June 18, 2021

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Groundwater Arsenic Remediation

Groundwater Arsenic Remediation
Author : Parimal Pal
Publisher : Butterworth-Heinemann
Release Date : 2015-05-15
Category : Technology & Engineering
Total pages :326
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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

Arsenic in Soil and Groundwater Environment

Arsenic in Soil and Groundwater Environment
Author : Prosun Bhattacharya,Arun B. B. Mukherjee,Jochen Bundschuh,Ron Zevenhoven,Richard H. Loeppert
Publisher : Elsevier
Release Date : 2007-06-29
Category : Technology & Engineering
Total pages :684
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This volume presents the recent developments in the field of arsenic in soil and groundwater. Arranged into nine sections, the text emphasizes the global occurrences of arsenic in the environment, particularly on its source, pathways, behavior, and effects it has on soils, plants, water, animals, and humans. It also covers the diverse issues of arsenic in the mining environment, arsenic emanating from hydrothermal springs, and the geochemical modeling of arsenic adsorption to oxide surfaces. Finally, the text includes different cost effective removal mechanisms of arsenic from drinking water using natural red earth, solar oxidation, and arsenic oxidation by ferrrate. Written in simple English, and few technical terms, the book is designed to create interest within the countries with occurrences of arsenic in drinking water with · an update the current status of knowledge on the dynamics of natural arsenic from the aquifers through groundwater to food chain and efficient techniques for arsenic removal. · serve as a standard text book for graduate, postgraduate students and researchers in the field of Environmental Sciences and Hydrogeochemistry as well as researchers, environmental scientists and chemists, toxicologists, medical scientists and even for general public seeking an in-depth view of arsenic which had been classed as a carcinogen. · bring awareness, among administrators, policy makers and company executives, on the problem and to improve the international cooperation

Arsenic Contamination of Groundwater

Arsenic Contamination of Groundwater
Author : Satinder Ahuja
Publisher : John Wiley & Sons
Release Date : 2008-10-03
Category : Science
Total pages :418
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Provides a viable reference, describing the state-of-knowledge on sources of arsenic contamination in ground water, which affects about 100 million people worldwide. With contributions from world-renowned experts in the field, this book explores developments in the transport kinetics, detection, measurement, seasonal cycling, accumulation, geochemistry, removal, and toxicology of arsenic. Includes compelling case studies describing how arsenic contamination occurs and the devastating effects on the people and environment affected by it.

Best Practice Guide on the Control of Arsenic in Drinking Water

Best Practice Guide on the Control of Arsenic in Drinking Water
Author : Prosun Bhattacharya,David Polya,Dragana Jovanovic
Publisher : IWA Publishing
Release Date : 2017-07-15
Category : Science
Total pages :300
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Arsenic in drinking water derived from groundwater is arguably the biggest environmental chemical human health risk known at the present time, with well over 100,000,000 people around the world being exposed. Monitoring the hazard, assessing exposure and health risks and implementing effective remediation are therefore key tasks for organisations and individuals with responsibilities related to the supply of safe, clean drinking water. Best Practice Guide on the Control of Arsenic in Drinking Water, covering aspects of hazard distribution, exposure, health impacts, biomonitoring and remediation, including social and economic issues, is therefore a very timely contribution to disseminating useful knowledge in this area. The volume contains 10 short reviews of key aspects of this issue, supplemented by a further 14 case studies, each of which focusses on a particular area or technological or other practice, and written by leading experts in the field. Detailed selective reference lists provide pointers to more detailed guidance on relevant practice. The volume includes coverage of (i) arsenic hazard in groundwater and exposure routes to humans, including case studies in USA, SE Asia and UK; (ii) health impacts arising from exposure to arsenic in drinking water and biomonitoring approaches; (iii) developments in the nature of regulation of arsenic in drinking water; (iv) sampling and monitoring of arsenic, including novel methodologies; (v) approaches to remediation, particularly in the context of water safety planning, and including case studies from the USA, Italy, Poland and Bangladesh; and (vi) socio-economic aspects of remediation, including non-market valuation methods and local community engagement.

Groundwater Arsenic Remediation

Groundwater Arsenic Remediation
Author : Parimal Pal
Publisher : Unknown
Release Date : 2015-03-15
Category :
Total pages :368
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Groundwater Arsenic Remediation: Treatment Technology and Scale UP provides the latest breakthrough groundwater treatment technologies and modelling 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.

