工业废水中多金属离子的吸附净化

Adsorption and purification of multiple metal ions in industrial wastewater

以含有Si、Al、Ca、C元素的矿物材料作为基质,经特定条件处理后造粒成型加工成轻质多孔Si-Al-Ca-C结构的吸附材料。研究了该吸附材料对工业废水中多种金属离子的吸附性能,探讨了影响吸附性能的因素。研究结果表明,在一定条件下,Si-Al-Ca-C吸附材料对工业废水中Al3+、Ca2+、Mn2+、Cu2+、Fe3+、Mg2+、As3+和Zn2+的净化率分别高达99.34%、99.82%、98.26%、98.16%、97.76%、97.01%、100%和89.09%。金属离子残留浓度分别为0.152、0.07、0.012、0.02、0.119、0.311、0和0.259 mg/L,均低于国家污水综合排放标准(GB8978-1996)一级标准。

A lightweight porous material of Si-Al-Ca-C structure was made from several mineral materials containing element of Si, Al, Ca, C. The adsorption capacity of the matrix material to the metals in industrial wastewater was researched. The factors influencing adsorption process were discussed. The results indicated that the adsorption rates of Al^3＋ , Ca^2＋ , Mn^2＋ , Cu^2＋ , Fe^3＋ , Mg^2＋ , As^3＋ , Zn^2＋ are 99.34% , 99.82% , 98.26% , 98.16% , 97.76% , 97.01% , 100% and 89.09% , respectively under the optimal conditions. The residual concentration of metal elements are 0. 152, 0.07, 0. 012, 0.02, 0. 119, 0.311, 0 and 0. 259 mg/L, respectively which are lower than the first standard of integrated wastewater discharge standard.