Facile Synthesis of Acyl-Hydrazone Composites Based on Hydrazide-Modified Formylated Polystyrene for Effective Removal of Heavy Metal Ions and Sulfides from Water DOI
Tao Liu, Zhengfeng Xie, Tianyi Zhang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1049 - 1063

Published: Dec. 19, 2024

In this study, waste polystyrene was modified and upgraded to prepare formylated polystyrene, the acetyl hydrazone (LT-HPA) synthesized by condensation with polymethyl-propionyl-hydrazine. It is proven that modification of adsorption material successful various characterization methods. subsequent pollutant removal pH, mass, concentration, contact time, salt ion interference were investigated. The optimal pH for Cu(II) sulfide 5 11, respectively, mass adsorbent 1 g/L. found maximum rate Cu (II) 231.51 mg/g. equilibrium time less than 40 min. This due good activity acyl hydrazide groups on skeleton through coordination. desulfurization amount in 60 min 370.21 mg/g, which mainly caused oxidation sulfides surface oxidizing groups. Isotherm kinetic studies show processes are consistent Langmuir model pseudo-second-order model. Thermodynamic parameters a spontaneous endothermic process. mechanism chemical adsorption, supplemented physical adsorption. After 10 regenerated adsorption/desorption cycles, rates remained above 85%, indicating polystyrenesulfonate acetylhydrazone materials have reusability. addition, has thermal stability, resistance, environmental friendliness. summary, application prospect copper(II) provides fresh way upgrading polystyrene.

Language: Английский

Efficient Separation and Enrichment of Rubidium in Salt Lake Brine Using High-Performance PAN-KCuFC-PEG Adsorption Composite DOI Creative Commons

Linhong Wu,

Kun Zhou, Yuchen Zheng

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(6), P. 1273 - 1273

Published: March 12, 2025

Salt lake brine contains abundant rubidium resources; however, the separation of from with a high K content remains significant challenge in metallurgical processes and materials science. In this study, PAN-KCuFC-PEG particles were synthesized by phase transformation, using hydrophilic polyacrylonitrile (PAN) as skeleton structure, potassium cupric ferricyanide (KCuFC) active component water-soluble polymer polyethylene glycol (PEG) pore regulator. Characterization revealed that addition PEG increased volume 63% BET surface area 172%. KCuFC powder was uniformly dispersed PAN-KCuFC-PEG, its crystal structure remained stable after loading. static adsorption experiments, maximum capacity for Rb+ reached 190 mg/g. The behavior followed pseudo-second-order kinetic model, rate jointly controlled external diffusion, intraparticle chemical reaction. column experiment, used to adsorb Qarhan Lake (K: 26,000 mg/L, Rb: 65 mg/L). NH4Cl employed elution desorption PAN-KCuFC-PEG. During adsorption–desorption process, factor between Rb 160, 96.6%, overall yield 68.3%. enrichment successfully achieved.

Language: Английский

Citations

0
Acid-base in-situ reaction enhanced dispersion of copper ferrocyanide on modified polyacrylonitrile membrane for efficient Cs removal DOI
Lijun Meng, Li‐Han Liu, Senjian Han

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116528 - 116528

Published: April 1, 2025

Language: Английский

Citations

0
Novel and Sustainable Materials for the Separation of Lithium, Rubidium, and Cesium Ions from Aqueous Solutions in Adsorption Processes—A Review DOI Open Access
Małgorzata A. Kaczorowska

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6158 - 6158

Published: Dec. 17, 2024

The growing demand for alkali metals (AMs), such as lithium, cesium, and rubidium, related to their wide application across various industries (e.g., electronics, medicine, aerospace, etc.) the limited resources of naturally occurring ores, has led an increased interest in methods recovery from secondary sources brines, wastewater, waste leachates). One dynamically developing research directions field separation AMs ions aqueous solutions is search novel, efficient, “green” materials that could be used adsorption processes, also on a larger industrial scale. This review concerns latest achievements (mainly 2023 2024) development innovative ion sieves, aluminum-based adsorbents, mineral composites, resins) Li+, Cs+, Rb+ solutions, with particular emphasis most important advantages limitations, well potential impact environment.

Language: Английский

Citations

1
Construction of low-vacancy hexagonal Prussian blue analogues for efficient rubidium recovery DOI
Gan Li, Ting Wang,

Yating Xue

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 359, P. 130842 - 130842

Published: Dec. 3, 2024

Language: Английский

Citations

0
Acid-Base In-Situ Reaction Enhanced Dispersion of Copper Ferrocyanide on Modified Polyacrylonitrile Membrane for Efficient Cs Removal DOI
Lijun Meng, Li‐Han Liu, Senjian Han

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
Facile Synthesis of Acyl-Hydrazone Composites Based on Hydrazide-Modified Formylated Polystyrene for Effective Removal of Heavy Metal Ions and Sulfides from Water DOI
Tao Liu, Zhengfeng Xie, Tianyi Zhang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1049 - 1063

Published: Dec. 19, 2024

In this study, waste polystyrene was modified and upgraded to prepare formylated polystyrene, the acetyl hydrazone (LT-HPA) synthesized by condensation with polymethyl-propionyl-hydrazine. It is proven that modification of adsorption material successful various characterization methods. subsequent pollutant removal pH, mass, concentration, contact time, salt ion interference were investigated. The optimal pH for Cu(II) sulfide 5 11, respectively, mass adsorbent 1 g/L. found maximum rate Cu (II) 231.51 mg/g. equilibrium time less than 40 min. This due good activity acyl hydrazide groups on skeleton through coordination. desulfurization amount in 60 min 370.21 mg/g, which mainly caused oxidation sulfides surface oxidizing groups. Isotherm kinetic studies show processes are consistent Langmuir model pseudo-second-order model. Thermodynamic parameters a spontaneous endothermic process. mechanism chemical adsorption, supplemented physical adsorption. After 10 regenerated adsorption/desorption cycles, rates remained above 85%, indicating polystyrenesulfonate acetylhydrazone materials have reusability. addition, has thermal stability, resistance, environmental friendliness. summary, application prospect copper(II) provides fresh way upgrading polystyrene.

Language: Английский

Citations

0