Removal of disperse dye from aqueous solution in fixed-bed column by water treatment residuals

摘要

The present study assessed the potential of aluminium-based water treatment residuals (WTR) for removal of disperse dye, Disperse Navy Blue 3G from aqueous solution. Continuous flow column tests were performed by varying bed depth and flow rate using an influent dye concentration of 100 mg/L. The breakthrough curves were analysed and modelled using Thomas model and bed depth service time (BDST) model and produced good agreement with experimental results. The results showed that both flow rate and bed depth had significant influence on the sorption capacity and breakthrough time, and a maximum uptake capacity of 2.90 mg/g was observed. The study showed that though complete removal of dye cannot be achieved with WTR, it can be used as a primary treatment which would reduce further treatment costs.