Impact of microplastics on 4-chlorophenol degradation via MnOOH-catalyzed periodate activation

Author Identifier (ORCID)

Ali Fatehizadeh: https://orcid.org/0000-0001-6067-0637

Ensiyeh Taheri: https://orcid.org/0009-0009-4600-2179

Abstract

Phenolic compounds such as 4-chlorophenol (4-CP) are widely discharged from various industries that pose significant threats to human health and environment due to their toxicity and resistance to conventional treatment methods. In this study, hydrothermally synthesized MnOOH was used to activate periodate (PI), forming PI/MnOOH for degradation of 4-CP. The effect of microplastic (MP) coexistence on the performance of PI/MnOOH was evaluated. The degradation of 4-CP by PI/MnOOH was 92.53 ± 0.93 %, much higher than PI oxidation itself (23.85 ± 1.19 %) and that of MnOOH alone (11.82 ± 0.59 %), confirming the effective activation of IO4− ions by the synthesized MnOOH to generate free radicals. The PI/MnOOH process achieved degradation efficiency of 98.75 % at solution pH of 3 with a kinetic rate constant (kobs) of 0.062 ± 0.003 min−1. The quenching experiments suggested that reactive species, including IO3• (93.94 %), 1O2 (88.03 %), O2•− (61.97 %), and •OH (27.42 %) were detected. The degradation efficiency of 4-CP without MP was 97.54 ± 0.98 %, which decreased to 94.57 ± 4.73 %, 88.67 ± 4.43 %, and 68.95 ± 0.69 % in the presence of polyethylene terephthalate (PET), polystyrene (PS), and polyvinyl chloride (PVC), respectively due to electrostatic interactions between the positively charged MnOOH and the negatively charged MPs as well as pore-blocking effects. This work provides new insights into MP interference in PI/MnOOH based advanced oxidation processes and highlights their environmental implications.

Document Type

Journal Article

Date of Publication

10-1-2025

Volume

393

PubMed ID

40829217

Publication Title

Journal of Environmental Management

Publisher

Elsevier

School

School of Engineering

Funders

Isfahan University of Medical Sciences of Iran (3401731)

Comments

Ghadiri, F., Fatehizadeh, A., Taheri, E., Ebrahimpour, K., & Aminabhavi, T. M. (2025). Impact of microplastics on 4-chlorophenol degradation via MnOOH-catalyzed periodate activation. Journal of Environmental Management, 393, 127019. https://doi.org/10.1016/j.jenvman.2025.127019

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Link to publisher version (DOI)

10.1016/j.jenvman.2025.127019