Batch and column removal of the dye blue 3R over pumice

Abstract

AbstractRemoval of blue 3R dye (B3R) from wastewaters over pumice has been carried out in batch and fixed-bed column modes. Pumice is a cheap and readily available construction material. In the batch mode of the present study, various essential factors, influencing the adsorption such as dye concentration, amount of adsorbent, pH of the solution and temperature, have been monitored. Attempts have also been made to verify Langmuir, Freundlich and Temkin isotherm models. Langmuir was found to be more favourable in the present study. Maximum adsorbate uptake capacity (qm) was found 97.58 mg/g for 1 g of pumice at the temperature of 40°C with a highest correlation coefficient of R2 (0.994). Batch mode kinetic study results showed that the pseudo-second-order kinetic model is dominant during the adsorption. In the continuous mode of the present study, various bed depths, flow rates and dye solution concentration were applied to the adsorption column. Thomas and Clark models have also been tested. Error analysi...