Mathurasa, L. and Damrongsiri, S. 2017. Potential of Using Surfactants to Enhance Ammonium and Nitrate Adsorption on Rice Husk and Its Biochar. Applied Environmental Research. 39, 1 (Feb. 2017), 11–22. DOI:https://doi.org/10.35762/AER.2017.39.1.2.