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| Rate equation of antisynergic extraction of cadmium with D2EHDTPA-TOA | |
| Alternative Title | Acta Phys.-Chim. Sin. |
| Zhang, DL; Lu, LZ; Ke, JJ | |
| 2004-03-01 | |
| Source Publication | ACTA PHYSICO-CHIMICA SINICA
 |
| ISSN | 1000-6818 |
| Volume | 20Issue:3Pages:275-279 |
| Abstract | 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.; 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: |
| Keyword | Rate Equation Dynamics Interphase Transfer Thio-substituted Organophosphoric Acid Antisynergic Extraction |
| Subtype | Article |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.3866/PKU.WHXB20040312 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | KINETICS |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| WOS ID | WOS:000220362600012 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/5006 |
| Collection | 研究所（批量导入） |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China 2.Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| D2EHDTPA_TOA反协同萃取镉的速（514KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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