1. 1Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan
2. 2Civil and Environmental Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 31750 Tronoh, Perak, Malaysia
3. 3Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad, Pakistan
4. 4Department of Chemical Engineering, COMSATS Institute of Information Technology, Lahore, Pakistan