| Enhanced removal of organics by permanganate preoxidation using tannic acid as a model compound--role of in situ formed manganese dioxide. | |
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MedLine Citation:
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PMID: 19862950 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of permanganate preoxidation on organic matter removal during the coagulation with aluminum chloride was investigated using tannic acid as a model compound. Results showed that a small amount of KMnO4 (0.75 mg/L) increased the removal efficiency of tannic acid up to 20%, as compared to the process of coagulation by aluminum chloride alone. The key factor enhancing the removal efficiency of tannic acid in preoxidation process was the in situ formation of a reductant manganese dioxide. The complexation model was used to describe the reaction between MnO2 and tannic acid. Under weak pH condition, tannic acid was difficult to be adsorbed by MnO2 due to the static electrical repulsive forces. The presence of Ca2+ served as a bridge to hold the negative charged MnO2 and tannic acid together, which could be a crucial factor influencing tannic acid adsorption by in-situ manganese dioxide. |
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Authors:
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Lizhu Zhang; Jun Ma; Xin Li; Shutao Wang |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of environmental sciences (China) Volume: 21 ISSN: 1001-0742 ISO Abbreviation: J Environ Sci (China) Publication Date: 2009 |
Date Detail:
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Created Date: 2009-10-29 Completed Date: 2009-11-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100967627 Medline TA: J Environ Sci (China) Country: Netherlands |
Other Details:
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Languages: eng Pagination: 872-6 Citation Subset: IM |
Affiliation:
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School of Science, Harbin Institute of Technology, Harbin 150090, China. zlz4513@sina.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Manganese Compounds
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chemistry* Oxidation-Reduction Oxides / chemistry* Tannins / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Manganese Compounds; 0/Oxides; 0/Tannins; 1313-13-9/manganese dioxide; 14333-13-2/permanganic acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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