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Interaction of Cr (VI) with Green Microalgae Growth: A comparative study

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dc.contributor.authorDinis, Maria Alzira Pimenta
dc.contributor.authorVilar, Vítor
dc.contributor.authorMonteiro, Álvaro
dc.contributor.authorBoaventura, Rui
dc.date.accessioned2019-03-28T14:46:18Z
dc.date.available2019-03-28T14:46:18Z
dc.date.issued2009
dc.descriptionAccording to Nova’s Policy for Self-Archiving, self-archiving of proofed chapters can be posted on the author’s website free of charge six months after publication. For Subject and Institutional Repositories, proofed chapters can be uploaded 12 months after publication. For more information, please see: https://novapublishers.com/open-access/pt_PT
dc.description.abstractMicroalgae Chlorella fusca ACOI 621, Chlorella vulgaris ACOI 879, Scenedesmus acutus ACOI 538 and Scenedesmus obliquus ACOI 550, all native from Portugal, were characterized in terms of specific growth rate. The effect of pH and the presence of Cr(VI) in concentrations up to 25 mg l-1 (50 mg l-1 for Chlorella fusca) has been evaluated. The logistic equation of population growth adequately describes the cellular growth. Experiments at pH = 6.5 and temperature around 24.5 ºC, in the absence of Cr(VI), led to specific growth rates (m) of 0.0370, 0.0284, 0.0359 and 0.0162 h-1 and maximum biomass concentrations (K) of 403.3, 369.2, 542.9 and 604.1 mg l-1 for C. fusca, C. vulgaris, S. acutus and S. obliquus, respectively. Experiments carried out with the same algae at approximately 21 ºC, also in the absence of Cr(VI), gave m values of 0.0241, 0.0357, 0.0272 and 0.0289 h-1 and K values of 292.6, 169.9, 263.1 and 327.8 mg l-1 for initial pH = 6.5 and m values of 0.0115, 0.0177, 0.0137 and 0.0158 h-1 and K values of 35.9, 3.0, 32.8 and 54.7 mg l-1 for initial pH = 7.9. Higher pH results in a significantly lower growth rate and C. vulgaris seems to be the less resistant microalgae to changes in the environmental conditions. Looking simultaneously at m and K values, the best performance in terms of growth kinetics was obtained for S. acutus and C. fusca. Growth inhibition is visible for Cr(VI) ³ 5 mg l-1 but concentrations up to 1 mg l-1 seem not to seriously affect algal growth, even increasing the C. fusca specific growth rate. For Cr(VI) < 1 mg l-1, m varies between 0.08 and 0.17 h-1, depending on the algal species. The growth of C. vulgaris is severely inhibited by Cr(VI) = 5 mg l-1. The production of metabolites is small compared with biomass production, for all Cr(VI) concentrations. The organic carbon content of algae is about 40%-50% (dry basis), except for S. obliquus (around 30%). The biomass of C. fusca and S. acutus presents the greatest sedimentation rates. The presence of high Cr(VI) concentrations negatively affects the sedimentation.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDinis, M. A. P., V. J. P. Vilar, Á. A. M. G. Monteiro and R. A. R. Boaventura (2009). Interaction of Cr (VI) with Green Microalgae Growth: A Comparative Study. Biochemical Engineering. F. E. Dumont and J. A. Sacco. New York, Nova Science Publishers 257-274pt_PT
dc.identifier.isbn978-1-60741-257-1
dc.identifier.urihttp://hdl.handle.net/10284/7474
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherNova Science Publisherspt_PT
dc.relation.publisherversionhttp://www.novapublishers.org/catalog/product_info.php?cPath=23_29&products_id=9656
dc.subjectMicroalgaept_PT
dc.subjectChlorella fuscapt_PT
dc.subjectChlorella vulgarispt_PT
dc.subjectScenedesmus acutuspt_PT
dc.subjectScenedesmus obliquuspt_PT
dc.subjectGrowth kineticspt_PT
dc.subjectChromium (VI)pt_PT
dc.titleInteraction of Cr (VI) with Green Microalgae Growth: A comparative studypt_PT
dc.typebook part
dspace.entity.typePublication
oaire.citation.conferencePlaceNew Yorkpt_PT
oaire.citation.endPage274pt_PT
oaire.citation.startPage257pt_PT
oaire.citation.titleBiochemical Engineeringpt_PT
person.familyNameDinis
person.familyNameVilar
person.familyNameMonteiro
person.familyNameBoaventura
person.givenNameMaria Alzira Pimenta
person.givenNameVítor
person.givenNameÁlvaro
person.givenNameRui
person.identifier493603
person.identifier.ciencia-id4710-147D-FDAF
person.identifier.ciencia-id951A-E736-A7A3
person.identifier.ciencia-id651D-4B9A-058F
person.identifier.ciencia-id3510-8B5A-1BF5
person.identifier.orcid0000-0002-2198-6740
person.identifier.orcid0000-0003-0943-2144
person.identifier.orcid0000-0001-8839-5956
person.identifier.orcid0000-0002-3000-5748
person.identifier.ridF-3309-2011
person.identifier.ridK-1786-2014
person.identifier.scopus-author-id55539804000
person.identifier.scopus-author-id10540195800
person.identifier.scopus-author-id7102146030
person.identifier.scopus-author-id6701822293
rcaap.rightsopenAccesspt_PT
rcaap.typebookPartpt_PT
relation.isAuthorOfPublication1e85592a-e8e2-4aea-bd8e-1007c94388c0
relation.isAuthorOfPublicationd802f943-aa57-4a01-bf2e-021c91974b28
relation.isAuthorOfPublicationa20123a2-3855-4cff-89ef-b71da0b810b9
relation.isAuthorOfPublication576b5379-c933-42ea-ad50-2d549632564f
relation.isAuthorOfPublication.latestForDiscovery1e85592a-e8e2-4aea-bd8e-1007c94388c0

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