Arsenic Mitigation Research Articles

Socio-economic Impacts on Human Life in Arsenic Affected Area of Basti Rasul Pur, Rahim Yar Khan, Pakistan

<p>The availability and scarcity of both surface and ground water alongwith adverse impacts of contaminated water have become major problems in Pakistan. Groundwater arsenic contamination in the southern part of the country has exponentially endangered the human life and complicated the efforts to provide safe drinking water in the arsenic contaminated areas. To gauge the adverse impacts amongst the affected population, household survey in Basti Rasul Pur district Rahim Yar Khan was conducted on core socio-economic indicators such as household conditions, sex ratio, earning sources, literacy, health morbidity, water borne diseases, drinking water contamination, education, employment and unemployment, expenditure on hospitalization for drawing best possible conclusions. Resultantly, sex ratio observed was about 1.01% for adults and 9.8 % for children. A total of 77 % water samples were found with arsenic contamination, due to which 50 % people were found with arsencosis symptoms and 60% of their earnings were being spent on hospitalization. Due to poverty and illiteracy, the entire population was un-aware of the adverse impacts of drinking water arsenic contamination. There is a dire need of installation of sustainable community based arsenic mitigation technologies for provisioning of safe drinking water to affected community.</p>

A cluster-based randomized controlled trial promoting community participation in arsenic mitigation efforts in Bangladesh

ObjectiveTo reduce arsenic (As) exposure, we evaluated the effectiveness of training community members to perform water arsenic (WAs) testing and provide As education compared to sending representatives from outside communities to conduct these tasks.MethodsWe conducted a cluster based randomized controlled trial of 20 villages in Singair, Bangladesh. Fifty eligible respondents were randomly selected in each village. In 10 villages, a community member provided As education and WAs testing. In a second set of 10 villages an outside representative performed these tasks.ResultsOverall, 53% of respondents using As contaminated wells, relative to the Bangladesh As standard of 50 μg/L, at baseline switched after receiving the intervention. Further, when there was less than 60% arsenic contaminated wells in a village, the classification used by the Bangladeshi and UNICEF, 74% of study households in the community tester villages, and 72% of households in the outside tester villages reported switching to an As safe drinking water source . Switching was more common in the outside-tester (63%) versus community-tester villages (44%). However, after adjusting for the availability of arsenic safe drinking water sources, well switching did not differ significantly by type of As tester (Odds ratio =0.86[95% confidence interval 0.42-1.77). At follow-up, among those using As contaminated wells who switched to safe wells, average urinary As concentrations significantly decreased.ConclusionThe overall intervention was effective in reducing As exposure provided there were As-safe drinking water sources available. However, there was not a significant difference observed in the ability of the community and outside testers to encourage study households to use As-safe water sources. The findings of this study suggest that As education and WAs testing programs provided by As testers, irrespective of their residence, could be used as an effective, low cost approach to reduce As exposure in many As-affected areas of Bangladesh.

Arsenic mitigation measures in Bangladesh

The scale of arsenic toxicity of the groundwater in Bangladesh is greater than any environmental debacle in the history of human civilization. The main route of arsenic accumulation in the human body is the ingestion of arsenic tainted water. Because of the undetectable nature of arsenic poisoning at the early stage and lack of awareness due to mass illiteracy, poverty and malnutrition, arsenic related ailments may cause death. However, this paper mainly discusses arsenic mitigation measures in Bangladesh. Although a piped surface water supply after treatment is the absolute solution to get rid of this crisis, the weak economic background of Bangladesh does not support supplying such water to every corner of rural areas. Hence research groups have developed their own methods to suit the local environment, using locally available materials and approaches based on the common method of arsenic removal: use of oxidizing agents, followed by flocculation and precipitation. Again, among different alternative water supply options, deep tubewells, which have been used by the communities in Bangladesh during the past few decades, appear to be a more suitable alternate option. Moreover, household-based arsenic filters can be a good choice if proper maintenance can be done.

