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Biosorption technologies and membranes in the removal of heavy metals

Abstract:

In this paper a comparison between biosorption membrane technology and the elimination of Pb +2 and Cd +2 wastewater from the mining industry is performed. SEPA cell membranes CF II laboratory scale operations that allows cross-flow filtration with reverse ósmosis membranes (SE, GE Osmonics) and nanofiltration (DK, GE Osmonics), yielding a ratio of ósmosis rejection of 98,77 for Pb +2 is used and 98.30 for Cd + 2 and nanofiltration 98,67 for Pb + 2 and 98.05 for Cd +2 . Powered by biosorption using sugar cane bagasse removal percentages for 97.76 and 81.35 Pb +2 for Cd +2 are obtained. From the environmental point of view the two technologies are compatible with the environment and from the economic point of view, the membranes have a higher initial cost than biosorption process but life is about 10 years, Biosorption you can take advantage of agricultural waste with low acquisition cost.