Hydrogen peroxide in the rainwater of Sao Paulo megacity: Measurements and controlling factors

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dc.contributor.authorGoncalves C.
dc.contributor.authorDos Santos M.A.
dc.contributor.authorFornaroc A.
dc.contributor.authorPedrotti J.J.
dc.date.accessioned2024-03-13T01:33:10Z
dc.date.available2024-03-13T01:33:10Z
dc.date.issued2010
dc.description.abstractMeasurements of H2O2, major ions and meteorological parameters were made in rain events occurred in downtown Sao Paulo City, Brazil between July 2001 and January 2006. The H2O2 concentration ranged from 0.5 to 78 μmol L-1 with an average of 14.5 μmol L -1. The SO42- and HCOO- concentrations mean were of 13.5 and 9.62 μmol L-1, respectively. The H 2O2 concentrations showed a positive and significant correlation with HCOO- (r = 0.70, n = 129, p < 0.0001) suggesting that the production of H2O2 in aqueous phase by consumption of formaldehyde by reaction with OH• radical is a factor which may control the H2O2 levels in the rainwater samples. Estimation of rate of wet deposition of H2O2 shows that nearly 70% of hydrogen peroxide is annually removed from the atmosphere by wet deposition in spring and summer. Sequential rainstorm analyses indicated that lightning activity and rainfall rate can influence the H2O 2 contents in rainwater in this area. © 2010 Sociedade Brasileira de Química.
dc.description.firstpage331
dc.description.issuenumber2
dc.description.lastpage339
dc.description.volume21
dc.identifier.doi10.1590/S0103-50532010000200020
dc.identifier.issn1678-4790
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/37275
dc.relation.ispartofJournal of the Brazilian Chemical Society
dc.rightsAcesso Aberto
dc.subject.otherlanguageAir pollution
dc.subject.otherlanguageHydrogen peroxide
dc.subject.otherlanguageMegacity
dc.subject.otherlanguageRainwater
dc.titleHydrogen peroxide in the rainwater of Sao Paulo megacity: Measurements and controlling factors
dc.typeArtigo
local.scopus.citations34
local.scopus.eid2-s2.0-77951861721
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77951861721&origin=inward
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