Adsorption of Maiachite Green Using a Low-Cost Activated Carbon Prepared From Cassia Fstuaf
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Date
2011
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Abstract
in the present study the efficiency of the carbon adsorbent prepared from the Cassia fistula
seeds was tested for the removal of malachite green dye from aqueous solution. The
parameters, such as pH, adsorbent dosage and initial dye concentration were systematically
evaluated. It is an N- methylated diaminotriphenyl methane dye widely used for colouring
purpose and highly cytotoxic to mammalian cells. The percentage removal of malachite
green increased with concentration of the dye solution. Nearly 40% adsorption was noted
at pH 10 in 180 min of contact time at initial concentration of 4 0 0 mg/L with 3 0 0 mg of the
low-cost adsorbent. Removal of malachite green increased from 2 4 .0 5 to 2 8 .2 3% with
increasing adsorbent dosage from 3 0 0 to 600 mg in 180 min of agitation time, using 100
mL of dye solution of initial concentration of 4 0 0 mg/L. Langmiur adsorption isotherm plots
and Freundlich adsorption isotherm plots were linear showing the applicability of the isotherms
for malachite green adsorption.