Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/15311
Título: Effects of gamma radiation on cork wastewater: Antioxidant activity and toxicity
Autor: Madureira, Joana
Pimenta, Andreia I.
Popescu, Larisa
Besleaga, Alexandra
Dias, Maria Inês
Santos, Pedro M.P.
Melo, Rita
Ferreira, Isabel C.F.R.
Cabo Verde, Sandra
Margaça, Fernanda M.A.
Palavras-chave: Antioxidant activity
Cork boiling water
Cytotoxicity
Ecotoxicity
Gamma radiation
Wastewater treatment
Data: 2017
Citação: Madureira, Joana; Pimenta, Andreia I.; Popescu, Larisa; Besleaga, Alexandra; Dias, Maria Inês; Santos, Pedro M.P.; Melo, Rita; Ferreira, Isabel C.F.R.; Cabo Verde, Sandra; Margaça, Fernanda M.A. (2017) - Effects of gamma radiation on cork wastewater: Antioxidant activity and toxicity. Chemosphere. ISSN 0045-6535. 169, p. 139-145
Resumo: A comprehensive assessment of the toxicity and antioxidant activity of cork boiling wastewater and the effects of gamma radiation on these parameters was performed. Antioxidant activity was evaluated using different methodologies as DPPH radical scavenging activity, reducing power and inhibition of ß-carotene bleaching. The results have shown that gamma radiation can induce an increase on the antioxidant activity of cork boiling wastewater. Toxicity tests were performed to access the potential added value of the irradiated wastewaters and/or minimization of the impact for discharge in the environment. Two different methods for toxicity evaluation were followed, bacterial growth inhibition test and cytotoxicity assay, in order to predict the behavior of different cells (prokaryotic and eukaryotic) in the presence of cork wastewater. Non-treated cork boiling wastewater seemed to be non-toxic for prokaryotic cells (Pseudomonas fluorescens and Bacillus subtilis) but toxic for eukaryotic cells (A549 human cells and RAW264.7 mouse cells). The gamma radiation treatment at doses of 100 kGy appeared to increase the toxicity of cork compounds for all tested cells, which could be related to a toxic effect of radiolytic products of cork compounds in the wastewaters.
Peer review: yes
URI: http://hdl.handle.net/10198/15311
DOI: 10.1016/j.chemosphere.2016.11.064
ISSN: 0045-6535
Aparece nas colecções:CIMO - Artigos em Revistas Indexados à WoS/Scopus

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