Effect of Mnso4 on the Chromium Removal from the Leather Industry Wastewater

Chromium (VI) is one of the heavy metals in water and wastewater that has the most toxic characteristic. Consequently, it is dangerous for human and environmental health. Various methods are used for removal of the chromium from wastewater, and new methods have been developed in recent years. Recent studies and investigations on the removal of environmental pollution selected methods that were economical, of optimum efficiently and could be carried out easily. In this study, the removal of Cr6+ in the leather industry wastewater is investigated using MnSO4 that was used easily and economically. Experimental studies are performed in two phases. In the first phase, the optimum MnSO4 dose for removal of Cr6+ was determined. In the second phase, the optimum pH was studied. About 96% removal of chromium was launched with 530 mg l−1 MnSO4 dose at pH value 9 in the wastewater sample.

[1]  D. Stearns.  Is chromium a trace essential metal? , 2000, BioFactors.

[2]  D. Orhon,et al.  Characterization of tannery wastewaters for pretreatment - selected case studies , 1997 .

[3]  J. Murillo,et al.  Accumulation of heavy metals in sunflower and sorghum plants affected by the Guadiamar spill. , 1999, The Science of the total environment.

[4]  K. Pagilla,et al.  Laboratory Studies on Remediation of Chromium-Contaminated Soils , 1999 .

[5]  G. Tiravanti,et al.  A bench study on chromium recovery from tannery sludge , 1991 .

[6]  C. Polprasert,et al.  Chromium removal by a bipolar electro-chemical precipitation process , 1996 .

[7]  M. Rodrigues,et al.  Transport of trivalent and hexavalent chromium through different ion-selective membranes in acidic aqueous media , 1998 .

[8]  M. de la Guardia,et al.  Removal of hexavalent chromium from wastewaters by bone charcoal , 1999 .

[9]  G. Tiravanti,et al.  Pretreatment of tannery wastewaters by an ion exchange process for Cr(III) removal and recovery , 1997 .

[10]  M. Khamis,et al.  Selective adsorption of chromium(VI) in industrial wastewater using low-cost abundantly available adsorbents , 2002 .

[11]  J. Roux,et al.  Mucor biosorbent for chromium removal from tanning effluent , 1998 .

[12]  A. Hafez,et al.  RO membrane removal of unreacted chromium from spent tanning effluent. A pilot-scale study, Part 2 , 2002 .

[13]  Z. Aksu,et al.  Investigation of Biosorption of Chromium(VI) on Cladophora Crispata in Two-Staged Batch Reactor , 1996 .