芘
环境修复
苯
化学
机械化学
球磨机
降级(电信)
环境化学
碳化
土壤污染
污染
拉曼光谱
化学工程
石墨
苯酚
材料科学
有机化学
冶金
吸附
工程类
物理
光学
生物
电信
计算机科学
生态学
作者
Yu Chen,Han Han,Mengqiuzi Yin,Xiao Wang,Xiao-Song He,Qiwu Zhang
标识
DOI:10.1021/acs.iecr.1c03292
摘要
Soil contaminated by polycyclic aromatic hydrocarbons (PAHs) is a common problem in the world. Mechanochemical treatment is a promising technology for remediation of PAH-contaminated soil. This study investigated the feasibility of pyrene degradation with silica by mechanochemical remediation. The effects of ball milling time and rotation speed on the removal efficiency of pyrene in soil were also studied. When the milling time was 3 h and the rotation speed was 500 rpm, the removal efficiency of pyrene in soil was over 98%. The intermediate products detected by gas chromatography–mass spectrometry proved that the hydrogenation reaction and the destruction of benzene rings occurred in the milling process. Both graphite and amorphous carbon were detected by Raman spectra. The main degradation pathway and mechanism of pyrene by mechanochemical treatment should be the destruction of benzene rings caused by free radicals and further carbonization.
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