BTEX Removal from Aqueous Solution by Modified Multi-Walled Carbon Nanotubes With Ozone

Autores

  • Saeid Fadaei Environment Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran, and Student Research Committee and Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
  • Fahimeh Nakhzari Moghadam Department of Environmental Health, Faculty of Health, Zabol University of Medical Sciences, Zabol, Iran.
  • Majid Hashemi Environment Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran, and Student Research Committee and Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran. Department of Environmental Health Engineering, School of Health, Kerman University of Medical Sciences, Kerman, Iran.
  • Hamidreza Pourzamani Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran, and Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.

DOI:

https://doi.org/10.11137/2017_1_235_242

Palavras-chave:

BTEX, Ozone, Nanotubes, Aqueous Solution

Resumo

Modification of multi-walled carbon nanotube (MWCNT) via ozone was carried out to enhance removal of BTEX from aqueous solution. MWCNT was oxidized by ozone (MWCNT-O3) generator at %80 intensity for 5 min and in 30% NaOCl solution. The images of scanning electron microscopy (SEM) results indicated that the MWCNT-O3 have a lower degree of entanglement with increased porosity compared to the non-modified MWCNT. X-ray diffraction (XRD) test showed that structural crystallization was increased following the modification. After change, the Fourier transform infrared (FTIR) analysis showed that the peaks corresponded to the hydroxyl and carboxylic acid groups in MMWCNT-O3 were more intense than those in non-MMWCNT. The optimum condition for initial BTEX concentration, MWCNT-O3 dose, contact time, and pH was 100 mg/L, 2000 mg/L, 20 min, and 5 respectively. In this optimum condition the efficiency of MWCNT-O3 were increased by %43.5. This study concludes that this method is easy to use and also that ozone is an effective modifier for MWCNT in removal of BTEX compounds from the environment. Keywords: BTEX; Ozone; Nanotubes; Aqueous Solution

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Publicado

2018-07-12

Edição

v. 40 n. 1 (2017)

Seção

Artigos

Licença

Os artigos publicados nesta revista se encontram sob a llicença Creative Commons — Atribuição 4.0 Internacional — CC BY 4.0, que permite o uso, distribuição e reprodução em qualquer meio, contanto que o trabalho original seja devidamente citado.