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Sorption of As(V) using
different biomaterials
A number of locally available biomaterials like oyster shell, charcoal, saw
dust, coir, rice husk, rice straw, rice bran and mushroom waste were used to
sorb As(V) from the solution. The kinetics of biomaterials were fast and
within 2 hours equilibrium could be achieved. The As(V) sorption was
dependent on pH of the solution. Optimum pH for sorption process was
established for all the biomaterials. Among the sorbents tested oyster shell
was better biomaterial in terms of As(V) removal efficiency. At 4% pulp
density the oyster shell could remove about 80% As(V) from an initial
concentration of 10mg/l. The sorption percentage decreased with increase of
temperature. The effect of other sorption parameters, like concentration
variation of sorbent and sorbate were also studied. |
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