2017. Removal of Methyl Red using Chemical Impregnated Activated Carbon Prepared from Parkia speciosa Pod (Petai) as a Potential Adsorbent. Journal of Tropical Resources and Sustainable Science (JTRSS) . 5, 2 (Dec. 2017), 62–65. DOI:https://doi.org/10.47253/jtrss.v5i2.600.