Selective copper recovery by membrane distillation and adsorption system from synthetic acid mine drainage.

Ryu, S; Naidu, G; Moon, H; Vigneswaran, S

Selective copper recovery by membrane distillation and adsorption system from synthetic acid mine drainage.

Ryu, S

Naidu, G Moon, H Vigneswaran, S

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Chemosphere, 2020, 260
Issue Date:: 2020-12

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Field	Value	Language
dc.contributor.author	Ryu, S https://orcid.org/0000-0003-3030-207X
dc.contributor.author	Naidu, G
dc.contributor.author	Moon, H
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322
dc.date.accessioned	2021-03-16T00:42:41Z
dc.date.available	2020-06-19
dc.date.available	2021-03-16T00:42:41Z
dc.date.issued	2020-12
dc.identifier.citation	Chemosphere, 2020, 260
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/147210
dc.description.abstract	Acid mine drainage (AMD) which involves high sulfur and heavy metals concentrations and furthermore are acidic in character, has been a major environmental and economic issue due to the associated toxicity and treatment costs. A large quantity of AMD in nature has a variety of resources including water and heavy metals such as Cu, Al, Fe and Ni. In this study, the valuable resource of Cu was selectively recovered from model AMD solution through membrane distillation and adsorption systems. Direct contact membrane distillation (DCMD) system enabled to concentrate the Cu concentration in AMD by more than 2.5 times while recovering 80% of high-quality water for reuse purposes. For adsorption, mesoporous silica material was used after multi-modification with Mn and amine grafting to enhance the adsorption capacity as well as selectivity for Cu. Under acidic conditions, heavy metals cannot be adsorbed on amine grafted SBA-15. Therefore, the pH of synthetic AMD (pH = 2.2) had to be adjusted to the 5.0-5.2 range, in order to enable adsorption of Cu on modified SBA-15 (this is to prevent protonation of amine groups grafted on prepared SBA-15). Moreover, an increase in pH helped to precipitate more than 99% of Fe and Al (predominant metals in AMD). Cu adsorption on modified SBA-15 was 24.53 mg/g for KOH-treated AMD. However, Cu adsorption on modified SBA-15 decreased by 26% (18.11 mg/g) for NaOH-treated AMD. Cu adsorption with modified SBA-15 significantly improved to 55.75 mg/g when the Cu concentration was concentrated by DCMD.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier BV
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2020.127528
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Acids
dc.subject.mesh	Adsorption
dc.subject.mesh	Copper
dc.subject.mesh	Distillation
dc.subject.mesh	Hydrogen-Ion Concentration
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Mining
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Acids
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Copper
dc.subject.mesh	Water Pollutants, Chemical
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Adsorption
dc.subject.mesh	Hydrogen-Ion Concentration
dc.subject.mesh	Mining
dc.subject.mesh	Distillation
dc.subject.mesh	Acids
dc.subject.mesh	Adsorption
dc.subject.mesh	Copper
dc.subject.mesh	Distillation
dc.subject.mesh	Hydrogen-Ion Concentration
dc.subject.mesh	Metals, Heavy
dc.subject.mesh	Mining
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Water Pollutants, Chemical
dc.title	Selective copper recovery by membrane distillation and adsorption system from synthetic acid mine drainage.
dc.type	Journal Article
utslib.citation.volume	260
utslib.location.activity	England
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	*
pubs.consider-herdc	false
dc.date.updated	2021-03-16T00:42:40Z
pubs.publication-status	Published
pubs.volume	260

Abstract:

Acid mine drainage (AMD) which involves high sulfur and heavy metals concentrations and furthermore are acidic in character, has been a major environmental and economic issue due to the associated toxicity and treatment costs. A large quantity of AMD in nature has a variety of resources including water and heavy metals such as Cu, Al, Fe and Ni. In this study, the valuable resource of Cu was selectively recovered from model AMD solution through membrane distillation and adsorption systems. Direct contact membrane distillation (DCMD) system enabled to concentrate the Cu concentration in AMD by more than 2.5 times while recovering 80% of high-quality water for reuse purposes. For adsorption, mesoporous silica material was used after multi-modification with Mn and amine grafting to enhance the adsorption capacity as well as selectivity for Cu. Under acidic conditions, heavy metals cannot be adsorbed on amine grafted SBA-15. Therefore, the pH of synthetic AMD (pH = 2.2) had to be adjusted to the 5.0-5.2 range, in order to enable adsorption of Cu on modified SBA-15 (this is to prevent protonation of amine groups grafted on prepared SBA-15). Moreover, an increase in pH helped to precipitate more than 99% of Fe and Al (predominant metals in AMD). Cu adsorption on modified SBA-15 was 24.53 mg/g for KOH-treated AMD. However, Cu adsorption on modified SBA-15 decreased by 26% (18.11 mg/g) for NaOH-treated AMD. Cu adsorption with modified SBA-15 significantly improved to 55.75 mg/g when the Cu concentration was concentrated by DCMD.

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http://hdl.handle.net/10453/147210