Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 28, Issue 15, Pages 19485-19496Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-12010-5
Keywords
Amazon coastal area; Pyrogenic compounds; Alkylated PAHs; Environmental evaluation
Categories
Funding
- PIATAM MAR Project (Petrobras/UFPA/FADESP) [1728, 1731]
- Brazilian National Council for Scientific and Technological Development (CNPq) [477418/2006-6]
- Brazilian International Education Institute [B/2006/02/BDP/02]
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PAH concentrations in surface sediment samples from three cities along the Brazilian Amazon coast were generally low, reflecting baseline levels for the estuarine system; Different cities showed variations in PAH sources and composition, linked to local industrial emissions and wastewater treatment practices.
Polycyclic aromatic hydrocarbons (PAHs) were measured in 32 surface sediment samples collected around three cities (Barcarena, Belem, and Santana) located on the coast of the Brazilian Amazon. The concentration of total PAHs ranged from lower than detection limit to 33,101 ng g(-1) in a sample from Barcarena and was related to a large aluminum industrial complex and port activities. In Belem, which is the most populated area in the Amazon region, PAHs were probably derived from untreated sewage discharge and inputs from a large municipal landfill. Pyrogenic PAHs were predominant in both cities, with a smaller contribution of petrogenic PAHs. Low alkylated PAH levels may be associated with small boats and ship traffic. Santana had low total PAH concentrations, with a predominance of unusual alkylated PAHs, probably related to diagenetic transformations of organic matter in the sediment. In general, PAH concentrations in the samples were low and may reflect baseline levels for this Amazon estuarine system.
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