农业环境科学学报2017，Vol.36Issue(3)：583-590,8.DOI:10.11654/jaes.2016-1209
沸石-纳米零价铁的制备及其对溶液中Cu2+的吸附研究
The preparation and application for the composite of nanoscale zero valent iron-zeolite adsorption to Cu2+ from aqueous solution
摘要
Abstract
In this study, the composite of zeolite-nanoscale zero valent iron(Z-nZVI)was synthesized by liquid reduction and character-ized by transmission electron microscopy(TEM)and X-ray diffraction(XRD). The specific surface area was determined using Brunauer-Emmett-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 Cu2+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 Cu2+adsorption.The results of the three level orthogo-nal experiment showed that the optimal condition for Cu2+adsorption by Z-nZVI was achieved through adding 0.21 g·40 mL-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 Cu2+from aqueous solution.关键词
沸石-纳米零价铁复合材料/铜离子/吸附能力Key words
zeolite-nanoscale zero valent iron(Z-nZVI)/Cu2+/adsorption capacity分类
资源环境引用本文复制引用
王顺利,王秀红,周新初,艾晓杰,邱江平,李银生..沸石-纳米零价铁的制备及其对溶液中Cu2+的吸附研究[J].农业环境科学学报,2017,36(3):583-590,8.基金项目
国家自然科学基金项目(41471203) The National Natural Science Foundation of China(41471203) （41471203）
