Photocatalytic degradation of aqueous methyl-tert-butyl-ether (MTBE) in a supported-catalyst reactor

Chan, M. S.; Lynch, R. J.

doi:10.1007/s10311-003-0037-4

Cited by 16 publications

(8 citation statements)

References 9 publications

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“…1 compare favourably with what has been achieved previously [7]. With respect to practical implementation on a large scale, it is important to note that improvements reported here were achieved with the addition of very small amounts of gold-indeed larger amounts would actually have degraded the photocatalytic activity [8].…”

Section: Resultssupporting

confidence: 78%

“…Another substance of concern, methyl tert-butyl ether MTBE (due to leakage from gasoline storage tanks), is among emerging pollutants of increasing concern in Europe and its use is already banned in many states of the US. Both constitute a serious and present hazard and, in addition to jeopardising water purity, contamination by such substances is a major obstacle to the re-development of polluted brown field sites for commercial or domestic [7], reducing pollution levels by more than 50% within a radius of influence of twice the reactor diameter.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio₂Modified with Gold Nanoparticles

Orlov

Chan²,

Jefferson³

et al. 2006

Environmental Technology

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Well characterised novel catalysts consisting of TiO2 modified with very small amounts of gold nanoparticles have been applied to the photocatalytic degradation of two important pollutants, methyl tert-butyl ether (MTBE) and 4-chlorophenol, in dilute aqueous solution using a fixed bed flow-through photocatalytic reactor. Although the thermal processing that was necessary for coating the reactor walls with the photocatalysts did lead to some loss of performance, the net gains in activity relative to unmodified TiO2 were nevertheless substantial and in excess of anything previously reported. Improvements in reaction rate by 50% and 100% for the removal of 4-chlorophenol and MTBE, respectively, were achieved. It was also found that effective removal of both pollutants could be achieved at water flow rates that are relevant to field applications involving the photocatalytic clean-up of contaminated groundwater. Due to their very small Au content, the cost of these materials is compatible with large scale use.

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Section: Resultssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio₂Modified with Gold Nanoparticles

Orlov

Chan²,

Jefferson³

et al. 2006

Environmental Technology

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“…MTBE was analyzed using a gas chromatograph (Agilent 6850 Series) with a flame ionisation detector (GC-FID) by an ambient headspace technique at 20°C as used in our previous study [22]. Each headspace sample was measured in triplicate .…”

Section: Methodsmentioning

confidence: 99%

Kinetic and equilibrium modelling of MTBE (methyl tert-butyl ether) adsorption on ZSM-5 zeolite: Batch and column studies

Zhang

Jin

Shen

et al. 2018

Journal of Hazardous Materials

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The intensive use of methyl tert-butyl ether (MTBE) as a gasoline additive has resulted in serious environmental problems due to its high solubility, volatility and recalcitrance. The feasibility of permeable reactive barriers (PRBs) with ZSM-5 type zeolite as a reactive medium was explored for MTBE contaminated groundwater remediation. Batch adsorption studies showed that the MTBE adsorption onto ZSM-5 follows the Langmuir model and obeys the pseudo-second-order model with an adsorption capacity of 53.55 mg g. The adsorption process reached equilibrium within 24 h, and MTBE was barely desorbed with initial MTBE concentration of 300 mg L. The mass transfer process is found to be primarily controlled by pore diffusion for MTBE concentrations from 100 to 600 mg L. pH has little effect on the maximum adsorption capacity in the pH range of 2-10, while the presence of nickel reduces the capacity with Ni concentrations of 2.5-25 mg L. In fixed-bed column tests, the Dose-Response model fits the breakthrough curve well, showing a saturation time of ∼320 min and a removal capacity of ∼18.71 mg g under the conditions of this study. Therefore, ZSM-5 is an extremely effective adsorbent for MTBE removal and has a huge potential to be used as a reactive medium in PRBs.

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“…previous studies (Chan and Lynch, 2003;Zhang et al, 2018b) using a gas chromatograph (Agilent 6850 Series) with a flame ionisation detector (GC-FID). Each headspace sample was measured in triplicate.…”

Section: Mtbe Concentration Was Analysed By An Ambient Headspace Techmentioning

confidence: 99%

Adsorption of methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: Fixed-bed column tests, breakthrough curve modelling and regeneration

et al. 2019

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ZSM-5, as a hydrophobic zeolite, has a good adsorption capacity for methyl tert-butyl ether (MTBE) in batch adsorption studies. This study explores the applicability of ZSM-5 as a reactive material in permeable reactive barriers (PRBs) to decontaminate the MTBE-containing groundwater. A series of laboratory scale fixed-bed column tests were carried out to determine the breakthrough curves and evaluate the adsorption performance of ZSM-5 towards MTBE under different operational conditions, including bed length, flow rate, initial MTBE concentration and ZSM-5 dosage, and regeneration tests were carried out at 80, 150 and 300°C for 24 h. Dose-Response model was found to best describe the breakthrough curves. MTBE was effectively removed by the fixed-bed column packed with a ZSM-5/sand mixture with an adsorption capacity of 31.85 mg•g-1 at 6 cm bed length, 1 mL•min-1 flow rate, 300 mg•L-1 initial MTBE concentration and 5% ZSM-5 dosage. The maximum adsorption capacity increased with the increase of bed length and the decrease of flow rate and MTBE concentration. The estimated kinetic parameters can be used to predict the dynamic behaviour of column systems. In addition, regeneration study shows that the adsorption capacity of ZSM-5 remains satisfactory (>85%) after up to four regeneration cycles.

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Photocatalytic degradation of aqueous methyl-tert-butyl-ether (MTBE) in a supported-catalyst reactor

Cited by 16 publications

References 9 publications

Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio₂Modified with Gold Nanoparticles

Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio₂Modified with Gold Nanoparticles

Kinetic and equilibrium modelling of MTBE (methyl tert-butyl ether) adsorption on ZSM-5 zeolite: Batch and column studies

Adsorption of methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: Fixed-bed column tests, breakthrough curve modelling and regeneration

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Photocatalytic degradation of aqueous methyl-tert-butyl-ether (MTBE) in a supported-catalyst reactor

Cited by 16 publications

References 9 publications

Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio2Modified with Gold Nanoparticles

Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio2Modified with Gold Nanoparticles

Kinetic and equilibrium modelling of MTBE (methyl tert-butyl ether) adsorption on ZSM-5 zeolite: Batch and column studies

Adsorption of methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: Fixed-bed column tests, breakthrough curve modelling and regeneration

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Product

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Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio₂Modified with Gold Nanoparticles

Photocatalytic Degradation of Water-Soluble Organic Pollutants on Tio₂Modified with Gold Nanoparticles