Remediation of soil contaminated with PAHs and γ-HCH using Fenton oxidation activated by carboxymethyl cellulose-modified iron oxide-biochar

被引：26

作者：

Gao, Yue ^{[1
]}

Xue, Yanan ^{[1
]}

Zhen, Kai ^{[1
]}

Guo, Jiacheng ^{[1
]}

Tang, Xuejiao ^{[1
]}

Zhang, Peng ^{[1
]}

Wang, Cuiping ^{[1
]}

Sun, Hongwen ^{[1
]}

Wu, Jizhou ^{[2
]}

机构：

[1] Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Control, Coll Environm Sci & Engn,Minist Educ, Tianjin 300071, Peoples R China

[2] Jingcheng Testing Co Ltd, Natl Testing & Certificat Int Grp, Guangzhou 511400, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2023年 / 453卷

基金：

中国博士后科学基金;

关键词：

PAHs; gamma-HCH; Field soil remediation; Carboxymethyl cellulose; Electron transfer; DISSOLVED ORGANIC-MATTER; MAGNETIC BIOCHAR; WASTE-WATER; CATALYST; NANOPARTICLES; DEGRADATION; EFFICIENT; REDUCTION; PEROXYMONOSULFATE; NANOCOMPOSITE;

D O I：

10.1016/j.jhazmat.2023.131450

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The remediation of soil contaminated with hydrophobic organic pollutants has attracted great public concern. In the present study, a novel catalyst using biochar supported ferro ferric oxide modified by carboxymethyl cellulose (CMC-Fe3O4/BC) was developed to activate the Fenton reaction for hazardous hydrophobic organic pollutants, and the degradation mechanisms were analyzed in terms of free radicals, electron transfer pathways and degradation intermediates. The results showed that the CMC-Fe3O4/BC-activated H2O2 system degraded nearly 100% of pyrene in the aqueous system after a 1440-min reaction. The catalyst was also applied to remediate industrial field soil contaminated with PAHs and gamma-HCH. The removal rate of the total pollutants reached 61.1% after a 10-day reaction, which was higher than that of Fe3O4/BC without modification. CMC enabled the Fe3O4 particles to more equably distribute on the BC surface, further effectively activating H2O2 to generate more center dot OH and forming different degradation products compared to the Fe3O4/BC. Additionally, the CMC-Fe3O4/BC-

引用

页数：10

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