Arsenic fractions and enzyme activities in arsenic-contaminated soils by groundwater irrigation in West Bengal
Arsenic fractions and enzyme activities in arsenic-contaminated soils by groundwater irrigation in West Bengal
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DOI：
10.1016/j.ecoenv.2007.08.015
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发表时间：
2008-09-01
影响因子：
6.8
通讯作者：
Kim, Seok-Hwi
中科院分区：
文献类型：
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作者：
Bhattacharyya, Pradip;Tripathy, Subhasish;Kim, Seok-Hwi
在印度西孟加拉邦受砷（As）污染的土壤中，开展了一项关于砷污染对β - 葡萄糖苷酶、脲酶、酸性/碱性磷酸酶和芳基硫酸酯酶活性影响的研究。所研究的土壤相较于其他砷污染场地，总砷含量较低。采用连续提取技术对水溶性、可交换性、碳酸盐结合态、铁/锰氧化物结合态、有机结合态和残余态砷进行定量分析。两种最不稳定的组分（即水溶性和可交换性组分）中的砷浓度通常较低。所研究的酶与水溶性和可交换性砷形态呈显著负相关，但与其他形态无显著相关性，这表明水溶性和可交换性形态对土壤酶活性具有强烈的抑制作用。因此，建议酶活性可有助于评估砷对土壤生化质量的影响。（C）2007爱思唯尔公司。保留所有权利。
A study for the effect of arsenic (As) contamination on beta-glucosidase, urease, acid-/alkaline-phosphatase, and arylsulphatase activities was conducted in As contaminated soils of West Bengal, India. The studied soils show low total As contents relative to those in other As-contaminated sites. A sequential extraction technique was used to quantify water soluble, exchangeable, carbonate bound, Fe/Mn oxide bound, organic bound, and residual As fractions. Arsenic concentrations in the two most labile fractions (i.e., water soluble and exchangeable fractions) were generally low. The studied enzymes were significantly and negatively correlated with water soluble and exchangeable As forms but did not show any significant correlations with other forms, indicating that water soluble and exchangeable forms exert a strong inhibitory effect on the soil enzyme activities. It is thus suggested that the enzyme activity can be helpful in assessing the effects of As on biochemical quality of soils. (C) 2007 Elsevier Inc. All rights reserved.