Nermen N. Maximous and  George F. Nakhla and  W. K. Wan,  Removal of Heavy Metals from Wastewater by Adsorption and Membrane Processes: a Comparative Study.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2010, vol. 40(4). 125 - 130
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