1. Bioremediation Research Centre, Faculty of Civil Engineering, Universiti Teknologi MARA, Shah Alam, Selangor 40450, Malaysia.
2. Professor, INTEC Education College, Jalan Senangin Satu, 17/2A, Seksyen 17, Shah Alam, Selangor 40200, Malaysia.
3. Bioremediation Research Centre, Faculty of Civil Engineering, Universiti Teknologi MARA, Shah Alam, Selangor 40450, Malaysia (corresponding author).