In Situ Iron Oxide Emplacement for Groundwater Arsenic Remediation

In Situ Iron Oxide Emplacement for Groundwater Arsenic Remediation
Author : Thomas Sunday Abia
Publisher : Unknown
Release Date : 2012
Category :
Total pages :129
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Iron oxide-bearing minerals have long been recognized as an effective reactive media for arsenic-contaminated groundwater remediation. This research aimed to develop a technique that could facilitate in situ oxidative precipitation of Fe3+ in a soil (sand) media for generating a subsurface iron oxide-based reactive barrier that could immobilize arsenic (As) and other dissolved metals in groundwater. A simple in situ arsenic treatment process was successfully developed for treating contaminated rural groundwater using iron oxide-coated sand (IOCS). Using imbibition flow, the system facilitated the dispersive transport of ferrous iron (Fe2+) and oxidant solutions in porous sand to generate an overlaying blanket where the Fe2+ was oxidized and precipitated onto the surface as ferric oxide. The iron oxide (FeOx) emplacement process was significantly affected by (1) the initial surface area and surface-bound iron content of the sand, (2) the pH and solubility of the coating reagents, (3) the stability of the oxidant solution, and (4) the chemical injection schedule. In contrast to conventional excavate-and-fill treatment technologies, this technique could be used to in situ replace a fresh iron oxide blanket on the sand and rejuvenate its treatment capacity for additional arsenic removal. Several bench-scale experiments revealed that the resultant IOCS could treat arsenic-laden groundwater for extended periods of time before approaching its effective life cycle. The adsorption capacity for As(III) and As(V) was influenced by (1) the amount of iron oxide accumulated on the sand surface, (2) the system pH, and (3) competition for adsorption sites from other groundwater constituents such as silicon (Si) and total dissolved solids (TDS). Although the IOCS could be replenished several times before exhaustion, the life cycle of the FeOx reactive barrier may be limited by the gradual loss of hydraulic conductivity induced by the imminent reduction of pore space over time.

In-Situ Remediation of Arsenic-Contaminated Sites

In-Situ Remediation of Arsenic-Contaminated Sites
Author : Jochen Bundschuh,Hartmut M. Holländer,Lena Qiying Ma
Publisher : CRC Press
Release Date : 2018-10-30
Category : Nature
Total pages :208
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Providing an introduction, the scientific background, case studies and future perspectives of in-situ arsenic remediation technologies for soils, soil water and groundwater at geogenic and anthropogenic contaminated sites. The case studies present in-situ technologies about natural arsenic, specifically arsenate and arsenite, but also about organic arsenic compounds. This work covers geochemical, microbiological and plant ecological solutions for arsenic remediation. It will serve as a standard textbook for (post-)graduate students and researchers in the field of Environmental Sciences and Hydrogeochemistry as well as researchers, engineers, environmental scientists and chemists, toxicologists, medical scientists and even for general public seeking an in-depth view of arsenic which had been classed as a carcinogen. This book aims to stimulate awareness among administrators, policy makers and company executives of in-situ remediation technologies at sites contamined by arsenic and to improve the international cooperation on the subject.

Arsenic Removal from Contaminated Groundwater

Arsenic Removal from Contaminated Groundwater
Author : Sirshendu De,Abhijit Maiti
Publisher : The Energy and Resources Institute (TERI)
Release Date : 2012-01-01
Category : Technology & Engineering
Total pages :304
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Contamination of groundwater with arsenic is being considered a pervasive and critical issue in recent years. Large areas in India, Bangladesh, South East Asia, and other parts of the world are suffering from this problem. Arsenic Removal from Contaminated Groundwater presents a comprehensive discussion on various important issues, including state-of-the-art arsenic removal technologies, preparation and performance analysis of laterite, and scale-up issues and design of a household filter. It also expounds the potentiality of raw laterite and treated laterite as low-cost arsenic adsorbents. The efficiency of adsorbent capacity is evaluated using real arsenic contaminated groundwater collected from an affected area in West Bengal, India. The topic is an emerging area and most of the work presented has the potential of field application.

Reviews of Environmental Contamination Volume 197

Reviews of Environmental Contamination Volume 197
Author : Hemda Garelick,Huw Jones
Publisher : Springer Science & Business Media
Release Date : 2008-12-10
Category : Science
Total pages :194
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Reviews of Environmental Contamination and Toxicology attempts to provide concise, critical reviews of timely advances, philosophy and significant areas of accomplished or needed endeavor in the total field of xenobiotics, in any segment of the environment, as well as toxicological implications.

