Separation of Cd(ii) and Ni(ii) in a binary mixture through competitive adsorption and acid leaching. Issue 113 (29th October 2015)

• Record Type: Journal Article
• Authors: Guo, Hong; Zhang, Shufen; Kou, Zinong; Zhai, Shangru; Ma, Wei; Yang, Yi; Huang, Yin
• Is Part Of: RSC advances. Volume 5:Issue 113(2015)
• Page Start: 92885
• Page End: 92892
• Publication Date: 2015-10-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra13789f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Different heavy metals present simultaneously in aqueous solutions should be separated to promote environmental protection. Abstract : Different heavy metals present simultaneously in aqueous solutions should be separated to promote environmental protection. In this study, the biosorbent, succinylated maize straw, was used to separate and recover Cd(ii ) and Ni(ii ) ions from a binary mixture. The effects of various factors, such as contact time, pH, multi-metal isotherms, and adsorbent dose on the simultaneous removal of the two metal ions were investigated; a separation factor was introduced to evaluate this separation behavior. A separation process was proposed on the basis of the competitive adsorption results to separate metal ions from the binary system. This technique was then successfully employed to separate Cd(ii ) and Ni(ii ) ions from the simulated leach liquor of spent Ni–Cd batteries. Approximately 90% of the adsorbed Cd(ii ) ions were recovered, and the resulting solution contained <0.7 wt% of Cd(ii ) and >99 wt% of Ni(ii ).