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| Author | : Abul Hussam |
| Publisher | : |
| Total Pages | : 266 |
| Release | : 2007 |
| Genre | : Arsenic |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2005 |
| Genre | : |
| ISBN | : |
| Author | : Sudhakar Srivastava |
| Publisher | : Springer |
| Total Pages | : 460 |
| Release | : 2019-08-08 |
| Genre | : Technology & Engineering |
| ISBN | : 9811385874 |
Arsenic contamination poses a major environmental problem, especially in Southeast Asian countries like Bangladesh and India. Threatening the health of millions of people due to arsenic’s toxicity and carcinogenicity, the major routes of arsenic exposure for humans are either through drinking water or crops. Rice is the crop most affected by arsenic owing to its cultivation in major arsenic contaminated areas, biogeochemical factors in the soil during rice growth, and specific features of rice that enable it take up more arsenic than other crop plants. This book addresses the problem of arsenic by pursuing a holistic approach. It presents the status quo in different parts of the world (North and South America, Europe, Asia, etc.) and provides essential information on food-related arsenic exposure risks for humans, and possible preventive and curative measures for tackling arsenic poisoning. It covers the arsenic contamination status of rice, rice-based products, other vegetables, fishes, mushrooms, and other foods, with a special focus on rice-arsenic interactions. The mechanisms of arsenic uptake, translocation and distribution in plants and grains are also explained. In closing, the book reviews a variety of prospective agronomic and biotechnological solutions to the problem of arsenic accumulation in rice grains. The book is intended for a broad audience including researchers, scientists, and readers with diverse backgrounds including agriculture, environmental science, food science, environmental management, and human health. It can also be used as an important reference guide for undergraduate and graduate students, university faculties, and environmentalists.
| Author | : Alan H. Welch |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 476 |
| Release | : 2007-05-08 |
| Genre | : Science |
| ISBN | : 0306479567 |
Interest in arsenic in ground water has greatly increased in the past decade because of the increased awareness of human health effects and the costs of avoidance or treatment of ground water supplies used for consumption. The goal of this book is to provide a description of the basic processes that affect arsenic occurrence and transport by providing sufficient background information on arsenic geochemistry and descriptions of hi- arsenic ground water, both affected and unaffected by human activity. An understanding of thermodynamics, adsorption, and the speciation of arsenic in solid phases, which are described in first three chapters, is needed to predict the fate of arsenic in ground water systems. Large-scale and deep movement of ground water can and has redistributed arsenic in the near surface environment, as described in the next two chapters. These large-scale systems can affect large volumes of both ground water and surface water, such as in the Yellowstone system, and can produce mineralised zones that subsequently release arsenic to ground water supplies. Regional identification of high-arsenic ground water and its consumption as described in the next three chapters clearly demonstrates a need for increased wat- quality monitoring, particularly in south and southeast Asia. Chapters 9-11 provide examples of high arsenic ground water associated with sulfide mineral oxidation and alkaline conditions. Finally, smaller scale studies of the effects of human activities that have produced high-arsenic ground water and methods for attenuation of ground water are presented.
| Author | : S. Ohgaki |
| Publisher | : IWA Publishing |
| Total Pages | : 270 |
| Release | : 2005-12-01 |
| Genre | : Science |
| ISBN | : 1843390981 |
Southeast Asia has undergone rapid commercial and industrial development over the past half century, which continues to bring economic stability and prosperity to its inhabitants. The combined impacts of population growth, urbanization, and industrialization continue to put pressure on the natural resources and the environment. At the same time, globalization is another momentous challenge for the region. Southeast Asian megacities are some of the most dynamic and diverse regions, which are playing a key role in achieving global sustainability. Twelve out of nineteen megacities of the world are located in the region, where highly developed areas coexist with poorly developing areas where large economic growth is expected. The poor quality of the living standards of the latter creates many environmental problems that are major threats to the inhabitants of the region. The Southeast Asian environment has been degraded by the release of industrial and domestic wastes, agricultural and aquacultural chemicals, and pollutants from automobiles. It suffers from water-related disasters, Tsunami, floods, typhoons, etc. In order to deal with these issues an integrated approach from the inhibitants, governments and researchers is essential. The environmental threats arising from the increasing population, overuse of natural resources, industrialization, urbanization, and natural disasters present ever increasing challenges to pursuing sustainable development of the region. Many developed countries such as Japan have experiences of dealing with severe environmental pollution and this publication is the result of building an academic network among researchers of related fields from different regions to exchange information. This book will be an invaluable source of information for all those concerned with achieving global sustainability within the water environment in developing regions, including researchers, policy makers, NGOs and NPOs.
| Author | : Weltbank |
| Publisher | : |
| Total Pages | : |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
The detrimental health effects of environmental exposure to arsenic have become increasingly clear in the last few years. High concentrations detected in groundwater from a number of aquifers across the world, including in South and East Asia, have been found responsible for health problems ranging from skin disorders to cardiovascular disease and cancer. The problem has increased greatly in recent years with the growing use of tubewells to tap groundwater for water supply and irrigation. The water delivered by these tubewells has been found in many cases to be contaminated with higher than recommended levels of arsenic. In the study region, countries affected include Bangladesh (the worst affected), India, Myanmar, Nepal, and Pakistan (South Asia); and Cambodia, China (including Taiwan), Lao People's Democratic Republic, and Vietnam (East Asia). This study concentrates on operational responses to arsenic contamination that may be of practical use to actors who invest in water infrastructure in the affected countries, including governments, donors, development banks, and nongovernmental organizations (NGOs).
