Particle Deposition and Aggregation

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Publisher : Butterworth-Heinemann
ISBN 13 : 1483161374
Total Pages : 458 pages
Book Rating : 4.4/5 (831 download)

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Book Synopsis Particle Deposition and Aggregation by : M. Elimelech

Download or read book Particle Deposition and Aggregation written by M. Elimelech and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle Deposition and Aggregation: Measurement, Modelling and Simulation describes how particle deposition and aggregation can be measured, modeled, and simulated in a systematic manner. It brings together the necessary disciplines of colloid and surface chemistry, hydrodynamics, experimental methods, and computational methods to present a unified approach to this problem. The book is divided into four parts. Part I presents the theoretical principles governing deposition and aggregation phenomena, including a discussion of the forces that exist between particles and the hydrodynamic factors that control the movement of the particles and suspending fluid. Part II introduces methods for modeling the processes, first at a simple level (e.g. single particle-surface, single particle-single particle interactions in model flow conditions) and then describes the simulation protocols and computation tools which may be employed to describe more complex (multiple-particle interaction) systems. Part III summarizes the experimental methods of quantifying aggregating and depositing systems and concludes with a comparison of experimental results with those predicted using simple theoretical predictions. Part IV is largely based on illustrative examples to demonstrate the application of simulation and modeling methods to particle filtration, aggregation, and transport processes. This book should be useful to graduates working in process and environmental engineering research or industrial development at a postgraduate level, and to scientists who wish to extend their knowledge into more realistic process conditions in which the fluid hydrodynamics and other complicating factors must be accommodated.

Particle Deposition and Aggregation - Measurement, Modelling and Simulation

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Particle Deposition and Aggregation - Measurement, Modelling and Simulation by : Elimelech M.

Download or read book Particle Deposition and Aggregation - Measurement, Modelling and Simulation written by Elimelech M. and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Particle Aggregation with Simultaneous Surface Growth

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Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Particle Aggregation with Simultaneous Surface Growth by :

Download or read book Particle Aggregation with Simultaneous Surface Growth written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle aggregation with simultaneous surface growth was modeled using a dynamic Monte Carlo method. The Monte Carlo algorithm begins in the particle inception zone and constructs aggregates via ensemble-averaged collisions between spheres and deposition of gaseous species on the sphere surfaces. Simulations were conducted using four scenarios. The first, referred to as scenario 0, is used as a benchmark and simulates aggregation in the absence of surface growth. Scenario 1 forces all balls to grow at a uniform rate while scenario 2 only permits them to grow once they have collided and stuck to each other. The last one is a test scenario constructed to confirm conclusions drawn from scenarios 0-2. The transition between the coalescent and the fully-developed fractal aggregation regimes is investigated using shape descriptors to quantify particle geometry. They are used to define the transition between the coalescent and fractal growth regimes. The simulations demonstrate that the morphology of aggregating particles is intimately related to both the surface deposition and particle nucleation rates.

Aggregation and Deposition of Gold Nanoparticles in Singular and Binary Particle Systems

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Publisher :
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (988 download)

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Book Synopsis Aggregation and Deposition of Gold Nanoparticles in Singular and Binary Particle Systems by : A. R. M. Nabiul Afrooz

