Chromium removal from the tannery wastewater using biosorbent

Disposal of wastewater from the tannery causes a serious environmental pollution. In tanning process, most of the tanneries use basic chromium sulphate as tanning agent where only 60% is taken up by the pickle pelt and the remaining 40% chromium reminded as the solid or liquid phases especially in spent chrome liquor. Discharging of chromium after chrome tanning operation is the most common pollutants in tannery. Removal or recovery of chromium from the tannery wastewater is an important issue. In this study, an investigation was made to remove the chromium from wastewater using the prepared low cost charcoal of plant bark on the removal of high concentrated chromium tanning wastewater. The effectiveness of chromium removal was examined by investigating different parameters e.g., charcoal dose, contact time.The chromium removal efficiency was obtained at optimized conditions 99.9%. This approach will enable a substantial reduction of environmental pollution. The use of low cost indigenous biosorbent could be better option for the removal of chromium from tanning wastewater.