Repository logo
 
Publication

Chemical quality of drinking-water in a Northeast Region of Portugal

2020Conference object Open access
Simple item page
dc.contributor.authorAfonso, Andrea Luísa Fernandes
dc.contributor.authorPires, Bruno
dc.contributor.authorAfonso, Eugénia
dc.contributor.authorTeixeira, Cristina
dc.contributor.authorNogueira, António José M.
dc.date.accessioned2021-03-30T09:25:31Z
dc.date.available2021-03-30T09:25:31Z
dc.date.issued2020
dc.description.abstractThe chemical and microbiological quality of drinking-water should be considered within overall public health priorities [1]. A poor quality of drinking-water, due to insufficient disinfection or by human contamination, can be a vehicle for transmitting diseases to consumers. Thus, the quality of both raw water (surface water and groundwater) and the drinking-water has a strong impact on the public health. Among the contaminants, nitrates (NO3-) and faecal indicators (such as thermotolerant coliforms, Escherichia coli and enterococci) represents a major concern because these factors have been associated with adverse health outcomes [1,2]. This study analysed contaminants in drinking-water samples (n=361), including surface water and groundwater in the district of Bragança (during the year 2019), according the standardized protocols [3]. We evaluated the relationship of NO3- concentration with microbial drinking-water parameters (heterotrophic plate count-HPC and faecal indicators), as well as, operational parameter used to assess the performance of a water-treatment process (chlorine residuals and pH) [1]. The nitrate concentration (3.38±5.79 mg/L) presented a significant relation with the presence of the fecal contaminant enterococci (p=0.011). There were significant differences (p<0.001) in regards to nitrate concentration between the water samples according to their provenience, such that groundwater presents higher concentration (mean varying from 4.51 to 6.48 mg/mL) than surface water (mean varying from 1.09 to 1.69 mg/mL). The results also showed that, beyond the presence of enterococci, HPC and coliform bacteria was associated with lower levels of residual chlorine (p= 0.008) and pH (p= 0.004), respectively. The results suggests the relevance of chemical evaluation of drinking-water and the linking to the microbiological contamination and the operational control of water-treatment process. Acknowledgements: We acknowledge to Unidade Local de Saúde do Nordeste [1] World Health Organization, in Developing Drinking-Water Quality Regulations and Standards, World Health Organization, Geneva, 2018. [2] Mary, H. Ward M. H.; Jones, R. R.; Brender, J. D.; Kok, T. M.; Weyer, P. J.; Nolan, B. T.; Villanueva, C. M.; Breda, S. G. Drinking Water Nitrate and Human Health: An Updated Review. International Journal of Environmental Research and Public Health 2018, 15, 1557. [3] Standard Methods for the Examination of Water and Wastewater. E.W. Rice, R.B. Baird, A.D. Eaton (23 Eds.), Washington DC, American Public Health Association, 2017.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAfonso, Andrea F. ; Pires, Bruno; Afonso, Eugénia; Teixeira, Cristina; Nogueira, António José M. (2020). Chemical quality of drinking-water in a Northeast Region of Portugal. In Livro de Resumos do Analítica 2020 – 10º Encontro da Divisão de Química Analítica. ISBN 978-989-8124-30-2pt_PT
dc.identifier.isbn978-989-8124-30-2
dc.identifier.urihttp://hdl.handle.net/10198/23513
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociedade Portuguesa de Químicapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectDrinking-waterpt_PT
dc.subjectChemical qualitypt_PT
dc.subjectchemical contaminantspt_PT
dc.subjectFaecal contaminatspt_PT
dc.titleChemical quality of drinking-water in a Northeast Region of Portugalpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceLisboa. Evento Virtual - Onlinept_PT
oaire.citation.titleAnalítica 2020 – 10º Encontro da Divisão de Química Analíticapt_PT
person.familyNameAfonso
person.familyNameTeixeira
person.familyNameNogueira
person.givenNameAndrea Luísa Fernandes
person.givenNameCristina
person.givenNameAntónio José M.
person.identifier.ciencia-id9C1D-41E7-9BBF
person.identifier.ciencia-id6E12-F2A0-568F
person.identifier.ciencia-id8A11-794E-36BD
person.identifier.orcid0000-0002-8858-1617
person.identifier.orcid0000-0001-5194-5141
person.identifier.orcid0000-0001-8912-7355
person.identifier.ridO-2296-2013
person.identifier.scopus-author-id36766901000
person.identifier.scopus-author-id55207402700
person.identifier.scopus-author-id55865568268
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublicationaf7d647c-f5a6-48f7-afcf-6307c3677b1d
relation.isAuthorOfPublication9037c83c-43c1-4714-ad3e-9f307dd1d89f
relation.isAuthorOfPublication648209a2-eec9-4bec-975a-32673e41b95c
relation.isAuthorOfPublication.latestForDiscovery9037c83c-43c1-4714-ad3e-9f307dd1d89f

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Chemical Quality of drinking-water in a Northeast Region of Portugal.pdf
Size:
303.92 KB
Format:
Adobe Portable Document Format
Download

Collections

ESSa - Resumos em Proceedings Não Indexados à WoS/Scopus