Osasona, I., O. Adebayo, A., Okoronkwo, A., Ajayi (Nigeria), O. (2015). 'Acid and Alkali Modified Cow Hoof Powder as Adsorbents for Chromium (VI) Removal from Aqueous phase (Research Note)', Iranian (Iranica) Journal of Energy & Environment, 6(4), pp. -.