大学化学 >> 2024, Vol. 39 >> Issue (6): 287-294.doi: 10.3866/PKU.DXHX202310073

化学实验 上一篇    下一篇

聚乙二醇-硫酸铵-亚硝基R盐体系用于钴(II)的分离

颜鑫灏2, 胡国梁2, 陈睿希2, 刘红瑜1,2, 姚奇志1,2, 李娇1,2, 李玲玲1,2   

  1. 1 化学国家级实验教学示范中心(中国科学技术大学), 合肥 230026;
    2 中国科学技术大学化学与材料科学学院, 合肥 230026
  • 收稿日期:2023-10-19 修回日期:2024-01-26 发布日期:2024-06-07
  • 通讯作者: 刘红瑜 E-mail:liuhyhx@ustc.edu.cn
  • 基金资助:
    2021年安徽省课程思政建设示范中心(2021kcszsfzx028)；中国科学技术大学2021年校级课程思政研究项目(2021xkcszxm02)； 2023年中国科学技术大学校级教研项目(2023xjyxm068）

Polyethylene Glycol-Ammonium Sulfate-Nitroso R Salt System for the Separation of Cobalt (II)

Xinhao Yan2, Guoliang Hu2, Ruixi Chen2, Hongyu Liu1,2, Qizhi Yao1,2, Jiao Li1,2, Lingling Li1,2   

  1. 1 National Demonstration Center for Experimental Chemistry Education(University of Science and Technology of China), Hefei 230026, China;
    2 School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2023-10-19 Revised:2024-01-26 Published:2024-06-07
  • Contact: Hongyu Liu E-mail:liuhyhx@ustc.edu.cn

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摘要： 在pH = 5缓冲溶液条件下，对仅有Co2+、仅有Ni2+、Co2+与Ni2+混合三种情况下Co2+的萃取率进行了探究。结果显示单独萃取Co2+时萃取率高达75.47%；然而对于混合溶液，萃取率较单独萃取Co2+明显下降。通过系列对比实验发现Ni2+的存在对Co2+的分光光度测量造成了干扰。因此，在综合性实验中我们利用分光光度法针对Co2+的萃取率进行分析，以及对可能影响萃取率的因素——pH、萃取时间、萃取次数进行了探究，寻找最佳实验条件，提高萃取率。

关键词: 聚乙二醇, 分光光度法, 萃取率, pH, 萃取次数

Abstract: The extraction efficiency of Co2+ was systematically evaluated under the condition of a pH 5 buffer solution. Three scenarios were examined: the extraction of Co2+ in Co2+ alone, Ni2+ alone and a mixed Co2+ and Ni2+ solution. Results indicated that the extraction efficiency reached 75.47% when Co2+ was extracted independently. However, this efficiency was markedly reduced in the mixed solution signifying a significant interference from Ni2+ in the spectrophotometric measurement of Co2+ through a series of comparative experiments. Subsequently, a comprehensive set of experiments employed spectrophotometry to assess the extraction efficiency of Co2+, scrutinizing variables such as pH, extraction duration and extraction frequency, to identify optimal experimental conditions and improve the extraction efficiency.

Key words: Polyethylene glycol, Spectrophotometric, Extraction rate, pH, Extraction frequency