Correction: Increase in Diarrheal Disease Associated with Arsenic Mitigation in Bangladesh

There is a formatting error in the author byline. Yasuyuki Akita Jahangir Alam 1,3 is incorrect. The correct author names and affiliations are: Yasuyuki Akita1, Jahangir Alam3”.

Arsenic Polluted Groundwater and Its Countermeasures in the Middle Basin of the Ganges, Uttar Pradesh State, India

The arsenic contamination of groundwater in Uttar Pradesh State was first recognized in 2003 and is now seen at 20 Districts out of 70 Districts. University of Miyazaki has performed the arsenic mitigation project in Bahraich District, severest arsenic-affected one in the 20 Districts, from June 2008 until now, with JICA (Japan International Cooperation Agency). The integrated mitigation, such as the raising awareness of villager, installing of alternative water supply units and healthcare of arsenocosis patients, have been executed at the 2 villages. The symptom of the arsenocosis patients was not so severe, which will be, therefore, improved by drinking arsenic-safe water supplied through arsenic removal units, installed by this project. In this paper, following results is discussed for the situation and mechanism of arsenic contamination of groundwater, objected in connection with the installation of arsenic removal units: 1) Groundwater is almost contaminated with arsenic in deep tubewell (depth: about 30 m), but scarcely in shallow tubewell (depth: about 10 m); 2) Arsenic contaminated groundwater is under the reduced condition with the oxidized condition for no-arsenic contaminated groundwater; 3) Arsenic concentration shows almost linear correlation with concentrations of Fe2+ and -N; 4) Ground is composed of sand with high arsenic content at around 25 m depth; 5) Arsenic exists mainly in the phase of reducible fraction or weak acid soluble fraction but no oxidizable fraction in the ground.

Bangladesh arsenic mitigation programs: lessons from the past

Ensuring access to safe drinking water by 2015 is a global commitment by the Millennium Development Goals (MDGs). In Bangladesh, significant achievements in providing safe water were made earlier by nationwide tubewell-installation programme. This achievement was overshadowed in 1993 by the presence of arsenic in underground water. A total of 6 million tubewells have been tested for arsenic since then, the results of which warranted immediate mitigation. Mitigation measures included tubewell testing and replacing; usage of deeper wells; surface water preservation and treatment; use of sanitary dug wells, river sand and pond sand filters; rainwater collection and storage; household-scale and large-scale arsenic filtrations; and rural pipeline water supply installation. Shallow tubewell installation was discouraged. Efforts have been made to increase people's awareness. This paper describes the lessons learned about mitigation efforts by the authors from experience of arsenic-related work. In spite of national mitigation plans and efforts, a few challenges still persist: inadequate coordination between stakeholders, differences in inter-sectoral attitudes, inadequate research to identify region-specific, suitable safe water options, poor quality of works by various implementing agencies, and inadequate dissemination of the knowledge and experiences to the people by those organizations. Issues such as long-time adaptation using ground water, poor surface water quality including bad smell and turbidity, and refusal to using neighbor's water have delayed mitigation measures so far. Region-specific mitigation water supply policy led by the health sector could be adopted with multisectoral involvement and responsibility. Large-scale piped water supply could be arranged through Public Private Partnerships (PPP) in new national approach.

Increase in diarrheal disease associated with arsenic mitigation in Bangladesh.

BackgroundMillions of households throughout Bangladesh have been exposed to high levels of arsenic (As) causing various deadly diseases by drinking groundwater from shallow tubewells for the past 30 years. Well testing has been the most effective form of mitigation because it has induced massive switching from tubewells that are high (>50 µg/L) in As to neighboring wells that are low in As. A recent study has shown, however, that shallow low-As wells are more likely to be contaminated with the fecal indicator E. coli than shallow high-As wells, suggesting that well switching might lead to an increase in diarrheal disease.MethodsApproximately 60,000 episodes of childhood diarrhea were collected monthly by community health workers between 2000 and 2006 in 142 villages of Matlab, Bangladesh. In this cross-sectional study, associations between childhood diarrhea and As levels in tubewell water were evaluated using logistic regression models.ResultsAdjusting for wealth, population density, and flood control by multivariate logistic regression, the model indicates an 11% (95% confidence intervals (CIs) of 4–19%) increase in the likelihood of diarrhea in children drinking from shallow wells with 10–50 µg/L As compared to shallow wells with >50 µg/L As. The same model indicates a 26% (95%CI: 9–42%) increase in diarrhea for children drinking from shallow wells with ≤10 µg/L As compared to shallow wells with >50 µg/L As.ConclusionChildren drinking water from shallow low As wells had a higher prevalence of diarrhea than children drinking water from high As wells. This suggests that the health benefits of reducing As exposure may to some extent be countered by an increase in childhood diarrhea.

