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Rate equation of antisynergic extraction of cadmium with D2EHDTPA-TOA

文献类型：期刊论文

作者Zhang, DL; Lu, LZ; Ke, JJ
刊名ACTA PHYSICO-CHIMICA SINICA
出版日期2004-03-01
卷号20期号:3页码:275-279
ISSN号1000-6818
关键词rate equation dynamics interphase transfer thio-substituted organophosphoric acid antisynergic extraction
其他题名Acta Phys.-Chim. Sin.
中文摘要The kinetics of antisynergic extraction of cadmium with D2EHDTPA (di-(2-ethylhexyl)-dithiophosphoric acid)-TOA(trioctylamine) under the condition of interfacial reaction controlling model was investigated by using an improved constant interfacial area stirred cell. The extraction course was composed of several interphase transfer processes (transfer between bulk phase and interfacial phase (or boundary phase)) and several chemical reactions. The extraction rate equation was: r = 1.42 x 10(-7)[Cd2+](0.42)[BHA](O)(0.47)/[B](O)(0.85)[H+](0.21) (mol . m(-2) . s(-1)) The interfacial concentration was associated with the bulk concentration by using Freundlich adsorption equation. The concentration exponents in the extraction rate equation were decided by the two factors of the interfacial chemical reactions and the interphase transfer processes. The physical meaning of the fractional reaction order in the rate equation was analyzed. The bigger the Freundlich power n of a reactant, the more the repulsion exerted by the interfacial layer. The apparent extraction activation energy E = 44.2 kJ . mol(-1), the extraction enthalpy DeltaH = 72.9 kJ . mol(-1). The inconsistency in extraction mechanism due to different interface models was also discussed.
英文摘要The kinetics of antisynergic extraction of cadmium with D2EHDTPA (di-(2-ethylhexyl)-dithiophosphoric acid)-TOA(trioctylamine) under the condition of interfacial reaction controlling model was investigated by using an improved constant interfacial area stirred cell. The extraction course was composed of several interphase transfer processes (transfer between bulk phase and interfacial phase (or boundary phase)) and several chemical reactions. The extraction rate equation was:
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]KINETICS
收录类别SCI
原文出处://WOS:000220362600012
语种英语
WOS记录号WOS:000220362600012
公开日期2013-11-05
版本出版稿
源URL[http://ir.ipe.ac.cn/handle/122111/5006]  
专题过程工程研究所_研究所（批量导入）
作者单位1.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China
2.Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, DL,Lu, LZ,Ke, JJ. Rate equation of antisynergic extraction of cadmium with D2EHDTPA-TOA[J]. ACTA PHYSICO-CHIMICA SINICA,2004,20(3):275-279.
APA Zhang, DL,Lu, LZ,&Ke, JJ.(2004).Rate equation of antisynergic extraction of cadmium with D2EHDTPA-TOA.ACTA PHYSICO-CHIMICA SINICA,20(3),275-279.
MLA Zhang, DL,et al."Rate equation of antisynergic extraction of cadmium with D2EHDTPA-TOA".ACTA PHYSICO-CHIMICA SINICA 20.3(2004):275-279.

入库方式： OAI收割

来源：过程工程研究所

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