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Article: Binding characteristics of copper and cadmium by cyanobacterium Spirulina platensis

TitleBinding characteristics of copper and cadmium by cyanobacterium Spirulina platensis
Authors
KeywordsCd(II)
Chemical modifications
Cu(II)
Sequestration mechanisms
Spirulina platensis
XAFS
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhazmat
Citation
Journal Of Hazardous Materials, 2011, v. 190 n. 1-3, p. 810-815 How to Cite?
AbstractCyanobacteria are promising biosorbent for heavy metals in bioremediation. Although sequestration of metals by cyanobacteria is known, the actual mechanisms and ligands involved are not very well understood. The binding characteristics of Cu(II) and Cd(II) by the cyanobacterium Spirulina platensis were investigated using a combination of chemical modifications, batch adsorption experiments, Fourier transform infrared (FTIR) spectroscopy and X-ray absorption fine structure (XAFS) spectroscopy. A significant increase in Cu(II) and Cd(II) binding was observed in the range of pH 3.5-5.0. Dramatical decrease in adsorption of Cu(II) and Cd(II) was observed after methanol esterification of the nonliving cells demonstrating that carboxyl functional groups play an important role in the binding of metals by S. platensis. The desorption rate of Cu(II) and Cd(II) from S. platensis surface was 72.7-80.7% and 53.7-58.0% by EDTA and NH 4NO 3, respectively, indicating that ion exchange and complexation are the dominating mechanisms for Cu(II) and Cd(II) adsorption. XAFS analysis provided further evidence on the inner-sphere complexation of Cu by carboxyl ligands and showed that Cu is complexed by two 5-membered chelate rings on S. platensis surface. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/140904
ISSN
2015 Impact Factor: 4.836
2015 SCImago Journal Rankings: 1.692
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science of Foundation of China40825002
Huazhong Agricultural University Scientific & Technological Self-innovation Foundation2009YB005
Funding Information:

This work was financially supported by the National Natural Science of Foundation of China (40825002) and Huazhong Agricultural University Scientific & Technological Self-innovation Foundation (2009YB005). We gratefully acknowledge Dr. Bo He and Dr. Zhi Xie (NSRL, USTC, China) for their helpful technical assistance of XAFS experiments. We also thank Dr. Torbjorn Karlsson from Swedish University of Agricultural Sciences for XAFS data processing.

References

 

DC FieldValueLanguage
dc.contributor.authorFang, Len_HK
dc.contributor.authorZhou, Cen_HK
dc.contributor.authorCai, Pen_HK
dc.contributor.authorChen, Wen_HK
dc.contributor.authorRong, Xen_HK
dc.contributor.authorDai, Ken_HK
dc.contributor.authorLiang, Wen_HK
dc.contributor.authorGu, JDen_HK
dc.contributor.authorHuang, Qen_HK
dc.date.accessioned2011-09-23T06:21:17Z-
dc.date.available2011-09-23T06:21:17Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Hazardous Materials, 2011, v. 190 n. 1-3, p. 810-815en_HK
dc.identifier.issn0304-3894en_HK
dc.identifier.urihttp://hdl.handle.net/10722/140904-
dc.description.abstractCyanobacteria are promising biosorbent for heavy metals in bioremediation. Although sequestration of metals by cyanobacteria is known, the actual mechanisms and ligands involved are not very well understood. The binding characteristics of Cu(II) and Cd(II) by the cyanobacterium Spirulina platensis were investigated using a combination of chemical modifications, batch adsorption experiments, Fourier transform infrared (FTIR) spectroscopy and X-ray absorption fine structure (XAFS) spectroscopy. A significant increase in Cu(II) and Cd(II) binding was observed in the range of pH 3.5-5.0. Dramatical decrease in adsorption of Cu(II) and Cd(II) was observed after methanol esterification of the nonliving cells demonstrating that carboxyl functional groups play an important role in the binding of metals by S. platensis. The desorption rate of Cu(II) and Cd(II) from S. platensis surface was 72.7-80.7% and 53.7-58.0% by EDTA and NH 4NO 3, respectively, indicating that ion exchange and complexation are the dominating mechanisms for Cu(II) and Cd(II) adsorption. XAFS analysis provided further evidence on the inner-sphere complexation of Cu by carboxyl ligands and showed that Cu is complexed by two 5-membered chelate rings on S. platensis surface. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jhazmaten_HK
dc.relation.ispartofJournal of Hazardous Materialsen_HK
dc.subjectCd(II)en_HK
dc.subjectChemical modificationsen_HK
dc.subjectCu(II)en_HK
dc.subjectSequestration mechanismsen_HK
dc.subjectSpirulina platensisen_HK
dc.subjectXAFSen_HK
dc.subject.meshAdsorption-
dc.subject.meshCadmium - isolation and purification-
dc.subject.meshCopper - isolation and purification-
dc.subject.meshEnvironmental Remediation - methods-
dc.subject.meshSpirulina - chemistry-
dc.titleBinding characteristics of copper and cadmium by cyanobacterium Spirulina platensisen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0304-3894&volume=190&issue=1-3&spage=810&epage=815&date=2011&atitle=Binding+characteristics+of+copper+and+cadmium+by+cyanobacterium+Spirulina+platensis-
dc.identifier.emailGu, JD: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityGu, JD=rp00701en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jhazmat.2011.03.122en_HK
dc.identifier.pmid21514723-
dc.identifier.scopuseid_2-s2.0-79956159761en_HK
dc.identifier.hkuros194838en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79956159761&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume190en_HK
dc.identifier.issue1-3en_HK
dc.identifier.spage810en_HK
dc.identifier.epage815en_HK
dc.identifier.isiWOS:000292427800104-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridFang, L=25822507200en_HK
dc.identifier.scopusauthoridZhou, C=53265293500en_HK
dc.identifier.scopusauthoridCai, P=34568234900en_HK
dc.identifier.scopusauthoridChen, W=53263346200en_HK
dc.identifier.scopusauthoridRong, X=13102733600en_HK
dc.identifier.scopusauthoridDai, K=7103099303en_HK
dc.identifier.scopusauthoridLiang, W=7402026719en_HK
dc.identifier.scopusauthoridGu, JD=7403129601en_HK
dc.identifier.scopusauthoridHuang, Q=7403634341en_HK

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