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- W2413804334 abstract "Polymer-enhanced ultrafiltration was investigated to separate selectively Hg(superscript 2+) and Cd(superscript 2+) from aqueous solutions by using poly (acrylic acid) sodium salt as a complexing agent. Effects of pH, loading ratio (LR) and the added salt on separation coefficient (S) were investigated. When pH increased from 5 to 7.5, S decreased gradually. Controlling pH=5 was helpful to achieve the selective separation. At LR between 0.01 and 2, S increased with LR, reached a maximum value, and then decreased rapidly. It was preferable for the selective separation to control LR=1.5. S changed in the present of sodium sulfate. A concentration experiment was carried out at pH=5 and LR=1.5. When volume concentration factor (VCF) reached 15,mercury concentration in the retentate (C(subscript r, Hg)) increased linearly from 30 mg/L to 444.9 mg/L, whereas cadmium concentration in the retentate (C(subscript r, Cd)) changed only from 30 mg/L to 35.4 mg/L. S was about 227. Then, the final concentrated solution was used to study the process of washing. With increasing the washing water volume, C(subscript r, Hg) did not change, but C(subscript r, Cd) decreased rapidly to 5.24 mg/L. Further, another concentration experiment was performed at pH=6 and LR=0.033 by using all permeate solutions. At VCF=13, C(subscript r, Cd) increased from 27.37 mg/L to 354.7 mg/L." @default.
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- W2413804334 date "2010-06-10" @default.
- W2413804334 modified "2023-09-23" @default.
- W2413804334 title "聚合物强化超滤技术分离Hg(上标 2+)和Cd(上标 2+)的研究" @default.
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