COMMUNITY PARTICIPATION TO LOWER ARSENIC EXPOSURE MORE EFFECTIVELY IN BANGLADESH

Background/Aims: Millions of villagers in Bangladesh drink groundwater containing elevated levels of arsenic from their own well water even though arsenic safe water is often available within short walking distance. Well water arsenic testing has been shown to reduce arsenic exposure; however there have been no studies looking at the effectiveness of having a local villager conduct the well testing program. Methods: We conducted a cluster-based randomized controlled trial(RCT) of 1000 households in 20 villages to investigate the impact of having a local person present within a village in comparison to an outside person conducting water arsenic testing and arsenic education in Singair,Bangladesh. Six months after the intervention the rate of well switching and the change in urinary arsenic from baseline was determined. This is the first RCT of arsenic education conducted in Bangladesh using a biological outcome indicator. Results: The trained arsenic testers were able to convince 58% of study households with unsafe wells to switch to alternative drinking water sources. Although we did not find a statistically significant difference between the local and outside tester villages, this overall rate is more than twice the rate of well switching observed in areas that only received well testing from the nationwide Bangladesh Arsenic Mitigation Water Supply Project(BAMWSP). Furthermore the urinary arsenic levels of all study participants with unsafe wells that switched to safe drinking water sources(<50µg As/L) dropped from an average of 215µg As/g creatinine at baseline to 133µg As/g creatinine at follow-up, a 38% reduction in average urinary arsenic content. Those with unsafe wells that did not switch had an average urinary arsenic of 235µg As/g creatinine at follow-up. Conclusions: The success of this intervention demonstrates that training upazila level staff to provide arsenic testing and education is an effective means of reducing arsenic exposure in villages in Bangladesh.

Impact of arsenic pollution on spatial distribution of human development index

This paper reports the impact of arsenic pollution on Human Development Index (HDI) that shows the development standard of a society, country, or a region. HDI is the average of the three dimension indices of Education, Gross Domestic Product (GDP), and Life Expectancy. The study area includes six peripheral administrative blocks of the district Murshidabad of West Bengal, India. About 1.07 million people are exposed to arsenic pollution in this area of whom 0.32 million people are exposed to arsenic concentration above 0.05 mg/L, the WHO maximum permissible level of arsenic in drinking water. Arsenic concentration in groundwater in this area ranges from 0 to 0.35 mg/L. Three dimension indices of HDI were calculated to observe the impact of arsenic pollution on HDI. Life expectancy index was the main cause of reduction in HDI as it was affected by arsenic pollution in groundwater. The study revealed that HDI was highly affected by the arsenic pollution in all six blocks analyzed as HDI was reduced up to 25% due to reduction in life expectancy because of arsenic pollution in groundwater. Blocks Lalgola and Raninagar-2 are of major concern as the observed reduction in HDI was as high as 20 to 25% in some of the mouzas (sub-areas/groups of villages and hamlets) of these two blocks where arsenic pollution in groundwater was very high (0.25 to 0.35 mg/L). The study demonstrated a quantitative and widely acceptable method for the public health engineers to go for proper planning of alternative water supply schemes and management of arsenic mitigation options on a priority basis.

