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Effects of peat and water quality parameters on groundwater arsenic contamination in B angladesh
Author(s) -
Uddin Md. Shamim,
Kurosawa Kiyoshi
Publication year - 2014
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12017
Subject(s) - groundwater , peat , environmental chemistry , contamination , environmental science , arsenic , arsenic contamination of groundwater , ammonium , contaminated groundwater , environmental engineering , chemistry , environmental remediation , geology , ecology , geotechnical engineering , organic chemistry , biology
Abstract To clarify the effect of peat and groundwater quality parameters on groundwater arsenic ( As ) contamination, As concentrations and the source of nitrogen ( N ) in groundwater and peat, and oxidation‐reduction potential ( ORP ) and ammonium‐ N concentration of groundwater were compared between As ‐contaminated and uncontaminated areas in B angladesh. Groundwater in the contaminated area had a reducing ORP with a high ammonium‐ N concentration, whereas groundwater in the uncontaminated area had a non‐reducing ORP with a low ammonium‐ N concentration. Peat was present only in the contaminated area, whose As concentration was very high, indicating the critical role of peat in groundwater As contamination. The source of N in peat and groundwater was identified as chemical N fertilizer. N present in peat and groundwater served as a nutrient, enhancing microbial activity. In the reducing ORP condition, As was thought to be released intensively to groundwater by the mechanism of reductive release.