| Author | : Weltbank |
| Publisher | : |
| Total Pages | : |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
The detrimental health effects of environmental exposure to arsenic have become increasingly clear in the last few years. High concentrations detected in groundwater from a number of aquifers across the world, including in South and East Asia, have been found responsible for health problems ranging from skin disorders to cardiovascular disease and cancer. The problem has increased greatly in recent years with the growing use of tubewells to tap groundwater for water supply and irrigation. The water delivered by these tubewells has been found in many cases to be contaminated with higher than recommended levels of arsenic. In the study region, countries affected include Bangladesh (the worst affected), India, Myanmar, Nepal, and Pakistan (South Asia); and Cambodia, China (including Taiwan), Lao People's Democratic Republic, and Vietnam (East Asia). This study concentrates on operational responses to arsenic contamination that may be of practical use to actors who invest in water infrastructure in the affected countries, including governments, donors, development banks, and nongovernmental organizations (NGOs).
| Author | : Peter Ravenscroft |
| Publisher | : John Wiley & Sons |
| Total Pages | : 625 |
| Release | : 2011-07-26 |
| Genre | : Medical |
| ISBN | : 1444355465 |
Arsenic Pollution summarizes the most current research on the distribution and causes of arsenic pollution, its impact on health and agriculture, and solutions by way of water supply, treatment, and water resource management. Provides the first global and interdisciplinary account of arsenic pollution occurrences Integrates geochemistry, hydrology, agriculture, and water supply and treatment for the first time Options are highlighted for developing alternative water sources and methods for arsenic testing and removal Appeals to specialists in one discipline seeking an overview of the work being done in other disciplines
| Author | : Mason Odell Stahl |
| Publisher | : |
| Total Pages | : 288 |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
Contamination of groundwater with geogenic arsenic is widespread throughout much of South and Southeast Asia and poses a serious health risk to the millions of individuals who consume this water. It is widely agreed that the dominant mechanism of arsenic mobilization is reductive dissolution of arsenic-bearing iron-oxides coupled to the oxidation of organic carbon. However, it is unclear why dissolved arsenic concentrations have reached the high levels currently observed in aquifers throughout the region. In particular, the influence of surface water recharge on arsenic contamination remains unresolved. To address this issue we studied the hydrogeology and geochemistry of two arsenic contaminated sites: one site in Vietnam and another site in Bangladesh. Our field site in Vietnam is located adjacent to the Red River and has been impacted by intensive groundwater pumping for decades. The aquifer now receives net recharge from the river. We conducted a hydrogeologic and geochemical investigation to determine the influence of riverine recharge on groundwater arsenic concentrations. We determined that rates of arsenic mobilization in freshly deposited riverbed sediments are up to 1000 times those of inland aquifer sediments and measured arsenic concentrations in riverbed porewaters that exceeded the aquifer concentrations. We found the effect of riverine recharge is controlled by the geomorphic setting of the river-aquifer interface. Aquifers inland of freshly deposited river reaches are highly contaminated with dissolved arsenic, whereas aquifers inland of non-depositional river reaches host low arsenic groundwater. At our Bangladesh field site the aquifer has been impacted by the construction of man-made ponds, which provide 40% of aquifer recharge. To investigate the role of ponds on groundwater arsenic levels we constructed and instrumented a pond, installed a network of 100 wells, performed laboratory experiments, and collected sediment and water samples over three years. Our characterization of the pond physical hydrology and the pond and aquifer geochemistry reveals that arsenic mobilization within the aquifer is primarily driven by sedimentary organic matter. While ponds contribute substantial aquifer recharge our results suggest that high arsenic concentrations in Bangladesh are not driven by surface water recharge and likely emerged prior to anthropogenic perturbations to the hydrology.
| Author | : Sudhakar Srivastava |
| Publisher | : |
| Total Pages | : 460 |
| Release | : 2020 |
| Genre | : Food |
| ISBN | : 9789811385889 |
Arsenic contamination poses a major environmental problem, especially in Southeast Asian countries like Bangladesh and India. Threatening the health of millions of people due to arsenics toxicity and carcinogenicity, the major routes of arsenic exposure for humans are either through drinking water or crops. Rice is the crop most affected by arsenic owing to its cultivation in major arsenic contaminated areas, biogeochemical factors in the soil during rice growth, and specific features of rice that enable it take up more arsenic than other crop plants. This book addresses the problem of arsenic by pursuing a holistic approach. It presents the status quo in different parts of the world (North and South America, Europe, Asia, etc.) and provides essential information on food-related arsenic exposure risks for humans, and possible preventive and curative measures for tackling arsenic poisoning. It covers the arsenic contamination status of rice, rice-based products, other vegetables, fishes, mushrooms, and other foods, with a special focus on rice-arsenic interactions. The mechanisms of arsenic uptake, translocation and distribution in plants and grains are also explained. In closing, the book reviews a variety of prospective agronomic and biotechnological solutions to the problem of arsenic accumulation in rice grains. The book is intended for a broad audience including researchers, scientists, and readers with diverse backgrounds including agriculture, environmental science, food science, environmental management, and human health. It can also be used as an important reference guide for undergraduate and graduate students, university faculties, and environmentalists.
