摘要
为实现锂盐固废的资源化利用,以锂盐固废为原料,通过高温活化预处理结合碱激发技术成功制备了地质聚合物多孔材料,利用XRD,FT-IR和Image-Pro Plus软件对其物相、结构与形貌进行了表征,通过单因素实验研究了NaOH溶液浓度、液固比、H_(2)O_(2)用量及油(稳泡剂)用量对材料性能的影响,得到最佳制备参数,并以最佳参数下制备的多孔材料进行了Cu^(2+)吸附试验。结果表明:700℃煅烧2 h能够显著提升锂盐固废的活性;在锂盐固废100 g、NaOH浓度8 mol/L、液固比0.45、H_(2)O_(2)用量0.8 mL和油用量1.0 mL的最佳制备条件下,多孔材料孔隙率达到48%,表观密度为0.44 g/cm^(3),且对Cu^(2+)浓度为200 mg/L溶液(CuSO_(4)·5H_(2)O)中的Cu^(2+)吸附率达41.6%,吸附容量为8.52 mg/g。高温活化预处理结合碱激发技术制备的地质聚合物多孔材料轻质多孔,具有一定的重金属吸附能力,为固废增值利用和含重金属离子废水处理提供了可行方案。
To achieve the resource utilization of lithium salt solid waste,geopolymer porous materials were successfully prepared using lithium salt solid waste as the raw material through high-temperature activation pretreatment combined with alkali activation technology.The phase composition,structure,and morphology of the materials were characterized using XRD,FT-IR,and Image-Pro Plus software.The effects of NaOH solution concentration,liquid-to-solid ratio,H_(2)O_(2)dosage,and oil(foam stabilizer)dosage on material properties were studied through single factor experiments,and the optimal preparation parameters were obtained.The porous materials prepared under optimal conditions were further tested for Cu^(2+)adsorption.The results show that calcination at 700℃for 2 h significantly enhance the activity of the lithium salt solid waste.Under the optimal preparation parameters of 100 g of lithium salt solid waste,8 mol/L NaOH concentration,liquid-to-solid ratio of 0.45,0.8 mL H_(2)O_(2),and 1.0 mL oil,the porous material achieves a porosity of_(4)8%and an apparent density of 0.44 g/cm^(3).Additionally,it exhibits a Cu^(2+)adsorption rate of_(4)1.6%and an adsorption capacity of 8.52 mg/g in a_(2)00 mg/L CuSO_(4)·5H_(2)O solution.The geopolymer porous material prepared by high-temperature activation pretreatment combined with alkali activation technology is lightweight and porous,with certain heavy metal adsorption capacity,providing a feasible solution for the value-added utilization of solid waste and the treatment of wastewater containing heavy metal ions.
作者
吴文权
曹林洪
刘来宝
罗旭
张高寅
罗广
赵澎
WU Wenquan;CAO Linhong;LIU Laibao;LUO Xu;ZHANG Gaoyin;LUO Guang;ZHAO Peng(School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Shunying Lithium Material Technology Co.,Ltd.,Meishan 620000,Sichuan,China)
出处
《西南科技大学学报》
2025年第3期1-10,共10页
Journal of Southwest University of Science and Technology
基金
国家自然科学基金项目(5208292)
四川省自然科学基金青年基金项目(2024NSFSC0914)。
关键词
锂盐固废
高温活化
地质聚合物
多孔材料
Lithium salt solid waste
High temperature activation
Geopolymer
Porous material
