November 2015

Health risk assessment of heavy metals in water, air, soil and fish

The study and application of health risk assessment techniques are crucial in order to understand the risk of exposure to heavy metals and other harmful pollutants. It entails evaluating the risks of exposure at various concentrations and with reference to certain standard values approved by World Health Organization (WHO) and United States Environmental Protection Agency (USEPA). Investigation of water contamination...

Author(s): Isa Baba Koki, Amina Salihi Bayero, Aminu Umar and Sabo Yusuf

November 2015

Synthesis, characterization and photocatalytic activity of MnO2/Al2O3/Fe2O3 nanocomposite for degradation of malachite green

New nanocomposite MnO2/Al2O3/Fe2O3 photocatalyst was successfully synthesized by sol-gel method using metal salts as precursors in the presence of acid catalyst. The as-synthesized samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), atomic absorption spectroscopy (AAS) and UV-Vis diffuse reflectance spectroscopy. Elemental analyses of the as-synthesized samples were similar to those...

Author(s): Haile Hasana Logita, Abi Tadesse and Tesfahun Kebede