CHARACTERIZATION AND COLUMN ADSORPTIVE TREATMENT FOR COD AND COLOR REMOVAL USING ACTIVATED NEEM LEAF POWDER FROM TEXTILE WASTEWATER

Abstract

The textile wastewater samples before treatment processes has been collected and characterized using standard methods, in which COD, color and other contaminations are high and prior to remove before discharge. Feasibility of column adsorption of components contributing COD and color onto activated Neem Leaf Powder using sulphuric acid (a-NLP) from textile wastewater has been studied in this investigation. The effect of process parameters like different flow rate, bed-height and pH for COD and color removal has been analyzed, in which adsorption reached saturation faster with increasing the flow rate and pH; while it was the advantage of column adsorption with the increase in the a-NLP bed. The data were applied to Thomas, Yoon-Nelson, Bed Depth Service Time (BDST) and Adams and Bohart Model to evaluation of efficacy of the column. The maximum adsorption capacity related to Adams and Bohart model was found to be 725.7 and 380.4 mg/g for COD and color respectively at flow rate of 5 ml/min and bed height of 15 cm when a-NLP was used.