Interactions of chlorine with tropical aquatic fulvic acids and formation of intermediates observed by fluorescence spectroscopy

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCarvalho, Eduarda R.
dc.creatorMartin-Neto, Ladislau
dc.creatorMilori, Débora M. B. P.
dc.creatorRocha, Julio C.
dc.creatorRosa, André H.
dc.date2014-05-27T11:21:08Z
dc.date2016-10-25T18:19:49Z
dc.date2014-05-27T11:21:08Z
dc.date2016-10-25T18:19:49Z
dc.date2004-08-30
dc.date.accessioned2017-04-06T01:10:04Z
dc.date.available2017-04-06T01:10:04Z
dc.identifierJournal of the Brazilian Chemical Society, v. 15, n. 3, p. 421-426, 2004.
dc.identifier0103-5053
dc.identifierhttp://hdl.handle.net/11449/67836
dc.identifierhttp://acervodigital.unesp.br/handle/11449/67836
dc.identifier10.1590/S0103-50532004000300013
dc.identifierS0103-50532004000300013
dc.identifierWOS:000221883800012
dc.identifier2-s2.0-4143104727.pdf
dc.identifier2-s2.0-4143104727
dc.identifier0000-0002-2042-018X
dc.identifierhttp://dx.doi.org/10.1590/S0103-50532004000300013
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/889244
dc.descriptionThe interactions of tropical aquatic fulvic acids (AFA) with chlorine and formation of trihalomethanes were characterized by fluorescence spectroscopy. The aquatic humic substances (AHS) were isolated from a dark-brown stream (located in a environmental protection area near Cubatão city in São Paulo State, Brazil) by means of the collector XAD 8 according the procedure recommended by the International Humic Substances Society. The photoluminescence measurements were made by using a Perkin Elmer spectrometer; AHS, aquatic humic acids (AHA) and AFA samples were assayed. The interactions of AFA and chlorine were characterized by using different reaction times (1, 24, 48, 72 and 168 h) and chlorine concentrations (2.5, 5.0, 10.0 and 20.0 mg L-1). The relative fluorescence intensity for AFA was significantly decreased with the increasing of chlorine concentration and reaction time. The reduction of fluorescence intensity in the region of longer wavelength was interpreted as an indicative of interaction between condensed aromatic groups of AFA and chlorine.
dc.languageeng
dc.relationJournal of the Brazilian Chemical Society
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectAquatic fulvic acids
dc.subjectAquatic humic substances
dc.subjectNatural waters
dc.subjectPhotoluminescence
dc.subjectTrihalomethanes
dc.subjectadsorbent
dc.subjectaromatic compound
dc.subjectchlorine
dc.subjectfulvic acid
dc.subjecttrihalomethane
dc.subjectassay
dc.subjectBrazil
dc.subjectchemical analysis
dc.subjectchemical interaction
dc.subjectcolor
dc.subjectconcentration (parameters)
dc.subjectenvironmental protection
dc.subjectfluorescence
dc.subjectfluorescence spectroscopy
dc.subjecthumic substance
dc.subjectisolation procedure
dc.subjectmeasurement
dc.subjectobservation
dc.subjectphotoluminescence
dc.subjectpolymerization
dc.subjectreaction time
dc.subjectspectrometer
dc.subjectsynthesis
dc.titleInteractions of chlorine with tropical aquatic fulvic acids and formation of intermediates observed by fluorescence spectroscopy
dc.typeOtro


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