Comparison of UVC-based advanced oxidation processes in the mineralization of bisphenol A: Identification of oxidation by products and toxicity evaluation
| Autor: | Naihara Wachter, José M. Aquino, Isaac Sánchez-Montes, Bianca Ferreira da Silva |
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| Přispěvatelé: | Universidade Federal de São Carlos (UFSCar), Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Bisphenol A
General Chemical Engineering Dichloroacetic acid 02 engineering and technology 010402 general chemistry 01 natural sciences Industrial and Manufacturing Engineering Hydroxylation chemistry.chemical_compound Plasticizers Synthetic organic compounds Environmental Chemistry biology Hydroxylation reactions Uvc irradiation Advanced oxidation processes General Chemistry Mineralization (soil science) Contamination 021001 nanoscience & nanotechnology biology.organism_classification 0104 chemical sciences UVC irradiation chemistry Environmental chemistry Toxicity Synergistic e ffect Synergistic effect Artemia salina 0210 nano-technology |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2020-12-10T20:06:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-04-15 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Water contamination by contaminants of emerging concern (CEC) represents a major challenge to our society regarding the need to assure a high quality drinking water to prevent humans from developing health problems. Thus, the performance of three different advanced oxidation processes (AOP: UVC/HOCl, UVC/S2O82-, and UVC/H2O2) based on the homolysis of oxidants were investigated for the oxidation and mineralization of bisphenol A (BPA) containing solutions as well as assessment of biotoxicity and identification of oxidation byproducts. In all AOP, UVC irradiation led to a significant improvement for the oxidation and mineralization of BPA due to the production of HO center dot/SO4 center dot- species. UVC/HOCl method was able to achieve high rates of conversion of BPA and its oxidation by-products to CO2. All detected oxidation by-products resulted from hydroxylation reactions. Considering the short chain carboxylic acids, mainly produced after opening the aromatic ring, high concentrations appeared mainly during the first two hours of treatment for the UVC/HOCl method with a complete elimination within 6 h of treatment, including the dichloroacetic acid. Biotoxicity assays using Artemia salina crustacean showed that the mortality was ceased after 4 h of treatment using the UVC/HOCl and UVC/S2O82- processes. In contrast, a low mortality decrease was observed when using the UVC/H2O2 process, probably due to the accumulation of toxic intermediates. In all scenarios, toxicity of the BPA compound and its oxidation by-products seem to be responsible for the distinct decays of mortality, as confirmed on the ECOSAR software. Finally, the UVC/HOCl method is an interesting option to eliminate CEC for removing levels attained and energy consumption. Univ Fed Sao Carlos, Dept Quim, CP 676, BR-13560970 Sao Carlos, SP, Brazil Univ Estadual Paulista, Dept Quim Analit, Inst Quim Araraquara, BR-14800900 Araraquara, SP, Brazil Univ Estadual Paulista, Dept Quim Analit, Inst Quim Araraquara, BR-14800900 Araraquara, SP, Brazil CNPq: 142350/2016-8 CNPq: 141934/2014-0 CAPES: 001 FAPESP: 2008/10449-7 FAPESP: 2019/07943-4 |
| Databáze: | OpenAIRE |
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