环境科学学报
環境科學學報
배경과학학보
ACTA SCIENTIAE CIRCUMSTANTIAE
2001年
2期
152-156
,共5页
夏晔%杜慧芳%许丽红%杨竹仙%周祖铭
夏曄%杜慧芳%許麗紅%楊竹仙%週祖銘
하엽%두혜방%허려홍%양죽선%주조명
中空纤维%膜萃取%铈%二(2-乙基己基)磷酸
中空纖維%膜萃取%鈰%二(2-乙基己基)燐痠
중공섬유%막췌취%시%이(2-을기기기)린산
研究了在中空纤维膜萃取器中二（2-乙基己基）磷酸（HDEHP）萃取铈(Ⅲ)的动力学，通过测定水相和有机相流速，水相铈(Ⅲ)浓度、酸度和有机相HDEHP浓度，得出了萃取速率的规律.实验结果表明，在本实验条件下，萃取速率为界面化学反应控制，Ce3+与第一个HDEHP二聚体离子HA2-的配位反应是萃取速率的控制步骤.
研究瞭在中空纖維膜萃取器中二（2-乙基己基）燐痠（HDEHP）萃取鈰(Ⅲ)的動力學，通過測定水相和有機相流速，水相鈰(Ⅲ)濃度、痠度和有機相HDEHP濃度，得齣瞭萃取速率的規律.實驗結果錶明，在本實驗條件下，萃取速率為界麵化學反應控製，Ce3+與第一箇HDEHP二聚體離子HA2-的配位反應是萃取速率的控製步驟.
연구료재중공섬유막췌취기중이（2-을기기기）린산（HDEHP）췌취시(Ⅲ)적동역학，통과측정수상화유궤상류속，수상시(Ⅲ)농도、산도화유궤상HDEHP농도，득출료췌취속솔적규률.실험결과표명，재본실험조건하，췌취속솔위계면화학반응공제，Ce3+여제일개HDEHP이취체리자HA2-적배위반응시췌취속솔적공제보취.
The kinetics of solvent extraction of Ce(Ⅲ) with di (2-ethylhexyl) phosphoric acid (HDEHP) using a microporous hydrophobic hollow fiber membrane extractor has been investigated. By examining the effects of flow velocities of aqueous and organic phase, Ce(Ⅲ)and hydrogen ion concentrations in aqueous phase, HDEHP concentration in organic phase and temperature on extraction rate of Ce(Ⅲ), the regularity of extraction rate was obtained. The experimental results indicated that the extraction rate is controlled by chemical reaction on interface under the experimental conditions and the reaction between Ce(Ⅲ) ion and the first dimeric polymer ion of HDEHP (HA-2) might be the rate-controlling step.