Increase in Diarrheal Disease Associated with Arsenic Mitigation in Bangladesh

Increase in Diarrheal Disease Associated with Arsenic Mitigation in Bangladesh

Contrasting Influence of Geology on E. coli and Arsenic in Aquifers of Bangladesh

Arsenic in groundwater has been a concern in South and Southeast Asia for more than a decade. We explore here the possibility that hydrogeologic factors recently shown to influence the distribution of arsenic might also affect the level of contamination of shallow (<20 m) wells with microbial pathogens. A total of 96 shallow tube wells in two nearby villages of Bangladesh were surveyed during the wet and dry seasons, along with 55 deeper wells in neighboring villages. One of the two villages is located in a particularly sandy environment where recharge is rapid and shallow wells contain little arsenic. Shallow aquifers in the other village are capped with an impermeable clay layer, recharge is an order of magnitude slower, and arsenic levels are high. The fecal indicator E. coli was detected in 43% of shallow wells, compared with 12% of deeper wells. More shallow wells contained E. coli during the wet season (61%) than during the dry season (9%). In the wet season, a higher proportion of shallow wells in the village with low arsenic levels (72%) contained E. coli compared with the village having high arsenic levels (43%). Differences in arsenic and E. coli distributions between the two sites are likely due to the differences in permeability of near-surface sediments although differences in average well-depth between the two villages (9 ± 4 vs. 15 ± 3 m) may play a role as well. Hydrogeologic conditions that favor high levels of fecal contamination but low levels of arsenic in shallow groundwater should be taken into account during arsenic mitigation throughout South and Southeast Asia.

Arsenic Mitigation in Bangladesh: A Household Labor Market Approach

Rural families in Bangladesh, one of the poorest countries in the world, face financial risks from major illness both from the cost of medical care and from the loss of income associated with reduced labor supply and productivity. Chronic exposure to arsenic in drinking water has often been associated with the development of skin cancers and internal cancers, especially of the bladder, liver, and lungs, and a wide variety of other health conditions, such as diabetes, respiratory problems, cardiovascular diseases, hyperpigmentation, hypopigmentation, and keratosis, a condition in which painful nodules grow on the palms of the hands and soles of the feet. Most of the economic work on arsenic contamination in Bangladesh has had an epidemiological focus that has tried to effectively monetize a dose response relation using either a cost of illness or a willingness to pay approach.

Microbial contamination and associated health burden of rainwater harvesting in Bangladesh

Rooftop rainwater harvesting has received an increased attention as a potential alternative water supply source both in the coastal and arsenic affected rural areas in Bangladesh. Several programs in installing rainwater harvesting systems have been implemented to mitigate the drinking water problem in the coastal and arsenic affected areas in the country. This study was conducted with a view to assess sanitary integrity, microbial contamination and the associated health risk of the currently practiced rooftop rainwater harvesting mainly used for drinking water supply. Sanitary inspection of the rainwater harvesting systems and an extensive sampling of harvested rainwater from the storage reservoirs and laboratory analysis were conducted. The study findings reveal that harvested rainwater was found to microbiologically contaminated to some extend. The disease burden estimated using QHRA model showed a significant microbial health burden associated with drinking untreated rainwater and both viral and bacterial pathogens dominate the microbial disease burden. In context of arsenic mitigation, rainwater harvesting reduces the health risk from arsenic; however it may increase the microbial disease burden much higher than the level of arsenic health risk at 50 microg/L of Bangladesh standard. Microbial risk needs proper attention through the implementation of a water safety plan for safe and sustainable rainwater harvesting in Bangladesh.

Arsenic release and attenuation in low organic carbon aquifer sediments from West Bengal

High arsenic concentrations in groundwater are causing a humanitarian disaster in Southeast Asia. It is generally accepted that microbial activities play a critical role in the mobilization of arsenic from the sediments, with metal-reducing bacteria stimulated by organic carbon implicated. However, the detailed mechanisms underpinning these processes remain poorly understood. Of particular importance is the nature of the organic carbon driving the reduction of sorbed As(V) to the more mobile As(III), and the interplay between iron and sulphide minerals that can potentially immobilize both oxidation states of arsenic. Using a multidisciplinary approach, we identified the critical factors leading to arsenic release from West Bengal sediments. The results show that a cascade of redox processes was supported in the absence of high loadings of labile organic matter. Arsenic release was associated with As(V) and Fe(III) reduction, while the removal of arsenic was concomitant with sulphate reduction. The microbial populations potentially catalysing arsenic and sulphate reduction were identified by targeting the genes arrA and dsrB, and the total bacterial and archaeal communities by 16S rRNA gene analysis. Results suggest that very low concentrations of organic matter are able to support microbial arsenic mobilization via metal reduction, and subsequent arsenic mitigation through sulphate reduction. It may therefore be possible to enhance sulphate reduction through subtle manipulations to the carbon loading in such aquifers, to minimize the concentrations of arsenic in groundwaters.

