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    題名: Compressed air-assisted solvent extraction (CASX) for metal removal
    作者: 李奇旺;Li, Chi-wang;Chen, Yi-ming;Hsiao, Shin-tien
    貢獻者: 淡江大學水資源及環境工程學系
    關鍵詞: pressurization;extraction;Cr(VI);Cd(II);D2EHPA;aliquat 336
    日期: 2008-03
    上傳時間: 2010-03-26 16:33:35 (UTC+8)
    出版者: Oxford: Pergamon
    摘要: 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 10 s. When synthetic wastewater containing Cd(II) of 50 mg l(-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. (c) 2007 Elsevier Ltd. All rights reserved.
    關聯: Chemosphere 71(1), pp.51-58
    DOI: 10.1016/j.chemosphere.2007.10.050
    顯示於類別:[水資源及環境工程學系暨研究所] 期刊論文

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