功能化火山石对重金属废水中Cu~(2+)吸附性能研究
|
摘要
通过对火山石进行热处理和强酸强碱改性,得到了性能优良的火山石吸附材料。利用SEM、BET对三种火山石进行结构表征,并探讨了pH、离子强度、吸附时间、初始浓度对改性火山石去除铜离子废水吸附效果的影响。强酸强碱改性火山石的吸附性能最为优异,在pH=5、无机盐浓度为20 mmol/L条件下,吸附150 min可达到饱和状态,吸附量可达0. 35 mmol/g。等温吸附行为符合Langmuir和Freundlich吸附模型,且Langmuir等温吸附模型的拟合效果更好;动力学吸附行为更符合准二级动力学模型,主要表现为离子交换过程。
Through the modification of volcanoes with heating or strong acid/alkali,volcano adsorption materials capable of removing heavy metal ions efficiently were obtained. The structures of volcanoes with or without modification were characterized by BET and SEM,and effects of initial concentration,pH,ionic strength and adsorption time on the removal of Cu~(2+) were investigated. The volcanoes treated with strong acid/alkali presented the best adsorption performance,and the adsorption capacity attained to 0. 35 mmol/g at pH = 5 and CNaNO_3= 20 mmol/L,also the saturated adsorption can be reached in 150 min. The isothermal adsorption behavior can be well described by Langmuir and Freundlich adsorption models,and Langmuir isothermal adsorption model fitted better. The kinetic adsorption behavior agreed better with the quasi-second-order kinetic model than quasi-one-order kinetic model,which indicated that it was mainly controlled by a chemical adsorption process.
Through the modification of volcanoes with heating or strong acid/alkali,volcano adsorption materials capable of removing heavy metal ions efficiently were obtained. The structures of volcanoes with or without modification were characterized by BET and SEM,and effects of initial concentration,pH,ionic strength and adsorption time on the removal of Cu~(2+) were investigated. The volcanoes treated with strong acid/alkali presented the best adsorption performance,and the adsorption capacity attained to 0. 35 mmol/g at pH = 5 and CNaNO_3= 20 mmol/L,also the saturated adsorption can be reached in 150 min. The isothermal adsorption behavior can be well described by Langmuir and Freundlich adsorption models,and Langmuir isothermal adsorption model fitted better. The kinetic adsorption behavior agreed better with the quasi-second-order kinetic model than quasi-one-order kinetic model,which indicated that it was mainly controlled by a chemical adsorption process.
引文
[1]雷兆武,耿世刚,王玉玲,等.膜电解处理含铜电镀废水研究[J].电镀与精饰,2012,34(2):40.
[2]鲁栋梁,夏璐.重金属废水处理方法与进展[J].化工技术与开发,2008,37(12):32.
[3]薛美琴,陈建琴,林玉凤.微波辅助改性沸石对水中铜的吸附研究[J].工业水处理,2014,34(3):36-39.
[4]朱林峰,黄豆豆,高如琴,等.硅藻土基多孔陶粒的制备及对Cu2+吸附性能研究[J].江苏农业科学,2014,42(3):303-305.
[5] Brigatti M F,Lugli C,Poppi L. Kinetics of heavy-metal removal and recovery in sepiolite[J]. Applied Clay Science,2000,16(1/2):45-57.
[6] Paluszkiewicz C,WZabiński. NIR spectra of vesuvianite-A complex ortho-disilicate mineral[J]. Journal of Molecular Structure,1999,480:683-688.
[7]聂风,熊正为,黄建洪,等.改性火山石-PAC复合絮凝剂处理城镇生活污水试验研究[J].水处理技术,2014,38(4):87.
[8]王宜鑫.粘土矿物材料对重金属离子的吸附机理探讨[D].扬州大学,2007.
[9] Tuong T L(陈理想).有机粘土矿物的制备与表征及其对重金属吸附性能的研究[D].华南理工大学,2015.
[10]聂凤.合流制排水系统调蓄池絮凝调蓄及排沙技术研究[D].南华大学,2012.
[11]冯其明,王倩,刘琨,等.纤蛇纹石吸附Cu(Ⅱ)的动力学及热力学研究[J].中南大学学报(自然科学版),2011,42(11):3227-3228.
[2]鲁栋梁,夏璐.重金属废水处理方法与进展[J].化工技术与开发,2008,37(12):32.
[3]薛美琴,陈建琴,林玉凤.微波辅助改性沸石对水中铜的吸附研究[J].工业水处理,2014,34(3):36-39.
[4]朱林峰,黄豆豆,高如琴,等.硅藻土基多孔陶粒的制备及对Cu2+吸附性能研究[J].江苏农业科学,2014,42(3):303-305.
[5] Brigatti M F,Lugli C,Poppi L. Kinetics of heavy-metal removal and recovery in sepiolite[J]. Applied Clay Science,2000,16(1/2):45-57.
[6] Paluszkiewicz C,WZabiński. NIR spectra of vesuvianite-A complex ortho-disilicate mineral[J]. Journal of Molecular Structure,1999,480:683-688.
[7]聂风,熊正为,黄建洪,等.改性火山石-PAC复合絮凝剂处理城镇生活污水试验研究[J].水处理技术,2014,38(4):87.
[8]王宜鑫.粘土矿物材料对重金属离子的吸附机理探讨[D].扬州大学,2007.
[9] Tuong T L(陈理想).有机粘土矿物的制备与表征及其对重金属吸附性能的研究[D].华南理工大学,2015.
[10]聂凤.合流制排水系统调蓄池絮凝调蓄及排沙技术研究[D].南华大学,2012.
[11]冯其明,王倩,刘琨,等.纤蛇纹石吸附Cu(Ⅱ)的动力学及热力学研究[J].中南大学学报(自然科学版),2011,42(11):3227-3228.