教師資料查詢 | 類別: 期刊論文 | 教師: 李奇旺 Chi-Wang Li (瀏覽個人網頁)

標題:Integration of ceramic membrane and compressed air-assisted solvent extraction (CASX) for metal recovery
學年98
學期2
出版(發表)日期2010/06/01
作品名稱Integration of ceramic membrane and compressed air-assisted solvent extraction (CASX) for metal recovery
作品名稱(其他語言)
著者Li, Chi-wang; Chiu, Chun-hao; Lee, Yu-cheng; Chang, Chia-hao; Lee, Yu-hsun; Chen, Yi-ming
單位淡江大學水資源及環境工程學系
出版者London: I W A Publishing
著錄名稱、卷期、頁數Water Science and Technology 62(6), pp.1274-1280
摘要In our previous publications, compressed air-assisted solvent extraction process (CASX) was developed and proved to be kinetically efficient process for metal removal. In the current study, CASX with a ceramic MF membrane integrated for separation of spent solvent was employed to remove and recover metal from wastewater. MF was operated either in crossflow mode or dead-end with intermittent flushing mode. Under crossflow mode, three distinct stages of flux vs. TMP (trans-membrane pressure) relationship were observed. In the first stage, flux increases with increasing TMP which is followed by the stage of stable flux with increasing TMP. After reaching a threshold TMP which is dependent of crossflow velocity, flux increases again with increasing TMP. At the last stage, solvent was pushed through membrane pores as indicated by increasing permeate COD. In dead-end with intermittent flushing mode, an intermittent flushing flow (2 min after a 10-min or a 30-min dead-end filtration) was incorporated to reduce membrane fouling by flush out MSAB accumulated on membrane surface. Effects of solvent concentration and composition were also investigated. Solvent concentrations ranging from 0.1 to 1% (w/w) have no adverse effect in terms of membrane fouling. However, solvent composition, i.e. D(2)EHPA/kerosene ratio, shows impact on membrane fouling. The type of metal extractants employed in CASX has significant impact on both membrane fouling and the quality of filtrate due to the differences in their viscosity and water solubility. Separation of MSAB was the limiting process controlling metal removal efficiency, and the removal efficiency of Cd(II) and Cr(VI) followed the same trend as that for COD.
關鍵字ceramic membrane; dead-end filtration; recovery; solvent
語言英文
ISSN0273-1223
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Li, Chi-wang
審稿制度
國別英國
公開徵稿
出版型式紙本
相關連結
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