AI Article Synopsis
Article Abstract
The separation and recovery of palladium from electronic waste (e-waste) are of great significance as they can alleviate environmental pollution and avoid resource loss. Herein, a novel nanofiber modified by 8-hydroxyquinoline (8-HQ-Nanofiber) with adsorption sites co-constructed by N and O atoms of hard bases was fabricated, which has good affinity properties for the Pd(II) ions belonging to soft acid in the leachate of e-waste. The adsorption mechanism of 8-HQ-Nanofiber for Pd(II) ions was revealed from the perspective of molecular level relied on a series of characterizations, such as FT-IR, ss-NMR, Zeta potential, XPS, BET, SEM and DFT. The adsorption of Pd(II) ions on 8-HQ-Nanofiber reached equilibrium within 30 min and the maximum uptake capacity was 281 mg/g at 318.15 K. The adsorption behavior of Pd(II) ions by 8-HQ-Nanofiber was described by the pseudo-second-order and Langmuir isotherm models. The 8-HQ-Nanofiber exhibited relatively good adsorption performance after 15 times of column adsorption. Finally, based on hard and soft acids and bases (HSAB) theory, a strategy to regulate the Lewis alkalinity of adsorption sites by specific spatial structures is proposed, which provides a new direction for the design of adsorption sites.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jhazmat.2023.132014 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Gold(III) Ions Sorption on Amberlite XAD-16 Impregnated with TBP After Leaching Smart Card Chips.
Molecules
January 2025
Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 2, 20-031 Lublin, Poland.
Owing to the intensive development of electrical and electronic equipment, there is an increasing demand for precious metals, which are often used for its production. Due to their scarce supply, it is important to recover them from secondary sources. A promising way to recover precious metals are impregnated resins.
View Article and Find Full Text PDFβ-C-H bond functionalization of ketones and esters by cationic Pd complexes.
Nature
January 2025
Department of Chemistry, The Scripps Research Institute, La Jolla, CA, USA.
C-H activation is the most direct way of functionalizing organic molecules. Many advances in this field still require specific directing groups to achieve the necessary activity and selectivity. Developing C-H activation reactions directed by native functional groups is essential for their broad application in synthesis.
View Article and Find Full Text PDFCross-linked chitosan as biomacromolecular adsorbents for adsorption of precious metal-chloride complexes from aqueous media.
Int J Biol Macromol
December 2024
Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon S7N 5C9, SK, Canada. Electronic address:
Precious metal recovery from secondary sources has received significant attention due to the reduced availability of precious metals from conventional sources. Herein, chitosan (CHT) was modified via cross-linking with glutaraldehyde (glu) to yield CHT-glu adsorbents with improved physicochemical and adsorption properties with precious metal ions (Au(III) and Pd(II)). CHT-glu adsorbents were prepared at variable glu ratios and characterized via complementary spectral (IR, C solids NMR, XPS) and thermogravimetry methods.
View Article and Find Full Text PDFExtraction and Complexation of Fission Products with Unsymmetrical Phenanthroline Diamide Ligands from Simulated High-Level Liquid Waste.
Inorg Chem
December 2024
College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
The extraction performance and complexation properties between some typical fission products (FPs) with phenanthroline-based ligands ,,-triethyl--tolyl-1,10-phenanthroline-2,9-dicarboxamide (DE-ET-DAPhen) and -ethyl-,-dioctyl--tolyl-1,10-phenanthroline-2,9-dicarboxamide (DO-ET-DAPhen) were described in this work. The low distributions of Ln(III) observed in the solvent extraction study showed the potential of the ligands for the separation of actinides and lanthanides in high-level liquid waste (HLLW). Further extraction studies on other FPs showed that the ligands could efficiently extract Pd(II) and Cd(II) using -octanol as a diluent.
View Article and Find Full Text PDFMechanistic Insights into Chloride-Dependent Uncaging Reaction of Propargyl and Allene-Protected Substrates by Pd-Complexes.
Chemistry
December 2024
Laboratory of Biomimetic Catalysis (LaCBio), Department of Chemistry, Federal University of Santa Catarina (UFSC), Campus Trindade, 88040-900, Florianópolis - SC, Brazil.
This study investigates the effect of chloride levels on the mode of action of palladium complexes for the activation of propargyl- and allene-protected fluorophores and chemotherapeutic drugs through uncaging reactions. Four Pd(II) complexes were synthesized and characterized using various spectroscopic techniques to confirm their structure and electronic properties. Kinetic studies and density functional theory calculations revealed that chloride ions in phosphate buffered saline (PBS) significantly enhance catalytic efficiency, particularly for allenyl-protected substrates compared to propargylic counterparts.
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!