高炉镍铁渣基地聚合物多孔材料去除废水中Cu(Ⅱ)、Pb(Ⅱ)、Cr(Ⅵ)
李月盈 , 邵周军 , 罗中秋 , 叶长青 , 阎崔蓉 , 周新涛
现代化工 ›› 2025, Vol. 45 ›› Issue (5) : 175 -182.
高炉镍铁渣基地聚合物多孔材料去除废水中Cu(Ⅱ)、Pb(Ⅱ)、Cr(Ⅵ)
Removal of Cu(Ⅱ),Pb(Ⅱ) and Cr(Ⅵ) from wastewater by blast furnace nickel-iron slag based geopolymer porous materials
以工业废渣高炉镍铁渣为原料,在NaOH和水玻璃活化条件下,制备具有丰富孔道结构的地聚合物多孔材料,并用于吸附废水中的Cu(Ⅱ)、Pb(Ⅱ)、Cr(Ⅵ)。考察了吸附剂投加量、溶液pH、不同接触时间和金属离子初始浓度以及温度对吸附效果的影响。相关表征及吸附结果显示,高炉镍铁渣地聚合物多孔材料在pH分别为5、5、1时,Cu(Ⅱ)、Pb(Ⅱ)、Cr(Ⅵ)的去除率可达91.3%、93.1%、96.5%。吸附动力学和等温线结果表明,高炉镍铁渣基地聚合物多孔材料对Cu(Ⅱ)和Pb(Ⅱ)的吸附过程符合拟二级动力学模型,对Cr(Ⅵ)的吸附过程符合一级动力学模型,且吸附过程都符合Langmuir模型,表明高炉镍铁渣基地聚合物多孔材料表面吸附Cu(Ⅱ)、Pb(Ⅱ)、Cr(Ⅵ)过程以单分子层吸附为主。
Geopolymer porous material with rich pore structure is prepared from blast furnace nickel-iron slag under the activation conditions of NaOH and sodium silicate,and used to adsorb Cu(Ⅱ),Pb(Ⅱ),and Cr(Ⅵ) in wastewater.The influences of adsorbent dosage,solution pH,contact time and the initial concentrations of metal ions as well as temperature on the adsorption effect are studied.The relevant characterization and adsorption results indicate that the removal rates of Cu(Ⅱ),Pb(Ⅱ),Cr(Ⅵ) by the geopolymer porous material made from blast furnace nickel-iron slag can reach 91.3%,93.1% and 96.5% at a pH of 5,5 and 1,respectively.The adsorption kinetics and isotherm results show that the adsorption process of Cu(Ⅱ) and Pb(Ⅱ) by the material is in accordance with the pseudo second order kinetic model,and that of Cr(Ⅵ) is in accordance with the first order kinetic model.Furthermore,and the adsorption processes for the three kinds of heavy metals are in accordance with the Langmuir model.It is indicated that the adsorption of Cu(Ⅱ),Pb(Ⅱ),and Cr(Ⅵ) on the surface of the prepared geopolymer porous material is dominated by the monomolecular layer adsorption.
blast furnace nickel-iron slag / adsorption / heavy metals / geopolymer porous materials
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云南省教育厅科学研究基金项目(2023J1526)
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