1. Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), University Tunku Abdul Rahman, Kampar, Perak 31900, Malaysia
2. Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Bandar Seri Iskandar, Darul Ridzuan, Perak, Malaysia
3. Environmental Engineering Technology, Malaysian Institute of Chemical & Bioengineering Technology, Universiti Kuala Lumpur, (UniKL, MICET), Melaka 78000, Malaysia