Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options

Although arsenic is naturally present in the environment, 99% of human exposure to arsenic is through ingestion. Throughout history, arsenic is known as “the king of poisons”; it is mutagenic, carcinogenic, and teratogenic. Even in smaller concentrations, it accumulates in the body and takes decad...

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Main Author: Ly, Thuy M
Format: Others
Published: Scholarship @ Claremont 2012
Subjects:
Online Access:http://scholarship.claremont.edu/pomona_theses/41
http://scholarship.claremont.edu/cgi/viewcontent.cgi?article=1041&context=pomona_theses
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spelling ndltd-CLAREMONT-oai-scholarship.claremont.edu-pomona_theses-10412013-04-19T14:37:44Z Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options Ly, Thuy M Although arsenic is naturally present in the environment, 99% of human exposure to arsenic is through ingestion. Throughout history, arsenic is known as “the king of poisons”; it is mutagenic, carcinogenic, and teratogenic. Even in smaller concentrations, it accumulates in the body and takes decades before any physical symptoms of arsenic poisoning shows. According to the World Health Organization (WHO), the safe concentration of arsenic in drinking water is 10 µg/L. However, this limit is often times ignored until it is decades too late and people begin showing symptoms of having been poisoned. This is the current situation for Vietnam, whose legal arsenic concentration limit is 50 µg/L, five times higher than the WHO guidelines. Groundwater in Vietnam was already naturally high in arsenic due to arsenic-rich soils releasing arsenic into groundwater. Then, in the past half century, with the use of arsenic-laden herbicides dispersed during the Vietnam War and subsequent industrial developments, the levels of bio-available arsenicals has dangerously spiked. With the proliferation of government-subsidized shallow tube-wells in the past two decades, shallow groundwater has become the primary source for drinking and irrigation water in Vietnam. This is a frightening trend, because this groundwater has arsenic concentrations up to 3050 µg/L, primarily in the +3 and +5 oxidation states, the most readily available oxidation states for bioaccumulation. This thesis argues that measures must be taken immediately to remedy the high concentration of arsenic in groundwater, which in Vietnam is the primary and, in some cases, the sole source of water for domestic consumption and agricultural production. Although there are numerous technologies available for treating arsenic in groundwater, not all of them are suited for Vietnam. By analyzing the historical, cultural, economic, and political parameters of Vietnam, several optimal treatments of groundwater for drinking water emerged as most recommended, a classification that is based on their local suitability, social acceptability, financial feasibility, and governmental support. Further research on irrigation water treatment is proposed due to the need for sustainable crop production, the safe ingestion of rice and vegetables, and the continued growth of Vietnam’s economy, which is heavily dependent on agriculture. 2012-05-01 text application/pdf http://scholarship.claremont.edu/pomona_theses/41 http://scholarship.claremont.edu/cgi/viewcontent.cgi?article=1041&context=pomona_theses © 2011 Thuy M. Ly Pomona Senior Theses Scholarship @ Claremont Arsenic Vietnam Vietnam War Treatment Agricultural and Resource Economics Environmental Chemistry Environmental Health Environmental Health and Protection Environmental Indicators and Impact Assessment Environmental Monitoring Environmental Public Health Health Economics Inorganic Chemicals International Public Health Natural Resources Management and Policy Physical and Environmental Geography Science and Technology Studies Sustainability Toxicology Water Resource Management
collection NDLTD
format Others
sources NDLTD
topic Arsenic
Vietnam
Vietnam War
Treatment
Agricultural and Resource Economics
Environmental Chemistry
Environmental Health
Environmental Health and Protection
Environmental Indicators and Impact Assessment
Environmental Monitoring
Environmental Public Health
Health Economics
Inorganic Chemicals
International Public Health
Natural Resources Management and Policy
Physical and Environmental Geography
Science and Technology Studies
Sustainability
Toxicology
Water Resource Management
spellingShingle Arsenic
Vietnam
Vietnam War
Treatment
Agricultural and Resource Economics
Environmental Chemistry
Environmental Health
Environmental Health and Protection
Environmental Indicators and Impact Assessment
Environmental Monitoring
Environmental Public Health
Health Economics
Inorganic Chemicals
International Public Health
Natural Resources Management and Policy
Physical and Environmental Geography
Science and Technology Studies
Sustainability
Toxicology
Water Resource Management
Ly, Thuy M
Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options
description Although arsenic is naturally present in the environment, 99% of human exposure to arsenic is through ingestion. Throughout history, arsenic is known as “the king of poisons”; it is mutagenic, carcinogenic, and teratogenic. Even in smaller concentrations, it accumulates in the body and takes decades before any physical symptoms of arsenic poisoning shows. According to the World Health Organization (WHO), the safe concentration of arsenic in drinking water is 10 µg/L. However, this limit is often times ignored until it is decades too late and people begin showing symptoms of having been poisoned. This is the current situation for Vietnam, whose legal arsenic concentration limit is 50 µg/L, five times higher than the WHO guidelines. Groundwater in Vietnam was already naturally high in arsenic due to arsenic-rich soils releasing arsenic into groundwater. Then, in the past half century, with the use of arsenic-laden herbicides dispersed during the Vietnam War and subsequent industrial developments, the levels of bio-available arsenicals has dangerously spiked. With the proliferation of government-subsidized shallow tube-wells in the past two decades, shallow groundwater has become the primary source for drinking and irrigation water in Vietnam. This is a frightening trend, because this groundwater has arsenic concentrations up to 3050 µg/L, primarily in the +3 and +5 oxidation states, the most readily available oxidation states for bioaccumulation. This thesis argues that measures must be taken immediately to remedy the high concentration of arsenic in groundwater, which in Vietnam is the primary and, in some cases, the sole source of water for domestic consumption and agricultural production. Although there are numerous technologies available for treating arsenic in groundwater, not all of them are suited for Vietnam. By analyzing the historical, cultural, economic, and political parameters of Vietnam, several optimal treatments of groundwater for drinking water emerged as most recommended, a classification that is based on their local suitability, social acceptability, financial feasibility, and governmental support. Further research on irrigation water treatment is proposed due to the need for sustainable crop production, the safe ingestion of rice and vegetables, and the continued growth of Vietnam’s economy, which is heavily dependent on agriculture.
author Ly, Thuy M
author_facet Ly, Thuy M
author_sort Ly, Thuy M
title Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options
title_short Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options
title_full Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options
title_fullStr Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options
title_full_unstemmed Arsenic Contamination in Groundwater in Vietnam: An Overview and Analysis of the Historical, Cultural, Economic, and Political Parameters in the Success of Various Mitigation Options
title_sort arsenic contamination in groundwater in vietnam: an overview and analysis of the historical, cultural, economic, and political parameters in the success of various mitigation options
publisher Scholarship @ Claremont
publishDate 2012
url http://scholarship.claremont.edu/pomona_theses/41
http://scholarship.claremont.edu/cgi/viewcontent.cgi?article=1041&context=pomona_theses
work_keys_str_mv AT lythuym arseniccontaminationingroundwaterinvietnamanoverviewandanalysisofthehistoricalculturaleconomicandpoliticalparametersinthesuccessofvariousmitigationoptions
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