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EFFECTS OF CORN COB BIOCHAR ON THE ADSORPTION OF ATRAZINE IN SOIL

文献类型： 外文期刊

作者： Ping, Hua 1 ; Li, Cheng 2 ; Ma, Zhihong 2 ; Wang, Beihong 2 ; Chen, Jiayi 2 ; Li, Yang 2 ; Wang, Jihua 1 ;

作者机构： 1.Shenyang Agr Univ, Coll Informat & Elect Engn, Shenyang 110866, Liaoning, Peoples R China

2.Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China

3.Beijing Municipal Key Lab Agr Environm Monitoring, Beijing 100097, Peoples R China

4.Beijing Municipa

关键词： Biochar; atrazine; adsorption capability; soil

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）

ISSN： 1018-4619

年卷期： 2018 年 27 卷 4 期

页码：

收录情况： SCI

摘要： Biochar is a stable carbon-rich product which can decrease organic pollutant contaminations in soil. In this study, corn cob carbonized at 400 degrees C (C400) and 700 degrees C (C700) were taken as materials to study the effect of biochar on atrazine adsorption in soil using a batch equilibrium method. The kinetics of atrazine in soils was completed in two steps: a fast adsorption and a slow adsorption, and equilibrium were reached after 24 h of adsorption. The Freundlich model was well fitted to the adsorption process in the biomass carbon in the soil, and the correlation coefficient value was between 0.986-0.999. With addition of 1.0% C400 biochar, the adsorption constant (log KJ) was 1.30 times that of no-biochar soil, and addition of 1.0% C700 biochar produced an adsorption constant (log KJ) that was 6.28 times that of no-biochar soil. At the same addition ratio (1.0%), the adsorption coefficient (Kd) of C700 was 828 mL/g, 229 times that of C400 (3.62 mL/g). Corn cob biochar therefore has a clear ability to adsorb atrazine from trazine-contaminated soil and the adsorption capacity of C700 was significantly higher than C400. C700 was the best sorbent for atrazine removal because of its extremely high specific surface area.

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