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Article: Effects of humic acid on recoverability and fractal structure of alum-kaolin flocs

TitleEffects of humic acid on recoverability and fractal structure of alum-kaolin flocs
Authors
Issue Date2011
PublisherIOS Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.php
Citation
Journal Of Environmental Sciences, 2011, v. 23 n. 5, p. 731-737 How to Cite?
AbstractParticle surface characteristics, floc recoverability and fractal structure of alum-kaolin flocs were investigated using in situ particle image velocimetry (PIV) and microbalance with or without humic acid. Experimental results indicated that the zeta potential of kaolin particle surface after adsorption of humic acid was related with humic acid concentration and its acid-base buffering capacity. Adsorption of humic acid resulted in more negative electrophoresis on the particle surface. Coagulant dosages for particles to form flocs would increase with increasing humic concentration. PIV was used to evaluate floc structural fragmentation, floc surface erosion as well as recoverability after high shear. It was found that the floc size during the steady phase of growth was small, while the regrowing capability decreased in the presence of humic acid. The recoverability was closely related with floc breakage modes including floc structural fragmentation and floc surface erosion. The fractal dimensions of alum-kaolin flocs by mass-size method based on microbalance would decrease with increasing humic concentration. This study proved that humic acid had adverse influences on the performance of coagulation process. © 2011 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
Persistent Identifierhttp://hdl.handle.net/10722/150572
ISSN
2015 Impact Factor: 2.208
2015 SCImago Journal Rankings: 0.832
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China20721140019
U0773002
National High Technology Research and Development Program (863) of China2002AA601120
Funding Information:

This work was supported by the National Natural Science Foundation of China (No. 20721140019, U0773002) and the National High Technology Research and Development Program (863) of China (No. 2002AA601120).

References

 

DC FieldValueLanguage
dc.contributor.authorZhong, Ren_US
dc.contributor.authorZhang, Xen_US
dc.contributor.authorXiao, Fen_US
dc.contributor.authorLi, Xen_US
dc.date.accessioned2012-06-26T06:05:51Z-
dc.date.available2012-06-26T06:05:51Z-
dc.date.issued2011en_US
dc.identifier.citationJournal Of Environmental Sciences, 2011, v. 23 n. 5, p. 731-737en_US
dc.identifier.issn1001-0742en_US
dc.identifier.urihttp://hdl.handle.net/10722/150572-
dc.description.abstractParticle surface characteristics, floc recoverability and fractal structure of alum-kaolin flocs were investigated using in situ particle image velocimetry (PIV) and microbalance with or without humic acid. Experimental results indicated that the zeta potential of kaolin particle surface after adsorption of humic acid was related with humic acid concentration and its acid-base buffering capacity. Adsorption of humic acid resulted in more negative electrophoresis on the particle surface. Coagulant dosages for particles to form flocs would increase with increasing humic concentration. PIV was used to evaluate floc structural fragmentation, floc surface erosion as well as recoverability after high shear. It was found that the floc size during the steady phase of growth was small, while the regrowing capability decreased in the presence of humic acid. The recoverability was closely related with floc breakage modes including floc structural fragmentation and floc surface erosion. The fractal dimensions of alum-kaolin flocs by mass-size method based on microbalance would decrease with increasing humic concentration. This study proved that humic acid had adverse influences on the performance of coagulation process. © 2011 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.en_US
dc.languageengen_US
dc.publisherIOS Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.phpen_US
dc.relation.ispartofJournal of Environmental Sciencesen_US
dc.subject.meshAdsorptionen_US
dc.subject.meshAlum Compounds - Chemistryen_US
dc.subject.meshFlocculationen_US
dc.subject.meshFractalsen_US
dc.subject.meshHumic Substances - Analysisen_US
dc.subject.meshHydrogen-Ion Concentrationen_US
dc.subject.meshKaolin - Chemistryen_US
dc.subject.meshNephelometry And Turbidimetryen_US
dc.subject.meshOsmolar Concentrationen_US
dc.subject.meshRheologyen_US
dc.subject.meshStatic Electricityen_US
dc.subject.meshSurface Propertiesen_US
dc.titleEffects of humic acid on recoverability and fractal structure of alum-kaolin flocsen_US
dc.typeArticleen_US
dc.identifier.emailZhang, X: xihuizh@mail.tsinghua.edu.cnen_US
dc.identifier.emailLi, X:xlia@hkucc.hku.hk-
dc.identifier.authorityLi, X=rp00222en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S1001-0742(10)60468-8en_US
dc.identifier.pmid21790043-
dc.identifier.scopuseid_2-s2.0-79958783530en_US
dc.identifier.hkuros209073-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79958783530&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume23en_US
dc.identifier.issue5en_US
dc.identifier.spage731en_US
dc.identifier.epage737en_US
dc.identifier.isiWOS:000290884000005-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridZhong, R=24170418700en_US
dc.identifier.scopusauthoridZhang, X=36112333200en_US
dc.identifier.scopusauthoridXiao, F=35243870400en_US
dc.identifier.scopusauthoridLi, X=26642887900en_US

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