Immobilization of heavy metals in electroplating sludge by biochar and iron sulfide.

Lyu, H; Gong, Y; Tang, J; Huang, Y; Wang, Q

Immobilization of heavy metals in electroplating sludge by biochar and iron sulfide.

Lyu, H Gong, Y Tang, J Huang, Y Wang, Q

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Publisher:: SPRINGER HEIDELBERG
Publication Type:: Journal Article
Citation:: Environ Sci Pollut Res Int, 2016, 23, (14), pp. 14472-14488
Issue Date:: 2016-07

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Field	Value	Language
dc.contributor.author	Lyu, H
dc.contributor.author	Gong, Y
dc.contributor.author	Tang, J
dc.contributor.author	Huang, Y
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.date.accessioned	2022-08-02T22:47:43Z
dc.date.available	2016-04-03
dc.date.available	2022-08-02T22:47:43Z
dc.date.issued	2016-07
dc.identifier.citation	Environ Sci Pollut Res Int, 2016, 23, (14), pp. 14472-14488
dc.identifier.issn	0944-1344
dc.identifier.issn	1614-7499
dc.identifier.uri	http://hdl.handle.net/10453/159512
dc.description.abstract	Electroplating sludge (ES) containing large quantities of heavy metals is regarded as a hazardous waste in China. This paper introduced a simple method of treating ES using environmentally friendly fixatives biochar (BC) and iron sulfide (FeS), respectively. After 3 days of treatment with FeS at a FeS-to-ES mass ratio of 1:5, the toxicity characteristic leaching procedure (TCLP)-based leachability of total Cr (TCr), Cu(II), Ni(II), Pb(II), and Zn(II) was decreased by 59.6, 100, 63.8, 73.5, and 90.5 %, respectively. After 5 days of treatment with BC at a BC-to-ES mass ratio of 1:2, the TCLP-based leachability was declined by 35.1, 30.6, 22.3, 23.1, and 22.4 %, respectively. Pseudo first-order kinetic model adequately simulated the sorption kinetic data. Structure and morphology analysis showed that adsorption, electrostatic attraction, surface complexation, and chemical precipitation were dominant mechanisms for heavy metals immobilization by BC, and that chemical precipitation (formation of metal sulfide and hydroxide precipitates), iron exchange (formation of CuFeS2), and surface complexation were mainly responsible for heavy metals removal by FeS. Economic costs of BC and FeS were 500 and 768 CNY/t, lower than that of Na2S (940 CNY/t). The results suggest that BC and FeS are effective, economic, and environmentally friendly fixatives for immobilization of heavy metals in ES before landfill disposal.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	SPRINGER HEIDELBERG
dc.relation.ispartof	Environ Sci Pollut Res Int
dc.relation.isbasedon	10.1007/s11356-016-6621-5
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 05 Environmental Sciences, 06 Biological Sciences
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Adsorption
dc.subject.mesh	Charcoal
dc.subject.mesh	Electroplating
dc.subject.mesh	Hazardous Waste
dc.subject.mesh	Iron
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Sewage
dc.subject.mesh	Sulfides
dc.subject.mesh	Sulfides
dc.subject.mesh	Charcoal
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Iron
dc.subject.mesh	Hazardous Waste
dc.subject.mesh	Sewage
dc.subject.mesh	Adsorption
dc.subject.mesh	Electroplating
dc.title	Immobilization of heavy metals in electroplating sludge by biochar and iron sulfide.
dc.type	Journal Article
utslib.citation.volume	23
utslib.location.activity	Germany
utslib.for	03 Chemical Sciences
utslib.for	05 Environmental Sciences
utslib.for	06 Biological Sciences
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	closed_access	*
dc.date.updated	2022-08-02T22:47:40Z
pubs.issue	14
pubs.publication-status	Published
pubs.volume	23
utslib.citation.issue	14

Abstract:

Electroplating sludge (ES) containing large quantities of heavy metals is regarded as a hazardous waste in China. This paper introduced a simple method of treating ES using environmentally friendly fixatives biochar (BC) and iron sulfide (FeS), respectively. After 3 days of treatment with FeS at a FeS-to-ES mass ratio of 1:5, the toxicity characteristic leaching procedure (TCLP)-based leachability of total Cr (TCr), Cu(II), Ni(II), Pb(II), and Zn(II) was decreased by 59.6, 100, 63.8, 73.5, and 90.5 %, respectively. After 5 days of treatment with BC at a BC-to-ES mass ratio of 1:2, the TCLP-based leachability was declined by 35.1, 30.6, 22.3, 23.1, and 22.4 %, respectively. Pseudo first-order kinetic model adequately simulated the sorption kinetic data. Structure and morphology analysis showed that adsorption, electrostatic attraction, surface complexation, and chemical precipitation were dominant mechanisms for heavy metals immobilization by BC, and that chemical precipitation (formation of metal sulfide and hydroxide precipitates), iron exchange (formation of CuFeS2), and surface complexation were mainly responsible for heavy metals removal by FeS. Economic costs of BC and FeS were 500 and 768 CNY/t, lower than that of Na2S (940 CNY/t). The results suggest that BC and FeS are effective, economic, and environmentally friendly fixatives for immobilization of heavy metals in ES before landfill disposal.

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http://hdl.handle.net/10453/159512