Spatial patterns of fetal loss and infant death in an arsenic-affected area in Bangladesh

BackgroundArsenic exposure in pregnancy is associated with adverse pregnancy outcome and infant mortality. Knowledge of the spatial characteristics of the outcomes and their possible link to arsenic exposure are important for planning effective mitigation activities. The aim of this study was to identify spatial and spatiotemporal clustering of fetal loss and infant death, and spatial relationships between high and low clusters of fetal loss and infant death rates and high and low clusters of arsenic concentrations in tube-well water used for drinking.MethodsPregnant women from Matlab, Bangladesh, who used tube-well water for drinking while pregnant between 1991 and 2000, were included in this study. In total 29,134 pregnancies were identified. A spatial scan test was used to identify unique non-random spatial and spatiotemporal clusters of fetal loss and infant death using a retrospective spatial and spatiotemporal permutation and Poisson probability models.ResultsTwo significant clusters of fetal loss and infant death were identified and these clusters remained stable after adjustment for covariates. One cluster of higher rates of fetal loss and infant death was in the vicinity of the Meghna River, and the other cluster of lower rates was in the center of Matlab. The average concentration of arsenic in the water differed between these clusters (319 μg/L for the high cluster and 174 μg/L for the low cluster). The spatial patterns of arsenic concentrations in tube-well water were found to be linked with the adverse pregnancy outcome clusters. In the spatiotemporal analysis, only one high fetal loss and infant death cluster was identified in the same high cluster area obtained from purely spatial analysis. However, the cluster was no longer significant after adjustment for the covariates.ConclusionThe finding of this study suggests that given the geographical variation in tube-well water contamination, higher fetal loss and infant deaths were observed in the areas of higher arsenic concentrations in groundwater. This illustrates a possible link between arsenic contamination in tube-well water and adverse pregnancy outcome. Thus, these areas should be considered a priority in arsenic mitigation programs.

Technical and Social Evaluation of Arsenic Mitigation in Rural Bangladesh

Technical and social performances of an arsenic-removal technology--the sono arsenic filter--in rural areas of Bangladesh were investigated. Results of arsenic field-test showed that filtered water met the Bangladesh standard (< 50 microg/L) after two years of continuous use. A questionnaire was administrated among 198 sono arsenic filter-user and 230 non-user families. Seventy-two percent of filters (n = 198) were working at the time of the survey. Another 28% of the filters were abandoned due to breakage. The abandonment percentage (28%) was lower than other mitigation options currently implemented in Bangladesh. Households were reluctant to repair the broken filters on their own. High cost, problems with maintenance of filters, weak sludge-disposal guidance, and slow flow rate were the other demerits of the filter. These results indicate that the implementation approaches of the sono arsenic filter suffered from lack of ownership and long-term sustainability. Continuous use of arsenic-contaminated tubewells by the non-user households demonstrated the lack of alternative water supply in the survey area. Willingness of households to pay (about 30%) and preference of household filter (50%) suggest the need to develop a low-cost household arsenic filter. Development of community-based organization would be also necessary to implement a long-term, sustainable plan for household-based technology.

