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https://hdl.handle.net/1822/86389
Título: | Realism-based assessment of the efficacy of potassium peroxymonosulphate on Stenotrophomonas maltophilia biofilm control |
Autor(es): | Oliveira, Isabel M. Gomes, Inês B. Moniz, Tânia Simões, Lúcia Chaves Rangel, Maria Simões, Manuel |
Palavras-chave: | Biofilm Chemical stability Disinfection Drinking water Pentapotassium bis(peroxymonosulphate) bis(sulphate (OXONE) Stenotrophomonas maltophilia |
Data: | 15-Out-2023 |
Editora: | Elsevier 1 |
Revista: | Journal of Hazardous Materials |
Citação: | Oliveira, Isabel M.; Gomes, Inês B.; Moniz, Tânia; Simões, Lúcia C.; Rangel, Maria; Simões, Manuel, Realism-based assessment of the efficacy of potassium peroxymonosulphate on Stenotrophomonas maltophilia biofilm control. Journal of Hazardous Materials, 460(132348), 2023 |
Resumo(s): | The potential of pentapotassium bis(peroxymonosulphate) bis(sulphate) (OXONE) to control biofilms in drinking water distribution systems (DWDS) was evaluated and compared to chlorine disinfection. Mature biofilms of drinking water (DW)-isolated Stenotrophomonas maltophilia were formed using a simulated DWDS with a rotating cylinder reactor (RCR). After 30 min of exposure, OXONE at 10 × minimum bactericidal concentration (MBC) caused a significant 4 log reduction of biofilm culturability in comparison to the unexposed biofilms and a decrease in the number of non-damaged cells below the detection limit (4.8 log cells/cm2). The effects of free chlorine were restricted to approximately 1 log reduction in both biofilm culturability and non-damaged cells. OXONE in synthetic tap water (STW) at 25 ºC was more stable over 40 days than free chlorine in the same conditions. OXONE solution exhibited a disinfectant decrease of about 10% of the initial concentration during the first 9 days, and after this time the values remained stable. Whereas possible reaction of chlorine with inorganic and organic substances in STW contributed to free chlorine depletion of approximately 48% of the initial concentration. Electron paramagnetic resonance (EPR) spectroscopy studies confirmed the presence of singlet oxygen and other free radicals during S. maltophilia disinfection with OXONE. Overall, OXONE constitutes a relevant alternative to conventional DW disinfection for effective biofilm control in DWDS. |
Tipo: | Artigo |
Descrição: | Available online 19 August 2023 |
URI: | https://hdl.handle.net/1822/86389 |
DOI: | 10.1016/j.jhazmat.2023.132348 |
ISSN: | 0304-3894 |
e-ISSN: | 1873-3336 |
Versão da editora: | http://www.journals.elsevier.com/journal-of-hazardous-materials/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_56388_1.pdf | 2,04 MB | Adobe PDF | Ver/Abrir |