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Engineered crystalline polymers for effective contaminant removal from water.
Sci Rep
December 2024
Department of Chemistry, University of Birjand, Birjand, 9717434765, Iran.
Herein, we discuss the structure-function of biomimetic imidazole-quartet substrates (I-quartets) obtained through the adaptive self-assembly of octyl-ureido-polyol structures in polyamide membranes designed as adsorbents. Molecular dynamics (MD) and well-tempered metadynamics simulations are utilized to examine ion contaminants' adsorption process and dynamic behaviors onto alkylureido-ethylimidazoles with well-defined supramolecular structures. Moreover, the atoms-in-molecules (AIM) analysis identified multiple types of atomic interactions between the contaminant molecules and the substrates.
View Article and Find Full Text PDFThe abundance, removal efficiency, and characteristics of microplastics in three urban wastewater treatment plants (WWTPs) on the southern coast of the Caspian Sea.
Environ Monit Assess
December 2024
Department of Earth Sciences, College of Science, Shiraz University, Shiraz, 71454, Iran.
Wastewater treatment plants (WWTPs) are one of the major collection points of microplastics (MPs). The MPs in influents and effluents of WWTPs were assessed for three cities on the southern coast of the Caspian Sea in the winter and spring seasons. The MP removal rate of WWTPs ranged between 71.
View Article and Find Full Text PDFThe EFSA Panel on Food Contact Materials assessed the safety of 2,2'-oxydiethylamine, which is intended to be used at up to 14% w/w as a monomer along with adipic acid and caprolactam to make polyamide thin films intended for single use, in contact with all types of food under all conditions of time and temperature. Specific migration of 2,2'-oxydiethylamine was tested from a polyamide film in water and was below the limit of quantification (LOQ) of 0.015 mg/kg.
View Article and Find Full Text PDFMicroplastic contamination in Indian rice: A comprehensive characterization and health risk assessment.
J Hazard Mater
December 2024
Tarsadia Institute of Chemical Science, Uka Tarsadia University, Maliba Campus, Bardoli, Tarsadi, 394350 Surat, Gujarat, India. Electronic address:
In this study, we investigate, for the first time, the abundance, distribution, chemical composition, and exposure of microplastics (MPs) in Indian rice and their impact on human health. The physical and chemical characteristics of MPs were measured using a stereomicroscope, μ-Fourier transform infrared spectroscopy, and μ-Raman spectroscopy. MPs were identified in all samples, with an average abundance of 30.
View Article and Find Full Text PDFPollution status of microplastics in the sediments of warm monomictic Dal lake, India: Abundance, composition, and risk assessment.
Environ Pollut
December 2024
Department of Environmental Sciences, Sharda University, Greater Noida, India. Electronic address:
This report presents the first investigation of microplastic (MP) contamination in the shoreline sediments of Dal Lake, Jammu and Kashmir, India. The MP concentrations ranged from 503 to 3154 MP/kg, with a notable seasonal variation. The highest concentrations of microplastics occurred in the Spring, ranging from 467 to 3445 MP/kg.
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