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Covalently crosslinked carboxymethyl chitosan beads containing SiO and ionic polymer for efficient adsorptive removal of methylene blue.
Int J Biol Macromol
January 2025
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China. Electronic address:
The carboxymethyl chitosan (CMCS)-based porous beads are still criticized for their limited number of binding sites, which impairs their efficacy in removing aqueous pollutants. To overcome this challenge, this work introduces the production of covalently crosslinked CMCS-based beads containing SiO and poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS). The porous composite beads not only possess remarkable stability under acidic conditions, but also have abundant active binding sites for adsorption.
View Article and Find Full Text PDFBenzotrithiophene-based covalent organic frameworks for sensitive fluorescence detection and efficient removal of Ag from drinking water.
Talanta
December 2024
Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China; Shenzhen Key Laboratory of Food Macromolecules Science and Processing, Shenzhen University, Shenzhen 518060, China. Electronic address:
The simultaneous detection and removal of Ag from drinking water was crucial for preventing human health, while it was also extremely challenging due to bifunctional materials that combine both Ag adsorption and detection functions rarely being explored. In this study, a benzotrithiophene-based covalent organic framework (TAPA-BTT) was synthesized and applied to detect and remove Ag. TAPA-BTT exhibited high crystallinity, a large specific surface area, and good thermal stability.
View Article and Find Full Text PDFInsect-derived biochar for CO adsorption under humid conditions: Elucidating adsorption mechanisms and competitive interactions with water molecules.
Sci Total Environ
January 2025
Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea. Electronic address:
The CO adsorption capacity of biochar depends on the type of biomass used and its physicochemical properties; various sorption parameters including temperature, CO concentration, and humidity affect the CO adsorption capacity. Biochar derived from defatted black soldier fly larvae (BSFL) biomass was investigated for direct CO capture and exhibited a hydrophilic/mesoporous structure that contained high concentrations of alkali and alkaline metals (>10 wt%), which contribute to CO chemisorption. The CO adsorption efficiency was higher at 25 °C compared with that at 30 °C and 35 °C, probably due to reduced Brownian motion of CO molecules at lower temperatures.
View Article and Find Full Text PDFMagnetic nanoparticle modified moss Biochar: A novel solution for effective removal of enrofloxacin from aquaculture water.
J Environ Manage
January 2025
Wuxi Fisheries College, Nanjing Agricultural University, 214081, Wuxi, PR China; Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081 Wuxi, PR China; Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Environmental Factors (Wuxi), Ministry of Agriculture and Rural Affairs, 214081, Wuxi, PR China; Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture and Rural Affairs, 100000, Beijing, PR China; Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, PR China. Electronic address:
The presence of residual antibiotics in water constitutes a potential threat to aquatic environments. Therefore, designing environmentally friendly and efficient biochar adsorbents is crucial. Aquaculture by-product moss (bryophyte) was transformed into biochar, which can eliminate antibiotics from wastewater through adsorption.
View Article and Find Full Text PDFMethane Adsorption in Heterogeneous Potential Wells of Coal: Characterization Model and Applications.
Langmuir
January 2025
Key Laboratory of Insitu Property improving Mining of Ministry of Education, Taiyuan University of Technology, No,18 Xinkuangyuan Road, Wanbailin District, Taiyuan, Shanxi 030024, P. R. China.
In terms of the phenomenon of nonuniformity adsorption energy between methane and a natural heterogeneous coal surface, a heterogeneous potential well model is established in this study based on adsorption science and molecular dynamics theories. This model describes the methane adsorption positions in coal pores as a three-dimensional space composed of adsorption equipotential surfaces with varying depths of potential well, which emphasizes the heterogeneous distribution of methane adsorption potential well depths in coal and accurately describes the spatial distribution and energy states of methane molecules during methane adsorption and desorption in naturally heterogeneous coal. By taking the residual sum of squares (RSS) and Pearson correlation coefficient as indicators, the fitting accuracies of the Langmuir model and the heterogeneous potential well model for isothermal adsorption and desorption curves are compared so that the superiority of the heterogeneous potential well model in describing the adsorption and desorption of methane in natural coal is confirmed.
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