Programa de Pós-Graduação em Sistemas Costeiros e Oceânicos (PGSISCO), Universidade Federal do Paraná, Caixa Postal 61, 83255-976 Pontal do Paraná, PR, Brazil.
Centro de Estudos do Mar, Universidade Federal do Paraná, Caixa Postal 61, 83255-976 Pontal do Paraná, PR, Brazil; Instituto Oceanográfico, Universidade de São Paulo, Praça do Oceanográfico, 191, 05508-120 São Paulo, SP, Brazil.
Mar Pollut Bull. 2018 Aug;133:436-441. doi: 10.1016/j.marpolbul.2018.05.052. Epub 2018 Jun 19.
The occurrence, distribution, and the total mass of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were studied in surficial sediments of the Paranaguá Estuarine System (PES), a subtropical estuary in Southern Atlantic. Altogether, concentrations and inventories of contaminants ranged from <0.06 to 4.78 ng g and < 0.13 to 10.47 ng cm, respectively. OCPs presented the higher total mass (10.85 kg) and a decreasing trend from the inner estuary towards the adjoining shallow shelf. The occurrence of PCBs was restricted to sites nearby urban and industrial areas, which accumulated ~80% of the total mass of PCBs. Although the level of contamination is low, the results refer to recent years, which mean that the actual values could be greater if sediments from periods of higher usage were analyzed. This study provides the first estimates of POPs (persistent organic pollutants) total mass in the PES, contributing to data for the Southern American inventories.
本研究调查了南大西洋亚热带河口——帕拉纳瓜河口系统（PES）表层沉积物中多氯联苯（PCBs）和有机氯农药（OCPs）的分布和总量。污染物的浓度和含量范围分别为<0.06 至 4.78ng/g 和<0.13 至 10.47ng/cm。OCPs 的总量（10.85kg）较高，且从河口内部向毗邻的浅海架呈递减趋势。PCBs 的存在仅限于城市和工业区附近的地点，这些地点积累了~80%的 PCBs 总量。尽管污染水平较低，但这些结果是近年来的数据，这意味着如果分析使用高峰期的沉积物，实际值可能会更高。本研究首次提供了 PES 中持久性有机污染物（POPs）总量的估计值，为南美的清查数据做出了贡献。
