Effects of Fe-Mn modified biochar composite treatment on the properties of As-polluted paddy soil

文献类型： 外文期刊

第一作者： Lin, Lina

作者： Lin, Lina;Liu, Xuewei;Song, Zhengguo;Li, Zhongyang;Qiu, Weiwen

作者机构：

关键词： Fe-Mn modified biochar composite; Arsenic; Soil enzymes; Soil bacteria

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN： 0269-7491

年卷期： 2019 年 244 卷

页码：

收录情况： SCI

摘要： This study aimed to determine the effects of Fe Mn modified biochar composite (FMBC) treatment on the pH, redox properties, enzyme activities, and bacterial communities of As-polluted paddy soil. The two utilized FMBCs (FMBC1 and FMBC2) exhibited markedly different effects on soil pH, and treatment with biochar (BC) or FMBCs increased the soil redox potential and reduced the content of available As, facilitating the conversion of originally present non-specifically sorbed and specifically bound As forms to residual, amorphous hydrous oxide bound, and crystalline hydrous oxide-bound ones. In general, the activities of soil enzymes increased after the above treatments, with the exception of that of alkaline phosphatase, which decreased upon supplementation with FMBC2. Supplementation with BC or FMBCs increased the abundance of Proteobacteria and Firmicutes, decreasing that of Bacteroidetes. Notably, FMBC1 and FMBC2 affected soil properties in different ways, although the mechanisms of the corresponding influence were similar. Thus, treatment with BC-based materials changed the distribution of As and the activities of soil enzymes, additionally affecting a variety of other physicochemical soil properties to make it suitable for microbial growth. (C) 2018 Elsevier Ltd. All rights reserved.

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