Ahmed Hassan และ Lupong Kaewsichan. (2016) Removal of Pb(II) from Aqueous Solutions Using Mixtures of Bamboo Biochar and Calcium Sulphate, and Hydroxyapatite and Calcium Sulphate. <i>EnvironmentAsia</i>, <i>9</i>(1), p37-44.Ahmed Hassan และ Lupong Kaewsichan. "Removal of Pb(II) from Aqueous Solutions Using Mixtures of Bamboo Biochar and Calcium Sulphate, and Hydroxyapatite and Calcium Sulphate". EnvironmentAsia 9 (2016):p37-44.Ahmed Hassan และ Lupong Kaewsichan. Removal of Pb(II) from Aqueous Solutions Using Mixtures of Bamboo Biochar and Calcium Sulphate, and Hydroxyapatite and Calcium Sulphate. Thai Society of Higher Education Institutes on Environment:ม.ป.ท. 2016.