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Arsenic Removal From Groundwater With Iron Tailored Granular Activated Carbon Preceded By Pre Corroded Steel
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Book Synopsis Arsenic Removal from Groundwater with Iron Tailored Granular Activated Carbon Preceded by Pre-corroded Steel by : Jiying Zou
Download or read book Arsenic Removal from Groundwater with Iron Tailored Granular Activated Carbon Preceded by Pre-corroded Steel written by Jiying Zou and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iron-impregnated Granular Activated Carbon for Arsenic Removal from Drinking Water by : Qigang Chang
Download or read book Iron-impregnated Granular Activated Carbon for Arsenic Removal from Drinking Water written by Qigang Chang and published by . This book was released on 2010 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Removal of Arsenic from Water Using Iron-impregnated Granular Activated Carbon by : Yong uk Lee
Download or read book Removal of Arsenic from Water Using Iron-impregnated Granular Activated Carbon written by Yong uk Lee and published by . This book was released on 2009 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Removal of Arsenic from Contaminated Water by Granular Activated Carbon Embedded with Nano Scale Zero-valent Iron by : Md. Rashadul Islam Chowdhury
Download or read book Removal of Arsenic from Contaminated Water by Granular Activated Carbon Embedded with Nano Scale Zero-valent Iron written by Md. Rashadul Islam Chowdhury and published by . This book was released on 2016 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the removal of arsenic from groundwater by granular activated carbon (GAC) supported nano scale zero-valent iron (nZVI). GAC supported nZVI (nZVI/GAC) composite was synthesized by hydrolyzing a Fe(III) salt on GAC, reduced by NaBH4 and dried under vacuum. Synthesized nZVI/GAC was characterized using scanning electron microscopy (SEM) along with EDS, BET surface area analysis, X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The experimental results were produced through the batch and Rapid Small Scale Column Test (RSSCT). The adsorption depends on pH, initial concentration, and reaction time. Arsenite adsorption capacity varies from 800 to 1400 ?g/g over the pH 2-11. Arsenate adsorption was higher (3000-3700 ?g/g) over the acidic pH range 2-6.5. Among competitive ions, phosphate and silicate affected the most while sulfate, nitrate, chloride, fluoride, manganese, magnesium and calcium had insignificant impact. The experimental data were evaluated with Langmuir and Freundlich isotherms. The adsorption capacity for arsenate, calculated from Langmuir and Freundlich isotherms, were 5000 and 6000 æg/g, respectively at pH 4.5. The reaction kinetics followed the pseudo-second order model. The initial sorption rate (h), determined from pseudo-second order kinetic model, was 666 æg/g.min. The dynamic behaviour of the RSSCT was predicted by the HSDM model using the software FAST 2.0. From the RSSCT results, it was found that the number of bed volumes treated depends on the empty bed contact time (EBCT) as well as the initial arsenate concentration. The regeneration of spent nZVI/GAC using 0.1M NaOH was effective as it desorbed 87% of adsorbed arsenic. The solid waste can be safely disposed of in a sanitary landfill without any treatment as the concentration of leached arsenate determined by TCLP was much lower than the regulatory limit. The arsenic removal mechanism was due to the combination of electrostatic and the complex formation, either monodentate or bidentate, between As(V) and nZVI corrosion products. The results indicated that nZVI/GAC is a promising adsorbent for arsenic removal.
Book Synopsis Fabrication and Evaluation of Hematite Modified Granular Activated Carbon (GAC) Media for Arsenic Removal from Groundwater by : Arti Jain
Download or read book Fabrication and Evaluation of Hematite Modified Granular Activated Carbon (GAC) Media for Arsenic Removal from Groundwater written by Arti Jain and published by . This book was released on 2011 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the study was twofold: (i) to investigate the synthesis of hematite-impregnated granular activated carbon (Fe-GAC) by hydrolysis of Fe (III) and (ii) to assess the effectiveness of the fabricated media in removal of arsenic from water. Fe-GAC was synthesized by hydrolysis of Fe(III) salts under two Fe (III) initial dosages (0.5M and 2M) and two hydrolysis periods (24 hrs and 72 hrs). The iron content of the fabricated Fe-GAC media ranged from 0.9% to 4.4% Fe/g of the dry media. Pseudo-equilibrium batch test data at pH = 7.7±0.2 in 1mM NaHCO3 buffered ultrapure water and challenge groundwater representative of the Arizona Mexico border region were fitted to a Freundlich isotherm model. The findings suggested that the arsenic adsorption capacity of the metal (hydr)oxide modified GAC media is primarily controlled by the surface area of the media, while the metal content exhibited lesser effect. The adsorption capacity of the media in the model Mexican groundwater matrix was significantly lower for all adsorbent media. Continuous flow short bed adsorber tests (SBA) demonstrated that the adsorption capacity for arsenic in the challenge groundwater was reduced by a factor of 3 to 4 as a result of the mass transport effects. When compared on metal basis, the iron (hydr)oxide modified media performed comparably well as existing commercial media for treatment of arsenic. On dry mass basis, the fabricated media in this study removed less arsenic than their commercial counterparts because the metal content of the commercial media was significantly higher.
