Compressed air-assisted solvent extraction (CASX) for metal removal
學年 96
學期 2
出版（發表）日期 2008-03-01
作品名稱 Compressed air-assisted solvent extraction (CASX) for metal removal
作品名稱（其他語言）
著者 李奇旺; Li, Chi-wang; Chen, Yi-ming; Hsiao, Shin-tien
單位 淡江大學水資源及環境工程學系
出版者 Oxford: Pergamon
著錄名稱、卷期、頁數 Chemosphere 71(1), pp.51-58
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.
關鍵字 pressurization; extraction; Cr(VI); Cd(II); D2EHPA; aliquat 336
語言 en
ISSN 0045-6535
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度
國別 GBR
公開徵稿
出版型式
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