| Treatment of Zn-Containing Acidic Waste Water by Emulsion Liquid Membrane Process |
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| 作者姓名： | 王士柱 何培炯 郝东萍 朱永贝睿 |
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| 作者单位： | WANG Shizhu，HE Peijiong，HAO Dongping，ZHU Yongjun $$$$ Institute of Nuclear Energy Technology，Tsinghua University，Beijing 102201，China |
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| 摘 要： | IntroductionThe concept of emulsion liquid membrane ( ELM)was suggested by Li in1 9681] .In this technique,extraction and re- extraction are carried out in onesingle step with a large mass transferarea( 1 0 6m2 /m3 ) obtained within the emulsion drops.Theseadvantages attracted researchers with much ELMresearch carried out2 4] since then. Industrialprocesses for treating acidic Zn- containing wastewater by EML have not been reported.Based onour laboratory experiments,we began to build ap…
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Treatment of Zn-Containing Acidic Waste Water by Emulsion Liquid Membrane Process |
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| Abstract: | Zn-containing waste water from a viscose staple fiber plant has been treated using the emulsion liquid membrane (ELM) process since 1995. The flow sheet and operating parameters of the ELM process are introduced. After adjusting the membrane composition, changing the emulsion phase ratio, and adding a scrubbing step, the ELM process operated normally without trouble for emulsion splitting and mass transport throughput. The splitter voltage was decreased to 3.55 kV. The zinc concentration of treated waste water was lowered to less than 10 mgL-1. More than 95% of the zinc was recovered and reused. |
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| Keywords: | emulsion liquid membrane(ELM) zinc acidic waste water continuous operation pilot plant |
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