Removal of Chromium with the Complexing Agents from Electroplating Industrial Effluents

Abstract

The presence of chromium in industrial effluents has become a huge problem worldwide as hexavalent chromium is highly toxic to animals due to its ability to generate reactive oxygen species in cells. The spectre of an overwhelming degradation of all aspects of the natural environment—physical, chemical, biological, and social—has been raised by human actions and the advances that have followed. One of the most important contributors to the breakdown of the components of the biosphere is environmental pollution, particularly pollution caused by chemicals. Among all chemical contaminants, heavy metals are believed to be of special ecological, biological and health significance. Unlike organic pollutants, the majority of which are susceptible to biological degradation, metal ions do not degrade into harmless end products.. To achieve the improved metal removal required by the discharge limitations, chemical precipitation is applied. It uses the fewest quantity of treatment chemicals and produces the least amount of sludge while removing the dissolved metal pollutants to the lowest levels feasible. The method is practical for removing complicated metals from wastewater.