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Separation of Ni2+ from ammonia solution through a supported liquid membrane impregnated with Acorga M5640

Hengpan Duan, Xiaohong Yuan, Qin Zhang, Ziyue Wang, Zhangjie Huang, Hong Guo, and Xiangjun Yang

School of Chemical Science and Technology, Yunnan University, Kunming, China

 

E-mail: yxjun@ynu.edu.cn

Abstract: Separation of Ni2+ from ammonia/ammonium chloride solution using a flat-sheet supported liquid membrane (SLM) impregnated with Acorga M5640 in kerosene was investigated. The fundamental experimental variables influencing Ni2+ transport, such as ammonia concentration, carrier concentration, H2SO4 concentration in the stripping solution, stirring speed, and initial Ni2+ concentration were studied. Almost all of Ni2+ was transported from the feed to the stripping phase after 18 h of operation with a permeability coefficient of 9.28 × 10−6 m s−1 under optimum conditions: stirring speed of 1000 rpm in both phases, 20 vol.% Acorga M5640 as the carrier, 1.70 mmol L−1 Ni2+ in the feed phase and 0.10 mol L−1 H2SO4 in the stripping phase. The flux value of Ni2+ was 15.82 × 10−6 mol m−2 s−1. Additionally, the influences of temperature and ultrasound on flux were examined, and results indicated that higher temperature and ultrasonic assistance improved transport of Ni2+ through the SLM. Selective separation of nickel from cobalt in an ammonia/ammonium chloride solution was also achieved through SLM. The stability of the SLM was examined on a continuous run mode and satisfactory stability of the nickel permeation was observed for 84 h (7 runs).

Keywords: Supported liquid membrane; Ni2+; Ammonia solution; Acorga M5640

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-016-0041-3

 

Chemical Papers 71 (3) 597–606 (2017)

Wednesday, December 11, 2019

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