Variation in Arsenic Concentration Relative to Ammonium Nitrogen and Oxidation Reduction Potential in Surface and Groundwater

Autor:	Kazuhiko Egashira, M. Jahiruddin, Masakazu Tani, Abu Zofar Md. Moslehuddin, M. Zulfikar Rahman, Kiyoshi Kurosawa
Rok vydání:	2008
Předmět:	Ecology Soil Science chemistry.chemical_element δ15N Contamination Nitrogen chemistry.chemical_compound chemistry Nitrate Reduction potential Environmental chemistry Environmental science Ammonium Agronomy and Crop Science Groundwater Arsenic
Zdroj:	Communications in Soil Science and Plant Analysis. 39:1467-1475
ISSN:	1532-2416 0010-3624
DOI:	10.1080/00103620802004318
Popis:	Arsenic (As), ammonium‐nitrogen (N), nitrate‐N concentrations, and oxidation–reduction potential (ORP) in the water samples from the river, pond, dug well, and shallow and deep tube wells (TW) were investigated in a farming village of southwestern Bangladesh. Concentrations of As and ammonium‐N were the highest, whereas ORP was the lowest in the shallow TW water among the water sources. The ammonium‐N concentration correlated positively with the As concentration and negatively with ORP for all samples, irrespective of the water sources. A rise in the ammonium‐N concentration was hypothesized to enhance microbial activity, which in turn would lower ORP, and then As was released from sediments to the surrounding water in a reducing condition. The source of ammonium‐N in the shallow TW water was identified as N fertilizer, based on the δ15N analysis. Thus, the influence of N fertilizer application on As contamination in groundwater was suggested.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7c22dff262ae32218e87f1d2368308a0 https://doi.org/10.1080/00103620802004318 Zobrazit plný text záznamu