Simultaneous heavy metal removal and sludge deep dewatering with Fe(II) assisted electrooxidation technology

Shaogang Hu; Jingping Hu; Yingfei Sun; Qian Zhu; Longsheng Wu; Bingchuan Liu; Keke Xiao; Sha Liang; Jiakuan Yang; Huijie Hou

doi:10.1016/j.jhazmat.2020.124072

Simultaneous heavy metal removal and sludge deep dewatering with Fe(II) assisted electrooxidation technology

Shaogang Hu, Jingping Hu, Yingfei Sun, Qian Zhu, Longsheng Wu, Bingchuan Liu, Keke Xiao, Sha Liang, Jiakuan Yang, Huijie Hou^*

^*Corresponding author for this work

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

36 Scopus citations

Abstract

A hybrid sludge conditioning strategy with electrooxidation and Fe(II) addition was used for heavy metal removal from sewage sludge and industrial sludge, with simultaneous sludge dewatering and stabilization. With the addition of 82 mg/g DS Fe(II) and treatment time of 4.5 h, heavy metal removals of 72.95% and 78.49% for Cu, 66.29% and 84.26% for Zn, and 36.52% and 36.99% for Pb were achieved from sewage sludge and industrial sludge samples respectively. The system pH decreased to 2.33 and 2.98 and the oxidation–reduction potential (ORP) values increased to 435.90 mV and 480.60 mV in sewage sludge and industrial sludge samples, respectively, which was conducive to the desorption and dissolution of heavy metals from sludge structures and the degradation of the organic compounds that complexed with heavy metals. In addition, the hybrid conditioning process demonstrated excellent dewatering performance due to the efficient electrochemical disintegration of sludge flocs together with the coagulation of sludge particles by Fe(III) generated via electrooxidation. The strong acidic and oxidative environment produced by the enhanced electrooxidation process was also responsible for pathogen inactivation.

Original language	English
Article number	124072
Journal	Journal of Hazardous Materials
Volume	405
DOIs	https://doi.org/10.1016/j.jhazmat.2020.124072
State	Published - 5 Mar 2021
Externally published	Yes

Keywords

Electrochemical oxidation
Heavy metal distributions
Heavy metal removal
Sludge dewatering
Sludge stabilization

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10.1016/j.jhazmat.2020.124072

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title = "Simultaneous heavy metal removal and sludge deep dewatering with Fe(II) assisted electrooxidation technology",

abstract = "A hybrid sludge conditioning strategy with electrooxidation and Fe(II) addition was used for heavy metal removal from sewage sludge and industrial sludge, with simultaneous sludge dewatering and stabilization. With the addition of 82 mg/g DS Fe(II) and treatment time of 4.5 h, heavy metal removals of 72.95% and 78.49% for Cu, 66.29% and 84.26% for Zn, and 36.52% and 36.99% for Pb were achieved from sewage sludge and industrial sludge samples respectively. The system pH decreased to 2.33 and 2.98 and the oxidation–reduction potential (ORP) values increased to 435.90 mV and 480.60 mV in sewage sludge and industrial sludge samples, respectively, which was conducive to the desorption and dissolution of heavy metals from sludge structures and the degradation of the organic compounds that complexed with heavy metals. In addition, the hybrid conditioning process demonstrated excellent dewatering performance due to the efficient electrochemical disintegration of sludge flocs together with the coagulation of sludge particles by Fe(III) generated via electrooxidation. The strong acidic and oxidative environment produced by the enhanced electrooxidation process was also responsible for pathogen inactivation.",

keywords = "Electrochemical oxidation, Heavy metal distributions, Heavy metal removal, Sludge dewatering, Sludge stabilization",

author = "Shaogang Hu and Jingping Hu and Yingfei Sun and Qian Zhu and Longsheng Wu and Bingchuan Liu and Keke Xiao and Sha Liang and Jiakuan Yang and Huijie Hou",

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

year = "2021",

month = mar,

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doi = "10.1016/j.jhazmat.2020.124072",

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T1 - Simultaneous heavy metal removal and sludge deep dewatering with Fe(II) assisted electrooxidation technology

AU - Hu, Shaogang

AU - Hu, Jingping

AU - Sun, Yingfei

AU - Zhu, Qian

AU - Wu, Longsheng

AU - Liu, Bingchuan

AU - Xiao, Keke

AU - Liang, Sha

AU - Yang, Jiakuan

AU - Hou, Huijie

PY - 2021/3/5

Y1 - 2021/3/5

N2 - A hybrid sludge conditioning strategy with electrooxidation and Fe(II) addition was used for heavy metal removal from sewage sludge and industrial sludge, with simultaneous sludge dewatering and stabilization. With the addition of 82 mg/g DS Fe(II) and treatment time of 4.5 h, heavy metal removals of 72.95% and 78.49% for Cu, 66.29% and 84.26% for Zn, and 36.52% and 36.99% for Pb were achieved from sewage sludge and industrial sludge samples respectively. The system pH decreased to 2.33 and 2.98 and the oxidation–reduction potential (ORP) values increased to 435.90 mV and 480.60 mV in sewage sludge and industrial sludge samples, respectively, which was conducive to the desorption and dissolution of heavy metals from sludge structures and the degradation of the organic compounds that complexed with heavy metals. In addition, the hybrid conditioning process demonstrated excellent dewatering performance due to the efficient electrochemical disintegration of sludge flocs together with the coagulation of sludge particles by Fe(III) generated via electrooxidation. The strong acidic and oxidative environment produced by the enhanced electrooxidation process was also responsible for pathogen inactivation.

AB - A hybrid sludge conditioning strategy with electrooxidation and Fe(II) addition was used for heavy metal removal from sewage sludge and industrial sludge, with simultaneous sludge dewatering and stabilization. With the addition of 82 mg/g DS Fe(II) and treatment time of 4.5 h, heavy metal removals of 72.95% and 78.49% for Cu, 66.29% and 84.26% for Zn, and 36.52% and 36.99% for Pb were achieved from sewage sludge and industrial sludge samples respectively. The system pH decreased to 2.33 and 2.98 and the oxidation–reduction potential (ORP) values increased to 435.90 mV and 480.60 mV in sewage sludge and industrial sludge samples, respectively, which was conducive to the desorption and dissolution of heavy metals from sludge structures and the degradation of the organic compounds that complexed with heavy metals. In addition, the hybrid conditioning process demonstrated excellent dewatering performance due to the efficient electrochemical disintegration of sludge flocs together with the coagulation of sludge particles by Fe(III) generated via electrooxidation. The strong acidic and oxidative environment produced by the enhanced electrooxidation process was also responsible for pathogen inactivation.

KW - Electrochemical oxidation

KW - Heavy metal distributions

KW - Heavy metal removal

KW - Sludge dewatering

KW - Sludge stabilization

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DO - 10.1016/j.jhazmat.2020.124072

M3 - 文章

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AN - SCOPUS:85093976618

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JO - Journal of Hazardous Materials

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ER -

Simultaneous heavy metal removal and sludge deep dewatering with Fe(II) assisted electrooxidation technology

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Keywords

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