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Energies 2016, 9(11), 869;

Effects of Biochar Amendment on Chloropicrin Adsorption and Degradation in Soil

Southwest Research and Design Institute of Chemical Industry Co., Ltd., Chengdu 610225, China
Plant Protection Institute of Chinese Academy of Agricultural Sciences, State Key Laboratory for Biology of Plant Disease and Insect Pest, Beijing 100193, China
U.S. Department of Agriculture—Agricultural Research Service (USDA-ARS), Water Management Research Unit, Parlier 93648, CA, USA
Authors to whom correspondence should be addressed.
Academic Editor: Mejdi Jeguirim
Received: 10 August 2016 / Revised: 6 October 2016 / Accepted: 18 October 2016 / Published: 26 October 2016
(This article belongs to the Special Issue Biomass Chars: Elaboration, Characterization and Applications)
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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 °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. View Full-Text
Keywords: chloropicrin; biochar; pyrolysis temperature; adsorption; degradation chloropicrin; biochar; pyrolysis temperature; adsorption; degradation

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Liu, P.; Wang, Q.; Yan, D.; Fang, W.; Mao, L.; Wang, D.; Li, Y.; Ouyang, C.; Guo, M.; Cao, A. Effects of Biochar Amendment on Chloropicrin Adsorption and Degradation in Soil. Energies 2016, 9, 869.

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