Removal of Chromium from Tannery Effluent Using Flyash

Chromium is highly toxic metal ions and considered as a priority pollutant released from various chemical industries like electroplating mixing activities, smelting, battery manufacture and tanneries etc. Effluents have been excessively released in to the environment due to rapid industrialization and have created a global concern. Unlike organic wastes, chromium (VI) effluents are non biodegradable and they can be accumulated in living tissue, causing various diseases and disorder. Therefore it must be removed before discharge. In the present study, experiment results carried out in batch adsorption process by using fly ash for removal of chromium (VI) were studied. The various parameters such as solution pH, initial chromium, and adsorbent dosage on the adsorption chromium concentration were studied and presented. The maximum removal of chromium (VI) at 92% was observed at pH of 8.0, adsorbent dosage of 10g/25ml and contact time of 48 hours in tannery effluents.