基于PEG-硫酸钠双水相体系萃取工业废水中的镍  

Nickel Extraction from Industrial Wastewater Based on PEG-Sodium Sulfate Aqueous Two-phase System

作　　者：韩明雪 张旭男 宗薇 HAN Ming-xue;ZHANG Xu-nan;ZONG Wei(College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China;Heilongjiang Industrial Hemp Processing Technology Innovation Center,Qiqihar University,Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006 [2]齐齐哈尔大学黑龙江省工业大麻加工技术创新中心,黑龙江齐齐哈尔161006

出　　处：《分析测试学报》2024年第9期1425-1432,共8页Journal of Instrumental Analysis

基　　金：黑龙江省省属高等学校基本科研业务费科研项目资助(145309611,145209118)。

摘　　要：该文采用聚乙二醇(PEG)和硫酸钠(Na2SO4)构建双水相体系(ATPS),对废水中的镍离子进行选择性提取和分离。通过对萃取剂种类及其质量浓度、盐溶液pH值、反应温度等条件进行优化,结果表明,在35℃,萃取剂海藻酸钠(SA)为0.1 g/L的条件下,超过80%的镍离子可以从pH 2.0的盐溶液中有效、准确地分离出来。同时多种共存离子不会对萃取产生干扰。该研究为废水中镍离子的处理及回收提供了理论指导,丰富了绿色生产技术中水凝胶配体-双水相萃取系统的研究内容。Nickel is a toxic metal element that causes sensitization and is classified as a human car⁃cinogen.Improper handling of nickel can make it a major source of water and soil pollution.The re⁃covery of nickel ions from wastewater containing nickel is considered to be one of the effective ways to reduce pollution and solve the shortage of nickel resources.However,the problem of efficient and se⁃lective separation of nickel from complex environments has not been fully solved.In this paper,poly⁃ethylene glycol(PEG)and sodium sulfate were used to construct a two-phase aqueous system(ATPS)to selectively extract and separate nickel from wastewater.The types and concentration of nickel ex⁃tractant,pH value of salt solution,temperature and co-existing metal ions were further optimized.The results showed that:At 35℃,the sodium alginate(SA)concentration is 0.1 g/L,more than 80%of nickel ions are efficiently and accurately separated from pH 2.0 salt solutions.The interfer⁃ence of multiple co-existing ions is avoided.Therefore,this work provides theoretical guidance for the treatment and reuse of nickel ions in wastewater,and the research content of hydrogel ligand-twophase aqueous extraction system in green production technology was enriched.

关 键 词：双水相 萃取 镍离子 电感耦合等离子体质谱 工业废水 

分 类 号：O657.63[理学—分析化学] O614.81[理学—化学]