Liquid-liquid extraction of Co(II) from nitrate solution using TOA

被引：14

作者：

Mohanty, Archita ^{[1
]}

Devi, Niharbala ^{[1
,2
]}

Sukla, Lala Behari ^{[1
]}

Swain, Nandita ^{[3
]}

机构：

[1] Siksha O Anusandhan Deemed Be Univ, Biofuels & Bioproc Res Ctr, Inst Tech Educ & Res, Bhubaneswar 751030, India

[2] Siksha O Anusandhan Deemed Be Univ, Inst Tech Educ & Res, Dept Chem, Bhubaneswar, Odisha, India

[3] Odisha Univ Agr & Technol, Coll Basic Sci & Humanities, Dept Chem, Bhubaneswar, India

来源：

MATERIALS TODAY-PROCEEDINGS | 2020年 / 30卷

关键词：

Tri-n-octylamine (TOA); Liquid-liquid extraction; Cobalt(II); Potassium nitrate; Stripping; HYDROCHLORIC-ACID SOLUTIONS; SOLVENT-EXTRACTION; ION BATTERIES; SODIUM-SALTS; COBALT; SEPARATION; TRIOCTYLAMINE; NICKEL; RECOVERY; D2EHPA;

D O I：

10.1016/j.matpr.2020.01.381

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cobalt has widespread industrial applications but if present in excess amounts it may cause several noxious effects. Liquid-liquid extraction process can be useful in cleaning the environment from harmful chemical pollutants. Solvent extraction of cobalt using cobalt nitrate as the feed solution and trioctylamine (TOA) as the extractant in toluene was carried out where the effects of nitric acid concentration, equilibration time, concentration of the extractant and cobalt ions had been investigated. The percentage extraction of Co(II) decreased upon increasing the concentration of acid. A time of 15 min was needed to achieve the extraction equilibrium. Highest percentage extraction of cobalt was achieved using 0.1 M TOA which is 99%. Cobalt loading increased with increase in metal ion concentration. Presence of nitrate ions had almost no significance in the extraction process. The loaded organic phase was stripped using different stripping agents and 99.15% back extraction was achieved with 0.1 mol/L (NH4)(2)CO3. The extraction mechanism was proposed from the FTIR and slope measurement. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：262 / 266

页数：5

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