钢渣构筑Fe-CSH吸附溶液中Pb(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)性能及机理

被引：1
|
作者：
单书月
罗中秋
周新涛
尚波
田鑫聪
阎崔蓉
机构：
[1] 昆明理工大学化学工程学院
来源：
化工进展 | 2024年 / 43卷 / 10期
关键词：
钢渣; 重金属; 铁质水合硅酸钙; 吸附性能; 吸附机理;
D O I：
暂无
中图分类号：
TQ424 [吸附剂]; X757 [黑色金属冶炼]; X703 [废水的处理与利用];
学科分类号：
摘要：
以钢渣为原位源、硅酸钠为活化剂合成多级孔结构的铁质水合硅酸钙（Fe-CSH），并将其作为吸附剂高效去除溶液中的Pb(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)等重金属。重点探究初始溶液pH、Fe-CSH投加量和溶液初始浓度对Pb(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)吸附性能的影响，并通过吸附动力学、热力学以及X射线衍射、傅里叶变换红外光谱、扫描电子显微镜、透射电子显微镜、比表面积分析、X射线光电子能谱等手段对其吸附机理进行解析。结果表明，Fe-CSH对Pb(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)的吸附过程均符合拟二级动力学模型，对Pb(Ⅱ)、Cu(Ⅱ)的吸附符合Langmuir模型，而对Zn(Ⅱ)的吸附更符合Freundlich模型，去除容量分别为1546mg/g、483mg/g和369mg/g；通过物理吸附、离子交换、沉淀和配位络合等作用机制实现重金属Pb(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)的高效去除。本研究遵循“以废治废”环保理念，对利用固体废弃物合成吸附剂的资源化利用和污水净化处理都具有重要意义。
引用
收藏
页码：5867 / 5880
页数：14
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