Assessment of trace metal contamination and bioavailability in an Environmental Protection Area: Guaxindiba estuarine system (Guanabara Bay, Rio de Janeiro Brazil)

Uma avaliação sistemática sobre os efeitos de metais e metaloides, presentes em sedimentos, sobre comunidades de macroinvertebrados bentônicos em estuário subtropical no Brasil – sistema estuarino de Paranaguá

“…As análises dos teores de oxigênio dissolvido (OD) podem fornecer informações importantes a respeito da degradação da matéria orgânica, esclarecendo a prevalência de processos aeróbicos ou anaeróbicos (Dodds, 2006). Níveis de oxigênio dissolvido abaixo de 5mg/l apontam o início de estresse biológico e hipóxia (OD < 2,00 mg/l) o que é um indicativo de eutrofização, que podem ocasionar a migração de macroinvertebrados bentônicos até o desaparecimento de espécies marinhas (Fernandes et al, 2020;Yin et al, 2004).…”

Emerging Contaminants in Sediments as Markers of Anthropogenic Inputs in Santos Estuarine System: Analytical Method and Occurrence Data

“…In addition, estuaries are considered one of the most productive marine ecosystems in the world being highly vulnerable to contamination of water and sediments which generate several impacts on local biota. 1 Pharmaceuticals, pesticides, industrial chemicals, personal care products and other synthetic or naturally occurring chemicals, whose environmental occurrences are not routinely monitored, but show potential to reach the environment, and cause known or suspected ecological disruption or effects to human health, are known as emerging contaminants (ECs). A wide range of groups, as perfluoroalkyl compounds, plasticizers, microplastics, analgesics, antibiotics, hormones, anti-inflammatory, antidiabetic, and anticonvulsant drugs are included in such group.…”

“…Besides, investigation of sediments is important since they are natural repositories of substances present in the water, and sediment layers are a relevant fate of pollutants and may act as sources of contamination for the aquatic food web. 1,7,8 Although sediments are important indicators of environmental quality, it is considered a complex matrix and ECs are usually detected at low concentrations (ng g -1 levels). 8,9 Thus, sample preparation steps are always carried out aiming at decreasing interference and providing cleaner extract for further analysis.…”

Assessment of the use of tropical peats as local alternative materials for the adsorption of Pb, Zn and Cd: An equilibrium study

“…Brazil, like many other developing countries, struggles with PTE contaminations (Reis et al, 2019;Trevizani et al, 2019;Fernandes et al, 2020). As regards Mogi-Guaçu river basin, some studies have shown the presence of Pb, Cd, and Zn (among others PTE) in high concentrations in water, sediments, and living organisms; wherein, their concentrations can vary according to the period of floods (Tomazelli and Martinelli, 1999;Tomazelli, 2003;Silva, 2005;La Serra, 2015).…”