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The effect of ammonium chloride and urea application on soil bacterial communities closely related to the reductive transformation of pentachlorophenol

文献类型： 外文期刊

作者： Yu, Huan-Yun 1 ; Wang, Yong-kui 2 ; Chen, Peng-cheng 1 ; Li, Fang-bai 1 ; Chen, Man-jia 1 ; Hu, Min 1 ;

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

2.Hubei Polytech Univ, Environm Sci & Engn Coll, Huangshi 435003, Hubei, Peoples R China

关键词： Pentachlorophenol (PCP);Nitrogen fertilizer;Reductive transformation;Dissimilatory iron-reducing bacteria (DIRB);Dechlorinating bacteria

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

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收录情况： SCI

摘要： Pentachlorophenol (PCP) is widely distributed in the soil, and nitrogen fertilizer is extensively used in agricultural production. However, studies on the fate of organic contaminants as affected by nitrogen fertilizer application have been rare and superficial. The present study aimed to examine the effect of ammonium chloride (NH_4C1) and urea (CO(NH_2)_2) application on the reductive transformation of PCP in a paddy soil. The study showed that the addition of low concentrations of NH_4Cl/CO(NH_2)_2 enhanced the transformation of PCP, while the addition of high concentrations of NH_4Cl/CO(NH_2)_2 had the opposite effect. The variations in the abundance of soil microbes in response to NH_4Cl/CO(NH_2)_2 addition showed that both NH_4Cl and CO(NH_2)_2 had inhibitory effects on the growth of dissimilatory iron-reducing bacteria (DIRB) of the genus Comamonas. In contrast, for the genus Shewanella, low concentrations of NH_4Cl inhibited growth, and high concentrations of NH_4Cl enhanced growth, whereas all concentrations of CO(NH_2)_2 showed enhancement effects. In addition, consistent patterns of variation were found between the abundances of dechlorinating bacteria in the genus Dehalobacter and PCP transformation rates under NH_4Cl/CO(NH_2)_2 addition. In conclusion, nitrogen application produced variations in the structure of the soil microbial community, especially in the abundance of dissimilatory iron-reducing bacteria and dechlorinating bacteria, which, in turn, affected PCP dechlorination.

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[1]Biochar enhances the microbial and chemical transformation of pentachlorophenol in paddy soil. Tong, H.,Hu, M.,Li, F. B.,Liu, C. S.,Chen, M. J.,Tong, H.,Tong, H..

[2]Understanding the role of Fe(III)/Fe(II) couple in mediating reductive transformation of 2-nitrophenol in microbial fuel cells. Li, Fangbai,Liu, Liang,Tong, Hui,Feng, Chunhua,Feng, Chunhua,Liu, Yongye,Yue, Xianjun,Sun, Kewen.

[3]Reduction in nitrogen fertilizer use results in increased rice yields and improved environmental protection. Wang, Huaiyu,Hu, Ruifa,Chen, Xiaoxue,Zheng, Zuting,Zhong, Xuhua,Huang, Nongrong,Xue, Chunling. 2017

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