Publications by authors named "S Bristeau"
Perfluorooctanesulfonic acid (PFOS) is one of the most investigated Per- and polyfluoroalkyl substances (PFAS) for being the strongest compound to eliminate and having adverse health concerns. In this work, we have conducted the sonochemical treatment of PFOS simulated water under high (500 kHz) and low (22 kHz) frequencies while monitoring the operational parameters via an integrated sonochemical system. The integrated advanced sonochemical system includes software to monitor treatment power, solution temperature and frequency while allowing distinctive control of the reaction conditions.
View Article and Find Full Text PDFResearch Question: Are bisphenols released from disposable devices used in assisted reproductive technology (ART) procedures, and do they accumulate when several disposable devices are used sequentially under routine conditions?
Design: A comprehensive assessment of 19 individual disposable devices (31 assessments) and nine combinations of disposable devices replicating the main steps in an ART procedure was undertaken. The extraction of bisphenols followed routine-use conditions (temperature and duration). The concentrations of 10 bisphenols were determined using online solid-phase extraction/liquid chromatography/mass spectrometry methodology.
Article Synopsis
- Remediation of PFAS-contaminated soils is complex because of PFAS compounds' distinct properties, like variable solubility and resistance to breakdown.
- Using non-Newtonian fluids, like an ethanol/xanthan mixture (XE), can enhance the efficiency of in-situ soil flushing for these contaminants.
- Lab tests showed that XE significantly improved recovery rates of PFAS, with over 99% recovery for most compounds, demonstrating the potential of this method for treating contaminated soils.
Emerging contaminants are a growing concern for scientists and public authorities. The group of per-polyfluoroalkyl substances (PFAS), known as 'forever chemicals', in complex environmental liquid and solid matrices was analysed in this study. The development of global analytical methods based on combustion ion chromatography (CIC) is expected to provide accurate picture of the overall PFAS contamination level via the determination of extractable organic fluorine (EOF) and adsorbable organic fluorine (AOF).
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- Intensive use of pesticides leads to environmental contamination and significant health risks due to exposure to chemical residues, particularly affecting the liver, which is crucial for metabolizing these substances.
- A study on a mixture of seven common pesticides revealed strong cytotoxic effects on liver cells, primarily caused by manganese-containing dithiocarbamates (maneb and mancozeb), even at low concentrations.
- The mechanism of toxicity involves oxidative stress and intrinsic apoptosis triggered by altered manganese and zinc levels due to the metabolization of these pesticides, with potential protective effects from zinc supplementation.