“Photocatalytic Reduction of Chromium (VI) in a Typical Hides and Skin Industrial Wastewatwer using Zno/γ-Al2o3 Photocatalyst under Visible LIGHT” (2018) International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695/IJERAT, 4(9), pp. 75–86. doi:10.31695/IJERAT.2018.3329.