Publications by authors named "Erico A Oliveira Pereira"
Article Synopsis
- Pharmaceuticals persist in water due to extensive use, leading to various impairments in aquatic life, with the need for deeper molecular comparisons among species.
- The study examined the effects of analgesics acetaminophen, diclofenac, and ibuprofen on the crustacean Daphnia magna and freshwater fish Japanese medaka, noting that D. magna showed more significant metabolic changes.
- Results indicated D. magna is generally more sensitive to these pharmaceuticals than medaka, establishing the importance of using environmental metabolomics for effective biomonitoring of freshwater ecosystems.
Industrial wastewater effluents are a major source of chemicals in aquatic environments, and many of these chemicals may negatively impact aquatic life. In this study, the crustacean Daphnia magna, a common model organism in ecotoxicity studies, was exposed for 48 h to nine different industrial effluent samples from manufacturing facilities associated with the production of plastics, polymers, and coating products at a range of dilutions: 10, 25, 50, 100% (undiluted). A targeted metabolomic-based approach using liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used to quantify polar metabolites from individual daphnids that survived the 48 h exposure.
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- Phthalic acid esters (PAEs) are additives used in plastics that can leach into the environment and disrupt endocrine and metabolic functions in aquatic organisms.
- The study specifically analyzed the effects of four types of phthalates on the freshwater crustacean Daphnia magna using targeted metabolomic techniques, revealing distinct metabolic changes and disruptions in biochemical pathways.
- Findings indicate that phthalates cause unique but related metabolic disturbances, suggesting a common toxic mechanism that highlights the limitations of traditional acute toxicity assessments.
Per- and polyfluoroalkyl substances (PFAS) are a class of persistent organic pollutants used in industrial applications because of their physicochemical properties, which results in their ubiquitous presence across environmental matrices. To date, legacy PFAS have been well studied; however, the concentration of alternative PFAS may exceed the concentration of legacy pollutants, and more information is needed regarding the sublethal toxicity at the molecular level of aquatic model organisms, such as Daphnia magna. Perfluorobutanoic acid (PFBA), perfluorohexanoic acid (PFHxA), perfluorohexanesulfonic acid (PFHxS), and perfluorononanoic acid (PFNA) are four widely detected PFAS alternatives of varying chain length and polar functionality that are quantified in aquatic environments.
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- PFAS are persistent and toxic pollutants found in water, with well-studied legacy types like PFOS and PFOA, while newer types like GenX are emerging with less known toxicity data.
- A study using Daphnia magna examined the acute sub-lethal toxicity of PFOS, PFOA, GenX, and their mixtures, revealing significant metabolic disruptions in exposed organisms compared to unexposed ones.
- The research highlighted that exposure to PFAS affected amino acids and disrupted various metabolic pathways, indicating potential issues with energy metabolism and protein synthesis, while also noting differences in effects based on the chemical structure of the pollutants.
Bisphenols are used in the production of polycarbonate plastics and epoxy resins. Bisphenol A (BPA) has been widely studied and is believed to act as an endocrine disruptor. Bisphenol F (BPF) and bisphenol S (BPS) have increasingly been employed as replacements for BPA, although previous studies suggested that they yield similar physiological responses to several organisms.
View Article and Find Full Text PDFWe investigated the adsorption of glyphosate onto five subtropical soils of Paraná and São Paulo states, Brazil, a region of intense agricultural activities, aiming at the determination of kinetic and isotherm adsorption parameters which enable the evaluation of the potential leaching of the herbicide. The adsorption was fast, being described by the pseudo-second order and intraparticle diffusion models, thus suggesting that mixed mechanisms are involved. The Oxisol containing the highest concentrations of metal oxides (209.
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- The paper presents a cost-effective chromatography method for measuring glyphosate and its breakdown product in environmental samples, utilizing a pre-column conversion process.
- It highlights the advantages of decreased analyte polarity for better retention on a chromatography column, allowing separation from common polar substances found in water and soil.
- Results showed good accuracy and sensitivity, with the method effectively applied to study glyphosate adsorption in soil, improving efficiency in environmental sample analysis.