An efficient catalytic degradation of trichloroethene in a percarbonate system catalyzed by ultra-fine heterogeneous zeolite supported zero valent iron-nickel bimetallic composite

Muhammad Danish, Xiaogang Gu, Shuguang Lu, Usman Farooq, Waqas Qamar Zaman, Xiaori Fu, Zhouwei Miao, Mark L Brusseau, Ayyaz Ahmad, Muhammad Naqvi

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

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[rad]). The quantification of OH[rad] elucidated by using p-chlorobenzoic acid, a probe indicator, confirmed the higher intensity of OH[rad]. 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.

Original languageEnglish (US)
Pages (from-to)177-186
Number of pages10
JournalApplied Catalysis A: General
Volume531
DOIs
StatePublished - Feb 5 2017

Keywords

  • Groundwater remediation
  • Heterogeneous Fenton catalyst
  • Sodium percarbonate (SPC)
  • Trichloroethene (TCE)
  • Z-nZVI-Ni

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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