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Adsorption equilibrium of malachite green dye onto rubber seed coat based activated carbon

In the present study, rubber seed coat based activ ated carbon (RSCAC) was used as adsorbent for malachite green (MG) dye removal from aqueous solution. The effects of dye initial concentration, contact time, solution tempe rature and pH on MG adsorption onto RSCAC were investigated. Results showed that the adsorption of MG was favourable at pH 6 whereas the adsorption uptake was found to increase with increase in initial concentration, contact time and solution temperature. Experimental data were analyzed by model equations such as Langmuir, Freundlich and Temkin isotherms and it was found Langmuir isotherm model best fitted well the adsorption data.