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dc.contributor.authorShen, Mohai
dc.contributor.authorYin, Yong-guang
dc.contributor.authorBooth, Andy
dc.contributor.authorLiu, Jingfu
dc.date.accessioned2017-11-20T19:55:29Z
dc.date.available2017-11-20T19:55:29Z
dc.date.created2014-10-14T19:32:57Z
dc.date.issued2015
dc.identifier.citationWater Research. 2015, 71 11-20.nb_NO
dc.identifier.issn0043-1354
dc.identifier.urihttp://hdl.handle.net/11250/2467228
dc.description.abstractGiven the wide presence of heterogeneous natural organic matter (NOM) and metal ions (Naþ/Ca2þ/Mg2þ), as well as their significant role in governing nanoparticle stability in aqueous environments, it is of great importance to understand how the molecular weight (MW)-dependent physicochemical properties of NOM impact fundamental transportation processes like the aggregation of engineered nanoparticles (ENPs) in the presence of Naþ/Ca2þ/Mg2þ. Here, we report on the aggregation behavior of a model ENP, fullerene nanoparticles (nC60) in the presence of five MW fractions of Suwannee River NOM (Mf-SRNOMs, separated by ultrafiltration techniques) and three electrolytes (NaCl, CaCl2 and MgCl2). We found that in all NaCl treatments and low concentration CaCl2/MgCl2 treatments, the enhancement of nC60 stability positively correlated with the MW of Mf-SRNOMs. Whereas, the stability efficiency of identical Mf-SRNOM in different electrolytes followed an order of NaCl > MgCl2 > CaCl2, and the enhanced attachment of nC60-SRNOM associations was observed in high MW Mf-SRNOM (SRNOM>100 kD and SRNOM 30e100 kD) at high concentration CaCl2/MgCl2. Our results indicate that although the high MW NOM with large humic-like material is the key component for stabilizing nC60 in monovalent electrolyte, it could play a reversed role in promoting the attachment of nC60, especially in long term aggregations and at high concentrations of divalent cations. Therefore, a detailed understanding of the effects of heterogeneous NOM on the aggregation of ENPs should be highly valued, and properly assessed against different cation species and concentrations.nb_NO
dc.language.isoengnb_NO
dc.rightsNavngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/deed.no*
dc.subjectNatural organic matter (NOM)nb_NO
dc.subjectMolecular weight (MW)nb_NO
dc.subjectFullerene nanoparticles (nC60)nb_NO
dc.subjectAggregationnb_NO
dc.subjectElectrolytesnb_NO
dc.titleEffects of molecular weight-dependent physicochemical heterogeneity of natural organic matter on the aggregation of fullerene nanoparticles in mono- and di-valent electrolyte solutionsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holderThe authorsnb_NO
dc.source.pagenumber11-20nb_NO
dc.source.volume71nb_NO
dc.source.journalWater Researchnb_NO
dc.identifier.doi10.1016/j.watres.2014.12.025
dc.identifier.cristin1164057
dc.relation.projectNorges forskningsråd: 209685nb_NO
cristin.unitcode7566,6,0,0
cristin.unitnameMiljøteknologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal
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