Position: Home > Articles > The preparation and application for the composite of nanoscale zero valent iron-zeolite adsorption to Cu~(2+) from aqueous solution
Journal of Agro-Environment Science
2017,36
(03)
583-590
沸石-纳米零价铁的制备及其对溶液中Cu~(2+)的吸附研究
作 者：
王顺利;王秀红;周新初;艾晓杰;邱江平;李银生
单 位：
上海交通大学农业与生物学院
关键词：
沸石-纳米零价铁复合材料;铜离子;吸附能力
摘 要：
采用液相还原法制备沸石-纳米零价铁复合材料,并通过添加不同质量的沸石得到不同铁与沸石比例的沸石-纳米零价铁复合材料(Z-nZVI),考查了不同比例复合材料对Cu~(2+)的吸附效果,确定最佳铁与沸石比例为1∶6,并对该比例材料、纳米零价铁与沸石进行了性状表征(包括:TEM、XRD及BET)。该比例复合材料对Cu~(2+)的吸附动力学实验结果表明,其吸附平衡时间约为1 h;动力学方程拟合结果表明,该材料的动力学过程更符合准二级动力学方程,且平衡吸附量达到515.46 mg·g~(-1)Fe0;对等温吸附实验数据进行Langmuir和Freundlich拟合结果表明,Langmuir方程更适用于描述沸石-纳米零价铁对Cu~(2+)的吸附。比较而言,沸石-纳米零价铁(1∶6)对于Cu~(2+)的吸附效果要优于纳米零价铁并远高于沸石。三因素三水平正交试验(溶液温度:25、35、45℃;pH:3、4、5;ZnZVI添加量:0.1、0.14、0.21 g·40 m L~(-1))结果表明,铁沸石比为1∶6的沸石-纳米零价铁对Cu~(2+)的最优吸附条件为:温度45℃,pH 3,Z-nZVI添加量0.21 g·40 m L~(-1)。上述结果表明沸石-纳米零价铁可应用于水体中Cu~(2+)的去除。
译 名：
The preparation and application for the composite of nanoscale zero valent iron-zeolite adsorption to Cu~(2+) from aqueous solution
作 者：
WANG Shun-li;WANG Xiu-hong;ZHOU Xin-chu;AI Xiao-jie;QIU Jiang-ping;LI Yin-sheng;School of Agriculture and Biology, Shanghai Jiao Tong University;
关键词：
zeolite-nanoscale zero valent iron(Z-nZVI);;Cu~(2+);;adsorption capacity
摘 要：
In this study, the composite of zeolite-nanoscale zero valent iron(Z-nZVI)was synthesized by liquid reduction and characterized by transmission electron microscopy(TEM)and X-ray diffraction(XRD). The specific surface area was determined using BrunauerEmmett-Teller(BET) measurement. The presence of zeolite in the composite resulted in decreased aggregation of iron nanoparticles and improved the surface area. The adsorption efficiency of Cu2 +by Z-nZVI with different ratio of Fe and zeolite was investigated. The results showed that the Z-nZVI with 1∶6 ratio of Fe to zeolite performed best. The adsorption kinetics of Cu~(2+)fitted better with pseudo-second order kinetics than with pseudo-first order kinetics. The equilibrium data were analyzed against the Langmuir and Freundlich isotherm models,which revealed that the Langmuir isotherm was the most suitable model for describing Cu~(2+)adsorption.The results of the three level orthogonal experiment showed that the optimal condition for Cu~(2+)adsorption by Z-nZVI was achieved through adding 0.21 g·40 m L~(-1)Z-nZVI to the solution with a pH of 3 and at a temperature of 45 ℃. Results support the potential use of the Z-nZVI composite for theremoval of Cu~(2+)from aqueous solution.
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