Co0.59Fe0.41P nanocubes derived from nanoscale metal-organic frameworks for removal of diethyl phthalate by activation of peroxymonosulfate

In this study, Co0.59Fe0.41P nanocubes were derived from nanoscale metal-organic frameworks to activate peroxymonosulfate (PMS) for the diethyl phthalate (DEP) removal in water. The structure, morphology, and physicochemical properties of the fresh and used materials were comprehensively studied using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectric spectroscopy. Degradation tests were performed and an excellent degradation performance was observed. The achieved DEP removal rate within a 60 min period was approximately 95%. Electron paramagnetic resonance (EPR) analysis and quenching tests showed that both sulfate and hydroxyl radicals contributed to the removal of the pollutant. The degradation products were detected by GC-MS and UHPLC-Q-TOF-MS, and the proposed degradation pathways were concluded. The study showed that the cobalt elements in the materials were the primary contributors for the activation of PMS for the removal of DEP. The reduction ability of PMS could assist in the recycling of Co3+/Co2+.