Exploitation of Low Cost Coal Fly Ash Adsorbent with Coagulants for the Treatment of Industrial Complex Nature Dyes Wastewater

Abstract

Dyes manufacturing industries are disposing of 100 tons of toxic dyes into water per annum which generates highly toxic wastewater, which harm the marine and aquatic life. Present research study was conducted to optimize the pollutant reduction rate of dyes wastewater using hybrid process of chemical coagulation and adsorption. Low cost and prepared an adsorbent which was more effective from coal of Lakhra Power Plant Jamshoro’s waste through physical and chemical treatment and was utilized in conjunction with commercial coagulants such as Ferric Chloride (FeCl3), Ferrous Sulfate (FeSO4) and Alum. Treatment efficiency of individual and combined process was analyzed for the reduction of turbidity, Chemical Oxygen Demand (COD), Color and total suspended solids (TSS) from dyes wastewater. Overall treatment efficiency of FeCl3, FeSO4, Alum and Ash adsorbent was determined by 57%, 20%, 63 % and 58 % respectively. Hybrid process of FeCl3-CFA, FeSO4-CFA and Alum-CFA have reduced the concentration of pollutants by approximately 73%, 60 % and 68 % respectively. The adsorptive capacity and adsorption percent of Ash adsorbent was determined. The adsorptive capacity of adsorbent declined on the ever-increasing adsorbent quantity. The adsorption behavior of Ash adsorbent in dyes wastewater pollutants removal was measured using Langmuir and Freundlich isotherm models. Freundlich model with isotherms found appropriate for the effluent pollutants adsorption.