蒙脱石负载纳米铁镍去除水中溴酸盐研究
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摘要
微污染饮用水处理过程中越来越趋向于选择臭氧氧化技术。含溴水在臭氧氧化过程中会生成2B级致癌物溴酸盐。纳米零价铁能较有效地去除多种污染物,本文制备了纳米铁,并对其进行了镍负载和蒙脱石负载,且做了对照实验。结果:随着纳米铁投加量的增加,投加到溶液中的活性位点越多,与溴酸盐的接触位点增加,使去除速率和效率增加;对比纳米铁,蒙脱石负载纳米铁镍具有更大的比表面积,因此对溴酸盐的去除速率明显更快,所需纳米材料投加量更少。
In the process of micro polluted drinking water treatment,ozone oxidation technology is becoming more and more popular. Containing water in the ozone oxidation process will generate 2B carcinogen bromate. Nano zero valent iron can effectively remove a variety of pollutants. Nano iron was prepared,and its nickel loading and montmorillonite loading were carried out. The results showed that with the increase of the dosage,more and more active sites added to the solution,contact sites and bromate increased,the removal rate and increase efficiency. Compared with iron nanoparticles,supported on montmorillonite nano Fe/Ni had more than the surface area,so the removal rate of bromate was faster and required less dosage of nano materials.
In the process of micro polluted drinking water treatment,ozone oxidation technology is becoming more and more popular. Containing water in the ozone oxidation process will generate 2B carcinogen bromate. Nano zero valent iron can effectively remove a variety of pollutants. Nano iron was prepared,and its nickel loading and montmorillonite loading were carried out. The results showed that with the increase of the dosage,more and more active sites added to the solution,contact sites and bromate increased,the removal rate and increase efficiency. Compared with iron nanoparticles,supported on montmorillonite nano Fe/Ni had more than the surface area,so the removal rate of bromate was faster and required less dosage of nano materials.
引文
[1]朱琦.饮用水处理过程中溴酸盐的生成特性及优化控制研究[D].哈尔滨:哈尔滨工业大学,2012.
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[5]Ponder S M,Darab J G,Mallouk T E.Remediation of Cr(Ⅵ)and Pb(Ⅱ)aqueous solutions using supported,nanoscale zero-valent iron[J].Environmental Science and Technology,2000,34(12):2564-2569.
[6]徐咏咏.改性纳米零价铁去除水中溴酸盐的研究[D].杭州:浙江大学土木工程学系,2013.
[7]刘蕊,周启星,马奇英.纳米材料在污染水体和土壤修复中的应用[J].生态学杂志,2010,29(9):1852-1859.
[2]杨麒,伍秀琼,钟宇,等.活性炭负载纳米零价铁去除溴酸盐的研究[J].湖南大学学报(自然版),2013,40(12):97-102.
[3]GILLHAM R W,O'HANNESIN S F.Enhanced degradation of halogenated aliphatics by zero-valent iron[J].Ground Water,1994,32(6):958-967.
[4]刘润生,张燕.饮用水中溴酸盐的去除技术[J].环境科学与技术,2010,33(12):66-70.
[5]Ponder S M,Darab J G,Mallouk T E.Remediation of Cr(Ⅵ)and Pb(Ⅱ)aqueous solutions using supported,nanoscale zero-valent iron[J].Environmental Science and Technology,2000,34(12):2564-2569.
[6]徐咏咏.改性纳米零价铁去除水中溴酸盐的研究[D].杭州:浙江大学土木工程学系,2013.
[7]刘蕊,周启星,马奇英.纳米材料在污染水体和土壤修复中的应用[J].生态学杂志,2010,29(9):1852-1859.