Journal
CHEMICAL ENGINEERING JOURNAL
Volume 308, Issue -, Pages 396-407Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.09.051
Keywords
Sodium percarbonate (SPC); Natural zeolite; Iron copper bimetals; Trichloroethylene (TCE); Heterogeneous Fenton catalyst
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Funding
- National Natural Science Foundation of China [41373094, 51208199]
- China Postdoctoral Science Foundation [2015M570341]
- Fundamental Research Funds for the Central Universities [22A201514057]
- KKS-the Knowledge Foundation of Sweden
- Malarenergi
- Eskilstuna Energi och Miljo
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Zeolite supported nano zero valent iron copper bimetallic composite (Z-nZVFe-Cu) was synthesized using an ion exchange method. The morphology and physico-chemical properties of the Z-nZVFe-Cu composite were determined using transmission electron microscopy (TEM), scanning electron microscopy (SEM), Brunauer Emmett Teller (BET), energy dispersive X-ray spectra (EDS), Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometer (XRD). The results showed that iron and copper nano particles were well dispersed on the zeolite sheet. The degradation efficiency of trichloroethylene (TCE) achieved was more than 95% using Z-nZVFe-Cu as a heterogeneous Fenton like catalyst. An efficient removal of total organic carbon (TOC) was promoted as compared to zeolite supported iron nano composite (Z-nZVFe) and unsupported nano iron (nZVFe). Electron spin resonance (ESR) detection confirmed the intensity of hydroxyl radicals (OH.) in the system. While benzoic acid (BA), a probe indicator for the quantification of OH., demonstrated the higher intensity of hydroxyl radicals in Z-nZVFe-Cu as compared to Z-nZVFe and nZVFe. The less iron and copper leaching of from Z-nZVFe-Cu presented its higher stability and better catalytic activity, displaying its potential long term applications for TCE degradation in groundwater. (C) 2016 Elsevier B.V. All rights reserved.
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