Arsenic pollution: a global synthesis

List of Figures. List of Tables. Series Editors' Preface. Acknowledgements. List of Abbreviations. Glossary. 1. Introduction . 1.1. Background. 1.2. The Nature of Arsenic Pollution. 1.3. History of Natural Arsenic Contamination. 1.4. Arsenic Pollution. 1.5. Risk, Perception and Social Impacts. 1.6. Water-supply Mitigation. 1.7. Structure and Scope of the Book. 2. Hydrogeochemistry of Arsenic . 2.1. Introduction. 2.2. The Chemistry of Normal and Arsenic-Rich Groundwaters. 2.3. Adsorption and Desorption of Arsenic. 2.4. The Role of Sulphur in Strongly Reducing Groundwater. 2.5. Arsenic and Microbial Activity. 2.6. Arsenic Mobilisation Mechanisms. 2.7. Associations of Arsenic with other Trace Elements. 2.8. Arsenic Pollution and Mining. 2.9. Summary. Annexe 2.1. Analysis of Arsenic in Natural Waters. 3. The Hydrogeology of Arsenic . 3.1. Introduction. 3.2. Arsenic in Rocks and Sediments. 3.3. Arsenic in River Water and Sediment. 3.4. Geo-environmental Associations of Arsenic in Groundwater. 3.5. Geochemical Processes in their Geological Context. 3.6. Behaviour of Arsenic in Aquifers. 3.7. Case Histories of Arsenic-affected Aquifers. 3.8. Implications of Long-term Pumping of Arsenic Contaminated Groundwater. 3.9. Summary and Conclusions. 4. Soils and Agriculture . 4.1. Introduction. 4.2. Arsenic in Soils. 4.3. Irrigation with Arsenic-contaminated Water. 4.4. Arsenic Uptake by plants. 4.5. Options for Arsenic Management. 4.6. Research and Development Needs. 5. Health Effects of Arsenic in Drinking Water and Food. 5.1. Introduction. 5.2. A Short History of the Health Effects of Chronic Arsenic Poisoning. 5.3. Toxicity of Arsenic Compounds. 5.4. Environmental Exposure to Arsenic. 5.5. Acute Arsenic Poisoning. 5.6. Dermatological Manifestations. 5.7. Carcinogenic effects. 5.8. Systemic Non-carcinogenic Effects. 5.9. Social and Psychological Effects. 5.10. Effect of Other Toxic and Trace Elements. 5.11. Geographical differences in Health Effects. 5.12. Case History of Arsenic Exposure in Murshidabad District, West Bengal. 5.13. Diagnosis and Treatment of Arsenicosis. 5.14. Removing Exposure to Arsenic. 5.15. Summary and Recommendations. 6. Water-supply Mitigation . 6.1. Introduction. 6.2. Approaches to Water-supply Mitigation. 6.3. Surveys of Arsenic Affected Areas. 6.4. Exploiting Safe Groundwater Sources. 6.5. Developing Surface Water Sources. 6.6. Arsenic in Water Distribution Networks. 6.7. Socio-economic Aspects of Mitigation. 6.8. Policy and Planning Initiatives. 6.9. Monitoring and Evaluation of Water-supply Mitigation Programmes. 6.10. Summary. Annexe 6.1. Arsenic Survey Procedures. 7. Removing Arsenic from Drinking Water . 7.1. Introduction. 7.2. Water Quality Issues. 7.3. Methods of Arsenic Removal. 7.4. Aquifer Clean-up. 7.5. Disposing of Waste from Treatment Processes. 7.6. Examples and Operational Experience of Arsenic Removal Technologies. 7.7. Costs of Arsenic Removal. 7.8. Guidance for Selecting Treatment Methods and Technologies. 7.9. Case Study of Water Treatment Requirements in Bangladesh. 7.10. Future Needs. 8. Arsenic in Asia . 8.1. Introduction. 8.2. South Asia. 8.3. Southeast Asia. 8.4. China. 8.5. East Asia. 8.6. Western, Central and Northern Asia. 8.7. Suspect Terrain and Research Needs. Annexe 8.1. The British Geological Survey Court Case. 9. Arsenic in North America and Europe. 9.1. Introduction. 9.2. United States of America and Canada. 9.3. Mexico. 9.4. Europe. 9.5. Suspect Terrain and Research Needs. 10. Arsenic in South and Central America, Africa, Australia and Oceania . 10.1. Introduction. 10.2. South and Central America. 10.3. Africa. 10.4. Australasia. 10.5. Arsenic in the Ocean Basins. 10.6. Suspect Terrain and Research Needs. 11. Synthesis, Conclusions and Recommendations. 11.1. Scale and Impact of Arsenic Pollution. 11.2. Chemistry, Cause and Prediction. 11.3. Agricultural Impacts, Prospects and Needs. 11.4. Water-supply Mitigation. 11.5. Sustainability Issues. 11.6. Geographical Perspectives. 11.7. The Politics of Arsenic Pollution and Mitigation. 11.8. Ten Priority Actions. Notes. References. Index