Download or read book Aggregation and Deposition of Gold Nanoparticles in Singular and Binary Particle Systems written by A. R. M. Nabiul Afrooz and published by . This book was released on 2015 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineered nanomaterials (ENMs) are used in numerous applications due to their unique advantages. Gold nanomaterials (AuNMs) are one such functional ENM, which are utilized as model nanoparticles due to their controlled properties. AuNMs can be synthesized with highly uniform size and shape, where increase in the anisotropy gives rise to novel properties; e.g., unique Plasmon resonance, shape dependent physico-chemical properties, and quantum confinement, etc. These advantages have popularized the use of AuNMs in a wide range of applications in sensing, drug delivery, and photodynamic therapies. Increased use of these ENMs calls for systematic evaluation of the AuNMs to assess the effect of their size and shape on fate and transport in aquatic environment. The natural environment, due to the presence of natural colloids and potential presence of secondary ENMs, presents additional system complexities in studying ENM fate and transport. This dissertation was designed to address two major data gaps: i.e., roles of i) anisotropy and ii) presence of secondary particles on aggregation and deposition of AuNMs. Poly-acrylic acid (PAA) coated uniform-sized gold nanospheres (AuNS) and nanorods (AuNR) are utilized as model nanoparticles. The first part of this research investigated the effect of shape of AuNMs on their aggregation and deposition in singular particulate system under relevant ionic strengths. The second part of this dissertation focused on investigation of the effects of a secondary nanoparticle, i.e., pluronic acid modified single-walled carbon nanotubes (PA-SWNTs), on aggregation and filtration of AuNSs under a wide range of ionic strength. Effects of shape of AuNMs on their aggregation kinetics were investigated by employing time resolved dynamic light scattering (TRDLS) in a wide range of mono- and di-valent electrolyte conditions. Aggregation histories were obtained for the AuNSs and AuNRs in presence of a wide range of NaCl and CaCl2 conditions. The critical coagulation concentrations (CCCs), computed from the stability plots of the AuNMs, were used to compare the aggregation propensity of the PAA coated AuNSs with the AuNRs. The deposition kinetics was monitored using the quartz crystal microbalance with dissipation (QCM-D) technique for a range of NaCl concentrations. Deposition rates determined were used to understand the effects of shape of the AuNMs on their deposition kinetics. Experimental findings suggest that the shape of nanomaterials can influence interfacial properties and result in unique aggregation and deposition behavior under typical aquatic conditions Effects of AuNS size on their aggregation behavior was investigated using citrate stabilized 30 nm and 60 nm sized National Institute of Standards and Technology (NIST) standard particles in biological media. Continuous size evolution of AuNS aggregates was monitored over a 24 h period employing DLS and static light scattering (SLS). Electrokinetic measurements, UV-vis spectroscopy, and electron microscopy were performed for material characterization. The findings from this study indicate that initial differences in AuNS sizes diminish over time as the particles aggregate under the influence of elevated ionic strength in the media. The results from this study will likely influence characterization and experimental design considerations for in vitro nanotoxicity studies. The effects of the presence of a secondary particle, PA-SWNTs, on hetero-aggregation behavior of PAA coated AuNS were systematically studied over a wide range of mono- and divalent electrolyte conditions. PA modification of SWNTs made them stable in the entire range of electrolyte concentration where SWNT-SWNT aggregation has been eliminated via steric interaction. Hetero-aggregation mechanisms of AuNS were deciphered utilizing electron microscopy and electrokinetics. Experimental results suggest that the AuNS aggregates faster in hetero-dispersion in presence of PA-SWNT than in homo-disperstion at elevated ionic strength. However, hetero-rates are slower in case of low ionic strength cases. Techniques developed in this study can be can be adopted elsewhere to assess hetero-aggregation of a wider set of ENMs, hence achieving reliability in nanoparticle environmental exposure and risk. Co-transport of AuNS in presence of PA-SWNTs through saturated porous media was also assessed using bench-scale column experiments under a wide range of aquatic conditions (1-100 mM NaCl). Homogenous AuNS suspensions were utilized as control to compare their breakthrough properties with those of the AuNS hetero-dispersions (in presence of PA-SWNTs). This study also assessed the role of pre-coating of the collectors (with PA-SWNTs) on AuNS' mobility to understand the order of introduction of the secondary particles. The study results demonstrate that the presence of secondary particles and the order in which these are introduced to the experimental system strongly influence AuNS mobility. Thus ENM can be highly mobile or can get strongly filtered out, depending on the secondary PA-SWNT and background environmental conditions. This research not only evaluates the role of material attributes in their fate and transport but also extends to assess the role of environmental complexities on the same. The research findings enhance our current understanding of environmental interaction of the ENMs and call for further studies, incorporating additional complexities (i.e., material and system), to assess the fate, transport, and effects of the ENMs in the natural environment.

