1. a Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor D. E., Malaysia
2. b Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor D. E., Malaysia
3. c Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor D. E., Malaysia
4. d Malaysian Institute for Nuclear Technology Research (MINT), Bangi 43000, Kajang, Malaysia
5. e Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor D. E., Malaysia