Effects of Biochar Amendment on Chloropicrin Adsorption and Degradation in Soil

文献类型： 外文期刊

第一作者： Wang, Qiuxia

作者： Wang, Qiuxia;Yan, Dongdong;Fang, Wensheng;Mao, Liangang;Li, Yuan;Ouyang, Canbin;Guo, Meixia;Cao, Aocheng;Wang, Dong

作者机构：

关键词： chloropicrin;biochar;pyrolysis temperature;adsorption;degradation

期刊名称：ENERGIES （ 影响因子：3.004； 五年影响因子：3.085 ）

ISSN： 1996-1073

年卷期： 2016 年 9 卷 11 期

页码：

收录情况： SCI

摘要： The characteristics of biochar vary with pyrolysis temperature. Chloropicrin (CP) is an effective fumigant for controlling soil-borne pests. This study investigated the characteristics of biochars prepared at 300, 500, and 700 degrees C by michelia alba (Magnolia denudata) wood and evaluated their capacity to adsorb CP. The study also determined the potential influence of biochar, which was added to sterilized and unsterilized soils at rates of 0%, 1%, 5%, and 100%, on CP degradation. The specific surface area, pore volume, and micropores increased considerably with an increase in the pyrolytic temperature. The adsorption rate of biochar for CP increased with increasing pyrolytic temperature. The maximum adsorption amounts of CP were similar for the three biochars. Next, the study examined the degradation ability of the biochar for CP. The degradation rate constant (k) of CP increased when biochar was added to the soil, and k increased with increased amendment rate and pyrolysis temperature. The results indicate that biochar can accelerate CP degradation in soil. The findings will be instructive in using biochar as a new fertilizer in fumigating soil with CP.

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