期刊
APPLIED CATALYSIS A-GENERAL
卷 531, 期 -, 页码 177-186出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2016.11.001
关键词
Trichloroethene (TCE); Heterogeneous Fenton catalyst; Sodium percarbonate (SPC); Z-nZVI-Ni; Groundwater remediation
资金
- 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
- NIEHS Superfund Research Program [P42 ES04940]
- Malarenergi
- Eskilstuna Energi och Miljo
Zeolite supported nano iron-nickel bimetallic composite (Z-nZVI-Ni) was prepared using a liquid-phase reduction process. The corresponding surface morphologies and physico-chemical properties of the Z-nZVI-Ni composite were determined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Energy dispersive X-ray spectra (EDS), Brunauer Emmett Teller (BET) adsorption, wide angle X-ray diffractometry (WA-XRD), and Fourier transform infrared spectroscopy (FTIR). The results indicated high dispersion of iron and nickel nano particles on the zeolite sheet with an enhanced surface area. Complete destruction of trichloroethene (TCE) and efficient removal of total organic carbon (TOC) were observed by using Z-nZVI-Ni as a heterogeneous catalyst for a Fenton-like oxidation process employing sodium percarbonate (SPC) as an oxidant. The electron spin resonance (ESR) of Z-nZVI-Ni verified the generation and intensity of hydroxyl radicals (OH center dot). The quantification of OH center dot elucidated by using p-chlorobenzoic acid, a probe indicator, confirmed the higher intensity of OH center dot. The transformation products were identified using GC-MS. The slow iron and nickel leaching offered higher stability and better catalytic activity of Z-nZVI-Ni, demonstrating its prospective long term applications in groundwater for TCE degradation. (C) 2016 Elsevier B.V. All rights reserved.
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