Community and participation in water resources management: gendering and naturing development debates from Bangladesh

Community and participation have become popular in development discourse and practice, particularly in the global South and in relation to water resources management. Greater involvement of people in decisionmaking, implementation and evaluation of water management practices is expected to increase efficiency and equity in water projects. However, scholars have pointed out that such discourses are often problematically used and idealised, leading to the exacerbation of gender, class and other social differentiations. Drawing from a case study of drinking water contamination by arsenic in Bangladesh, this article examines the mobilisation and outcomes of participation and community in water provision and arsenic mitigation. Water hardship, conflicts and marginalisations are found to be products of social processes (that are gendered, classed and spatialised) as well as natural processes (local geohydrology, depth of arsenic sediments), in addition to the very ways that community and participation are conceptualised and practised. Nature/water comes to play a critical role in the ways that development interventions play out, thereby complicating the general debates around community and participation. This article seeks to problematise the ways that considerations of both the roles of nature and gender power relations can be more critically and productively engaged in development geography. As such, the article brings together debates in nature–society geography and development geography to argue that scholars studying community and participation need to pay greater attention not only to gender and spatial power relations, but also to the importance of geographical locations and the agency of heterogeneous nature in the ways water management and development interventions fail and succeed, and are thereby critiqued. More adaptive, reflexive and inclusive development realities that are simultaneously embedded in society and nature may then be envisioned, and more nuanced understandings of nature‐in‐development enabled.

Bangladesh and Vietnam: Different Groundwater Compositions Require Different Approaches to Arsenic Mitigation

To be successful, the mitigation strategy must take into account the geological differences in groundwater, the economic resources of the population, and the availability of infrastructure for water treatment.

Epidemiology and prevention of chronic arsenicosis: An Indian perspective

Arsenicosis is a global problem but the recent data reveals that Asian countries, India and Bangladesh in particular, are the worst sufferers. In India, the state of West Bengal bears the major brunt of the problem, with almost 12 districts presently in the grip of this deadly disease. Recent reports suggest that other states in the Ganga/Brahmaputra plains are also showing alarming levels of arsenic in ground water. In West Bengal, the majority of registered cases are from the district of Nadia, and the maximum number of deaths due to arsenicosis is from the district of South 24 Paraganas. The reason behind the problem in India is thought to be mainly geogenic, though there are instances of reported anthropogenic contamination of arsenic from industrial sources. The reason for leaching of arsenic in ground water is attributed to various factors, including excessive withdrawal of ground water for the purpose of irrigation, use of bio-control agents and phosphate fertilizers. It remains a mystery why all those who are exposed to arsenic-contaminated water do not develop the full-blown disease. Various host factors, such as nutritional status, socioeconomic status, and genetic polymorphism, are thought to make a person vulnerable to the disease. The approach to arsenicosis mitigation needs be holistic, sustainable, and multidisciplinary, with the 2 main pillars being health education and provision of 'arsenic-free water.' In the state of West Bengal, the drive for arsenic mitigation has been divided into 3 phases using various methods, including new hand pumps/tube wells at alternative deep aquifers, dug wells, arsenic removal plants, arsenic treatment units, as well as piped and surface water supply schemes. The methods have their own limitations, so it is intended that a pragmatic approach be followed in the arsenicosis prevention drive. It is also intended that the preventive measures be operationally and economically feasible for the people living in the affected areas.