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| The preparation and application for the composite of nanoscale zero valent iron-zeolite adsorption to Cu2+ from aqueous solution |
| Received:September 18, 2016 |
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| KeyWord:zeolite-nanoscale zero valent iron(Z-nZVI);Cu2+;adsorption capacity |
| Author Name | Affiliation | E-mail | | WANG Shun-li | School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China | | | WANG Xiu-hong | School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China | | | ZHOU Xin-chu | School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China | | | AI Xiao-jie | School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China | | | QIU Jiang-ping | School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China | | | LI Yin-sheng | School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China | yinshengli.@sjtu.edu.cn |
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| Abstract: |
| 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 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 orthogonal 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. |
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