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Conference Paper: Adsorption of heavy metals by EPS of activated sludge

TitleAdsorption of heavy metals by EPS of activated sludge
Authors
KeywordsActivated sludge
Adsorption
EPS
Extracellular polymeric substances
Heavy metals
Issue Date2001
PublisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
Citation
The 2000 International Specialist Conference on Extracellular Polymeric Substances. In Water Science And Technology, 2001, v. 43 n. 6, p. 59-66 How to Cite?
AbstractExtracellular polymeric substances (EPSs) were extracted by high-speed centrifugation at 20,000 G for 30 min from an activated sludge treating municipal wastewater. Each gram of sludge, as measured in volatile suspended solids (VSS), contained 7.3 mg of EPS, including 6.5 mg of protein (EPSp) and 0.8 mg of carbohydrate (EPSc). The EPS p had a man MW OF 2.0×105; about 18% of EPSp had MW over 5×104 and 16% below 5×103. For heavy metal concentrations ranging 10-100 mg/l, EPS on average removed 99% of Zn2+, 98% of Cu2+, 97% of Cr3+, 85% of Cd2+, 69% of Co2+, 37% of Ni2+, and 26% of CrO42-. The relative degrees of metal removals were inconsistent with those reported for the activated sludge process. Each mg of ESP had the capacity to remove up to 1.48 mg of Zn2+, 1.12 mg of Cu2+, 0.83 mg of Cr3+, 0.90 mg of Cd2+, 1.10 mg of Co2+, 0.25 mg each of Ni2+ and CrO42-. Results suggest the feasibility of recovering ESP from waste sludge for use as adsorbent. Freundlich isotherm correlated satisfactorily with the adsorption data of Ni2+, Cu2+, Cd2+, and CrO42- (R2 ranging 0.89-0.97), whereas Langmuir isotherm correlated satisfactorily with those of Zn2+, Cr3r and Ni2+ (R2 ranging 0.93-0.960). Both correlated poorly for those of Co2+.
Persistent Identifierhttp://hdl.handle.net/10722/152118
ISSN
2015 Impact Factor: 1.064
2015 SCImago Journal Rankings: 0.469
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, Yen_US
dc.contributor.authorLam, MCen_US
dc.contributor.authorFang, HHPen_US
dc.date.accessioned2012-06-26T06:35:17Z-
dc.date.available2012-06-26T06:35:17Z-
dc.date.issued2001en_US
dc.identifier.citationThe 2000 International Specialist Conference on Extracellular Polymeric Substances. In Water Science And Technology, 2001, v. 43 n. 6, p. 59-66en_US
dc.identifier.issn0273-1223en_US
dc.identifier.urihttp://hdl.handle.net/10722/152118-
dc.description.abstractExtracellular polymeric substances (EPSs) were extracted by high-speed centrifugation at 20,000 G for 30 min from an activated sludge treating municipal wastewater. Each gram of sludge, as measured in volatile suspended solids (VSS), contained 7.3 mg of EPS, including 6.5 mg of protein (EPSp) and 0.8 mg of carbohydrate (EPSc). The EPS p had a man MW OF 2.0×105; about 18% of EPSp had MW over 5×104 and 16% below 5×103. For heavy metal concentrations ranging 10-100 mg/l, EPS on average removed 99% of Zn2+, 98% of Cu2+, 97% of Cr3+, 85% of Cd2+, 69% of Co2+, 37% of Ni2+, and 26% of CrO42-. The relative degrees of metal removals were inconsistent with those reported for the activated sludge process. Each mg of ESP had the capacity to remove up to 1.48 mg of Zn2+, 1.12 mg of Cu2+, 0.83 mg of Cr3+, 0.90 mg of Cd2+, 1.10 mg of Co2+, 0.25 mg each of Ni2+ and CrO42-. Results suggest the feasibility of recovering ESP from waste sludge for use as adsorbent. Freundlich isotherm correlated satisfactorily with the adsorption data of Ni2+, Cu2+, Cd2+, and CrO42- (R2 ranging 0.89-0.97), whereas Langmuir isotherm correlated satisfactorily with those of Zn2+, Cr3r and Ni2+ (R2 ranging 0.93-0.960). Both correlated poorly for those of Co2+.en_US
dc.languageengen_US
dc.publisherIWA Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwsten_US
dc.relation.ispartofWater Science and Technologyen_US
dc.rightsWater Science and Technology. Copyright © IWA Publishing.-
dc.rights©IWA Publishing 2001. The definitive peer-reviewed and edited version of this article is published in Water Science and Technology, v. 43 n. 6, p. 59-66, and is available at www.iwapublishing.com-
dc.subjectActivated sludge-
dc.subjectAdsorption-
dc.subjectEPS-
dc.subjectExtracellular polymeric substances-
dc.subjectHeavy metals-
dc.subject.meshAdsorptionen_US
dc.subject.meshBiopolymers - Chemistryen_US
dc.subject.meshExtracellular Matrix - Chemistryen_US
dc.subject.meshMetals, Heavy - Isolation & Purificationen_US
dc.subject.meshSewage - Chemistryen_US
dc.subject.meshWaste Disposal, Fluiden_US
dc.subject.meshWater Pollutants, Chemical - Isolation & Purificationen_US
dc.titleAdsorption of heavy metals by EPS of activated sludgeen_US
dc.typeConference_Paperen_US
dc.identifier.emailFang, HHP:hrechef@hkucc.hku.hken_US
dc.identifier.authorityFang, HHP=rp00115en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid11381973en_US
dc.identifier.scopuseid_2-s2.0-0035223105en_US
dc.identifier.hkuros60437-
dc.identifier.hkuros60304-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035223105&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume43en_US
dc.identifier.issue6en_US
dc.identifier.spage59en_US
dc.identifier.epage66en_US
dc.identifier.isiWOS:000168639400009-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLiu, Y=36013132500en_US
dc.identifier.scopusauthoridLam, MC=23983215900en_US
dc.identifier.scopusauthoridFang, HHP=7402542625en_US
dc.customcontrol.immutablesml 151113 - merged-

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