No abstract

This study aimed to evaluate the metal exposure through the concentration of essential and toxic micro-minerals in biological samples of Phrynops geoffroanus from an anthropized river. The work was carried out in four areas with different ow characteristics and uses of the river, where individuals of both sexes were captured during the dry and rainy seasons. The elements Al, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, and Zn, were quanti ed in samples of serum (168), muscle (62), liver (61), and kidney (61) by Inductively Coupled Plasma Optical Emission Spectrometry. The concentration of the elements varied according to the sample type, being higher in the liver and the kidney. In the serum, many elements were below the limit of quanti cation, but it was possible to determine Al, Cu, Fe, Mn, Pb, and Zn. The liver showed high levels of Cu, Fe, and Pb, and muscle for Ni, Pb, and Zn, with most of the elements accumulated in the kidney tissue (Al, Cd, Co, Cr, Mn, Mo, and Ni). There was no signi cant difference between sex in the accumulation of elements. Between seasons, Cu was higher in serum and Mn in muscle and liver in the dry period, while in the kidney, almost all the elements were higher in the rainy period. The concentrations of the elements in the samples indicated a high degree of environmental contamination, representing risk in the use of the river and consumption of food from local sheries. * Values below the limit of quanti cation (LOQ) of the method.Signi cant p-values are shown in bold font. Table 6Comparison between the maximum limits of the elements in the Brazilian norms and the lowest mean found in the studied areas for Phrynops geoffroanus samples from the Capibaribe River, Pernambuco, Brazil.

Com o objetivo de desenvolver atividades de monitoramento ambiental na ilha de Fernando de Noronha, a Companhia de Eletrificação de Pernambuco está desenvolvendo uma série de estudos sobre água, solo e qualidade do ar. Para este fim, o Instituto Avançado de Tecnologia e Inovação promoveu campanhas na ilha para coletas de dados. Com recursos do Programa de Pesquisa e desenvolvimento da Agência Nacional de energia Elétrica foram programadas seis viagens durante os anos de 2018 e 2019 para estudos de qualidade ambiental. Foram escolhidas quatro praias para coletas, sendo duas na porção do mar de dentro da ilha e duas no mar de fora. As amostras de estudos de coliformes foram processadas ainda na ilha, por meio de testes rápidos com inoculação em Placas 3M™ Petrifilm™ e cultivo em estufa microbiológica. Paralelamente foram coletadas amostras da água para estudos de parâmetros físico-químicos básicos. Do ponto de vista das análises de coliformes as praias podem ser classificadas como balneabilidade Excelente, conforme indicação da Resolução no 20 do CONAMA. O maior valor registrado atingiu acima de 5.000 NMP/100g-1 para a praia do Porto, em período de alta estação turística. Embora os valores registrados estejam, no geral, em condições muito boas, estudos de coliformes presentes no sedimento arenoso seriam complementares importantes para um diagnóstico mais preciso sobre a qualidade ambiental das praias estudadas.

This study aimed to evaluate the metal exposure through the concentration of essential and toxic micro-minerals in biological samples of Phrynops geoffroanus from an anthropized river. The work was carried out in four areas with different flow characteristics and uses of the river, where individuals of both sexes were captured during the dry and rainy seasons. The elements Al, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, and Zn, were quantified in samples of serum (168), muscle (62), liver (61), and kidney (61) by Inductively Coupled Plasma Optical Emission Spectrometry. The concentration of the elements varied according to the sample type, being higher in the liver and the kidney. In the serum, many elements were below the limit of quantification, but it was possible to determine Al, Cu, Fe, Mn, Pb, and Zn. The liver showed high levels of Cu, Fe, and Pb, and muscle for Ni, Pb, and Zn, with most of the elements accumulated in the kidney tissue (Al, Cd, Co, Cr, Mn, Mo, and Ni). There was no significant difference between sex in the accumulation of elements. Between seasons, Cu was higher in serum and Mn in muscle and liver in the dry period, while in the kidney, almost all the elements were higher in the rainy period. The concentrations of the elements in the samples indicated a high degree of environmental contamination, representing risk in the use of the river and consumption of food from local fisheries.

In the environmental policy of the Pernambuco Thermoelectric Power Plant, there are plans for monitoring the environmental quality. This study is about the marine phytoplankton community, in the area of ​​influence it has followed a regularity of studies in its catchment channel and in the area of ​​disposal of the submarine outfall. Collections were made every three months, between March 2020 and October 2021. Collections were carried out by trawling 20 µm nets in the area of the submarine outfall and using a Van Dorn oceanographic bottle, inside the catchment channel. from the plant. The taxonomic analyzes showed that in the water catchment channel the genera Chaetoceros and Navicula stood out for their abundance, being represented by 956 and 283 individuals, respectively. At the collection point, the most abundant genera were Pinnularia and Oscillatoria, with 1978 and 559 representatives, respectively.