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Extraction study on recovery of nickel (II) from concentrated chloride medium with N,N′-bis(salicylaldeyde)ethylenediimine in the presence of CTAB and Brij® 35 surfactants
Journal of Dispersion Science and Technology ( IF 1.9 ) Pub Date : 2020-07-25 , DOI: 10.1080/01932691.2020.1791171
Zeyneb Benfettouma 1 , Mohammed Hadj Youcef 1 , Tayeb Benabdallah 1 , Hasnia Reffas 1
Affiliation  

Abstract

New extraction systems have been developed for recovery of nickel(II) from concentrated saline chloride medium (1 M) via the use of the chelating extractant, N,N′ Bis(salicylaldeyde) ethylenediimine (H2SALEN), and different surfactants namely, cetyltrimethyl, ammonium, bromide (CTAB) and polyoxyethylene (23), dodecyl either (Brij® 35).The effects of the main experimental parameters such as extraction time, pH, extractant concentration and surfactant concentration on the extraction process of nickel(II) with H2SALEN alone and H2SALEN-surfactant mixture at 30 °C were studied and compared. The findings of the examination revealed a good recovery (E = 70–80%) of nickel with H2SALEN alone in various solvents (chloroform, toluene and methylisobutylketone) in the acidic pH range (4–5). The addition of both CTAB and Brij® 35 to the aqueous phase resulted in a remarkable increase in the rate of nickel extraction by reducing the extraction time from 4 hours to 20–30 minutes. The stoichiometries of the extracted species and extraction constants were ascertained by slope analysis method. The surfactant-based extraction systems have shown high extractability and a fast separation of Ni (II) into chloroform than with the reported ones. The extraction mechanisms of nickel have been suggested.



中文翻译:

在 CTAB 和 Brij® 35 表面活性剂存在下,用 N,N'-双(水杨醛)乙二亚胺从浓氯化物介质中回收镍 (II) 的萃取研究

摘要

通过使用螯合萃取剂 N,N' 双(水杨醛)乙二亚胺(H 2 SALEN) 和不同的表面活性剂,开发了新的萃取系统,用于从浓氯化盐水介质 (1 M) 中回收镍 (II),即:十六烷基三甲基、铵、溴化物(CTAB)和聚氧乙烯(23)、十二烷基(Brij ® 35)。 提取时间、pH、提取剂浓度和表面活性剂浓度等主要实验参数对镍(II)提取过程的影响研究和比较了单独的H 2 SALEN 和 H 2 SALEN-表面活性剂混合物在 30 °C 下的情况。检查结果表明,镍与 H 2 的回收率良好 (E = 70–80%)在酸性 pH 值范围 (4-5) 中,单独使用 SALEN 溶解在各种溶剂(氯仿、甲苯和甲基异丁基酮)中。将 CTAB 和 Brij ® 35 添加到水相中,将提取时间从 4 小时缩短到 20-30 分钟,从而显着提高了镍提取率。提取物的化学计量和提取常数通过斜率分析法确定。与报道的相比,基于表面活性剂的萃取系统显示出较高的可萃取性和将 Ni (II) 快速分离成氯仿的速度。已经提出了镍的提取机制。

更新日期:2020-07-25
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