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Membrane Water Treatment
  Volume 4, Number 2, April 2013 , pages 95-108

Treatment of ground waters in a hollow-fibre liquid membrane contactor for removal of ions
Md M Hossain

    Metal ions exist in seawater, groundwater and industrial wastewaters. These source waters can be recycled if their concentrations are reduced. A number of processes can be applied for this purpose. Liquid-liquid extraction is one of the promising methods. In this paper, experimental results are presented on the removal of Cr(VI) using Aliquat-336, a reactive carrier, in sunflower oil (a non-toxic solvent). The performance of this new system is compared with those of kerosene (a toxic solvent). The extent of removal of Cr(VI) from samples with high and low concentrations are presented. The process was upgraded to a bench-scale module that can selectively remove about 50-90% Cr(VI) from samples of groundwater. Thus this process can produce water within the acceptable range for recycling and for use in secondary purposes such as irrigation.
Key Words
    ground waters; liquid membrane contactor; removal; chromium; sunflower oil; solvent
Md M Hossain: Department of Chemical & Petroleum Engineering, United Arab Emirates University, P.O. Box 17555, Al Ain, UAE

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