REMOVAL OF REACTIVE BLACK 5 DYE FROM WATER BY ADSORPTION ONTO CARBON ADSORBENT PREPARED FROM A NATURAL BIO WASTE BAUHINIA RACEMOSA FRUIT PODSS. UMA DEVI AND P. PRABHAKARAbstract The adsorption of Remazol Black 5 (RB 5) dye onto chemically activated carbon adsorbent prepared from fruit pods of Bauhinia Racemosa was carried out by adsorption technique. Batch adsorption experiments were performed to find out the effect of adsorbent dose, pH and temperature on the removal of RB 5 dye from aqueous solution. The results revealed that percentage removal of the dye was 60 -70 % at pH 6.8 with contact time of 120 minutes. The optimum dosage amount of adsorbent was 0.05g / 100 mL. Acidic pH was suitable for the adsorption of RB 5 dye. The equilibrium adsorption behavior was measured by applying Langmuir and Freunlich adsorption isotherm models. The FE-SEM images of the adsorbent clearly indicate the existence of large number of pores on the external surface of the adsorbent provide binding sites for the adsorption of dye molecules. |