University Chemistry ›› 2024, Vol. 39 ›› Issue (6): 287-294.doi: 10.3866/PKU.DXHX202310073

• Chemistry Laboratory • Previous Articles     Next Articles

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

PDF

314

Like

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