Gunatilake, Sunethra Kanthi. “Removal of Cr (III) Ions from Wastewater Using Sawdust and Rice Husk Biochar Pyrolyzed at Low Temperature”. International Journal for Innovation Education and Research 4, no. 4 (April 1, 2016): 44–54. Accessed July 1, 2024. https://scholarsjournal.net/index.php/ijier/article/view/531.