Fe_3O_4@(SDS-HTlc)纳米复合物的制备及对甲基橙的吸附
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摘要
采用离子交换法制备了具有核-壳结构的磁性十二烷基硫酸钠改性类水滑石Fe_3O_4@(SDSHTlc)纳米复合物,并利用透射电镜、粉末X-射线衍射、红外光谱、电感耦合等离子体发射光谱、元素分析等对其进行了表征。研究了Fe_3O_4@(SDS-HTlc)对甲基橙的吸附动力学和热力学。结果表明,Fe_3O_4@(SDSHTlc)对甲基橙有较好吸附效果,吸附动力学曲线符合准二级动力学方程;吸附等温线符合线性方程,吸附量随体系p H的增大和温度的升高均降低。在外部磁场下,30s内可从水溶液中分离出Fe_3O_4@(SDS-HTlc),这为去除水中疏水染料提供了简单的一步吸附处理方法。
In this paper,magnetic hydrotalcite-like compound modified with sodium dodecylsulfate( Fe_3O_4@( SDS-HTlc)) nanocomposite was prepared by ion-exchange method. The samples were characterized by transmission electron microscope,powder X ray diffractometer,infrared spectrometer,elemental analysis etc. The adsorption property of Fe_3O_4@( SDS-HTlc) nanocomposite for methyl orange was studied by adsorption kinetics and thermodynamics. The experimental results showed that the adsorption kinetics conforms to the pseudo-second-order kinetic equation,and the adsorption isotherm agrees well with the linear equation. The adsorption amount of Fe_3O_4@( SDS-HTlc) for methyl orange decreased with increasing p H( and temperature). Fe_3O_4@( SDS-HTlc)nanocomposite can be easily separated from aqueous solution by the external magnetic field in 30 s,which provides a simple single step adsorption treatment option for removing dyes from water.
In this paper,magnetic hydrotalcite-like compound modified with sodium dodecylsulfate( Fe_3O_4@( SDS-HTlc)) nanocomposite was prepared by ion-exchange method. The samples were characterized by transmission electron microscope,powder X ray diffractometer,infrared spectrometer,elemental analysis etc. The adsorption property of Fe_3O_4@( SDS-HTlc) nanocomposite for methyl orange was studied by adsorption kinetics and thermodynamics. The experimental results showed that the adsorption kinetics conforms to the pseudo-second-order kinetic equation,and the adsorption isotherm agrees well with the linear equation. The adsorption amount of Fe_3O_4@( SDS-HTlc) for methyl orange decreased with increasing p H( and temperature). Fe_3O_4@( SDS-HTlc)nanocomposite can be easily separated from aqueous solution by the external magnetic field in 30 s,which provides a simple single step adsorption treatment option for removing dyes from water.
引文
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[4]毕浩宇,李燕,周丹等.化学通报,2018,81(2):175~181.
[5]张华春,熊国臣.染料与染色,2016,53(3):45~51.
[6]刘斌,顾洁,邱盼等.环境科学学报,2014,34(9):2256~2264.
[7] Y You,H Zhao,G F Vance. Colloid. Surf. A,2002,205(3):161~172.
[8] Q Lv,Q Li,H Y Sun et al. Micropor. Mesopor. Mater.,2014,18(1):7~13.-
[9]赖立,谢强,方文侃等.环境科学,2016,37(4):1444~1450.
[10]薛娟琴,徐尚元,朱倩文等.无机化学学报,2016,32(9):1503~1511.
[11] L Yan,K Yang,R Shan et al. J. Colloid. Interf. Sci.,2015,448(1):508~516.
[12]赵满,徐洁,侯万国.高等学校化学学报,2012,33(7):1572~1578.
[13] X L Peng,F Xu,W Z Zhang et al. Colloid. Surf. A,2014,443(4):27~36.
[14] Z P Xu,Q H Zeng,G Q Lu et al. Chem. Eng. Sci.,2006,61(3):1027~1040.
[15] H Zhang,D Pan,X Duan. J. Phys. Chem. C,2009,113(28):12140~12148.
[16] V Ambrogi,G Fardella,G Grandolini et al. Int. J. Pharm.,2001,220(1/2):23~32.
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[18] Z P Liu,R Z Ma,M Osada et al. J. Am. Chem. Soc.,2006,128(14):4872~4880.
[19]李冬,陈华军.环境科学与管理,2009,34(3):109~111.
[20] M Al-Ghouti,M A M Khraisheh,M N M Ahmad et al. J.Colloid Interf. Sci.,2005,287(1):6~13.
[21]罗刚,张全兴,李爱民等.应用化学,2003,20(12):1139~1142.
[22] J Z Farhade,H Y Aziz. Chin. J. Chem.,2010,28(3):349~356.