Nanotoxicology

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Publisher : CRC Press
ISBN 13 : 1420045156
Total Pages : 452 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Nanotoxicology by : Nancy A. Monteiro-Riviere

Download or read book Nanotoxicology written by Nancy A. Monteiro-Riviere and published by CRC Press. This book was released on 2007-07-25 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials - structures with characteristic dimensions between 1 and 100 nm -exhibit a variety of unique and tunable chemical and physical properties that have made engineered nanoparticles central components in an array of emerging technologies. The use of nanotechnology is increasing; however its potential adverse effects on human health are n

Kinetics of Aggregation and Gelation

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Publisher : Elsevier
ISBN 13 : 0444596585
Total Pages : 295 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Kinetics of Aggregation and Gelation by : F. Family

Download or read book Kinetics of Aggregation and Gelation written by F. Family and published by Elsevier. This book was released on 2012-12-02 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kinetics of Aggregation and Gelation presents the proceedings of the International Topical Conference on Kinetics of Aggregation and Gelation held on April 2-4, 1984 in Athens, Georgia. The purpose of the conference was to bring together international experts from a wide variety of backgrounds who are studying phenomena inherently similar to the formation of large clusters by the union of many separate, small elements, to present and exchange ideas on new theories and results of experimental and computer simulations. This book is divided into 57 chapters, each of which represents an oral presentation that is part of a unified whole. The book begins with a presentation on fractal concepts in aggregation and gelation, followed by presentations on topics such as aggregative fractals called ""squigs""; multi-particle fractal aggregation; theory of fractal growth processes; self-similar structures; and interface dynamics. Other chapters cover addition polymerization and related models; the kinetic gelation model; a new model of linear polymers; red cell aggregation kinetics; the Potts Model; aggregation of colloidal silica; the ballistic model of aggregation; stochastic dynamics simulation of particle aggregation; particle-cluster aggregation; kinetic clustering of clusters; computer simulations of domain growth; and perspectives in the kinetics of aggregation and gelation. This book will be of interest to practitioners in the fields of chemistry, theoretical physics, and materials engineering.

Nanomaterial

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Publisher : Springer Science & Business Media
ISBN 13 : 9401787395
Total Pages : 284 pages
Book Rating : 4.4/5 (17 download)

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Book Synopsis Nanomaterial by : David G. Capco

Download or read book Nanomaterial written by David G. Capco and published by Springer Science & Business Media. This book was released on 2014-03-28 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly developing field of nanomaterials has expanded in many commercial areas. More recent studies have begun to provide a foundation for understanding how nanomaterials influence cells and how they also can serve as methodological tools for studies in medicine and cell biology, including research into stem cells. Recent investigations have shown affects of nanomaterials on specific subcellular structures, such as the actin-based brush border network in cells with an increasing emphasis on the barrier function of epithelial tissues. While other studies have shown involvement of nanoparticles in specific cytoplasmic signal transduction events such as the rise in intracellular free calcium, a signaling event known to regulate many changes in cell architecture and function. In parallel, nanomaterials are increasingly used in medicine for drug delivery, treatment of cancer and an increasing number of new applications. This book investigates these areas and also includes new methods for assessment in cell biology and medicine.

Waste Water Treatment Technologies  - Volume I

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Publisher : EOLSS Publications
ISBN 13 : 1848261888
Total Pages : 448 pages
Book Rating : 4.8/5 (482 download)

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Book Synopsis Waste Water Treatment Technologies  - Volume I by : Saravanamuthu Vigneswaran

Download or read book Waste Water Treatment Technologies  - Volume I written by Saravanamuthu Vigneswaran and published by EOLSS Publications. This book was released on 2009-09-15 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water and Wastewater Treatment Technologies theme is a component of Encyclopedia of Water Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The Theme on Water and Wastewater Treatment Technologies deals, in three volumes, and covers several topics, with several issues of great relevance to our world such as: Urban Wastewater Treatment; Characteristics of Effluent Organic Matter in Wastewater; Filtration Technologies in wastewater treatment; Air Stripping in Industrial Wastewater Treatment; Dissolved air flotation in industrial wastewater treatment; Membrane Technology for Organic Removal in Wastewater; Adsorption and Biological Filtration in Wastewater Treatment; Physico-chemical processes for Organic removal from wastewater effluent; Deep Bed Filtration: Modelling Theory And Practice ; Specific options in biological wastewater treatment for reclamation and reuse ; Biological Phosphorus Removal Processes For Wastewater Treatment ; Sequencing Batch Reactors: Principles, Design/Operation And Case Studies ; Wastewater stabilization ponds (WSP)for wastewater treatment; Treatment of industrial wastewater by membrane bioreactors; Stormwater treatment technologies; Sludge Treatment Technologies ; Wastewater Treatment Technology For Tanning Industry; Palm Oil And Palm Waste Potential In Indonesia ; Recirculating Aquaculture Systems – A Review ; Upflow anaerobic sludge blanket (UASB)reactor in wastewater treatment; Applied Technologies In Municipal Solid Waste Landfill Leachate Treatment; Water Mining: Planning and Implementation Issues for a successful project; Assessment methodologies for water reuse scheme and technology; Nanotechnology for Wastewater Treatment. These three volumes are aimed at the following five major target audiences: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, Managers, and Decision makers and NGOs W

