中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2015年
5期
1387-1393
,共7页
周文辉%胡久刚%唐晖%李娅%付明波%孙乐行%陈启元
週文輝%鬍久剛%唐暉%李婭%付明波%孫樂行%陳啟元
주문휘%호구강%당휘%리아%부명파%손악행%진계원
液/液界面%铜萃取%离子转移%电化学
液/液界麵%銅萃取%離子轉移%電化學
액/액계면%동췌취%리자전이%전화학
liquid/liquid interface%copper extraction%ion transfer%electrochemistry
为了研究铜的萃取过程,通过构建互不相溶微孔界面电化学方法,研究Cu2+在水/1,2?二氯乙烷界面上与LIX84I的配位转移过程,获得Cu2+与LIX84的扩散动力学参数和界面转移机理。结果表明:当LIX84配体浓度过量时,萃取过程中Cu2+从水相线性扩散至界面的过程为控制步骤,并与LIX84I在界面发生配位反应后,铜配合物以球形扩散迁移至有机相中;当Cu2+离子过量时,LIX84I从有机相球形扩散至两相界面与Cu2+配位后,铜配合物也以球形扩散迁移至有机相中。Cu2+与LIX84I的萃取过程在两相界面进行,符合界面络合转移和界面离解转移的扩散机理。
為瞭研究銅的萃取過程,通過構建互不相溶微孔界麵電化學方法,研究Cu2+在水/1,2?二氯乙烷界麵上與LIX84I的配位轉移過程,穫得Cu2+與LIX84的擴散動力學參數和界麵轉移機理。結果錶明:噹LIX84配體濃度過量時,萃取過程中Cu2+從水相線性擴散至界麵的過程為控製步驟,併與LIX84I在界麵髮生配位反應後,銅配閤物以毬形擴散遷移至有機相中;噹Cu2+離子過量時,LIX84I從有機相毬形擴散至兩相界麵與Cu2+配位後,銅配閤物也以毬形擴散遷移至有機相中。Cu2+與LIX84I的萃取過程在兩相界麵進行,符閤界麵絡閤轉移和界麵離解轉移的擴散機理。
위료연구동적췌취과정,통과구건호불상용미공계면전화학방법,연구Cu2+재수/1,2?이록을완계면상여LIX84I적배위전이과정,획득Cu2+여LIX84적확산동역학삼수화계면전이궤리。결과표명:당LIX84배체농도과량시,췌취과정중Cu2+종수상선성확산지계면적과정위공제보취,병여LIX84I재계면발생배위반응후,동배합물이구형확산천이지유궤상중;당Cu2+리자과량시,LIX84I종유궤상구형확산지량상계면여Cu2+배위후,동배합물야이구형확산천이지유궤상중。Cu2+여LIX84I적췌취과정재량상계면진행,부합계면락합전이화계면리해전이적확산궤리。
In order to study the copper extraction process, based on the electrochemical methods for ion transfer at micro-oil/water interface, the transfer process of Cu2+ assisted by LIX84I at the water/1, 2-dichloroethane interface was investigated. The dynamics parameters of the extraction process and the transfer mechanism of copper(II) were obtained. The results indicate that, when the LIX84I is excess, Cu2+ transfers from aqueous phase to oil/water interface and complexes with LIX84I controlled by a linear diffusion, whereas, the transfer process of LIX84I from the organic phase to oil/water interface and complex with Cu2+ controlled by spherical diffusion when Cu2+ is greatly excess. In both cases, the Cu2+ complexes transfer to the organic phase with a spherical diffusion. The Cu2+ complexes form at interface with an interface complexation transfer and interface dissociative transfer mechanism.