Jock, Alexander Asanja, Anietie Ndarake Okon, Uchechukwu Herbert Offor, Festus Thomas, and Edmond Okwudilichukwu Agbanaje. 2020. “Adsorption of Nickel Ions from Petroleum Wastewater onto Calcined Kaolin Clay: Isotherm, Kinetic and Thermodynamic Studies”. Hungarian Journal of Industry and Chemistry 48 (2):45-49. https://doi.org/10.33927/hjic-2020-26.