THE REDUCTION OF CHROMIUM AND CHEMICAL OXYGEN DEMAND OF BATIK EFFLUENT BY UNCALCINED AND CALCINED Mg/Al HYDROTALCITE ON VARIOUS pH TREATMENTS

Abstract

The increasing Batik industry in Indonesia has an impact on wastewater production. The chemical compound in Batik wastewater such as dyes will contaminate the environment when it does not correctly treat, especially for a small-scale industry that usually does not have proper treatment before discharge to the environment. Adsorption is a simple and efficient method of reducing dyes. Hydrotalcite is an adsorbent material with rehydration properties. Hydrotalcite has been synthesized by the co-precipitation method. Rehydration properties improve Batik wastewater quality through Cr reduction and Chemical Oxygen Demand (COD) degradation with pH three as the optimum condition for adsorption. Ability to improve adsorption capacity after rehydration makes hydrotalcite possible as reusable material.