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Enhanced Column Filtration For Arsenic Removal From Water
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Book Synopsis Enhanced Column Filtration for Arsenic Removal from Water by : Calvin Chia-Hung Cheng
Download or read book Enhanced Column Filtration for Arsenic Removal from Water written by Calvin Chia-Hung Cheng and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Arsenic is ubiquitous in water sources around the world and is highly toxic. While precipitation and membrane filtration techniques are successfully implemented in developed cities, they are unsuitable for rural and low-resource settings lacking centralized facilities. This thesis presents the use of ultra-small iron oxide (Fe2O3) nanoparticles functionalized on sand granules for use as a house-hold scale adsorption filter. Water-stable Îą-Fe2O3 (hematite) nanoparticles (
Book Synopsis Factors Influencing Arsenic Removal from Drinking Water by the Process of Coagulant Enhanced Microfiltration by : Michael Alan Brewer
Download or read book Factors Influencing Arsenic Removal from Drinking Water by the Process of Coagulant Enhanced Microfiltration written by Michael Alan Brewer and published by . This book was released on 1998 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Pilot Scale Study of Polyelectrolyte-enhanced Ultrafiltration for Arsenic Removal by : Daniel Gallo
Download or read book Pilot Scale Study of Polyelectrolyte-enhanced Ultrafiltration for Arsenic Removal written by Daniel Gallo and published by . This book was released on 2004 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovative Materials and Methods for Water Treatment by : Marek Bryjak
Download or read book Innovative Materials and Methods for Water Treatment written by Marek Bryjak and published by CRC Press. This book was released on 2016-02-17 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to increasing demand for potable and irrigation water, water suppliers have to use alternative resources. They either have to regenerate wastewater or deal with contaminated surface water. This book brings together the experiences of various experts in preparing of innovative materials that are selective for arsenic and chromium removal, and in
Book Synopsis Implementation of Arsenic Treatment Systems: Design considerations, operation and maintenance by : T. David Chinn
Download or read book Implementation of Arsenic Treatment Systems: Design considerations, operation and maintenance written by T. David Chinn and published by American Water Works Association. This book was released on 2002 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhanced Coagulation and Utilization of Electrotechnologies for Arsenic Removal in Water Treatment by : Syed R. Qasim
Download or read book Enhanced Coagulation and Utilization of Electrotechnologies for Arsenic Removal in Water Treatment written by Syed R. Qasim and published by . This book was released on 1996* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Arsenic (III) and Arsenic (V) Removal from Drinking Water in San Ysidro, New Mexico by : Dennis A. Clifford
Download or read book Arsenic (III) and Arsenic (V) Removal from Drinking Water in San Ysidro, New Mexico written by Dennis A. Clifford and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Arsenic Removal from Drinking Water by Enhanced Coagulation by : Guang Zhu
Download or read book Arsenic Removal from Drinking Water by Enhanced Coagulation written by Guang Zhu and published by . This book was released on 1996 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Arsenic removal from drinking water by coagulation/filtration and lime softening plants by :
Download or read book Arsenic removal from drinking water by coagulation/filtration and lime softening plants written by and published by DIANE Publishing. This book was released on with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Implementation of Arsenic Treatment Systems: Process selection by : Zaid K. Chowdhury
Download or read book Implementation of Arsenic Treatment Systems: Process selection written by Zaid K. Chowdhury and published by American Water Works Association. This book was released on 2002 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Removal of Arsenic in Drinking Water by :
Download or read book Removal of Arsenic in Drinking Water written by and published by DIANE Publishing. This book was released on 2005 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Arsenic Removal by Enhanced Coagulation and Membrane Processes by : Janet G. Hering
Download or read book Arsenic Removal by Enhanced Coagulation and Membrane Processes written by Janet G. Hering and published by Amer Water Works Assn. This book was released on 1996-01-01 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Treatment of Arsenic Contaminated Groundwater Using Oxidation and Membrane Filtration [electronic Resource] by : Moore, Kenneth
Download or read book Treatment of Arsenic Contaminated Groundwater Using Oxidation and Membrane Filtration [electronic Resource] written by Moore, Kenneth and published by University of Waterloo. This book was released on 2005 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arsenic is a known carcinogen, causing cancers of the skin, lungs, bladder and kidney. Current research suggests that drinking water is the most common pathway for long-term low dose exposure. Arsenic contaminated drinking water has caused serious health problems in many countries including: India, Bangladesh, Argentina, Chile, Taiwan, the United States and Canada. Nanofiltration (NF) is a promising technology for arsenic removal since it requires less energy than traditional reverse osmosis membranes. Several studies have shown that nanofiltration is capable of removing the oxidized form of arsenic [As(V)] while the reduced form of arsenic [As(III)] is poorly removed. To exploit this difference it has been suggested that a pretreatment step which oxidizes the As(III) to As(V) would improve the performance of membrane filtration, but this has never been