Special Issue: Groundwater Arsenic

Special Issue: Groundwater Arsenic
Author : Jochen Bundschuh
Publisher : Unknown
Release Date : 2010
Category :
Total pages :335
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Electrochemical Remediation of Arsenic-Contaminated Groundwater -- Results of Prototype Field Tests in Bangladesh

Electrochemical Remediation of Arsenic-Contaminated Groundwater -- Results of Prototype Field Tests in Bangladesh
Author : Anonim
Publisher : Unknown
Release Date : 2009
Category :
Total pages :129
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According to the World Health Organization (WHO), more than 50 million people in Bangladesh drink arsenic-laden water, making it the largest case of mass poisoning in human history. Many methods of arsenic removal (mostly using chemical adsorbents) have been studied, but most of these are too expensive and impractical to be implemented in poor countries such as Bangladesh. This project investigates ElectroChemical Arsenic Remediation (ECAR) as an affordable means of removing arsenic. Experiments were performed on site in Bangladesh using a prototype termed "sushi". This device consists of carbon steel sheets that serve as electrodes wrapped into a cylinder, separated by plastic mesh and surrounded by a tube-like container that serves as a holding cell in which the water is treated electrochemically. During the electrochemical process, current is applied to both electrodes causing iron to oxidize to various forms of iron (hydr)oxides. These species bind to arsenic(V) with very high affi nity. ECAR also has the advantage that As(III), the more toxic form of arsenic, oxidizes to As(V) in situ. Only As(V) is known to complex with iron (hydr)oxides. One of the main objectives of this research is to demonstrate the ability of the new prototype to reduce arsenic concentrations in Bangladesh groundwater from>200 ppb to below the WHO limit of 10 ppb. In addition, varying fl ow rate and dosage and the effect on arsenic removal was investigated. Experiments showed that ECAR reduced Bangladeshi water with an initial arsenic concentration as high as 250 ppb to below 10 ppb. ECAR proved to be effective at dosages as high as 810 Coulombs/Liter (C/L) and as low as 386 C/L (current 1 A, voltage 12 V). These results are encouraging and provide great promise that ECAR is an effi cient method in the remediation of arsenic from contaminated groundwater. A preliminary investigation of arsenic removal trends with varying Coulombic dosage, complexation time and fi ltration methods is also presented.

Arsenic Remediation of Drinking Water Using Iron-oxide Coated Coal Bottom Ash

Arsenic Remediation of Drinking Water Using Iron-oxide Coated Coal Bottom Ash
Author : Anonim
Publisher : Unknown
Release Date : 2010
Category :
Total pages :1446
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We describe laboratory and field results of a novel arsenic removal adsorbent called 'Arsenic Removal Using Bottom Ash' (ARUBA). ARUBA is prepared by coating particles of coal bottom ash, a waste material from coal fired power plants, with iron (hydr)oxide. The coating process is simple and conducted at room temperature and atmospheric pressure. Material costs for ARUBA are estimated to be low (~;;$0.08 per kg) and arsenic remediation with ARUBA has the potential to be affordable to resource-constrained communities. ARUBA is used for removing arsenic via a dispersal-and-removal process, and we envision that ARUBA would be used in community-scale water treatment centers. We show that ARUBA is able to reduce arsenic concentrations in contaminated Bangladesh groundwater to below the Bangladesh standard of 50 ppb. Using the Langmuir isotherm (R2 = 0.77) ARUBA's adsorption capacity in treating real groundwater is 2.6x10-6 mol/g (0.20 mg/g). Time-to-90percent (defined as the time interval for ARUBA to remove 90percent of the total amount of arsenic that is removed at equilibrium) is less than one hour. Reaction rates (pseudo-second-order kinetic model, R2>_ 0.99) increase from 2.4x105 to 7.2x105 g mol-1 min-1 as the groundwater arsenic concentration decreases from 560 to 170 ppb. We show that ARUBA's arsenic adsorption density (AAD), defined as the milligrams of arsenic removed at equilibrium per gram of ARUBA added, is linearly dependent on the initial arsenic concentration of the groundwater sample, for initial arsenic concentrations of up to 1600 ppb and an ARUBA dose of 4.0 g/L. This makes it easy to determine the amount of ARUBA required to treat a groundwater source when its arsenic concentration is known and less than 1600 ppb. Storing contaminated groundwater for two to three days before treatment is seen to significantly increase ARUBA's AAD. ARUBA can be separated from treated water by coagulation and clarification, which is expected to be less expensive than filtration of micron-scale particles, further contributing to the affordability of a community-scale water treatment center.

