jin Kim

Download or read book Transport, Reactivity and Fate of Polyelectrolyte Modified Zero Valent Iron Nanoparticles Used for Groundwater Remediation in Heterogeneous Porous Media written by Hye-Jin Kim and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nanoparticle Transport in Porous Medium and Nanosized Zero-valent Iron (nZVI) for Environmental Remediation

Author : Guiming Zhai
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (688 download)

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Book Synopsis Nanoparticle Transport in Porous Medium and Nanosized Zero-valent Iron (nZVI) for Environmental Remediation by : Guiming Zhai

Download or read book Nanoparticle Transport in Porous Medium and Nanosized Zero-valent Iron (nZVI) for Environmental Remediation written by Guiming Zhai and published by . This book was released on 2010 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Transport of Surface-modified Iron Nanoparticles Through Model Subsurface Porous Media

Author : Trishikhi Raychoudhury
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (786 download)

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Book Synopsis Transport of Surface-modified Iron Nanoparticles Through Model Subsurface Porous Media by : Trishikhi Raychoudhury

Download or read book Transport of Surface-modified Iron Nanoparticles Through Model Subsurface Porous Media written by Trishikhi Raychoudhury and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: AbstractThe overall objective of this research is to evaluate significant mechanisms for deposition of surface-modified NZVI in granular subsurface media during transport. Although surface-modified NZVI have been shown to transport more easily than bare NZVI, there is a lack of knowledge of how different parameters such NZVI particle concentration, NZVI size, aqueous-phase flow velocity, and sand particle size influence nanoparticle transport. To investigate the effects of these parameters on transport, a number of laboratory experiments were conducted with NZVI synthesized from ferrous sulfate in the presence of polymers that were effective in colloidal stabilization of the particles. The bare and surface modified-NZVI was characterized for size and surface chemistry by a wide array of analytical instruments. The polymer-stabilized NZVI were employed in three different studies to identify parameters that influence deposition of NZVI in model, granular ...

Colloidal Transport in Porous Media

Author : Fritz H. Frimmel
Publisher : Springer Science & Business Media
ISBN 13 : 3540713395
Total Pages : 294 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Colloidal Transport in Porous Media by : Fritz H. Frimmel

Download or read book Colloidal Transport in Porous Media written by Fritz H. Frimmel and published by Springer Science & Business Media. This book was released on 2007-05-26 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the basics of abiotic colloid characterization, of biocolloids and biofilms, the resulting transport phenomena and their engineering aspects. The contributors comprise an international group of leading specialists devoted to colloidal sciences. The contributions include theoretical considerations, results from model experiments, and field studies. The information provided here will benefit students and scientists interested in the analytical, chemical, microbiological, geological and hydrological aspects of material transport in aquatic systems and soils.

Chlorinated Solvent Source Zone Remediation

Author : Bernard H. Kueper
Publisher : Springer Science & Business
ISBN 13 : 1461469228
Total Pages : 759 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Chlorinated Solvent Source Zone Remediation by : Bernard H. Kueper

Download or read book Chlorinated Solvent Source Zone Remediation written by Bernard H. Kueper and published by Springer Science & Business. This book was released on 2014-04-22 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to help engineers and scientists better understand dense nonaqueous phase liquid (DNAPL) contamination of groundwater and the methods and technology used for characterization and remediation. Remediation of DNAPL source zones is very difficult and controversial and must be based on state-of-the-art knowledge of the behavior (transport and fate) of nonaqueous phase liquids in the subsurface and site specific geology, chemistry and hydrology. This volume is focused on the characterization and remediation of nonaqueous phase chlorinated solvents and it is hoped that mid-level engineers and scientists will find this book helpful in understanding the current state-of-practice of DNAPL source zone management and remediation.