title: Heavy metal adsorption changes of EAF steel slag after phosphorus adsorption.
abstract: A kind of electric arc furnace (EAF) steel slag was phosphated, and its isothermal and dynamic adsorptions of copper, cadmium, and lead ions were measured to determine if heavy metal adsorption changes after phosphorus adsorption. The surface area increased greatly after the slag was phosphated. Isothermal adsorption experiments showed that the theoretical Q(max) of the EAF steel slag on Cu(2+), Cd(2+), and Pb(2+) improved 59, 50, and 89% respectively after it was phosphated. Dynamic adsorption results showed that the greatest adsorption capacities of unit volume of Cu(2+), Cd(2+), and Pb(2+) were 2.2, 1.8, and 1.8 times that of the column packed with original EAF steel slag when the column was packed with phosphate EAF steel slag at the same heavy metal ion concentration. The breakthrough time, the exhaustion time and elution efficiency of the column also increased when the column was packed with phosphated EAF steel slag compared with that packed with original EAF steel slag. Phosphorus adsorption could further improve the heavy metal ion adsorption of the EAF steel slag.
authors.affiliation: Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing 100012, China.
authors.forename: Guanling
authors.initials: G
authors.lastname: Song
authors.forename: Lijing
authors.initials: L
authors.lastname: Cao
authors.forename: Xiao
authors.initials: X
authors.lastname: Chen
authors.forename: Wenhua
authors.initials: W
authors.lastname: Hou
authors.forename: Qunhui
authors.initials: Q
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D007220:Industrial Waste / Q000032:analysis*; D008669:Metallurgy; D019216:Metals, Heavy / Q000737:chemistry*; D008962:Models, Theoretical; D010758:Phosphorus / Q000737:chemistry*; D013232:Steel; D018508:Water Purification
chemical_list: D007220:Industrial Waste; D019216:Metals, Heavy; D013232:Steel; D010758:Phosphorus