A novel chitosan-based porous composite adsorbent with multifunctional groups, such as phosphoric acid, amidoxime, and quaternary ammonium groups, was prepared to improve the adsorption rate and competitive uranium‑vanadium adsorption of amidoxime group adsorbents. The maximum uranium adsorption capacity of PACNC was 962.226 mg g at 308 K and pH = 7. The maximum adsorption rate constant of PACNC for uranium was 2.83E-2 g mg min, which is 2.38 times that of ACNC (1.19E-2 g mg min). Moreover, the adsorption equilibrium time was shortened from 300 (ACNC) to 50 (PACNC) min. In simulated and real seawater, the K and adsorption capacity of PACNC for uranium were approximately 8 and 6.62 times those for vanadium, respectively. These results suggest that phosphorylation significantly improved the competitive adsorption of uranium‑vanadium and uranium adsorption rate. PACNC also exhibited good recycling performance and maintained stable adsorption capacity after five cycles. DFT calculations were used to analyze and calculate the possible co-complex structure of PACNC and uranium. The binding structure of phosphate and amidoxime is the most stable, and its synergistic effect effectively improves the competitive adsorption of uranium-vanadium of amidoxime. All the results demonstrated that PACNC has substantial application potential for uranium extraction from seawater.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ijbiomac.2023.124074 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
BiOBr/Coal Gangue-Based SAPO-5 Molecular Sieve Nanocomposite for Enhanced Adsorption and Photocatalytic Degradation of Methylene Blue.
Nanomaterials (Basel)
February 2025
College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
The accumulation of organic pollutants and solid waste is one of the major environmental challenges faced globally. Establishing an efficient recycling system for solid waste and designing cost-effective, high-performance photocatalysts are urgent tasks for the removal of organic pollutants from water. This study utilizes coal gangue as the precursor to synthesize a coal gangue-based phosphorus-silicon-aluminum molecular sieve (SAPO-5) via hydrothermal synthesis.
View Article and Find Full Text PDFHigh-Throughput Proteoform Imaging for Revealing Spatial-Resolved Changes in Brain Tissues Associated with Alzheimer's Disease.
Adv Sci (Weinh)
March 2025
State Key Laboratory of Medical Proteomics, National Chromatographic R. & A. Center, CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Spatially resolved characterization of proteoforms has substantial potential to significantly advance the understanding of physiological and disease mechanisms. However, challenges remain regarding throughput and coverage. A robust method is developed for high-throughput proteoform imaging (HTPi) by combining matrix-assisted laser desorption ionization mass spectrometry imaging (MALDI MSI) and region-specific top-down proteomic analysis.
View Article and Find Full Text PDFAtomic intercalation - an approach to enhance photogenerated carrier dynamics for efficient photocatalysis carbon dioxide reduction.
ChemSusChem
March 2025
UOW: University of Wollongong, Australian Institute of Innovative Materials, Innovation Campus, University of Wollongong, Squires Way, 2500, North Wollongong, AUSTRALIA.
Visible-light-driven CO2 reduction presents a long-term answer to environmental challenges. The limited effective optical carriers generated by the limited response dynamics of the existing photocatalyst have severely hindered the development of high efficiency photocatalysts. Here, we report a method of cobalt atoms intercalation in ultrathin BiOBr nanosheets for boosted photocatalytic CO2 reduction.
View Article and Find Full Text PDFTrending green atom transfer radical polymerization (ATRP)-modified lactic acid bacteria: application as a bioadsorbent to detoxicate aflatoxin B in grains.
J Sci Food Agric
March 2025
Hebei Key Laboratory of Quality & Safety Analysis-Testing for Agro-products and Food, Hebei North University, Zhangjiakou, China.
Background: To address the severe health risks posed by aflatoxin B (AFB) in grain, this study employed polydopamine-based atom transfer radical polymerization (p-ATRP) and cytochrome C-catalyzed atom transfer radical polymerization (c-ATRP) as cytocompatible modification techniques to coat the surface of living Lactobacillus plantarum (LAB) cells with the temperature-sensitive polymer poly(N-isopropylacrylamide) (PNIPAAm).
Results: Two novel bioadsorbents were synthesized. The incorporation of PNIPAAm as an 'AFB vacuum cleaner' layer significantly enhances LAB's adsorption efficiency and enables temperature-controlled desorption.
Effect of persulfate dosage on organic degradation using N-doped biochar: Reaction pathway and environmental implications.
Water Environ Res
March 2025
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, P. R. China.
Persulfate-based advanced oxidation processes (PS-AOPs) catalyzed by carbon-based catalysts are promising for removing organic pollutants via radical/non-radical pathways. However, the activation efficiency of peroxymonosulfate (PMS) or peroxydisulfate (PDS) usage and the reaction mechanism remain insufficiently understood. In this study, the effects of PMS/PDS dosage on the degradation of bisphenol A (BPA, 10 mg/L) were evaluated using N-doped biochar (N-BC, 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!