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The enhancement of atrazine sorption and microbial transformation in biochars amended black soils
Chemosphere ( IF 8.8 ) Pub Date : 2017-09-08 , DOI: 10.1016/j.chemosphere.2017.09.022 Fan Yang , Wei Zhang , Jinmei Li , Shuyao Wang , Yue Tao , Yifan Wang , Ying Zhang
Chemosphere ( IF 8.8 ) Pub Date : 2017-09-08 , DOI: 10.1016/j.chemosphere.2017.09.022 Fan Yang , Wei Zhang , Jinmei Li , Shuyao Wang , Yue Tao , Yifan Wang , Ying Zhang
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Generally, biochar plays an important role in controlling migration and accumulation of pollutants in soil. In this dissertation, biochars derived from wheat straw at various pyrolysis temperatures are used to investigate how biochar amendment affects adsorption and microbial degradation of atrazine (typical diffuse herbicide) in soils. In order to explore the influence of soil components, soil samples with different organic matter content are collected from typical agricultural sites, which are characterized as black soils of the northeast region of China. The basic sorption characteristics of biochars from wheat straws prepared at diverse pyrolysis temperature are analyzed, along with the comparisons of the sorption difference in the raw soil and soil amended with biochars at four levels of ratio (0.1%, 0.5%, 1.0% and 2.0%). By incubation experiments, atrazine degradation in nonsterile and sterile soils and effects of atrazine degradation rate after biochar amendment are also studied. Atrazine degradation is significantly enhanced in biochar amended soils, which may be because that biochar supplement can promote the growth and metabolism of microorganisms in the soil. Our findings reveal that wheat-straw derived biochar may be an effective remediation reagent for activating degradation of the soil functional microorganism and enhancing sorption of organic matter content, which can be applied to environmental-friendly accelerate the remediation of atrazine contaminated black soils.
更新日期：2017-09-13
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