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The sorption of algal organic matter by extracellular polymeric substances: Trade-offs in disinfection byproduct formation influenced by divalent ions.
Sci Total Environ
January 2025
College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, China. Electronic address:
Disinfection by-products (DBPs), formed from biofilm extracellular polymeric substances (EPS) and organic matter during regular disinfection practices in drinking water distribution systems, poses a potential threat to drinking water safety. However, the diverse DBP formations induced by the intertwined algal organic matter (AOM) and bacterial EPS remains elusive. In this study, we show substantial variations in EPS and DBP formation patterns driven by AOM biosorption with divalent ions (Ca and Mg).
View Article and Find Full Text PDFAdsorption and mineralization of metalaxyl-m and chlorpyrifos in irrigated Mediterranean soil under the effects of salinity.
Environ Sci Pollut Res Int
November 2024
University of Carthage, National Institute of Agronomy of Tunisia, LR/AGR14, Laboratory of Bioagressors and Integrated Protection in Agriculture, Department of Plant Health and Environment, Tunis, 1082, Tunisia.
To evaluate the effects of salinity on the fate of pesticides in a Mediterranean irrigated system, experiments were carried out under laboratory conditions to determine the adsorption, desorption, and mineralization of chlorpyrifos (CPF) and metalaxyl-M (MET) in a soil sample from an irrigated field in northern Tunisia. Adsorption/desorption isotherms and mineralization kinetics data were obtained over a realistic range of salinities via batch equilibrium and incubation techniques. On the basis of the experimental results, MET has a lower sorption capacity than CPF does, and the adsorption data for both compounds were better fitted by the Freundlich equation, with K values of 0.
View Article and Find Full Text PDFExperimental Investigation of Regenerated Cellulose Microdialysis Probe Sterilization.
J Appl Polym Sci
June 2024
Department of Mechanical Engineering, UT Austin.
Sterilization of devices is important in hospitals, operating theatres, and emergency rooms. Microdialysis allows in vivo sampling of small molecules and is used for clinical studies. Microdialysis probes are made of soft, flexible, porous polymeric membranes.
View Article and Find Full Text PDFImpact of different sterilisation techniques on sorption and NER formation of test chemicals in soil.
Chemosphere
June 2024
Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Auf dem Aberg 1, 57392, Schmallenberg, Germany. Electronic address:
Standard OECD tests are used to generate data on biodegradation (OECD 307) and sorption (OECD 106) of test chemicals in soil. In such tests, data on abiotic degradation using sterile samples are utilised to investigate any losses due to abiotic processes. The data from sterile samples are also used to interpret results and findings of non-sterile samples, especially in the context of sorption and non-extractable residue (NER) formation.
View Article and Find Full Text PDFNitrogen fertiliser-domesticated microbes change the persistence and metabolic profile of atrazine in soil.
J Hazard Mater
May 2024
Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, People's Republic of China. Electronic address:
Pesticides and fertilisers are frequently used and may co-exist on farmlands. The overfertilisation of soil may have a profound influence on pesticide residues, but the mechanism remains unclear. The effects of chemical fertilisers on the environmental behaviour of atrazine and their underlying mechanisms were investigated.
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