COMMON FUNDAMENTALS AND UNIT OPERATIONS IN THERMAL DESALINATION SYSTEMS - Volume II

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Publisher : EOLSS Publications
ISBN 13 : 1848264224
Total Pages : 386 pages
Book Rating : 4.8/5 (482 download)

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Book Synopsis COMMON FUNDAMENTALS AND UNIT OPERATIONS IN THERMAL DESALINATION SYSTEMS - Volume II by :

Download or read book COMMON FUNDAMENTALS AND UNIT OPERATIONS IN THERMAL DESALINATION SYSTEMS - Volume II written by and published by EOLSS Publications. This book was released on 2010-11-08 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: These volumes are part of Encyclopedia of Water Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty one Encyclopedias. The three volumes present state-of-the art subject matter of various aspects of Common Fundamentals and Unit Operations in Thermal Desalination Systems such as: Conventional Water Treatment Technologies; Guidelines for Potable Water Purification; Advanced Treatment Technologies for Recycle - Reuse of Domestic Wastewater; Composition of Desalinated Water; Crystallization; Deep Bed Filtration: Modeling Theory and Practice; Distillation ; Rectification; Flocculation and Flocculation Filtration; Hazardous Waste Treatment Technologies; Microfiltration and Ultrafiltration; Post-Treatment of Distillate and Permeate; Pre-Cleaning Measures: Filtration; Raw Water Pre-Treatment: Sludge Treatment Technologies; Supercritical Extraction; Potential for Industrial Wastewater Reuse; Treatment of Industrial Wastewater by Membrane Bioreactors; Unconventional Sources of Water Supply; Problem of Non-Condensable Gas Release in Evaporators; Entrainment in Evaporators; Mist Eliminators; Chemical Hazards in Seawater Desalination by the Multistage-Flash Evaporation Technique; Concentration of Liquid Foods; Environmental Impact of Seawater Desalination Plants; Environmental Impacts of Intakes and Out Falls; Industrial Ecology, Water Resources, and Desalination; Rural and Urban Water Supply and Sanitation; Sustainable Development, Water Supply and Sanitation Technology These volumes are aimed at the following five major target audiences: University and College Students Educators, Professional Practitioners, Research Personnel and Policy and Decision Makers.

Environmental Colloids and Particles

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Publisher : John Wiley & Sons
ISBN 13 : 047002433X
Total Pages : 702 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Environmental Colloids and Particles by : Kevin J. Wilkinson

Download or read book Environmental Colloids and Particles written by Kevin J. Wilkinson and published by John Wiley & Sons. This book was released on 2007-01-30 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents the current knowledge of environmental colloids and includes reviews of the current understanding of structure, role and behaviour of environmental colloids and particles, whilst focussing directly on aquatic systems and soils. In addition, there is substantial critical assessment of the techniques employed for the sampling, size fractionation and characterisation of colloids and particles. Chemical, physical and biological processes and interactions involving colloids are described, and particular attention is paid to quantitative approaches that take account of particle heterogeneity and polydispersity. Presents critical reviews of the state-of-the-art knowledge of environmental colloids Critical assessment of techniques employed for the sampling, size fractionation and characterisation of colloids and particles are given Theoretical and experimental aspects of the methods as well as the required developments and possible recommendations are discussed Each chapter gives a brief introduction general enough for the non-specialist Written by a internationally recognized group of contributors

Nanoscale Zerovalent Iron Particles for Environmental Restoration

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Publisher : Springer
ISBN 13 : 3319953400
Total Pages : 597 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 597 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.

