Abstract:

Heavy metal pollution load reduction is achieved by using EDTA, metal oxide and activated charcoal individually in water and wastewater samples. In recent advanced treatment involved using the combination of two or more techniques for remediation. The study focuses on the performance evaluation of treatment by combining metal oxides, EDTA, and activated charcoal.
Ethylene diamine tetra acetic acid (EDTA) is an excellent chelating agent, as it contains two amino groups and four carboxyl groups used as the binding sites of metal ions (1). Activated charcoal possesses a high surface area for adsorption, which removes metal ions by adsorption phenomenon (2). Evaluation of efficiency for removal of heavy metal by varying the pH concentration, contact time, and temperature in water samples. Batch studies were carried out to assess the suitable conditions required for remediation. Effective Remediation of heavy metals in groundwater is achieved with a high concentration of activated charcoal, EDTA, metal oxides for Zn, B, Cu, Cr and decreasing order as Zn > B > Cu > Mn > Pb > Cr > As > Al. By reducing the concentration of activated charcoal, EDTA, and metal oxides for heavy metals in groundwater the effect of treatment is found more for Pb, As, Mn and the decreasing order of reduction follows as Mn > Zn > B > Cu > Pb > As > Al > Cr. Aluminum concentration is not affected by both high and low concentrations. The Reduction of metal concentration in wastewater is more with a high concentration of activated charcoal, EDTA, and metal oxides. all metals Zn, B, Mn, Cu, Pb, As, Al, except chromium, and order of remediation Zn > B > Mn > Cu > Pb > As > Al > Cr. When compared to a higher concentration of activated charcoal, EDTA, and metal oxides to lower in wastewater, all studied metals are reduced excellently at higher levels only. Reduction of heavy metal load in groundwater and wastewater, high and low concentrations of activated charcoal, EDTA, and metal oxides raised by increasing the contact time and temperature. Based on the present study, the remediation efficiency of heavy metals elevated more at 4 days of contact time, next at 40°C and the same day.