Adsorption of Lead (II) from aqueous solutions onto activated carbon prepared from Algerian dates stones of Phoenix dactylifera.L (Ghars variety) by H3PO4 activationNoura Chaouch، M.R. Ouahrani، Salah Eddine LaouiniOriental Journal Of Chemistryالمجلّد 30، (3)، الصفحات 1317-13222014مقال وصول مفتوح 26