1. Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Malaysia
2. Department of Chemical and Petroleum Engineering, College of Engineering, Afe Babalola University Ado-Ekiti (ABUAD), PMB 5454, Ekiti State, Nigeria
3. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia (UPM), Serdang 43400, Malaysia