demonstrated. The research had three objectives: The first was to investigate the ability of NF membranes to treat arsenic contaminated groundwater and evaluate the influence of the membrane type and operating conditions. Secondly, the effectiveness of a solid phase oxidizing media (MnO2) to oxidize arsenite to arsenate was investigated. Lastly, the MnO2 was combined with NF membrane filtration to determine the benefit, if any, of oxidizing the arsenic prior to membrane filtration. A pilot membrane system was installed to treat a naturally contaminated groundwater in Virden, Manitoba, Canada. The groundwater in Virden contains between 38 and 44 [mu]g/L of arsenic, primarily made up of As(III), with little particulate arsenic. In the first experiment three Filmtec® membranes were investigated: NF270, NF90 and XLE. Under all conditions tested the NF90 and NF270 membranes provided insufficient treatment of Virden's groundwater to meet Canada's recommended Interim Maximum Acceptable Concentration (IMAC) of 25 [mu]g/L. The XLE membrane provided better arsenic removal and under the conditions of 25 Lmh flux and 70% recovery produced treated water with a total arsenic concentration of 21 [mu]g/L. The XLE membrane is therefore able to sufficiently treat Virden's ground water. However treatment with the XLE membrane alone is insufficient to meet the USEPA's regulation of 10 [mu]g/L or Canada's proposed Maximum Allowable Concentration (MAC) of 5 [mu]g/L. The effects of recovery and flux on total arsenic passage are consistent with accepted membrane theory. Increasing the flux increases the flow of pure water through the membrane; decreasing the overall passage of arsenic. Increasing the recovery increases the bulk concentration of arsenic, which leads to higher arsenic passage. The second experiment investigated the arsenic oxidation capabilities of manganese dioxide (MnO2) and the rate at which the oxidation occurs. The feed water contained primarily As(III), however, when filtered by MnO2 at an Empty Bed Contact Time (EBCT) of only 1 minute, the dominant form of arsenic was the oxidized form [As(V)]. At an EBCT of 2 minutes the oxidation was nearly complete with the majority of the arsenic in the As(V) form. Little arsenic was removed by the MnO2 filter. The third and final experiment investigated the benefit, if any, to combining the membrane filtration and MnO2 treatment investigated in the first and second experiments. The effect of MnO2 pretreatment was dramatic. In Experiment I, the NF270 and NF90 membranes were unable to remove any arsenic while the XLE removed, at best, approximately 50% of the arsenic. Once pretreated with MnO2 the passage of arsenic through all of the membranes dropped to less than 4 [mu]g/L, corresponding to approximately 91% to 98% removal. The dramatic improvement in arsenic removal can be attributed to charge. All three membranes are negatively charged. Through a charge exclusion effect the rejection of negatively charged ions is enhanced. During the first experiment, As(III) (which is neutrally charged) was the dominant form of arsenic, and was uninfluenced by the negative charge of the membrane. Once oxidized to As(V), the arsenic had a charge of -2, and was electrostatically repelled by the membrane. This greatly improved the arsenic rejection characteristics of the membrane. Nanofiltration alone is not a suitable technology to remove arsenic contaminated waters where As(III) is the dominant species. When combined with MnO2 pre-oxidation, the arsenic rejection performance of nanofiltration is dramatically improved.
Book Synopsis Arsenic (III) Oxidation and Removal from Drinking Water by : Phyllis Frank
Download or read book Arsenic (III) Oxidation and Removal from Drinking Water written by Phyllis Frank and published by . This book was released on 1986 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Demonstration of Emerging Technologies for Arsenic Removal: Pilot testing by : Yu-Jung Chang
Download or read book Demonstration of Emerging Technologies for Arsenic Removal: Pilot testing written by Yu-Jung Chang and published by American Water Works Association. This book was released on 2005 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second of two volumes that presents the results of a cooperative research effort between industry, academia, utilities to evaluate and demonstrate the treatment effectiveness of a wide range of technologies for arsenic removal. (Volume 1; ISBN: 1-58321-310-4; published Feb 2004) This volume focused on larger-scale in-situ demonstration testing of the major technologies reviewed in Volume 1, plus several additional technologies. Objectives were to describe the underlying chemical and physical controls over arsenic removal, consider the operational performance parameters and anticipate where improvements might occur. Sponsored by Arsenic Research Partnership, AWWRF, USEPA, and ACWA.
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 Groundwater Arsenic Remediation by : Parimal Pal
Download or read book Groundwater Arsenic Remediation written by Parimal Pal and published by Butterworth-Heinemann. This book was released on 2015-05-15 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arsenic abatement from groundwater in locations with a central water distribution system is relatively simple. The real challenge is selecting the most effective and affordable treatment and scale up option for locations which lack the appropriate infrastructure. Groundwater Arsenic Remediation: Treatment Technology and Scale UP provides the latest breakthrough groundwater treatment technologies and modeling and simulation methods for project scale up and eventually field deployment in locations which lack the proper central water distribution system to ensure arsenic free groundwater. - Covers the different removal methods, such as chemical, adsorption, separation by membranes, and membrane distillation - Includes the state-of-the-art modeling & simulation methods for optimization and field deployment - Provides economic and comparative analysis of each arsenic treatment technology