Using Magnetically Responsive Tea Waste to Remove Lead in Waters under Environmentally Relevant Conditions

Handle URI:
http://hdl.handle.net/10754/550214
Title:
Using Magnetically Responsive Tea Waste to Remove Lead in Waters under Environmentally Relevant Conditions
Authors:
Yeo, Siang Yee; Choi, Siwon; Dien, Vivian; Sow-Peh, Yoke Keow; Qi, Genggeng; Hatton, T. Alan; Doyle, Patrick S.; Thio, Beng Joo Reginald
Abstract:
We report the use of a simple yet highly effective magnetite-waste tea composite to remove lead(II) (Pb2+) ions from water. Magnetite-waste tea composites were dispersed in four different types of water–deionized (DI), artificial rainwater, artificial groundwater and artificial freshwater–that mimic actual environmental conditions. The water samples had varying initial concentrations (0.16–5.55 ppm) of Pb2+ ions and were mixed with the magnetite-waste tea composite for at least 24 hours to allow adsorption of the Pb2+ ions to reach equilibrium. The magnetite-waste tea composites were stable in all the water samples for at least 3 months and could be easily removed from the aqueous media via the use of permanent magnets. We detected no significant leaching of iron (Fe) ions into the water from the magnetite-waste tea composites. The percentage of Pb adsorbed onto the magnetite-waste tea composite ranged from ~70% to 100%; the composites were as effective as activated carbon (AC) in removing the Pb2+ ions from water, depending on the initial Pb concentration. Our prepared magnetite-waste tea composites show promise as a green, inexpensive and highly effective sorbent for removal of Pb in water under environmentally realistic conditions.
Citation:
Using Magnetically Responsive Tea Waste to Remove Lead in Waters under Environmentally Relevant Conditions 2013, 8 (6):e66648 PLoS ONE
Publisher:
Public Library of Science (PLoS)
Journal:
PLoS ONE
Issue Date:
20-Jun-2013
DOI:
10.1371/journal.pone.0066648
PubMed ID:
23818955
PubMed Central ID:
PMC3688597
Type:
Article
ISSN:
1932-6203
Additional Links:
http://dx.plos.org/10.1371/journal.pone.0066648
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorYeo, Siang Yeeen
dc.contributor.authorChoi, Siwonen
dc.contributor.authorDien, Vivianen
dc.contributor.authorSow-Peh, Yoke Keowen
dc.contributor.authorQi, Genggengen
dc.contributor.authorHatton, T. Alanen
dc.contributor.authorDoyle, Patrick S.en
dc.contributor.authorThio, Beng Joo Reginalden
dc.date.accessioned2015-04-16T13:55:40Zen
dc.date.available2015-04-16T13:55:40Zen
dc.date.issued2013-06-20en
dc.identifier.citationUsing Magnetically Responsive Tea Waste to Remove Lead in Waters under Environmentally Relevant Conditions 2013, 8 (6):e66648 PLoS ONEen
dc.identifier.issn1932-6203en
dc.identifier.pmid23818955en
dc.identifier.doi10.1371/journal.pone.0066648en
dc.identifier.urihttp://hdl.handle.net/10754/550214en
dc.description.abstractWe report the use of a simple yet highly effective magnetite-waste tea composite to remove lead(II) (Pb2+) ions from water. Magnetite-waste tea composites were dispersed in four different types of water–deionized (DI), artificial rainwater, artificial groundwater and artificial freshwater–that mimic actual environmental conditions. The water samples had varying initial concentrations (0.16–5.55 ppm) of Pb2+ ions and were mixed with the magnetite-waste tea composite for at least 24 hours to allow adsorption of the Pb2+ ions to reach equilibrium. The magnetite-waste tea composites were stable in all the water samples for at least 3 months and could be easily removed from the aqueous media via the use of permanent magnets. We detected no significant leaching of iron (Fe) ions into the water from the magnetite-waste tea composites. The percentage of Pb adsorbed onto the magnetite-waste tea composite ranged from ~70% to 100%; the composites were as effective as activated carbon (AC) in removing the Pb2+ ions from water, depending on the initial Pb concentration. Our prepared magnetite-waste tea composites show promise as a green, inexpensive and highly effective sorbent for removal of Pb in water under environmentally realistic conditions.en
dc.publisherPublic Library of Science (PLoS)en
dc.relation.urlhttp://dx.plos.org/10.1371/journal.pone.0066648en
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
dc.titleUsing Magnetically Responsive Tea Waste to Remove Lead in Waters under Environmentally Relevant Conditionsen
dc.typeArticleen
dc.identifier.journalPLoS ONEen
dc.identifier.pmcidPMC3688597en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionEngineering Product Development, Singapore University of Technology and Design, Singapore, Singaporeen
dc.contributor.institutionDepartment of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of Americaen
dc.contributor.institutionDepartment of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of Americaen
dc.contributor.institutionScience Department, Hwa Chong Institution (High School), Singapore, Singaporeen
dc.contributor.institutionCornell University, Ithaca, New York, United States of Americaen
kaust.authorQi, Genggengen
kaust.grant.fundedcenterKAUST-Cornell Center for Energy and Sustainabilityen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.