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Lodeiro Pablo Martínez-Cabanas María Herrero Roberto Barriada José L. Vilariño Teresa Rodríguez-Barro Pilar Sastre de Vicente Manuel E. 《Environmental Chemistry Letters》2019,17(3):1281-1298
Environmental Chemistry Letters - A broad variety of materials of biological origin have been successfully used in recent decades for the removal of pollutants from waters. These biosorbents... 相似文献
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Lodeiro P Barriada JL Herrero R Sastre de Vicente ME 《Environmental pollution (Barking, Essex : 1987)》2006,142(2):264-273
This work reports kinetic and equilibrium studies of cadmium(II) and lead(II) adsorption by the brown seaweed Cystoseira baccata. Kinetic experiments demonstrated rapid metal uptake. Kinetic data were satisfactorily described by a pseudo-second order chemical sorption process. Temperature change from 15 to 45 degrees C showed small variation on kinetic parameters. Langmuir-Freundlich equation was selected to describe the metal isotherms and the proton binding in acid-base titrations. The maximum metal uptake values were around 0.9 mmol g(-1) (101 and 186 mg g(-1) for cadmium(II) and lead(II), respectively) at pH 4.5 (raw biomass), while the number of weak acid groups were 2.2 mmol g(-1) and their proton binding constant, K(H), 10(3.67) (protonated biomass). FTIR analysis confirmed the participation of carboxyl groups in metal uptake. The metal sorption was found to increase with the solution pH reaching a plateau above pH 4. Calcium and sodium nitrate salts in solution were found to affect considerably the metal biosorption. 相似文献
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María Benavides Javier Fernández-Lodeiro Pedro Coelho Carlos Lodeiro Mário S. Diniz 《Environmental science and pollution research international》2016,23(24):24578-24591
The increasing use of nanoparticles (NPs) worldwide has raised some concerns about their impact on the environment. The aim of the study was to assess the toxicity of metal oxide nanoparticles, singly or combined, in a freshwater fish (Carassius auratus). The fish were exposed for 7, 14, and 21 days to different concentrations of NPs (10 μg Al2O3.L?1, 10 μg ZnO.L?1, 10 μg Al2O3.L?1 plus 10 μg ZnO.L?1, 100 μg Al2O3.L?1, 100 μg ZnO.L?1, and 100 μg Al2O3.L?1 plus 100 μg ZnO.L?1). At the end of each exposure period, antioxidant enzyme activity (catalase, glutathione-S-transferase, and superoxide dismutase), lipid peroxidation, and histopathology were assessed in the gills and livers of C. auratus. The results show an increase in catalase (CAT) and superoxide dismutase (SOD) activity in the gills and livers of fish, especially after 14 days of exposure to single and combined NPs, followed by a reduction at 21 days. An increase in glutathione S-transferase (GST) was observed in gills after 7 days for all tested NP concentrations (single and combined); while in livers, a significant increase was determined after 14 days of exposure to 100 μg.L?1 of both single ZnO and Al2O3 NPs. Lipid peroxidation (LPO) significantly increased in gills after 7 days of exposure to 100 μg.L?1 Al2O3 NPs (single or combined). In livers, LPO increased significantly after 7 days of exposure to all tested concentrations of both single ZnO and Al2O3 (except for 10 μg Al2O3.L?1), and after 14 days of exposure to ZnO (10 and 100 μg.L?1) and Al2O3 (100 μg.L?1). The results from histological observations suggest that exposure to metal oxide NPs affected both livers and gills, presenting alterations such as gill hyperplasia and liver degeneration. However, the most pronounced effects were found in gills. In general, this study shows that the tested NPs, single or combined, are capable of causing sub-lethal effects on C. auratus, but when combined, NPs seem to be slightly more toxic than when added alone. 相似文献
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Lodeiro Carlos Capelo-Martínez José Luis Santos Hugo M. Oliveira Elisabete 《Environmental science and pollution research international》2021,28(15):18309-18313
Environmental Science and Pollution Research - Every 2 years, the environmental, chemical, and health research communities meet in Costa de Caparica, Portugal to showcase the latest... 相似文献
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