Investigating the mechanisms of biochar's removal of lead from solution

Wang, Z; Liu, G; Zheng, H; Li, F; Ngo, HH; Guo, W; Liu, C; Chen, L; Xing, B

Investigating the mechanisms of biochar's removal of lead from solution

Wang, Z Liu, G Zheng, H Li, F Ngo, HH

Guo, W

Liu, C Chen, L Xing, B

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Publication Type:: Journal Article
Citation:: Bioresource Technology, 2015, 177 pp. 308 - 317
Issue Date:: 2015-02-01

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Field	Value	Language
dc.contributor.author	Wang, Z	en_US
dc.contributor.author	Liu, G	en_US
dc.contributor.author	Zheng, H	en_US
dc.contributor.author	Li, F	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858	en_US
dc.contributor.author	Liu, C	en_US
dc.contributor.author	Chen, L	en_US
dc.contributor.author	Xing, B	en_US
dc.date.available	2014-11-18	en_US
dc.date.issued	2015-02-01	en_US
dc.identifier.citation	Bioresource Technology, 2015, 177 pp. 308 - 317	en_US
dc.identifier.issn	0960-8524	en_US
dc.identifier.uri	http://hdl.handle.net/10453/33340
dc.identifier.uri	http://hdl.handle.net/10453/37493
dc.description.abstract	© 2014 Elsevier Ltd. The objective of this study was to investigate the relationship between Pb2+ adsorption and physicochemical properties of biochars produced at different pyrolytic temperatures. Ten biochars were prepared from peanut shell (PS) and Chinese medicine material residue (MR) at 300-600°C. Adsorption kinetics and isotherms were determined, and the untreated and Pb2+-loaded biochars were analyzed by FTIR, SEM-EDX and XRD. Functional groups complexation, Pb2+-π interaction and precipitation with minerals jointly contributed to Pb2+ adsorption on these biochars. New mineral precipitates (e.g., Pb2(SO4)O and Pb4(CO3)2(SO4)(OH)2) formed during Pb2+ sorption. For high-temperature biochars (≥500°C), Pb2+ sorption via complexation reduced, but the contribution of Pb2+-π interaction was enhanced. Dramatic reduction of Pb2+ sorption on demineralized biochars indicated the dominant role of minerals. These results are useful for screening effective biochars as engineered sorbents to remove or immobilize Pb2+ in polluted water and soil.	en_US
dc.relation.ispartof	Bioresource Technology	en_US
dc.relation.isbasedon	10.1016/j.biortech.2014.11.077	en_US
dc.subject.classification	Biotechnology	en_US
dc.subject.mesh	Arachis hypogaea	en_US
dc.subject.mesh	Charcoal	en_US
dc.subject.mesh	Oxygen	en_US
dc.subject.mesh	Lead	en_US
dc.subject.mesh	Minerals	en_US
dc.subject.mesh	Drugs, Chinese Herbal	en_US
dc.subject.mesh	Solutions	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Temperature	en_US
dc.subject.mesh	Kinetics	en_US
dc.subject.mesh	Adsorption	en_US
dc.subject.mesh	Hydrogen-Ion Concentration	en_US
dc.subject.mesh	Time Factors	en_US
dc.subject.mesh	Chemical Precipitation	en_US
dc.subject.mesh	Arachis	en_US
dc.title	Investigating the mechanisms of biochar's removal of lead from solution	en_US
dc.type	Journal Article
utslib.citation.volume	177	en_US
utslib.for	0904 Chemical Engineering	en_US
pubs.embargo.period	Not known	en_US
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.publication-status	Published	en_US
pubs.volume	177	en_US

Abstract:

© 2014 Elsevier Ltd. The objective of this study was to investigate the relationship between Pb2+ adsorption and physicochemical properties of biochars produced at different pyrolytic temperatures. Ten biochars were prepared from peanut shell (PS) and Chinese medicine material residue (MR) at 300-600°C. Adsorption kinetics and isotherms were determined, and the untreated and Pb2+-loaded biochars were analyzed by FTIR, SEM-EDX and XRD. Functional groups complexation, Pb2+-π interaction and precipitation with minerals jointly contributed to Pb2+ adsorption on these biochars. New mineral precipitates (e.g., Pb2(SO4)O and Pb4(CO3)2(SO4)(OH)2) formed during Pb2+ sorption. For high-temperature biochars (≥500°C), Pb2+ sorption via complexation reduced, but the contribution of Pb2+-π interaction was enhanced. Dramatic reduction of Pb2+ sorption on demineralized biochars indicated the dominant role of minerals. These results are useful for screening effective biochars as engineered sorbents to remove or immobilize Pb2+ in polluted water and soil.

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http://hdl.handle.net/10453/33340