生物炭负载纳米零价铁材料的制备及还原降解性能

doi:10.11934/j.issn.1673-4831.2017.07.011

Abstract

Abstract:

Three kinds of biochars (BCs) were prepared from peanut shell, rice straw and corn stalk, and further into three kinds of composites of the corresponding biochar-loaded with nano zero-valent iron (BC/nZVI), separately, of which physic-chemical properties and structures were characterized with BET and SEM, respectively. Moreover, effects of the BC/nZVI reductively degrading γ-benzene hexachloride (BHC), a typical organochlorine pesticide (OCP) in aqueous solutions were determined. Results show that peanut shell, rice straw and corn stalk pyrolyzed at 300℃ turned out the highest amounts of BCs, which were high in adsorption capacity. The prepared BC/nZVI appeared to be in spherical particle, and the one prepared out of peanut shell was the highest in dispersivity. In aqueous phase experiments, BC/nZVI was much higher than BC or nZVI in effect of removing γ-BHC. Among three kinds of composites, the peanut shell based BC/nZVI was the highest in γ-BHC removal rate, reaching up to 87.53% in aqueous solutions for six hours and had the total pollutant degradation rate reach up to 82.33% in the reaction system.

Key words: biochar, nano zero-valent iron, γ-BHC, adsorption, degradation

CLC Number:

LIN Lin, WAN Jin-zhong, LI Qun, ZHOU Yan, WU Juan, LI Chuan, ZHANG Sheng-tian, ZHU Li-jun. Preparation and Reductive Degradation Properties of Biochar Loaded With Nano Zero-Valent Iron[J]. Journal of Ecology and Rural Environment, 2017, 33(7): 660-664.

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Preparation and Reductive Degradation Properties of Biochar Loaded With Nano Zero-Valent Iron

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