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文章以宝钢钢渣和首钢钢渣为吸附剂,通过吸附实验考察了溶液中腐殖酸的存在对钢渣吸附重金属离子Cu2+、Cd2+、Pb2+的影响。研究结果表明钢渣可以同时吸附去除溶液中的腐植酸和重金属离子。腐殖酸的存在可以明显的促进钢渣对重金属离子的吸附。腐殖酸浓度为30 mg/L时,可使宝钢钢渣对Cu2+、Pb2+和Cd2+的理论吸附量分别增大61%、58%和33%;使首钢钢渣对Cu2+和Pb2+的理论吸附量分别增大40%、48%和11%。而重金属离子的存在会抑制腐殖酸在钢渣上的吸附。腐植酸通过在钢渣表面形成“吸附位点—腐植酸—重金属”的结构,来促进钢渣对重金属的吸附。
In this paper, Baosteel steel slag and Shougang steel slag were used as adsorbents to study the influence of humic acid on the adsorption of heavy metal ions Cu2 +, Cd2 + and Pb2 + by steel slag by adsorption experiments. The results show that the slag can be simultaneously adsorbed to remove humic acid and heavy metal ions in solution. The presence of humic acid can significantly promote the slag adsorption of heavy metal ions. When the concentration of humic acid was 30 mg / L, the theoretical adsorption capacity of Baosteel steel slag to Cu2 +, Pb2 + and Cd2 + increased by 61%, 58% and 33% respectively; the theoretical adsorption capacity of Baosteel slag to Cu2 + and Pb2 + Big 40%, 48% and 11%. The presence of heavy metal ions will inhibit the adsorption of humic acid on the steel slag. Humic acid promotes the adsorption of heavy metals by steel slag through the formation of “adsorption site - humic acid - heavy metal” structure on the surface of steel slag.