Book Synopsis Removal of Arsenic from Aqueous Wastes Utilizing Iron-treated, Granular Activated Carbon by : Leland Morris Vane
Download or read book Removal of Arsenic from Aqueous Wastes Utilizing Iron-treated, Granular Activated Carbon written by Leland Morris Vane and published by . This book was released on 1987 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adsorptive Iron Removal from Groundwater by : Sharoz Kumar Sharma
Download or read book Adsorptive Iron Removal from Groundwater written by Sharoz Kumar Sharma and published by CRC Press. This book was released on 2021-05-31 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pilot study conducted at the Gilze water treatment plant of Water Supply North West Brabant demonstrated that adsorptive filtration has several potential advantages over floc filtration, namely: longer filter runs due to slower head loss development; better filtrate quality; shorter ripening time; and less backwash water use. In existing groundwater treatment plants, the high iron (II) adsorption capacity of the iron oxide coated filter media makes it potentially possible to switch the governing mode of operation from floc filtration to adsorptive filtration. To achieve this two options can be considered: iron (II) adsorption under anoxic conditions followed by oxidation with oxygen-rich water; and adsorption of iron (II) in the presence of oxygen and simultaneous oxidation. The first option might be attractive specifically when two filtration steps are available.
Book Synopsis Effect of Carbon Type on Arsenic and Trichloroethylene Removal Capacity of Iron (hydr)oxide Nanoparticle Impregnated Granulated Activated Carbon by : Anne Marie Cooper
Download or read book Effect of Carbon Type on Arsenic and Trichloroethylene Removal Capacity of Iron (hydr)oxide Nanoparticle Impregnated Granulated Activated Carbon written by Anne Marie Cooper and published by . This book was released on 2010 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the effect of the virgin granular activated carbon (GAC) on the properties of synthesized iron (hydr)oxide nanoparticles impregnated GAC (Fe-GAC) media and its ability to remove arsenate and organic trichloroethylene (TCE) from water. Fe-GAC media were synthesized from bituminous and lignite-based virgin GAC via three variations of a permanganate/Fe(II) synthesis method. Data obtained from an array of characterization techniques indicated that differences in pore size distribution and surface chemistry of the virgin GAC favor different reaction paths for the iron (hydr)oxide nanoparticles formation. Batch equilibrium isotherm testing (120 g-As/L; 6 mg-TCE/L, 10 mM NaHCO3 at pH = 7.2 ± 0.1 and pH = 8.2 ± 0.1) showed arsenic removal capability was increased as a result of iron (nanoparticles) impregnation, while TCE removal properties were decreased in Fe-GAC media. This tradeoff was displayed by both lignite and bituminous Fe-GAC but was most pronounced in lignite-based Fe-GAC having the highest Fe content (13.4% Fe) which showed the most favorable Freundlich adsorption and intensity parameters for arsenic of Ka = 72.6 (g-As/g-FeGAC)(L/g-As)1/n, 1/n = 0.6; and least favorable adsorption for TCE of Ka = 0.8 (mg-TCE/g-FeGAC)(L/mg-TCE)1/n, 1/n = 4.47. It was concluded that iron content was the main factor contributing to enhanced arsenic removal and that this was affected by base GAC properties such as pore size distribution and surface functional groups. However high Fe content can result in pore blockage; reduction in available adsorption sites for organic co-contaminants; and have a significant effect on the Fe-GACs overall adsorption capacity.
Book Synopsis Arsenic Removal Using Two Pseudomonas Species in Upflow Granular Activated Carbon Columns by : Timothy Todd Heyrend
Download or read book Arsenic Removal Using Two Pseudomonas Species in Upflow Granular Activated Carbon Columns written by Timothy Todd Heyrend and published by . This book was released on 1997 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Arsenic Treatment Technologies for Soil, Waste, and Water by :
Download or read book Arsenic Treatment Technologies for Soil, Waste, and Water written by and published by DIANE Publishing. This book was released on 2002 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adsorption Technology in Water Treatment by : Eckhard Worch
Download or read book Adsorption Technology in Water Treatment written by Eckhard Worch and published by Walter de Gruyter. This book was released on 2012-08-31 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adsorption processes have played a central role in water treatment for many years but their importance is on the rise with the continuous discoveries of new micropollutants in the water cycle (pharmaceuticals for example). In addition to the classical application in drinking water treatment, other application fields are attracting increasing interest, such as wastewater treatment, groundwater remediation, treatment of landfill leachate, and so on. Based on the author's long-term experience in adsorption research, the scientific monograph treats the theoretical fundamentals of adsorption technology for water treatment from a practical perspective. It presents all the basics needed for experimental adsorption studies as well as for process modelling and adsorber design. Topics discussed in the monograph include: introduction into basic concepts and practical applications of adsorption processes; adsorbents and their characterisation, single and multi-solute adsorption equilibria, adsorption kinetics, adsorption dynamics in fixed-bed adsorbers and fixed-bed adsorber design, regeneration and reactivation of adsorbents, introduction into geosorption processes in bank filtration and groundwater recharge. According to the increasing importance of micropollutants in the water cycle, particular attention is paid to their competitive adsorption in presence of background organic matter. Clear illustrations, extensive literature references and a useful index make this work indispensible for both scientists and technicians involved in water treatment.
