Abd-Rahman, Rakmi, Hamirosima Hasani, Abdul Amir H. Kadhum, Bilal A. Wasmi, Ahmed A. Al-Amiery, and Abu Bakar Mohamad. 2013. “Heavy Metal Biosorption Efficiencies of Expanded Bed Biofilm Reactor and Sequencing Batch Biofilm Reactor”. Asian Journal of Chemistry 25 (13):7193-98. https://doi.org/10.14233/ajchem.2013.14502.