Le, T. and Tran, B. 2014. Removal of non-biodegredable organics from landfill leachate using paper mill sludge as a low cost adsorpbent. Science and Technology Development Journal. 17, 2 (Jun. 2014), 5-12. DOI:https://doi.org/https://doi.org/10.32508/stdj.v17i2.1297.