Degradation of UV Filter Ethyl 4-Aminobenzoate (Et-PABA) Using a UV-Activated Persulfate Oxidation Process
Source abstract
Abstract
In this paper, the ultraviolet/persulfate (UV/PDS) combined oxidation process was used to remove the ethyl 4-aminobenzoate (Et-PABA), one of the typical 4-aminobenzoic acid (PABA)-type UV filters. The effects of various factors on the removal of Et-PABA using the UV/PDS process were investigated, and the degradation mechanisms of Et-PABA were explored. The results showed that the UV/PDS process can effectively remove 98.7% of Et-PABA within 30 min under the conditions: UV intensity of 0.92 mW·cm−2, an initial concentration of Et-PABA of 0.05 mM, and a PDS concentration of 2 mM. The removal rate of Et-PABA increased with the increase in PDS dosage within the experimental range, whereas humic acid (HA) had an inhibitory effect on Et-PABA removal. Six intermediates were identified based on HPLC–MS and degradation pathways were then proposed. It can be foreseen that the UV/PDS oxidation process has broad application prospects in water treatment.
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Research context
OpenAlex topics: Advanced oxidation water treatment · Advanced Photocatalysis Techniques · Water Treatment and Disinfection
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Nanhu College, Jiaxing University, Jiaxing 314001, China
College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China
Funding
National Natural Science Foundation of China · Department of Education of Zhejiang Province · Zhejiang University Student Research Innovation Team Funding Project · Student Research Training Program of Jiaxing University · Key Project of Nanhu college of Jiaxing University
References (54)
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