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Catalytic wet air oxidation of high BPA concentration over iron-based catalyst supported on orthophosphate

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Abstract

The catalytic performance of Fe supported on nickel phosphate (NiP) was evaluated for the removal of bisphenol A (BPA) by catalytic wet air oxidation (CWAO) at 140 °C and 25 bar of pure oxygen pressure. The prepared NiP and Fe/NiP materials were fully characterized by XRD, N2-physisorption, H2-TPR, TEM, and ICP analysis. Iron (Fe/NiP) impregnation of NiP support enhanced the BPA removal efficiency from 37.0 to 99.6% when CWAO was performed. This catalyst was highly stable given the operating conditions of acidic medium, high temperature, and high pressure. The Fe/NiP catalyst showed an outstanding catalytic activity for oxidation of BPA, achieving almost complete removal of BPA in 180 min at a concentration of 300 mg/L, using 4 g/L of Fe/NiP. No iron leaching was detected after the CWAO of BPA. The stability of Fe/NiP was performed over three consecutive cycles, noting that BPA conversion was not affected and iron leaching was negligible. Therefore, this catalyst (Fe/NiP) could be considered as an innocuous and effective long-lasting catalyst for the oxidation of harmful organic molecules.

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Abbreviations

WAO:

Wet air oxidation

CWAO:

Catalytic wet air oxidation

BPA:

Bisphenol A

EDC:

Endocrine-disrupting chemical

AOPs:

Advanced oxidation processes

XRD:

X-ray diffraction

H2-TPR:

Temperature-programmed reduction

ICP-OES:

Inductively coupled plasma optical emission spectroscopy

TEM:

Transmission electron microscopy

TOC:

total Organic Carbon

COD:

Chemical oxygen demand

HPLC:

High-performance liquid chromatography

PFO:

Pseudo-first-order

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Funding

This study is financially supported by the European communities (FEDER), the “Region Nouvelle Aquitaine,” and the Project Partenariats Hubert Curien (PHC) Maghreb program (16MAG11) for funding Miss Kaissouni’s internships at IC2MP, Poitiers-France.

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Correspondence to Rachid Brahmi.

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The authors declare that they have no conflict of interest.

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Responsible Editor: Santiago V. Luis

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Kaissouni, F., Brahmi, R., Zbair, M. et al. Catalytic wet air oxidation of high BPA concentration over iron-based catalyst supported on orthophosphate. Environ Sci Pollut Res 27, 32533–32543 (2020). https://doi.org/10.1007/s11356-020-09176-3

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  • DOI: https://doi.org/10.1007/s11356-020-09176-3

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