Enhancement of lead removal from soil by in-situ release of dissolved organic matters from biochar in electrokinetic remediation

Liu, Q; Zhang, Q; Jiang, S; Du, Z; Zhang, X; Chen, H; Cao, W; Nghiem, LD; Ngo, HH

Enhancement of lead removal from soil by in-situ release of dissolved organic matters from biochar in electrokinetic remediation

Liu, Q Zhang, Q Jiang, S Du, Z Zhang, X Chen, H Cao, W Nghiem, LD Ngo, HH

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Journal of Cleaner Production, 2022, 361
Issue Date:: 2022-08-10

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Field	Value	Language
dc.contributor.author	Liu, Q
dc.contributor.author	Zhang, Q
dc.contributor.author	Jiang, S
dc.contributor.author	Du, Z
dc.contributor.author	Zhang, X
dc.contributor.author	Chen, H
dc.contributor.author	Cao, W
dc.contributor.author	Nghiem, LD
dc.contributor.author	Ngo, HH
dc.date.accessioned	2023-01-19T04:59:29Z
dc.date.available	2023-01-19T04:59:29Z
dc.date.issued	2022-08-10
dc.identifier.citation	Journal of Cleaner Production, 2022, 361
dc.identifier.issn	0959-6526
dc.identifier.issn	1879-1786
dc.identifier.uri	http://hdl.handle.net/10453/165229
dc.description.abstract	This study investigated the release of dissolved organic matters (DOMs) from biochar under DC electric field and the roles of the released DOMs on the removal of heavy metal lead (Pb) from the soil coupled with electrokinetic (EK) remediation. The fluorescence excitation and emission matrix spectra (EEM) analysis suggested biochar could discharge more DOMs under the DC field, while biochar from 300 °C (B300) could release much more DOMs than biochar obtained under the 500 °C and 700 °C (B500 and B700). The major component of the released DOMs was likely the humic-like substances, which exhibited a strong ability to complex with Pb and extract them from the soil matrix. By using B300 as a permeable reactive barrier (PRB) to combine with EK under 0.96 V cm−1, Pb migration rates in the soil and the global Pb removal were improved by about 2.8-fold and 1.1-fold, respectively. By employing B700 as another PRB, installed close to the cathode of reactor, the migration rate and removal of Pb could be greatly enhanced. This study provides new insights into the biochar application for sustainable EK remediation of the soil contaminated with heavy metal species.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Journal of Cleaner Production
dc.relation.isbasedon	10.1016/j.jclepro.2022.132294
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0907 Environmental Engineering, 0910 Manufacturing Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Environmental Sciences
dc.title	Enhancement of lead removal from soil by in-situ release of dissolved organic matters from biochar in electrokinetic remediation
dc.type	Journal Article
utslib.citation.volume	361
utslib.for	0907 Environmental Engineering
utslib.for	0910 Manufacturing Engineering
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2024-08-01T00:00:00+1000Z
dc.date.updated	2023-01-19T04:59:28Z
pubs.publication-status	Published
pubs.volume	361

Abstract:

This study investigated the release of dissolved organic matters (DOMs) from biochar under DC electric field and the roles of the released DOMs on the removal of heavy metal lead (Pb) from the soil coupled with electrokinetic (EK) remediation. The fluorescence excitation and emission matrix spectra (EEM) analysis suggested biochar could discharge more DOMs under the DC field, while biochar from 300 °C (B300) could release much more DOMs than biochar obtained under the 500 °C and 700 °C (B500 and B700). The major component of the released DOMs was likely the humic-like substances, which exhibited a strong ability to complex with Pb and extract them from the soil matrix. By using B300 as a permeable reactive barrier (PRB) to combine with EK under 0.96 V cm−1, Pb migration rates in the soil and the global Pb removal were improved by about 2.8-fold and 1.1-fold, respectively. By employing B700 as another PRB, installed close to the cathode of reactor, the migration rate and removal of Pb could be greatly enhanced. This study provides new insights into the biochar application for sustainable EK remediation of the soil contaminated with heavy metal species.

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http://hdl.handle.net/10453/165229