Health Effects of Exposure to Natural Arsenic in Groundwater and Coal in China: An Overview of Occurrence
- 1 April 2007
- journal article
- Published by Environmental Health Perspectives in Environmental Health Perspectives
- Vol. 115 (4), 636-642
- https://doi.org/10.1289/ehp.9268
Abstract
Between 2001 and 2005, 21,155 of 445,638 wells in 20,517 villages in 292 counties in 16 provinces from China, or 5% of wells, were found to contain > 50 μg/L arsenic (As) by field testing with the Merck As kit. We achieved quality assurance of analysis of at least 10% of the wells containing > 50 μg/L As using hydride generation atomic fluorescence spectrometry and silver dithiodicarbomate spectrometry. Our best estimate of the population exposed to > 50 μg/L As in drinking water was 582,769. This is probably an underestimate for China because of the limited area surveyed. In a survey of 135,492 individuals in eight provinces, we used the National Diagnosis Standard for Endemic Arsenicosis and identified 10,096 cases of arsenicosis with various degrees of skin lesions. The arsenicosis occurrence rate of 7.5% is likely an overestimate, because the survey focused more on known and suspected endemic areas of arsenicosis. The occurrence of arsenicosis correlates positively with the percentage of wells containing > 50 μg/L As, or at a ratio of 1 to 5%. Based on both the amount of As in well water and the rate of occurrence of arsenicosis, Shanxi province, Inner Mongolia autonomous region, and Jilin province are the top three areas in China as of 2005 for exposure to endemic As from drinking water. Our survey also identified exposure to high levels of As from wells in several provinces and from the indoor burning of coal containing high levels of As in Shaanxi province. These areas, however, have not had any reports of previous arsenicosis endemics. In the endemic areas, the average rate of occurrence of arsenicosis at advanced stages was 1.2%, possibly because of a long exposure time of > 20 years; the rate of occurrence increased to 2.7% when we included a high dose of As exposure from the indoor burning of coal. Mitigation to reduce As exposure remains a challenge in rural China.Keywords
This publication has 23 references indexed in Scilit:
- Unventilated Indoor Coal-Fired Stoves in Guizhou Province, China: Reduction of Arsenic Exposure through Behavior Changes Resulting from Mitigation and Health Education in Populations with ArsenicosisEnvironmental Health Perspectives, 2007
- Unventilated Indoor Coal-Fired Stoves in Guizhou Province, China: Cellular and Genetic Damage in Villagers Exposed to Arsenic in Food and AirEnvironmental Health Perspectives, 2007
- Urinary Arsenic Metabolites in Children and Adults Exposed to Arsenic in Drinking Water in Inner Mongolia, ChinaEnvironmental Health Perspectives, 2007
- Arsenic and Fluoride Exposure in Drinking Water: Children’s IQ and Growth in Shanyin County, Shanxi Province, ChinaEnvironmental Health Perspectives, 2007
- Arsenic contamination and arsenicosis in ChinaToxicology and Applied Pharmacology, 2004
- Redox control of arsenic mobilization in Bangladesh groundwaterApplied Geochemistry, 2004
- Mobilisation of arsenic and other trace elements in fluviolacustrine aquifers of the Huhhot Basin, Inner MongoliaApplied Geochemistry, 2003
- A review of the source, behaviour and distribution of arsenic in natural watersApplied Geochemistry, 2002
- Issues of health and disease relating to coal use in southwestern ChinaInternational Journal of Coal Geology, 1999
- Occurrence of Arsenic-contaminatedGroundwater in Alluvial Aquifers from Delta Plains, Eastern India: Options for Safe Drinking Water SupplyInternational Journal of Water Resources Development, 1997