Open AccessWSOC and Its Relationship with BC, Levoglucosan and Transition Metals in the PM2.5 of an Urban Area in the Amazon
Author(s) -
Karenn Silveira Fernandes,
Erickson dos Santos,
Carla Estefani Batista,
Igor O. Ribeiro,
Victor Pontes Piracelli,
Maria Cristina Solci,
Sérgio Duvoisin,
Scot T. Martin,
Rodrigo O. M. A. de Souza,
Cristine M. D. Machado
Publication year - 2022
Publication title -
journal of the brazilian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.337
H-Index - 70
eISSN - 1678-4790
pISSN - 0103-5053
DOI - 10.21577/0103-5053.20220011
Subject(s) - levoglucosan , total organic carbon , aerosol , amazon rainforest , environmental chemistry , biomass burning , carbon black , chemistry , carbon fibers , mass concentration (chemistry) , transition metal , materials science , organic chemistry , ecology , natural rubber , composite number , composite material , biology , catalysis
Water-soluble organic carbon (WSOC) makes up a large mass fraction of the organic carbon in the aerosol and can influence important cloud processes in the atmosphere. The capacity of WSOC to form metallic complexes with transition metals is well known; however, its influence on the aerosol of urban areas in the Amazon region is not very well known. In this study, we investigated the relationship between WSOC, black carbon (BC), levoglucosan (LEV) and transition metals (Fe, Cu and Mn) present in the PM2.5 (particles with a diameter smaller than 2.5 µm) of an urban environment during the dry season in the central Amazon. Oxalic acid (C2) was used to identify the influence of transition metals on WSOC. The mean mass concentration value of the PM2.5 was 14.72 μg m-3 (2.11-31.68 μg m-3). The WSOC made up 58.34% of the PM2.5 mass, followed by BC (20.28%), and LEV (2.62%). The WSOC showed significant correlation with the transition metals analyzed (> 0.56), especially Mn with C2 (linear coefficient (R2 ) = 0.74). A multiple linear regression with WSOC, BC and LEV showed a strong linear correlation between them (R2 = 0.86), indicating the influence of biomass burning and vehicle traffic on the organic aerosol.