Alginate coated loofa sponge discs for the removal of cadmium from aqueous solutions.
A biosorbent was prepared by coating the fibrous network of loofa sponge (Luffa cylindrica) with a thin film of calcium alginate. Alginate-coated loofa sponge removed Cd(II) rapidly, reaching equilibrium loading of 124 mg g(-1) in 30 min. Seventy % of equilibrium uptake was achieved in 10 min. In contrast, it took 240 min for alginate beads to reach a loading equilibrium of 88 mg g(-1) under identical conditions. The biosorption behaviour followed the Langmuir adsorption isotherm and the ACLS biosorbent was shown to be highly effective in removing Cd(II) from a 10 mg l(-1) solution in a continuous flow fixed-bed column bioreactor.
Biological and Environmental Systems Group, Department of Chemical and Process Engineering, University of Sheffield, Sheffield, S1 3JD, UK.
M
M
Iqbal
R G J
RG
Edyvean
D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D000818:Animals; D019149:Bioreactors; D002104:Cadmium / Q000302:isolation & purification* / Q000493:pharmacokinetics; D020723:Glucuronic Acid / Q000737:chemistry*; D006603:Hexuronic Acids / Q000737:chemistry*; D011161:Porifera; D014873:Water Pollutants / Q000302:isolation & purification* / Q000493:pharmacokinetics; D018508:Water Purification
D000464:Alginates; D006603:Hexuronic Acids; D014873:Water Pollutants; D002104:Cadmium; D020723:Glucuronic Acid