C. I. Nwoye

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

I. E. Nwosu

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

N. I. Amalu

Project Development Institute Enugu, Nigeria

S. O. Nwakpa

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

M. A. Allen

Department of Mechanical Engineering, Micheal Okpara University, Umuahia, Abia State, Nigeria

W. C. Onyia

Department of Metallurgical and Materials Engineering, Enugu State University of Science &Technology, Enugu, Enugu State, Nigeria