Publications by authors named "M Zennegg"
High production rates of chlorinated paraffins (CPs) and their widespread use resulted in a global contamination. Since 2017, short-chain CPs (SCCPs, C-C) are listed as persistent organic pollutants (POPs) in the Stockholm Convention. Technical CP mixtures contain hundreds of homologues and side products such as chlorinated olefins (COs), diolefins (CdiOs) and triolefins (CtriOs).
View Article and Find Full Text PDFPolychlorinated dibenzo--dioxin and dibenzofuran contamination of free-range eggs: estimation of the laying hen's soil ingestion based on a toxicokinetic model, and human consumption recommendations.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess
October 2024
Polychlorinated dibenzo--dioxins and dibenzofurans (PCDD/Fs) are ubiquitous in the environment. The main route of human exposure is through food consumption. Soil contamination can be problematic for sanitary safety depending on the usage of the soil, such as farming.
View Article and Find Full Text PDFUnderstanding the transfer of polychlorinated dibenzo--dioxins and dibenzofurans (PCDD/Fs) in farm animals is essential for ensuring food safety, but such information for suckler ewes () has been lacking. This work quantifies the accumulation, tissue distribution, and depuration kinetics of PCDD/Fs in these animals. Six suckler ewes (EXP group) were exposed to PCDD/Fs through contaminated hay (2.
View Article and Find Full Text PDFArticle Synopsis
- The study investigates human exposure to chlorinated paraffins (CPs) in sewage sludge from a Swiss wastewater treatment plant (WWTP) over several years, focusing on the regulation of short-chain CPs (SCCPs) since 2017 as persistent organic pollutants.
- Using advanced liquid chromatography mass spectrometry, researchers detected thousands of ions related to CPs and chlorinated olefins (COs), identifying a range of homologues and their distributions in the sludge.
- Results show a significant decrease in the levels of SCCPs (84%) and other chlorinated compounds from 1993 to 2020, indicating shifts in the presence of banned substances and suggesting that higher-chlorinated SCCPs have been replaced by
Grass-based suckling beef-derived foods occasionally exceed regulatory levels for polychlorinated biphenyls (PCBs) and dibenzo-p-dioxins/dibenzofurans (PCDD/Fs). Ensuring chemical safety requires understanding the cow-calf transgenerational PCB and PCDD/F fate. The current focus was on dairy cows, omitting transgenerational fate and suckling beef-related physiological effects.
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