Particulate Plastics in Terrestrial and Aquatic Environments

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Author :
Publisher : CRC Press
ISBN 13 : 1000081419
Total Pages : 466 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Particulate Plastics in Terrestrial and Aquatic Environments by : Nanthi S. Bolan

Download or read book Particulate Plastics in Terrestrial and Aquatic Environments written by Nanthi S. Bolan and published by CRC Press. This book was released on 2020-07-30 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The manufacture of plastic as well as its indiscriminate disposal and destruction by incineration pollutes atmospheric, terrestrial, and aquatic ecosystems. Synthetic plastics do not break down; they accumulate in the environment as macro-, micro-, and nanoplastics. These particulate plastics are a major source of pollutants in soil and marine ecosystems. Particulate Plastics in Terrestrial and Aquatic Environments provides a fundamental understanding of the sources of these plastics and the threats they pose to the environment. The book demonstrates the ecotoxicity of particulate plastics using case studies and offers management practices to mitigate particulate plastic contamination in the environment. Features · Describes physical and chemical properties of particulate plastics in terrestrial and aquatic ecosystems · Presents information on characteristics of particulate plastics as impacted by weathering processes · Provides numerous approaches for managing particulate plastic contamination · Identifies sources of particulate plastics in the environment; distribution and characteristics of particulate plastics; and management strategies of particulate plastics Written by a global team of scientists, this book is for researchers in the fields of environmental safety and waste management or individuals interested in the impact of particulate plastics on environmental health.

Microfluidics and Nanofluidics

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Publisher : BoD – Books on Demand
ISBN 13 : 1789235405
Total Pages : 320 pages
Book Rating : 4.7/5 (892 download)

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Book Synopsis Microfluidics and Nanofluidics by : Mohsen Sheikholeslami Kandelousi

Download or read book Microfluidics and Nanofluidics written by Mohsen Sheikholeslami Kandelousi and published by BoD – Books on Demand. This book was released on 2018-08-22 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present book, various applications of microfluidics and nanofluidics are introduced. Microfluidics and nanofluidics span a broad array of disciplines including mechanical, materials, and electrical engineering, surface science, chemistry, physics and biology. Also, this book deals with transport and interactions of colloidal particles and biomolecules in microchannels, which have great importance to many microfluidic applications, such as drug delivery in life science, microchannel heat exchangers in electronic cooling, and food processing industry. Furthermore, this book focuses on a detailed description of the thermal transport behavior, challenges and implications that involve the development and use of HTFs under the influence of atomistic-scale structures and industrial applications.

Industrial Ventilation Design Guidebook

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Publisher : Academic Press
ISBN 13 : 0128167793
Total Pages : 745 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Industrial Ventilation Design Guidebook by : Howard D. Goodfellow

Download or read book Industrial Ventilation Design Guidebook written by Howard D. Goodfellow and published by Academic Press. This book was released on 2021-06-04 with total page 745 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial Ventilation Design Guidebook, Volume 2: Engineering Design and Applications brings together researchers, engineers (both design and plants), and scientists to develop a fundamental scientific understanding of ventilation to help engineers implement state-of-the-art ventilation and contaminant control technology. Now in two volumes, this reference contains extensive revisions and updates as well as a unique section on best practices for the following industrial sectors: Automotive; Cement; Biomass Gasifiers; Advanced Manufacturing; Industrial 4.0); Non-ferrous Smelters; Lime Kilns; Pulp and Paper; Semiconductor Industry; Steelmaking; Mining. Brings together global researchers and engineers to solve complex ventilation and contaminant control problems using state-of-the-art design equations Includes an expanded section on modeling and its practical applications based on recent advances in research Features a new chapter on best practices for specific industrial sectors

Colloid Deposition and Aggregation in the Presence of Charged Collectors

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Publisher :
ISBN 13 :
Total Pages : 89 pages
Book Rating : 4.:/5 (918 download)

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Book Synopsis Colloid Deposition and Aggregation in the Presence of Charged Collectors by : Behnam Sadri