Book Synopsis Water Reclamation and Sustainability by : Satinder Ahuja
Download or read book Water Reclamation and Sustainability written by Satinder Ahuja and published by Elsevier. This book was released on 2014-05-15 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many hydrological, geochemical, and biological processes associated with water reclamation and reuse are poorly understood. In particular, the occurrence and effects of trace organic and inorganic contaminants commonly found in reclaimed water necessitates careful analysis and treatment prior to safe reuse. Water Reclamation and Sustainability is a practical guide to the latest water reclamation, recycling, and reuse theory and practice. From water quality criteria and regulations to advanced techniques and implementation issues, this book offers scientists a toolkit for developing safe and successful reuse strategies. With a focus on specific contaminant removal techniques, this book comprehensively covers the full range of potential inorganic/organic contaminating compounds and highlights proven remediation methods. Socioeconomic implications related to current and future water shortages are also addressed, underscoring the many positive benefits of sustainable water resource management. - Offers pragmatic solutions to global water shortages - Provides an overview of the latest analytical techniques for water monitoring - Reviews current remediation efforts - Covers innovative technologies for green, gray, brown and black water reclamation and reuse
Book Synopsis Permeable Reactive Barrier by : Ravi Naidu
Download or read book Permeable Reactive Barrier written by Ravi Naidu and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remediation of ground water is complex and often challenging. The passive remediation technology, currently in vogue, is based on permeable reactive barriers (PRB) that allow water to pass through while the fence/barrier made of reactive materials remediates the contaminants. Although PRB has been in operation for over a decade there are limited published books available. This book covers in one single volume all the information needed to plan, design/model and apply a successful, cost-effective and sustainable PRB technology.
Download or read book TECHNEAU written by Christian Kazner and published by IWA Publishing. This book was released on 2009-06-14 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: The best papers from the three-day conference on Safe Drinking Water from Source to Tap June 2009 in Maastricht are published in this book covering the themes of challenges of the water sector and adaptive strategies, treatment, distribution, risk assessment and risk management, sensors and monitoring, small scale systems, simulation, alternative water supply & sources, consumer involvement, and future drinking water. Worldwide, the water supply sector is facing tremendous challenges. Every new emerging contaminants and pathogens and aging infrastructures that are vulnerable for deliberate contamination pose a threat to the quality of water supplies. Shortage of good quality and readily treatable resources is increasing due to global warming, urbanisation and pollution from agriculture and industry. Regulators and consumers are becoming more demanding. Techneau - the largest European project on drinking water - addresses these challenges by developing adaptive supply system options and new and improved treatment and monitoring technologies. Future system options to be studied are flexible, small scale and multi-source supplies, utilising non conventional resources like brackish ground water, treated wastewater and urban groundwater.
Book Synopsis Technologies for Upgrading Existing Or Designing New Drinking Water Treatment Facilities by :
Download or read book Technologies for Upgrading Existing Or Designing New Drinking Water Treatment Facilities written by and published by . This book was released on 1990 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Drinking-water Quality by : World Health Organization
Download or read book Guidelines for Drinking-water Quality written by World Health Organization and published by World Health Organization. This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes the methods used in the surveillance of drinking water quality in the light of the special problems of small-community supplies, particularly in developing countries, and outlines the strategies necessary to ensure that surveillance is effective.
Book Synopsis Carbon-Based Material for Environmental Protection and Remediation by : Mattia Bartoli
Download or read book Carbon-Based Material for Environmental Protection and Remediation written by Mattia Bartoli and published by BoD – Books on Demand. This book was released on 2020-08-19 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon-Based Material for Environmental Protection and Remediation presents an overview of carbon-based technologies and processes, and examines their usefulness and efficiency for environmental preservation and remediation. Chapters cover topics ranging from pollutants removal to new processes in materials science. Written for interested readers with strong scientific and technological backgrounds, this book will appeal to scientific advisors at private companies, academics, and graduate students.
