The role of multiwalled carbon nanotubes (MWCNTs) in the catalytic ozonation of atrazine

Xiaolei Fan; João Restivo; José J.M. Órfão; Manuel Fernando R. Pereira; Alexei A. Lapkin

doi:10.1016/j.cej.2013.12.023

The role of multiwalled carbon nanotubes (MWCNTs) in the catalytic ozonation of atrazine

Xiaolei Fan, João Restivo, José J.M. Órfão, Manuel Fernando R. Pereira, Alexei A. Lapkin

Research output: Journal Publication › Article › peer-review

73 Citations (Scopus)

Abstract

Multiwalled carbon nanotubes (MWCNTs) are used as catalysts in ozonation of atrazine in aqueous solutions. The catalyst changed the distribution of atrazine degradation intermediates, leading to the decrease in the effluent toxicity compared to non-catalytic ozonation and an increase in the overall mineralisation of atrazine. However, the overall rate of atrazine conversion was somewhat reduced in the presence of the nanotube catalyst (apparent rate constant: 0.233min^-1 versus 0.143min^-1 in the presence of the nanotubes). Detailed analysis of intermediates in catalysed and non-catalysed reactions allowed to propose the likely reaction pathway in the presence of the nanotubes.

Original language	English
Pages (from-to)	66-76
Number of pages	11
Journal	Chemical Engineering Journal
Volume	241
DOIs	https://doi.org/10.1016/j.cej.2013.12.023
Publication status	Published - 1 Apr 2014
Externally published	Yes

Keywords

Advanced oxidation processes (AOPs)
Atrazine
Catalytic ozonation
Multiwalled carbon nanotubes (MWCNTs)

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cej.2013.12.023

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title = "The role of multiwalled carbon nanotubes (MWCNTs) in the catalytic ozonation of atrazine",

abstract = "Multiwalled carbon nanotubes (MWCNTs) are used as catalysts in ozonation of atrazine in aqueous solutions. The catalyst changed the distribution of atrazine degradation intermediates, leading to the decrease in the effluent toxicity compared to non-catalytic ozonation and an increase in the overall mineralisation of atrazine. However, the overall rate of atrazine conversion was somewhat reduced in the presence of the nanotube catalyst (apparent rate constant: 0.233min-1 versus 0.143min-1 in the presence of the nanotubes). Detailed analysis of intermediates in catalysed and non-catalysed reactions allowed to propose the likely reaction pathway in the presence of the nanotubes.",

keywords = "Advanced oxidation processes (AOPs), Atrazine, Catalytic ozonation, Multiwalled carbon nanotubes (MWCNTs)",

author = "Xiaolei Fan and Jo{\~a}o Restivo and {\'O}rf{\~a}o, {Jos{\'e} J.M.} and Pereira, {Manuel Fernando R.} and Lapkin, {Alexei A.}",

note = "Funding Information: This work was supported by the European Community{\textquoteright}s Seventh Framework Programme [FP7/2007–2013] under project “MONACAT”, project reference 226347 and project “FREECATS”, project reference 280658. J.R. acknowledges the Grant received from FCT (SFRH/BD/95751/2012). ",

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doi = "10.1016/j.cej.2013.12.023",

language = "English",

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AU - Fan, Xiaolei

AU - Restivo, João

AU - Órfão, José J.M.

AU - Pereira, Manuel Fernando R.

AU - Lapkin, Alexei A.

N1 - Funding Information: This work was supported by the European Community’s Seventh Framework Programme [FP7/2007–2013] under project “MONACAT”, project reference 226347 and project “FREECATS”, project reference 280658. J.R. acknowledges the Grant received from FCT (SFRH/BD/95751/2012).

PY - 2014/4/1

Y1 - 2014/4/1

N2 - Multiwalled carbon nanotubes (MWCNTs) are used as catalysts in ozonation of atrazine in aqueous solutions. The catalyst changed the distribution of atrazine degradation intermediates, leading to the decrease in the effluent toxicity compared to non-catalytic ozonation and an increase in the overall mineralisation of atrazine. However, the overall rate of atrazine conversion was somewhat reduced in the presence of the nanotube catalyst (apparent rate constant: 0.233min-1 versus 0.143min-1 in the presence of the nanotubes). Detailed analysis of intermediates in catalysed and non-catalysed reactions allowed to propose the likely reaction pathway in the presence of the nanotubes.

AB - Multiwalled carbon nanotubes (MWCNTs) are used as catalysts in ozonation of atrazine in aqueous solutions. The catalyst changed the distribution of atrazine degradation intermediates, leading to the decrease in the effluent toxicity compared to non-catalytic ozonation and an increase in the overall mineralisation of atrazine. However, the overall rate of atrazine conversion was somewhat reduced in the presence of the nanotube catalyst (apparent rate constant: 0.233min-1 versus 0.143min-1 in the presence of the nanotubes). Detailed analysis of intermediates in catalysed and non-catalysed reactions allowed to propose the likely reaction pathway in the presence of the nanotubes.

KW - Advanced oxidation processes (AOPs)

KW - Atrazine

KW - Catalytic ozonation

KW - Multiwalled carbon nanotubes (MWCNTs)

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JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

The role of multiwalled carbon nanotubes (MWCNTs) in the catalytic ozonation of atrazine

Abstract

Keywords

ASJC Scopus subject areas

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