钢铁、钛和铝工业废渣在去除水中重金属和酸性中的作用

选取钢铁工业废渣中的钒钛磁铁矿选铁尾矿渣、钒钛磁铁矿含钛高炉渣、普通高炉渣、钢渣,钛工业废渣中的钒钛磁铁矿选钛尾矿渣和铝工业废渣中的赤泥作为研究对象,通过圆柱试验以检验其对水中重金属Cd2＋、Co2＋、Cu2＋、Mn2＋、Ni2＋、Zn2＋和酸性的去除能力。这6种工业废渣对水中的Cd2＋的吸附容量为278~6 811 mg/kg,对Co2＋的吸附容量为127~6 052 mg/kg,对Cu2＋的吸附容量为442~53 566 mg/kg,对Mn2＋的吸附容量为95~5 594 mg/kg,对Ni2＋的吸附容量为158~6 213 mg/kg,对Zn2＋的吸附容量为151~6 710 mg/kg,对酸的中和容量为4.5~8.9 mol H＋/kg。工业废渣尤其是钢渣和赤泥在改善地下水酸性和去除矿业或工业废水中的重金属离子和酸性方面具有很好的应用前景,可以达到以废治废的目的。

Application of Fe,Ti and Al Industrial By-Products in Heavy Metal Attenuation and Acid Neutralization of Wastewater

A series of detailed column sorption experiments have been conducted to investigate metal attenuation（Cd2＋,Co2＋,Cu2＋,Mn2＋,Ni2＋,Zn2＋） and acid neutralization in a synthetic wastewater by Fe-,Ti-and Al-containing industrial by-products.The industrial by-products comprised magnetite ore processing residue,titanium-containing blast furnace slag,blast furnace slag,steel slag,magnetite-containing titanium dioxide processing residue and red mud.The estimated range of metal sorption capacities for the six industrial by-products was： Cd2＋： 278~6 811 mg/kg,Co2＋：127~6 052 mg/kg,Cu2＋： 442~5 3566 mg/kg,Mn2＋： 95~5 594 mg/kg,Ni2＋： 158~6 213 mg/kg,and Zn2＋： 151~6 710 mg/kg.The acid neutralization capacity varied from 4.5~8.9 mol H＋/kg for the six industrial by-products.Industrial by-products,particularly steel slag and red mud,are potentially useful for the amelioration of acid drainage,or the attenuation of heavy metals and acidity in mining or industrial wastewaters.