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

Quan Gan; Huijie Hou; Sha Liang; Jingjing Qiu; Shuangyi Tao; Liang Yang; Wenbo Yu; Keke Xiao; Bingchuan Liu; Jingping Hu; Yanfei Wang; Jiakuan Yang

doi:10.1016/j.scitotenv.2020.138299

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

Quan Gan, Huijie Hou, Sha Liang^*, Jingjing Qiu, Shuangyi Tao, Liang Yang, Wenbo Yu, Keke Xiao, Bingchuan Liu, Jingping Hu, Yanfei Wang, Jiakuan Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

102 Scopus citations

Abstract

Fe-rich biochar with multivalent iron compounds (Fe⁰, Fe_0.95C_0.05, 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 Fe⁰ and Fe_0.95C_0.05, 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.

Original language	English
Article number	138299
Journal	Science of the Total Environment
Volume	725
DOIs	https://doi.org/10.1016/j.scitotenv.2020.138299
State	Published - 10 Jul 2020
Externally published	Yes

Keywords

4-Chlorophenol degradation
Fe-rich biochar
Fenton catalyst
Multivalent iron compounds
Sewage sludge

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10.1016/j.scitotenv.2020.138299

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title = "Sludge-derived biochar with multivalent iron as an efficient Fenton catalyst for degradation of 4-Chlorophenol",

abstract = "Fe-rich biochar with multivalent iron compounds (Fe0, 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 Fe0 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.",

keywords = "4-Chlorophenol degradation, Fe-rich biochar, Fenton catalyst, Multivalent iron compounds, Sewage sludge",

author = "Quan Gan and Huijie Hou and Sha Liang and Jingjing Qiu and Shuangyi Tao and Liang Yang and Wenbo Yu and Keke Xiao and Bingchuan Liu and Jingping Hu and Yanfei Wang and Jiakuan Yang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = jul,

day = "10",

doi = "10.1016/j.scitotenv.2020.138299",

language = "英语",

volume = "725",

journal = "Science of the Total Environment",

issn = "0048-9697",

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TY - JOUR

T1 - Sludge-derived biochar with multivalent iron as an efficient Fenton catalyst for degradation of 4-Chlorophenol

AU - Gan, Quan

AU - Hou, Huijie

AU - Liang, Sha

AU - Qiu, Jingjing

AU - Tao, Shuangyi

AU - Yang, Liang

AU - Yu, Wenbo

AU - Xiao, Keke

AU - Liu, Bingchuan

AU - Hu, Jingping

AU - Wang, Yanfei

AU - Yang, Jiakuan

PY - 2020/7/10

Y1 - 2020/7/10

N2 - Fe-rich biochar with multivalent iron compounds (Fe0, 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 Fe0 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.

AB - Fe-rich biochar with multivalent iron compounds (Fe0, 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 Fe0 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.

KW - 4-Chlorophenol degradation

KW - Fe-rich biochar

KW - Fenton catalyst

KW - Multivalent iron compounds

KW - Sewage sludge

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U2 - 10.1016/j.scitotenv.2020.138299

DO - 10.1016/j.scitotenv.2020.138299

M3 - 文章

C2 - 32278183

AN - SCOPUS:85082766766

SN - 0048-9697

VL - 725

JO - Science of the Total Environment

JF - Science of the Total Environment

M1 - 138299

ER -

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

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