C. I. Nwoye

Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria

S. O. Nwakpa

Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria

I. E. Nwosu

Department of Environmental Technology, Federal University of Technology, Owerri, Nigeria

J. U Odo

Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria

E. C. Chinwuko

Department of Industrial and Production Engineering, Nnamdi Azikiwe University, Awka, Nigeria

N. E. Idenyi

Department of Industrial Physics Ebonyi State University, Abakiliki, Nigeria