| Immobilization of mercury in sediment using stabilized iron sulfide nanoparticles. | |
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MedLine Citation:
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PMID: 19748651 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Mercury (Hg) immobilization using stabilized iron sulfide (FeS) nanoparticles was investigated through a series of batch and column experiments. The nanoparticles were prepared using a low-cost, food-grade cellulose (sodium carboxymethyl cellulose, CMC) as the stabilizer. The hydrodynamic diameter of fresh FeS-CMC nanoparticles was measured to be 38.5+/-5.4nm. Batch tests showed that the nanoparticles can effectively immobilize Hg in a clay loam sediment. The Hg distribution coefficient for the nanoparticles was determined to be 8930+/-1480L/g, which is >4 orders of magnitude greater than for the sediment. When the Hg-laden sediment was treated at an FeS-to-Hg molar ratio of 26.5, the Hg concentration leached into water was reduced by 97% and the TCLP (toxicity characteristic leaching procedure) leachability of Hg was reduced by 99%. Column tests showed that water-leachable mercury from the sediment containing 3120mg/L Hg was reduced by 67% and the TCLP leachability by >77% when the sediment was treated with 67 pore volumes (PVs) of a 0.5g/L FeS nanoparticle suspension. Column tests proved that the stabilized nanoparticles were highly mobile in the sediment and full breakthrough of the nanoparticles occurred at approximately 18 PVs. |
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Authors:
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Zhong Xiong; Feng He; Dongye Zhao; Mark O Barnett |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2009-08-22 |
Journal Detail:
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Title: Water research Volume: 43 ISSN: 1879-2448 ISO Abbreviation: Water Res. Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-12-01 Completed Date: 2010-02-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0105072 Medline TA: Water Res Country: England |
Other Details:
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Languages: eng Pagination: 5171-9 Citation Subset: IM |
Affiliation:
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Environmental Engineering Program, Department of Civil Engineering, Auburn University, Auburn, AL 36849, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Environmental Remediation
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methods Geologic Sediments / chemistry* Iron / analysis, chemistry* Kinetics Mercury / analysis*, chemistry Metal Nanoparticles / analysis, chemistry*, ultrastructure Sulfides / analysis, chemistry Water Pollutants, Chemical / analysis*, chemistry |
| Chemical | |
Reg. No./Substance:
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0/Sulfides; 0/Water Pollutants, Chemical; 7439-89-6/Iron; 7439-97-6/Mercury |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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