Removal of endosulfan from water using palm shell activated carbon and rice husk ash
Lim, Y.N., Shaaban, M.G. and Yin, C-Y (2008) Removal of endosulfan from water using palm shell activated carbon and rice husk ash. Journal of Oil Palm Research, 20 . pp. 527-532.
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In this study, the adsorption of endosulfan, a type of pesticide, onto agricultural waste-based adsorbents, namely oil paint shell activated carbon (PSAC) and rice husk ash, (RHA), was investigated. The as-received adsorbents were used for batch α- and, β-endosulfan adsorption studies which included kinetics and equilibrium aspects at a constant solution pH of 5 and at a temperature of 25°C. It was found that removal of, β- endosulfan by both adsorbents was significantly more efficient than that of α-endosulfan indicating a high affinity of PSAC and RHA towards, β-endosulfan. Interestingly, kinetic equilibrium for β-endosulfan adsorption onto PSAC was achieved after 30 min of contact time with a very high capacity of 418 mg g-1. The adsorption kinetics data fitted the pseudo-second order model well, implying chemisorption was the rate-controlling step. Equilibrium adsorption data for PSAC fit the Freundlich isotherm better than the Langinuir isotherm, suggesting the existence of multi-layer adsorption of endosulfan on a relitively heterogeneous PSAC surface. It was found that PSAC was efficient in removing β-endosulfan from water while it was conversely true for RHA.
|Publisher:||Malaysian Palm Oil Board|
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