Sludge-derived biochar with multivalent iron as an ef ficient Fenton catalyst for degradation of 4-Chlorophenol

被引：122

作者：

Gan, Quan ^{[1
,4
]}

Hou, Huijie ^{[1
,2
]}

Liang, Sha ^{[1
,2
]}

Qiu, Jingjing ^{[1
]}

Tao, Shuangyi ^{[1
]}

Yang, Liang ^{[1
]}

Yu, Wenbo ^{[1
]}

Xiao, Keke ^{[1
,2
]}

Liu, Bingchuan ^{[1
,2
]}

Hu, Jingping ^{[1
,2
]}

Wang, Yanfei ^{[5
]}

Yang, Jiakuan ^{[1
,2
,3
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Hubei, Peoples R China

[2] Hubei Prov Engn Lab Solid Waste Treatment Disposa, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China

[3] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China

[4] CCCC FHDI Engn Co Ltd, Guangzhou 510230, Guangdong, Peoples R China

[5] Wuhan Sanzhen Ind Holding Co Ltd, Wuhan 430074, Hubei, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2020年 / 725卷

基金：

美国国家科学基金会;

关键词：

Sewage sludge; Fe-rich biochar; Multivalent iron compounds; Fenton catalyst; 4-Chlorophenol degradation; ENHANCED HYDROGEN-PRODUCTION; SEWAGE-SLUDGE; RED MUD; ENVIRONMENTAL APPLICATIONS; HETEROGENEOUS CATALYST; CONTROLLED REDUCTION; OXIDATION; REAGENT; CARBON; ADSORPTION;

D O I：

10.1016/j.scitotenv.2020.138299

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Fe-rich biochar with multivalent iron compounds (Fe-0, Fe0.95C0.05, Fe3O4, and FeAl2O4) pyrolyzed from sludge cake conditioned with Fenton's reagent and red mud was utilized as an efficient Fenton catalyst for the degradation of 4-chlorophenol (4-CP). Effects of pyrolysis temperature and sludge conditioner composition on the transformation of iron compounds were studied. Both homogeneous Fenton reaction initiated by Fe2+ leached from both low-valent Fe-0 and Fe0.95C0.05, and heterogeneous Fenton reaction initiated by solid iron phases of Fe3O4 and FeAl2O4 were revealed to contribute to the degradation of 4-CP. The removal efficiency of 4-CP remained 100% after five successive degradation rounds. The homogeneous Fenton reaction mainly works in the first degradation round, and the heterogeneous Fenton reaction dominates in subsequent degradation rounds. The findings of this study suggest that sewage sludge derived Fe-rich biochar could be utilized as an efficient Fenton catalyst for recalcitrant organics degradation. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：11

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