Selective separation of Hg(II) and Cd(II) from aqueous solutions by complexation–ultrafiltration process
作者： Jian Xian Zeng , Hong Qi Ye , Nian Dong Huang , Jun Feng Liu , Li Feng Zheng
DOI: 10.1016/J.CHEMOSPHERE.2009.05.019
关键词:
摘要: Abstract Complexation–ultrafiltration process was investigated to separate selectively Hg(II) and Cd(II) from binary metal solutions by using poly (acrylic acid) sodium salt as a complexing agent. Effects of operating parameters on selective separation factors (βCd/Hg) the both metals have been examined in detail. Results indicated that loading rate, pH, concentration added low-molecular competitive agent affect significantly βCd/Hg value. Further, experiment carried out according previous optimum parameters. Rejection coefficient mercury is close 1, while cadmium about 0.1. The characterized good effectiveness, enabled rapid linear increase very slow retentate. Then, diafiltration technique applied further metals. Cadmium retentate declines sharply with volume, whereas for it contrary.
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