Tie, Jingxi, Dong Chen, Yunjie Wan, Cheng Yan, and Xiwang Zhang. 2013. “Adsorption Removal of Phosphorus from Aqueous Solution by Heat-Activated Alum Sludge”. Asian Journal of Chemistry 25 (16):9129-34. https://doi.org/10.14233/ajchem.2013.15040.