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Effect of Cr(VI) on Fe(III) reduction in three paddy soils from the Hani terrace field at high altitude

文献类型： 外文期刊

作者： Li, Xiao-min 1 ; Liu, Tong-xu 1 ; Zhang, Nai-ming 2 ; Ren, Guo 2 ; Li, Fang-bai 1 ; Li, Yong-tao 3 ;

作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China

2.Yunnan Agr Univ, Coll Resources & Environm, Kunming 650201, Peoples R China

3.S China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China

关键词： Fe(III) reduction;Cr(VI) effect;Interaction;Paddy soil;Terrace field;High altitude

期刊名称：APPLIED CLAY SCIENCE （ 影响因子：5.467； 五年影响因子：5.414 ）

ISSN： 0169-1317

年卷期： 2012 年 64 卷

页码：

收录情况： SCI

摘要： Batch experiments were conducted to investigate the effect of Cr(VI) on Fe(III) reduction in typical paddy soils from the Hani terrace field at different high altitudes. Firstly, soils with and without autoclaving were used to evaluate abiotic and biotic contributions on Fe(III) reduction in different soils. The results showed biotic reaction mainly contributed to Fe(III) reduction in Bada soil. Both abiotic and biotic Fe(III) reductions were limited in Duoyishu soil, while Fe(III) reduction in Laohuzui soil was predominantly driven by abiotic reactions. The difference of Fe(III) reduction was related to organic matter and Fe availability in soils. In the presence of Cr(VI), Fe(III) reduction was evidently inhibited and delayed in all soils. Under anaerobic condition, adsorption and reduction of Cr(VI) occurred simultaneously in soils. The presence of Cr(VI) can influence Fe(III) reduction in several ways, e.g., competition of Fe(III) and Cr(VI) reductions, preferred reduction of Cr(VI), retard of biotic Fe(III) reduction, and consumption of Fe(II) by Cr(VI), all of which may coexist in natural paddy soil. However, the extent of influence exerted by different interaction varies from each other in different soils, which is strongly associated with the soil characteristics. (C) 2012 Elsevier B.V. All rights reserved.

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