Eco-friendly and effectively glyphosate removal using novel banana peel-derived biopolymer-supported CoFe₂O₄ activated peroxydisulfate: kinetic and mechanism insights.

Authors

Lan Huong Nguyen, Thanh Nghia Pham, Nam Thai Van

Published in

Environmental geochemistry and health. Volume 47. Issue 7. Pages 267. Jun 13, 2025. Epub Jun 13, 2025.

Abstract

In this work, an eco-friendly and novel heterogeneous catalyst deriving biopolymer extracted from banana peel for supporting CoFe₂O₄ (CoFe₂O₄@BP-BiP) was successfully developed to activate peroxydisulfate (PDS) for mineralization removal of glyphosate (GP) herbicide from wastewater. GP mineralization performance, evaluating via COD removal efficiency, in CoFe₂O₄@BP-BiP/PDS system was compared with that in CoFe₂O₄/PDS system under various operational conditions. The chemical-physical properties were systematically analyzed to explore the mineralization mechanisms of GP. Quenching and competitive anion tests were conducted to study mineralization mechanisms of GP by CoFe₂O₄@BP-BiP activing PDS during catalytic process. The results illustrate that composition of BP-BiP and CoFe₂O₄ remarkably reduced the agglomeration of nanoparticles and enriching oxygen-containing functional groups (OCFGs), which accelerated electron transfer cycles of Co³⁺/Co²⁺ and Fe³⁺/Fe²⁺ redox couples to continuously regenerate Fe²⁺ and Co²⁺. This led to the effective decomposition of PDS, generating more reactive oxygen species (ROS) for promoted mineralization of GP. CoFe₂O₄@BP-BiP system exhibited higher GP mineralization performance and rate, approximately twofold greater than the CoFe₂O₄/PDS system. Mechanistic studies showed that GP mineralization occurred via both non-free radical and free radical pathways, involving ROS such as singlet oxygen (¹O₂) and radicals (^*SO₄^-, ^*OH, ^*O₂^-). Additionally, CoFe₂O₄@BP-BiP demonstrated excellent stability and reusability across five consecutive runs with minimal Co and Fe leaching. These findings suggest that CoFe₂O₄@BP-BiP is an effective and sustainable catalyst for activating PDS in the removal of glyphosate from wastewater.

PMID:
40512430
Bibliographic data and abstract were imported from PubMed on 13 Jun 2025.

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