a
School of Engineering, Design and Technology, University of Bradford, Bradford BD7 1DP, UK
E-mail: elamyn01@yahoo.com
b
School of Archaeological, Geographical and Environmental Sciences, University of Bradford, Bradford BD7 1DP, UK
c
Centre for Water Advanced Technologies and Environmental Research, Multidisciplinary Nanotechnology Centre, College of Engineering, Swansea University, Swansea SA2 8PP, UK