Arsenic in groundwater and sediment in the Mekong River delta, Vietnam

被引：90

作者：

Thi Hanh Hoang

Bang, Sunbaek

Kim, Kyoung-Woong

My Hoa Nguyen ^{[1
]}

Duy Minh Dang ^{[1
]}

机构：

[1] Cantho Univ, Coll Agr, Soil Sci & Land Management Dept, Cantho City, Vietnam

来源：

ENVIRONMENTAL POLLUTION | 2010年 / 158卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

Arsenic; Iron; Manganese; Groundwater; Core sample; Mekong river delta; Vietnam; DRINKING-WATER RESOURCES; METAL-REDUCING BACTERIA; SHALLOW SEDIMENTS; ORGANIC-MATTER; WEST-BENGAL; BANGLADESH; CAMBODIA; CONTAMINATION; RELEASE; RISK;

D O I：

10.1016/j.envpol.2010.05.001

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A study of groundwater and sediment during 2007-2008 in the Mekong River delta in Vietnam (MDVN) revealed that 26%, 74%, and 50% of groundwater samples were above the US EPA drinking water guidelines for As (10 mu g/L), Mn (0.05 mg/L), and Fe (0.3 mg/L). The range of As, Fe, and Mn concentrations in the MDVN were <0.1-1351 mu g/L, <0.01-38 mg/L, and <0.01-14 mg/L, respectively. Elevated levels of As were found in groundwater at sampling sites close to the Mekong River and in wells less than 60 -70 m deep. An inverse relationship was found between As and Mn concentrations in groundwater. Sediment samples from An Giang and Dong Thap had the highest As concentrations (18 mg/kg and 38 mg/kg, respectively). Arsenic sediment occurred mainly in the poorly crystalline Fe oxide phases. Reductive dissolution of the Fe oxide phase is not necessarily the dominant mechanism of As release to groundwater. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2648 / 2658

页数：11

共 45 条

[21] Arsenic in groundwater: Testing pollution mechanisms for sedimentary aquifers in Bangladesh [J].