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dc.contributor.authorZhao, Min
dc.contributor.authorWang, Sen
dc.contributor.authorWang, Hongsheng
dc.contributor.authorQin, Peirui
dc.contributor.authorYang, Dongjiang
dc.contributor.authorSun, Yuanyuan
dc.contributor.authorKong, Fanlong
dc.date.accessioned2019-08-29T00:53:45Z
dc.date.available2019-08-29T00:53:45Z
dc.date.issued2019
dc.identifier.issn0269-7491
dc.identifier.doi10.1016/j.envpol.2019.02.040
dc.identifier.urihttp://hdl.handle.net/10072/386759
dc.description.abstractConstructed wetlands are an environmentally friendly and economically efficient sewage treatment technology, with fillers playing an important role in treatment processes. However, traditional wetland fillers (e.g. zeolite) are known to be imperfect because of their low adsorption capacity. In this paper, the adsorbent sodium titanate nano fillers (T3-F) was synthesized as an alternative to traditional filler with sodium titanate nanofibers (T3) as the raw material, epoxy adhesive as the adhesive agent and NH4HCO3 as the pore-making agent. The properties of T3-F were characterized by powder X-ray diffraction (XRD), scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDX), porosity. The effect of different parameters such as pH, co-existing ions, contact time, initial metal ion concentrations and temperature was investigated for heavy metal adsorption. The results showed that the adsorption of heavy metal by T3-F followed the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption capacities for Cu2+, Pb2+, Zn2+, Cd2+ were about 1.5-1.98 mmol/g, which were 4-5 times that of zeolite, the traditional commonly used filler. Moreover, T3-F could entrap toxic ions irreversibly and maintain structural stability in the adsorption process, which solved the issue of secondary pollution. In the presence of competing ions, the adsorption efficiency for Pb2+ was not reduced significantly. Adsorption was strongest at high pH. From the results and characterization, an adsorption mechanism was suggested. This study lays a foundation for the practical application of T3-F as a constructed wetland filler in the future.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom938
dc.relation.ispartofpageto946
dc.relation.ispartofjournalEnvironmental Pollution
dc.relation.ispartofvolume248
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchcode05
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.subject.keywordsEnvironmental Sciences & Ecology
dc.subject.keywordsConstructed wetland
dc.titleApplication of sodium titanate nanofibers as constructed wetland fillers for efficient removal of heavy metal ions from wastewater
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationZhao, M; Wang, S; Wang, H; Qin, P; Yang, D; Sun, Y; Kong, F, Application of sodium titanate nanofibers as constructed wetland fillers for efficient removal of heavy metal ions from wastewater, Environmental Pollution, 2019, 248, pp. 938-946
dcterms.dateAccepted2019-02-14
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2019-08-29T00:49:01Z
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorYang, Dongjiang


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