Application of UV-activated persulfate and peroxymonosulfate processes for the degradation of 1,2,3-trichlorobenzene in different water matrices
| Autor: | Jasmina Agbaba, Tajana Đurkić, Malcolm Watson, Jelena Molnar Jazić, Miljana Prica, Bojan Bašić, Snežana Maletić, Aleksandra Tubić |
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| Rok vydání: | 2020 |
| Předmět: |
Ultraviolet Rays
Health Toxicology and Mutagenesis Trichlorobenzene 010501 environmental sciences Chlorobenzenes 01 natural sciences Activated persulfate Water Purification medicine Environmental Chemistry Ecotoxicology 0105 earth and related environmental sciences Pollutant Sulfates Chemistry Water Hydrogen Peroxide General Medicine Pesticide Persulfate Pollution Peroxides Environmental chemistry Degradation (geology) Water treatment Oxidation-Reduction Water Pollutants Chemical medicine.drug |
| Zdroj: | Environmental Science and Pollution Research. 28:59165-59179 |
| ISSN: | 1614-7499 0944-1344 |
| Popis: | The presence of a large number of micropollutants in the environment, including priority and emerging substances, poses a significant risk to surface and groundwater quality. Among them, trichlorobenzenes are widely used in the syntheses of dyes, pesticides, solvents, and other chemicals and have been identified as priority pollutants by the European Water Framework Directive. The main goal of this study was to investigate the behavior of 1,2,3-trichlorobenzene (TCB) during the sulfate radical–based advanced oxidation processes (SR-AOPs) involving UV activation of persulfate or peroxymonosulfate (UV/S2O82− and UV/HSO5− processes). For this purpose, TCB was subjected to SR-AOPs in synthetic water matrices containing humic acids or hydrogencarbonate and natural water samples and a comparative evaluation of the degradation process was made. The toxicity of the oxidation by-products was also assessed. The evaluation of TCB degradation kinetics results using principal component analysis indicates that the efficacy of the SR-AOPs was highly dependent on the pH, initial oxidant concentration, UV fluence, and matrix characteristics. In natural waters, TCB degradation by the UV/S2O82− process proved to be most effective in acidic conditions (pH 5), while the UV/HSO5− process showed the highest efficacy in basic conditions (pH 9.5), achieving a maximum TCB degradations of 97–99%. The obtained results indicate that UV/S2O82− and UV/HSO5− as new generation oxidation processes have significant potential for TCB removal from water and result in only minor toxicity after treatment (14–23% of Vibrio fischeri bioluminescence inhibition). |
| Databáze: | OpenAIRE |
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