Occurrence and partitioning of antifouling booster biocides in sediments and porewaters from Brazilian Northeast.
Environ Pollut
; 255(Pt 1): 112988, 2019 Dec.
Article
em En
| MEDLINE
| ID: mdl-31541816
ABSTRACT
Fouling organisms attach and grow on submerged surfaces causing several economic losses. Thus, biocides have been introduced in antifouling paints in order to avoid this phenomenon, but their widespread use became a global problem, mainly in ports, leisure and fishing boat harbors, since these substances can be highly toxic to non-target organisms. The occurrence and environmental behavior of antifouling biocides are especially unknown in some peculiar regions, such as Amazon areas. Thus, the aim of this work was to evaluate, for the first time, levels and the partitioning behavior of the antifouling organic biocides irgarol, diuron and also stable degradation products of dichlofluanid and diuron (DMSA and DCPMU, respectively) in sediments and porewaters from a high boat traffic area located in the Northeast of Brazil, a pre-Amazon region. Our results showed high concentrations of irgarol (<1.0-89.7⯵gâ¯kg-1) and diuron (<5.0-55.2⯵gâ¯kg-1) in sediments. In porewater, DCPMU (<0.03-0.67⯵gâ¯L-1) and DMSA (<0.008-0.263⯵gâ¯L-1) were the mainly substances detected. High Kd and Koc obtained for both irgarol and diuron showed a partitioning preference in the solid phase. This work represents one of the few registers of contamination by antifouling substances in Amazonian areas, despite their environmental relevance.
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MEDLINE
Assunto principal:
Água do Mar
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Poluentes Químicos da Água
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Monitoramento Ambiental
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Sedimentos Geológicos
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Desinfetantes
País como assunto:
America do sul
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Brasil
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article