A review of bio-based activated carbon properties produced from different activating chemicals during chemicals activation process on biomass and its potential for Malaysia by Chew, Tung Woey, H’Ng, Paik San, Luqman Chuah Abdullah, Chuah Teong Guan, Chin, Kit Ling, Lee, Chuan Li, Mohd Nor Hafizuddin, Mohd Sahfani, TaungMai, Lulu