Rhaman, M., Haque, M., Rouf, M., Siddique, M. and Islam, M. 2015. Preparation and characterization of activated carbon & amorphous silica from rice husk. Bangladesh Journal of Scientific and Industrial Research. 50, 4 (Dec. 2015), 263–270. DOI:https://doi.org/10.3329/bjsir.v50i4.25835.