Intermediates of Hydrogen Peroxide-Assisted Photooxidation of Salicylic Acid: Their Degradation Rates and Ecotoxicological Assessment DOI Open Access
Alicja Gackowska, Waldemar Studziński, Alexander Shyichuk

et al.

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(2), P. 697 - 697

Published: Jan. 15, 2025

Accelerated photooxidation of salicylic acid (SA) was performed using UV radiation and hydrogen peroxide. HPLC-MS analysis showed that the primary intermediates are 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic pyrocatechol, phenol. Deeper oxidation leads to low molecular weight aliphatic acids, such as maleic, fumaric, glyoxylic. The main carried out in same conditions. degradation SA its follows first-order reaction kinetics. In case irradiation alone, photodegradation is slightly faster (reaction rate constant 0.007 min−1) compared (0.0052 min−1). Other products degrade more slowly than SA. Hydrogen peroxide, concentrations 1.8–8.8 mM, accelerates intermediate products. An ecotoxicological evaluation EPI SuiteTM software. overall persistence (POV) long-range transport potential (LRTP) all transformation were assessed OECD POV LRTP screening tool. Salicylic have toxicity. Due their high solubility, these contaminants can travel considerable distances aquatic environment. phenol values 156–190 km. shorter (less 100 km).

Language: Английский

Intermediates of Hydrogen Peroxide-Assisted Photooxidation of Salicylic Acid: Their Degradation Rates and Ecotoxicological Assessment DOI Open Access
Alicja Gackowska, Waldemar Studziński, Alexander Shyichuk

et al.

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(2), P. 697 - 697

Published: Jan. 15, 2025

Accelerated photooxidation of salicylic acid (SA) was performed using UV radiation and hydrogen peroxide. HPLC-MS analysis showed that the primary intermediates are 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic pyrocatechol, phenol. Deeper oxidation leads to low molecular weight aliphatic acids, such as maleic, fumaric, glyoxylic. The main carried out in same conditions. degradation SA its follows first-order reaction kinetics. In case irradiation alone, photodegradation is slightly faster (reaction rate constant 0.007 min−1) compared (0.0052 min−1). Other products degrade more slowly than SA. Hydrogen peroxide, concentrations 1.8–8.8 mM, accelerates intermediate products. An ecotoxicological evaluation EPI SuiteTM software. overall persistence (POV) long-range transport potential (LRTP) all transformation were assessed OECD POV LRTP screening tool. Salicylic have toxicity. Due their high solubility, these contaminants can travel considerable distances aquatic environment. phenol values 156–190 km. shorter (less 100 km).

Language: Английский

Citations

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