Download or read book Colloid Deposition and Aggregation in the Presence of Charged Collectors written by Behnam Sadri and published by . This book was released on 2015 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colloidal-collector interactions are of fundamental importance in separation and filtration technologies. Here, the effect of collector grains on the behavior of colloidal particles was studied in two different experimental systems, i.e., column studies with stationary collectors and batch mixing to study hetero aggregation. Polystyrene latex beads, 100 nm diameter, and soda lime glass beads, with two different diameters of 212-300 $\mu$m and 710-1180 $\mu$m, were employed as colloidal particles and collector grains, respectively. Column experiments were performed to understand fate of colloidal particles in the porous medium. There are three major phenomena that control colloidal transport in porous media: Deposition, aggregation, and straining. These three distinct types of particle dynamics in porous media were studied by adjusting physicochemical properties of colloidal suspension. Furthermore, the effect of washing the collector beads was studied. Batch experiments, in which known amount of collector grains are added to colloidal suspension with known concentration, are designed to investigate more collector-colloids interaction role in transport dynamics of colloidal particles. UV-Vis spectroscopy and dynamic light scattering techniques are employed to understand both deposition and aggregation of colloidal particles in the vicinity of collector grains. Results obtained by dynamic light scattering revealed that aggregation is the predominant factor in this colloidal system. The possible sources for this type of behavior are also tackled by undertaking controlled experiments. In the batch experiments, ions leaching from the surface of glass beads, effect of mixing, and glass beads presence are confirmed as the three major reasons behind the aggregation of colloidal particles.

Computational Nanotoxicology

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Publisher : CRC Press
ISBN 13 : 1000680886
Total Pages : 570 pages
Book Rating : 4.0/5 (6 download)

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Book Synopsis Computational Nanotoxicology by : Agnieszka Gajewicz

Download or read book Computational Nanotoxicology written by Agnieszka Gajewicz and published by CRC Press. This book was released on 2019-11-13 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of computational methods that support human health and environmental risk assessment of engineered nanomaterials (ENMs) has attracted great interest because the application of these methods enables us to fill existing experimental data gaps. However, considering the high degree of complexity and multifunctionality of ENMs, computational methods originally developed for regular chemicals cannot always be applied explicitly in nanotoxicology. This book discusses the current state of the art and future needs in the development of computational modeling techniques for nanotoxicology. It focuses on (i) computational chemistry (quantum mechanics, semi-empirical methods, density functional theory, molecular mechanics, molecular dynamics), (ii) nanochemoinformatic methods (quantitative structure–activity relationship modeling, grouping, read-across), and (iii) nanobioinformatic methods (genomics, transcriptomics, proteomics, metabolomics). It reviews methods of calculating molecular descriptors sufficient to characterize the structure of nanoparticles, specifies recent trends in the validation of computational methods, and discusses ways to cope with the uncertainty of predictions. In addition, it highlights the status quo and further challenges in the application of computational methods in regulation (e.g., REACH, OECD) and in industry for product development and optimization and the future directions for increasing acceptance of computational modeling for nanotoxicology.

Analysis and Risk of Nanomaterials in Environmental and Food Samples

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Author :
Publisher : Newnes
ISBN 13 : 0444563296
Total Pages : 382 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Analysis and Risk of Nanomaterials in Environmental and Food Samples by : Damia Barcelo

Download or read book Analysis and Risk of Nanomaterials in Environmental and Food Samples written by Damia Barcelo and published by Newnes. This book was released on 2012-08-20 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of nanotechnology in different consumer products has delivered new products with highly desirable properties, but at same time has opened a new window for a wide group of emerging contaminants and a new type of human exposure which needs to be assessed. Most of the current human toxicological information on nanomaterials comes from nano-sized particles in air, and their effects via inhalation. Other routes of human exposure, such as water and food, and the effects on human health and the environment have been less studied. It is the recent research in these areas that is highlighted here in one of the first books covering the analysis and ecotoxicological evaluation of nanomaterials in food and the environment, with both matrices being of considerable interest. In addition to providing a global summary of recent research, this book shows how widely used chromatographic and spectroscopic methods can be added to the analytical arsenal of microscopic techniques that have commonly been used to characterize nanomaterials. - Describes the analytical techniques used to characterize nanomaterials and their applications in environmental or food samples - Includes analysis and ecotoxicological evaluation of nanomaterials in food and environmental matrices - Takes a detailed look at the research on emerging fields of human exposure to nanomaterials and their environmental risks