Effect of NaX zeolite-modified graphite felts on hexavalent chromium removal in biocathode microbial fuel cells

Xiayuan Wu; Fei Tong; Xiaoyu Yong; Jun Zhou; Lixiong Zhang; Honghua Jia; Ping Wei

doi:10.1016/j.jhazmat.2016.01.070

Effect of NaX zeolite-modified graphite felts on hexavalent chromium removal in biocathode microbial fuel cells

Xiayuan Wu, Fei Tong, Xiaoyu Yong, Jun Zhou, Lixiong Zhang, Honghua Jia, Ping Wei

Jiangsu University of Technology

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

54 Scopus citations

Abstract

Two kinds of NaX zeolite-modified graphite felts were used as biocathode electrodes in hexavalent chromium (Cr(VI))-reducing microbial fuel cells (MFCs). The one was fabricated through direct modification, and the other one processed by HNO₃ pretreatment of graphite felt before modification. The results showed that two NaX zeolite-modified graphite felts are excellent bio-electrode materials for MFCs, and that a large NaX loading mass, obtained by HNO₃ pretreatment (the HNO₃-NaX electrode), leads to a superior performance. The HNO₃-NaX electrode significantly improved the electricity generation and Cr(VI) removal of the MFC. The maximum Cr(VI) removal rate increased to 10.39 ± 0.28 mg/L h, which was 8.2 times higher than that of the unmodified control. The improvement was ascribed to the strong affinity that NaX zeolite particles, present in large number on the graphite felt, have for microorganisms and Cr(VI) ions.

Original language	English
Pages (from-to)	303-311
Number of pages	9
Journal	Journal of Hazardous Materials
Volume	308
DOIs	https://doi.org/10.1016/j.jhazmat.2016.01.070
State	Published - 5 May 2016

Keywords

Biocathode
Cr(VI) removal
Microbial fuel cell
NaX
Zeolite-modifed electrode

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10.1016/j.jhazmat.2016.01.070

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title = "Effect of NaX zeolite-modified graphite felts on hexavalent chromium removal in biocathode microbial fuel cells",

abstract = "Two kinds of NaX zeolite-modified graphite felts were used as biocathode electrodes in hexavalent chromium (Cr(VI))-reducing microbial fuel cells (MFCs). The one was fabricated through direct modification, and the other one processed by HNO3 pretreatment of graphite felt before modification. The results showed that two NaX zeolite-modified graphite felts are excellent bio-electrode materials for MFCs, and that a large NaX loading mass, obtained by HNO3 pretreatment (the HNO3-NaX electrode), leads to a superior performance. The HNO3-NaX electrode significantly improved the electricity generation and Cr(VI) removal of the MFC. The maximum Cr(VI) removal rate increased to 10.39 ± 0.28 mg/L h, which was 8.2 times higher than that of the unmodified control. The improvement was ascribed to the strong affinity that NaX zeolite particles, present in large number on the graphite felt, have for microorganisms and Cr(VI) ions.",

keywords = "Biocathode, Cr(VI) removal, Microbial fuel cell, NaX, Zeolite-modifed electrode",

author = "Xiayuan Wu and Fei Tong and Xiaoyu Yong and Jun Zhou and Lixiong Zhang and Honghua Jia and Ping Wei",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

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doi = "10.1016/j.jhazmat.2016.01.070",

language = "英语",

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T1 - Effect of NaX zeolite-modified graphite felts on hexavalent chromium removal in biocathode microbial fuel cells

AU - Wu, Xiayuan

AU - Tong, Fei

AU - Yong, Xiaoyu

AU - Zhou, Jun

AU - Zhang, Lixiong

AU - Jia, Honghua

AU - Wei, Ping

PY - 2016/5/5

Y1 - 2016/5/5

N2 - Two kinds of NaX zeolite-modified graphite felts were used as biocathode electrodes in hexavalent chromium (Cr(VI))-reducing microbial fuel cells (MFCs). The one was fabricated through direct modification, and the other one processed by HNO3 pretreatment of graphite felt before modification. The results showed that two NaX zeolite-modified graphite felts are excellent bio-electrode materials for MFCs, and that a large NaX loading mass, obtained by HNO3 pretreatment (the HNO3-NaX electrode), leads to a superior performance. The HNO3-NaX electrode significantly improved the electricity generation and Cr(VI) removal of the MFC. The maximum Cr(VI) removal rate increased to 10.39 ± 0.28 mg/L h, which was 8.2 times higher than that of the unmodified control. The improvement was ascribed to the strong affinity that NaX zeolite particles, present in large number on the graphite felt, have for microorganisms and Cr(VI) ions.

AB - Two kinds of NaX zeolite-modified graphite felts were used as biocathode electrodes in hexavalent chromium (Cr(VI))-reducing microbial fuel cells (MFCs). The one was fabricated through direct modification, and the other one processed by HNO3 pretreatment of graphite felt before modification. The results showed that two NaX zeolite-modified graphite felts are excellent bio-electrode materials for MFCs, and that a large NaX loading mass, obtained by HNO3 pretreatment (the HNO3-NaX electrode), leads to a superior performance. The HNO3-NaX electrode significantly improved the electricity generation and Cr(VI) removal of the MFC. The maximum Cr(VI) removal rate increased to 10.39 ± 0.28 mg/L h, which was 8.2 times higher than that of the unmodified control. The improvement was ascribed to the strong affinity that NaX zeolite particles, present in large number on the graphite felt, have for microorganisms and Cr(VI) ions.

KW - Biocathode

KW - Cr(VI) removal

KW - Microbial fuel cell

KW - NaX

KW - Zeolite-modifed electrode

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DO - 10.1016/j.jhazmat.2016.01.070

M3 - 文章

C2 - 26852205

AN - SCOPUS:84957033201

SN - 0304-3894

VL - 308

SP - 303

EP - 311

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

ER -

Effect of NaX zeolite-modified graphite felts on hexavalent chromium removal in biocathode microbial fuel cells

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Keywords

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