Programa de Pós-Graduação em Geociências (Geoquímica), Instituto de Química, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil..
Mar Pollut Bull. 2017 May 15;118(1-2):368-375. doi: 10.1016/j.marpolbul.2017.03.016. Epub 2017 Mar 16.
Guanabara Bay is characterized by predominant eutrophication and anoxic sediments with a mixture of pollutants. The risk prognosis associated with the dumping of its dredged sediments into the open ocean was addressed by our algorithm. Our algorithm could prioritize areas, characterize major processes related to dredging, measure the potential risk of sediments, and predict the effects of sediment mixing. The estimated risk of dredged sediment was >10-fold than that of ocean sediments. Among metals, mercury represented 50-90% of the total risk. The transfer of dredged material into the ocean or internal dumping in the bay requires a 1:10 dilution to mitigate the risk and bring the risk levels close to that in the EPA criteria, below which there is less likelihood of adverse effects to the biota, and a 1:100 dilution to maintain the original characteristics of the ocean disposal control area. Our algorithm indicator can be used in the design of both aquatic and continental disposal of dredged materials and their management.
瓜纳巴拉湾以高度富营养化和缺氧沉积物为特征，其中混合了各种污染物。我们的算法解决了将其疏浚沉积物倾倒入公海的风险预测问题。该算法可以对区域进行优先级排序，描述与疏浚相关的主要过程，测量沉积物的潜在风险，并预测沉积物混合的影响。估算的疏浚沉积物风险是海洋沉积物的 10 倍以上。在金属中，汞占总风险的 50-90%。将疏浚材料转移到海洋或在海湾内内部倾倒是降低风险的必要措施，需要进行 1:10 的稀释以将风险水平降低到接近环境保护署标准，在该标准以下，生物群受到不利影响的可能性较小，而进行 1:100 的稀释则可以维持海洋处置控制区的原始特征。我们的算法指标可用于设计疏浚物的水生和大陆处置及其管理。