Socio-Economic Analysis of Arsenic Contamination of Groundwater in West Bengal

Socio-Economic Analysis of Arsenic Contamination of Groundwater in West Bengal
Author : Abhijit Das,Joyashree Roy,Sayantan Chakrabarti
Publisher : Springer
Release Date : 2016-03-02
Category : Business & Economics
Total pages :136
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This book presents a socio-economic analysis of the issues linking technological innovation in providing arsenic-safe drinking water in rural areas. It presents concrete field based experiences of experiments and case studies depicting the plight and sufferings of people due to failed technological deployment strategies over the past two decades in West Bengal, the most arsenic-exposed state in India and also the first to act for remediation of the crisis. One of the greatest challenges in arsenic-exposed zones is to provide sustainable access to reliably arsenic-safe free water. For nearly twenty years the Government of India and national water distribution institutions in collaboration with multi-lateral funding agencies have sought to pump in money, push technology collected through global tenders, and enlist the support of non-governmental organizations (NGOs), but their efforts have yielded little success. This book is the outcome of the authors’ intensive fieldwork, guided by the conceptual framework of the latest literature on environmental economics and consumer behaviour. It presents a framework and estimates based on field level primary data. Secondary official source-based data are also collated from various scattered sources into a valuable, comprehensive collection. Lastly, the book includes a revealing analysis of factors affecting households’ participation.

Natural Arsenic in Groundwater

Natural Arsenic in Groundwater
Author : J. Bundschuh,P. Bhattacharya,D. Chandrasekharam
Publisher : CRC Press
Release Date : 2005-01-06
Category : Technology & Engineering
Total pages :356
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Arsenic contamination has become a global phenomenon. With the development of advanced technological detection tools, more geographical areas have been identified. The people most affected are those in the poorer socio-economic groups. The research articles in this book have been contributed by scientists working in areas severely a

ELECTROCHEMICAL REMEDIATION OF ARSENIC-CONTAMINATED GROUNDWATER {u2014} RESULTS OF PROTOTYPE FIELD TESTS IN BANGLADESH.

ELECTROCHEMICAL REMEDIATION OF ARSENIC-CONTAMINATED GROUNDWATER {u2014} RESULTS OF PROTOTYPE FIELD TESTS IN BANGLADESH.
Author : Anonim
Publisher : Unknown
Release Date : 2009
Category :
Total pages :129
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According to the World Health Organization (WHO), more than 50 million people in Bangladesh drink arsenic-laden water, making it the largest case of mass poisoning in human history. Many methods of arsenic removal (mostly using chemical adsorbents) have been studied, but most of these are too expensive and impractical to be implemented in poor countries such as Bangladesh. This project investigates ElectroChemical Arsenic Remediation (ECAR) as an affordable means of removing arsenic. Experiments were performed on site in Bangladesh using a prototype termed ?sushi?. This device consists of carbon steel sheets that serve as electrodes wrapped into a cylinder, separated by plastic mesh and surrounded by a tube-like container that serves as a holding cell in which the water is treated electrochemically. During the electrochemical process, current is applied to both electrodes causing iron to oxidize to various forms of iron (hydr)oxides. These species bind to arsenic(V) with very high affi nity. ECAR also has the advantage that As(III), the more toxic form of arsenic, oxidizes to As(V) in situ. Only As(V) is known to complex with iron (hydr)oxides. One of the main objectives of this research is to demonstrate the ability of the new prototype to reduce arsenic concentrations in Bangladesh groundwater from >200 ppb to below the WHO limit of 10 ppb. In addition, varying fl ow rate and dosage and the effect on arsenic removal was investigated. Experiments showed that ECAR reduced Bangladeshi water with an initial arsenic concentration as high as 250 ppb to below 10 ppb. ECAR proved to be effective at dosages as high as 810 Coulombs/Liter (C/L) and as low as 386 C/L (current 1 A, voltage 12 V). These results are encouraging and provide great promise that ECAR is an effi cient method in the remediation of arsenic from contaminated groundwater. A preliminary investigation of arsenic removal trends with varying Coulombic dosage, complexation time and fi ltration methods is also presented.