Bahari Alias, Azil, et al. “Hydrogen Sulfide (H2S) Removal by Commercialized Biochar Derived from Rice Husk: Effect of Flowrate, Temperature and Sorbent Weight”. International Journal of Engineering & Technology, vol. 7, no. 4.18, Nov. 2018, pp. 364-8, https://doi.org/10.14419/ijet.v7i4.18.21971.