GRM 2010 GRM 2011

Abstract Details

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Supported Liquid Membrane Technique for the Removal of Toxic Chemical Species from Wastewaters before using it for Irrigation
Paper Proposal Text :
Water is precious commodity in Gulf States and all GCC countries are currently at various levels of water stresses. In order to increase local production of food and reduce import dependency it is desirable to recycle industrial effluents/wastewater and use it for irrigation purposes. Now a day, the worldwide production and use of chemical compounds have increased tremendously which find their way into the water streams and many of these compounds are biologically non-degradable. Wastewater contains many toxic substances, both inorganic and organic, that must be removed before water could be used for irrigation purposes. Most of these chemical species are resistant to biodegradation and are readily absorbed by plants. In order to selectively remove chemical species from wastewater low-cost and economically feasible technologies need to be developed. Supported Liquid Membrane (SLM) technology is a novel technique of separation with very low capital cost as compared to conventional separation techniques. SLM separations, combining the process of extraction, diffusion and stripping in a single step, has aroused much interest in recent years since it constitutes one of the cheapest separation technique because of its relatively smaller inventory and low running cost. This is a promising technology for the separation of toxic metals from various aqueous media which can be extended to removal of organics as well. In the Eastern Province of Saudi Arabia, major source of potable water is desalination, which is very costly. The only way is to recycle wastewater and make it suitable for irrigation. In the present paper, SLM separation method for toxic metals like lead, cadmium, chromium, nickel, copper, etc. and organics like phenols and dyes are discussed. Up gradation from laboratory to pilot plant scale along with cost estimates is also presented.