Summary of Abstract Submission

Abstract Submission No. IO50-03-0018PresentationOral

ORGANIC MICRO POLLUTANTS IN MARINE PLASTICS RESIN PELLETS FROM THE EIGHT URBAN BEACHES OF BRAZIL

Mahua Saha*1, Hideshige Takada2, Denis Abessa3, Gabriel Izar Mendes4

1 National Institute of Oceanography, Goa, India, India
2 Tokyo University of Agriculture and technology, Japan
3 3So Paulo State University, Brazil, Brazil
4 Instituto de Cincias do Mar - UNIFESP, Brazil, Brazil

ABSTRACT :

Plastic pellets are significant components of marine litter and can be found floating in the sea or stranded on beaches. However, current assessments of this issue lack standardization to allow comparisons of pellet pollution levels between different locations. Thus to understand the spatial variation in concentrations and compositions of organic micro pollutants in marine plastic debris and their sources, we analyzed plastic resin pellets (∼5 mm) from the eight beaches of Brazil. Polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), dichloro-diphenyl-trichloroethane and its metabolites (DDTs), hexachlorocyclohexanes (HCHs), and hopanes, in plastic resin pellets were analyzed. Concentrations of a sum of 13 PCBs were comparatively higher in all the beaches (1.51 3.59 g/g pellets). Significantly high DDE (2.27-8.89 g/g pellets), sum of 33 PAHs (0.17-11.9 g/g pellets) and DDT (0.89-23.3 g/g pellets) were found in most of the beaches. The overall alkyl PAHs to parents PAHs ratio [MP/P (0.22-2.85), MPy/Py (0.15-2.38), MC/C (0.23-2.28) and MPAHs/ PAHs (0.4-2.3)] showed the effect of petrogenic PAHs is more dominant, suggesting the probable sorption of PAHs from oil slicks. PCBs are most probably derived from legacy pollution. This study demonstrated that multiple sample locations, are necessary for monitoring country-scale pellet pollution.