Effect of Arsenic Pollution Extent on Microbial Community in Shimen Long-Term Arsenic-Contaminated Soil
文献类型： 外文期刊
第一作者： Yu, Zhaojing
作者： Yu, Zhaojing;Liu, Xueduan;Yin, Huaqun;Yu, Runlan;Zeng, Weimin;Yu, Zhaojing;Zeng, Xibai
作者机构：
关键词： Arsenic-contaminated soil; Microbial community; Arsenic migration and transformation; Exogenous arsenic stress
期刊名称：WATER AIR AND SOIL POLLUTION （ 影响因子：2.52； 五年影响因子：2.574 ）
ISSN： 0049-6979
年卷期： 2020 年 231 卷 7 期
页码：
收录情况： SCI
摘要： In order to investigate arsenic migration and transformation behavior under the action of microorganisms in Shimen long-term arsenic-contaminated soil under the condition of avoiding any influence of complicated soil environmental factors except increasing soil arsenic pollution degree, exogenous arsenic(III) or arsenic(V) stress experiments were carried out under the same experimental condition using the same soil sample. The changes of microbial community with exogenous arsenic concentrations and stress time were regularly monitored and comparatively analyzed. The soil microbial community shows extremely high diversities, and arsenic pollution degree affects microbial community composition rather than microbial diversity due to the long-term adaptation of microorganism to the arsenic-contaminated soil.AcidiobacteriaandNitrospiraeplay a key role in soil arsenic migration and transformation. Nitrospirae through producing NO(3)(-)takes part in the oxidation of As(III), andAcidiobacteriaoxidizing sulfide minerals, as well as the adsorption and deposition of As(V), can enhance the soil acidity to promote soil arsenic migration and transformation, which can bring about the significant change of soil microbial community composition. Finally, its microbial community should tend to maintain a new pseudo-dynamic balance after a long time and a long-term arsenic-contaminated soil must be an arsenic oxidation-state soil. This work helps us understand why total arsenic, total organic carbon(TOC), NO3-, and pH are the key environmental factors that indirectly control the mobilization and release of arsenic via influencing the structures of the microbial communities in Shimen arsenic-contaminated soil.
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