Cited by 1,096Arsenic contamination and mitigationHeavy metals in environmentMine drainage and remediation techniques

Arsenic Contamination of Groundwater and Drinking Water in Vietnam: A Human Health Threat

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Berg, Michael, Tran, Hong Con, Nguyen, Thi Chuyen, Pham, Hung Viet, Schertenleib, Roland, Giger, Walter·2001·Environmental Science & Technology

Abstract

This is the first publication on arsenic contamination of the Red River alluvial tract in the city of Hanoi and in the surrounding rural districts. Due to naturally occurring organic matter in the sediments, the groundwaters are anoxic and rich in iron. With an average arsenic concentration of 159 micrograms/L, the contamination levels varied from 1 to 3050 micrograms/L in rural groundwater samples from private small-scale tubewells. In a highly affected rural area, the groundwater used directly as drinking water had an average concentration of 430 micrograms/L. Analysis of raw groundwater pumped from the lower aquifer for the Hanoi water supply yielded arsenic levels of 240-320 micrograms/L in three of eight treatment plants and 37-82 micrograms/L in another five plants. Aeration and sand filtration that are applied in the treatment plants for iron removal lowered the arsenic concentrations to levels of 25-91 micrograms/L, but 50% remained above the Vietnamese Standard of 50 micrograms/L. Extracts of sediment samples from five bore cores showed a correlation of arsenic and iron contents (r2 = 0.700, n = 64). The arsenic in the sediments may be associated with iron oxyhydroxides and released to the groundwater by reductive dissolution of iron. Oxidation of sulfide phases could also release arsenic to the groundwater, but sulfur concentrations in sediments were below 1 mg/g. The high arsenic concentrations found in the tubewells (48% above 50 micrograms/L and 20% above 150 micrograms/L) indicate that several million people consuming untreated groundwater might be at a considerable risk of chronic arsenic poisoning.

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Authors
Berg, M., Tran, H. C., Nguyen, T. C., Pham, H. V., Schertenleib, R., & Giger, W.
Affiliations
Swiss Federal Institute of Aquatic Science and Technology (CH)
Corresponding author
Berg, Michael
Venue
Environmental Science & Technology
Published
2001-06-28
Volume
35
Issue
13
Pages
2621-2626
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2090349830
Cited by
1,096
References
20
Citations by year
2026: 14 · 2025: 25 · 2024: 28 · 2023: 30 · 2022: 53 · 2021: 36 · 2020: 54 · 2019: 66 · 2018: 47 · 2017: 61 · 2016: 48 · 2015: 46 · 2014: 49 · 2013: 46 · 2012: 56
FWCI
24.05
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
  • DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Environmental Science › Environmental Chemistry › Mine drainage and remediation techniques
Keywords
arsenic contamination, groundwater, drinking water, Hanoi, tube wells, iron oxyhydroxide, reductive dissolution, iron removal, sediment arsenic, arsenicosis, human health risk
MeSH terms
Arsenic, Environmental Monitoring, Humans, Iron, Oxidation-Reduction, Public Health, Risk Factors, Soil Pollutants, Sulfur, Vietnam, Water Pollutants, Chemical, Water Supply, Geologic Sediments

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