Kinetic Study of Cd(II) Ions Extraction Using Trioctylamine as Carrier in Bulk Liquid Membrane (BLM)

IF 1.2 Q3 MULTIDISCIPLINARY SCIENCES

Journal of Physical Science Pub Date : 2019-08-25 DOI:10.21315/jps2019.30.2.9

M. M. H. S. Buddin, Nur Athirah Azrai, Effi Aidur Roza Roseli, Farhana Wahet, A. Ahmad

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Abstract

of ions extraction using trioctylamine as in ABSTRACT: Simultaneous extraction and stripping of Cd(II) ions from aqueous solution by using bulk liquid membrane (BLM) was explored. This study was aimed to identify the conditions to achieve maximum Cd(II) ions removal and the reaction kinetics was thoroughly analysed. The membrane phase was made by using trioctylamine (TOA) and kerosene, as carrier and diluent, respectively. Meanwhile, the feed phase contained the targeted solute (CdCl 2 ) dissolved in a pH adjusted solution while ammonia was used as the stripping agent. To achieve maximum Cd(II) ions removal, the effect of carrier concentration, stirring speed as well as extraction time were studied. Experimental data obtained shows that 0.1 wt% TOA in kerosene, 400 rpm stirring speed and 4 h of extraction time resulted in highest removal of Cd(II) ions. Furthermore, it was identified that the extraction process across BLM prefers acidic condition (pH of 1). The capability of the system to extract Cd(II) ions from the feed phase was known by using dimensionless reduced concentration, R f where the maximum removal of Cd(II) ions achieved was 0.0193 at the mentioned conditions. The reaction kinetics were investigated to identify the reaction rate constants for extraction reaction (k 1 ) and stripping reaction (k 2 ). The value of k 1 and k 2 were found to be 0.94 h –1 and 2.45 h –1 , respectively.

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体积液膜中三辛基胺为载体萃取Cd(II)离子的动力学研究

摘要:研究了体积液膜法(BLM)同时萃取和剥离水溶液中的Cd(II)离子。本研究旨在确定最大限度去除Cd(II)离子的条件，并对反应动力学进行了全面分析。以三辛胺(TOA)为载体，以煤油为稀释液制备膜相。同时，进料相中含有目标溶质(CdCl 2)，溶解在pH调节的溶液中，氨作为汽提剂。为了最大限度地去除Cd(II)离子，研究了载体浓度、搅拌速度和萃取时间的影响。实验结果表明，当煤油中TOA浓度为0.1 wt%、搅拌转速为400 rpm、萃取时间为4 h时，Cd(II)离子去除率最高。此外，还确定了BLM的萃取过程更倾向于酸性条件(pH为1)。通过使用无因次还原浓度R f，系统从进料相中提取Cd(II)离子的能力已知，在上述条件下，Cd(II)离子的最大去除率为0.0193。研究了反应动力学，确定了萃取反应(k1)和溶出反应(k2)的反应速率常数。k1和k2值分别为0.94 h -1和2.45 h -1。

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来源期刊

Journal of Physical Science Physics and Astronomy-Physics and Astronomy (all)

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to disseminate latest scientific ideas and findings in the field of physical sciences among scientists in Malaysia and international regions. This journal is devoted to the publication of articles dealing with research works in Chemistry, Physics and Engineering. Review articles will also be considered. Manuscripts must be of scientific value and will be submitted to independent referees for review. Contributions must be written in English and must not have been published elsewhere.