| Compressed air-assisted solvent extraction (CASX) for metal removal. | |
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MedLine Citation:
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PMID: 18068207 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A novel process, compressed air-assisted solvent extraction (CASX), was developed to generate micro-sized solvent-coated air bubbles (MSAB) for metal extraction. Through pressurization of solvent with compressed air followed by releasing air-oversaturated solvent into metal-containing wastewater, MSAB were generated instantaneously. The enormous surface area of MSAB makes extraction process extremely fast and achieves very high aqueous/solvent weight ratio (A/S ratio). CASX process completely removed Cr(VI) from acidic electroplating wastewater under A/S ratio of 115 and extraction time of less than 10s. When synthetic wastewater containing Cd(II) of 50mgl(-1) was treated, A/S ratios of higher than 714 and 1190 could be achieved using solvent with extractant/diluent weight ratio of 1:1 and 5:1, respectively. Also, MSAB have very different physical properties, such as size and density, compared to the emulsified solvent droplets, making separation and recovery of solvent from treated effluent very easy. |
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Authors:
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Chi-Wang Li; Yi-Ming Chen; Shin-Tien Hsiao |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-12-18 |
Journal Detail:
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Title: Chemosphere Volume: 71 ISSN: 0045-6535 ISO Abbreviation: Chemosphere Publication Date: 2008 Mar |
Date Detail:
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Created Date: 2008-02-18 Completed Date: 2008-06-04 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0320657 Medline TA: Chemosphere Country: England |
Other Details:
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Languages: eng Pagination: 51-8 Citation Subset: IM |
Affiliation:
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Department of Water Resources and Environmental Engineering, TamKang University, 151 Ying-Chuan Road, Tamsui 25137, Taipei County, Taiwan. chiwang@mail.tku.edu.tw |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Air* Hydrogen-Ion Concentration Metals / isolation & purification* Pressure Solvents / isolation & purification* |
| Chemical | |
Reg. No./Substance:
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0/Metals; 0/Solvents |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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