Diclofenac Toxicity Abatement in Wastewater with Solar Disinfection: A Study in the Rural Area of Brazil’s Central−West Region

Domestic wastewater has been targeted for the presence of emerging contaminants such as antibiotics, of which diclofenac is one of the most frequently detected. Many studies have focused on the removal of these emerging pollutants. However, the legislation has focused on toxicity monitoring. In sear...

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Bibliographic Details
Published in:Water (Basel) 2021-04, Vol.13 (8), p.1043
Main Authors: dos Santos, Nathália Sanches, Marquiza, Laura Fernanda, Calheiros, Cristina Sousa Coutinho, Cavalheri, Priscila Sabioni, Machado, Beatriz Santos, Cavazzana, Guilherme Henrique, Filho, Fernando Jorge Correa Magalhães
Format: Article
Language:English
Subjects:
Agricultural wastes
Antibiotics
Artemia
Bioindicators
Chemical oxygen demand
Coliforms
Contaminants
Diclofenac
Disinfection
Domestic wastewater
Effluents
Environmental impact
Escherichia coli
Exposure
Indicator organisms
Infection control
Legislation
Nonsteroidal anti-inflammatory drugs
Performance evaluation
Phytotoxicity
Pollutant removal
Pollutants
Pollution monitoring
Polyethylene terephthalate
Potassium
Radiation
Rural areas
Solar radiation
Toxicity
Wastewater
Wastewater treatment
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Summary:Domestic wastewater has been targeted for the presence of emerging contaminants such as antibiotics, of which diclofenac is one of the most frequently detected. Many studies have focused on the removal of these emerging pollutants. However, the legislation has focused on toxicity monitoring. In search of simplified solutions for rural areas, and to guarantee the safe reuse of effluent in agriculture, this study evaluated the efficiency of a decentralized solar disinfection (SODIS) system regarding the reduction of ecotoxicity, phytotoxicity, and pathogens in domestic wastewater after adding diclofenac potassium. For this purpose, the bioindicators Artemia sp., Allium cepa L. and Lactuca sativa were used, after 1, 2, and 3 h of exposure to solar radiation. After 3 h of exposure to solar radiation, toxicity was reduced and root growth inhibition was noted, which indicates low effluent toxicity after treatment by the SODIS system. It was achieved a reduction of 3 and 2 log units in the concentration of total coliforms and Escherichia coli, respectively.
ISSN:2073-4441
2073-4441
DOI:10.3390/w13081043