Publicação
Relevance of iron content for Escherichia coli growth in drinking water
| dc.contributor.author | Afonso, Andrea Luísa Fernandes | |
| dc.contributor.author | Pires, Bruno | |
| dc.contributor.author | Gonçalves, Cátia | |
| dc.contributor.author | Teixeira, Cristina | |
| dc.contributor.author | Nogueira, António José M. | |
| dc.date.accessioned | 2023-02-24T09:33:02Z | |
| dc.date.available | 2023-02-24T09:33:02Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | The chemical and microbiological quality of drinking-water should be considered within overall public health priorities. The chemical contaminants of drinking-water may have different sources, including agricultural activities (e.g. nitrate), geological origin, and as a result of corrosion reactions in the distribution systems (e.g. heavy metals) [1]. In public water system of drinking water, the presence of iron (Fe) could be related to increased bacterial activity including Escherichia coli growth [2,3], an indicator of faecal contamination and the potential presence of pathogenic bacteria, protozoa or viruses [1]. On the other hand, phylogenetically different species of bacteria can promote the oxidation of ferrous iron [Fe(II)] coupled to nitrate (NO3 -) reduction, often referred to as nitrate-dependent iron oxidation [4]. Aim: This research evaluated the relation between the iron (μg/L) and nitrate (mg/L) concentration and the E. coli colony-forming units (CFUs) persistence in drinking water distribution systems. Methods: The samples of drinking water (n=464) were analyzed according the standardized protocols [5]. The proportion of samples with high number of E.coli CFUs (>80) were estimated according to the concentration of iron (<50 or >=50 μg/L) and nitrates (<1 or >=1 mg/L). By including only positive samples for E.coli (n=22), we estimated the Spearman’s correlation coefficients (rs) and the respective p-value (p < 0.05) between iron concentration, nitrate concentration and number of E. coli CFU. Results: There were higher proportion of >80 E.coli CFUs among samples with high iron concentration (p=0.049) while no significant differences were observed by nitrate concentration (p=0.059). When analyses were restricted to positive samples for E.coli (CFUs > 0) we observed a significant correlation between iron concentration and E. coli CFUs; rs=0.497 (p=0.019), while no correlation was observed between nitrate concentration and E. coli CFUs; rs=0.335 (p=0.126). Conclusion: The results emphasizes the iron role in the E. coli persistence in drinking water of public network, rising some concerns in the field of public health | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | Afonso, Andrea; Pires, Bruno; Gonçalves, Cátia; Teixeira, Cristina; Nogueira, António José M. (2021). Relevance of iron content for Escherichia coli growth in drinking water. In 7th Portuguese Young Chemists Meeting: Book of Abstracts. Bragança | pt_PT |
| dc.identifier.isbn | 978-989-8124-31-9 | |
| dc.identifier.uri | http://hdl.handle.net/10198/27164 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Sociedade Portuguesa de Química | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt_PT |
| dc.subject | E. coli | pt_PT |
| dc.subject | Research Subject Categories::TECHNOLOGY::Bioengineering | pt_PT |
| dc.title | Relevance of iron content for Escherichia coli growth in drinking water | pt_PT |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Bragança | pt_PT |
| oaire.citation.endPage | 102 | pt_PT |
| oaire.citation.startPage | 102 | pt_PT |
| oaire.citation.title | 7th Portuguese Young Chemists Meeting: Book of Abstracts | pt_PT |
| person.familyName | Afonso | |
| person.familyName | Teixeira | |
| person.familyName | Nogueira | |
| person.givenName | Andrea Luísa Fernandes | |
| person.givenName | Cristina | |
| person.givenName | António José M. | |
| person.identifier.ciencia-id | 9C1D-41E7-9BBF | |
| person.identifier.ciencia-id | 6E12-F2A0-568F | |
| person.identifier.ciencia-id | 8A11-794E-36BD | |
| person.identifier.orcid | 0000-0002-8858-1617 | |
| person.identifier.orcid | 0000-0001-5194-5141 | |
| person.identifier.orcid | 0000-0001-8912-7355 | |
| person.identifier.rid | O-2296-2013 | |
| person.identifier.scopus-author-id | 36766901000 | |
| person.identifier.scopus-author-id | 55207402700 | |
| person.identifier.scopus-author-id | 55865568268 | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | conferenceObject | pt_PT |
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