Degradation of UV Filter Ethyl 4-Aminobenzoate (Et-PABA) Using a UV-Activated Persulfate Oxidation Process
| Autor: | Qiang Wu, Chihao Lin, Hui Liu, Lingfeng Zhang, Ping Sun, Ruirui Han, Zhicai Zhai, Yingsen Fang, Jiaqiang Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
UV filter
02 engineering and technology 010501 environmental sciences medicine.disease_cause lcsh:Technology 01 natural sciences Activated persulfate lcsh:Chemistry UV-activated medicine Humic acid General Materials Science persulfate lcsh:QH301-705.5 Instrumentation 0105 earth and related environmental sciences Fluid Flow and Transfer Processes chemistry.chemical_classification advanced oxidation processes (AOPs) lcsh:T Chemistry Process Chemistry and Technology General Engineering ethyl 4-aminobenzoate (Et-PABA) 021001 nanoscience & nanotechnology Persulfate lcsh:QC1-999 Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Degradation (geology) Water treatment Oxidation process lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:Physics Ultraviolet Nuclear chemistry |
| Zdroj: | Applied Sciences Volume 9 Issue 14 Applied Sciences, Vol 9, Iss 14, p 2873 (2019) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9142873 |
| Popis: | 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&minus 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&ndash MS and degradation pathways were then proposed. It can be foreseen that the UV/PDS oxidation process has broad application prospects in water treatment. |
| Databáze: | OpenAIRE |
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