Review
Materials Science, Multidisciplinary
Sam A. Walling, Wooyong Um, Claire L. Corkhill, Neil C. Hyatt
Summary: Fenton or Fenton-like oxidation is a promising technology for treating organic radioactive wastes, although it has not been widely successful in mainstream treatment. The application of this process to real radioactive wastes has been documented in pilot-plant settings, showing potential benefits for higher volume or problematic organic wastestreams.
NPJ MATERIALS DEGRADATION
(2021)
Article
Chemistry, Multidisciplinary
Xin Zhao, Yusen Su, Andy Berbille, Zhong Lin Wang, Wei Tang
Summary: It has been found that dielectric films modified by inductively coupled plasma etching with argon show higher reactivity and degradation efficiency in contact-electro-catalysis process. The contact angle and specific surface area of the films are non-linearly affected by the etching time. This study suggests that film-based contact-electro-catalysis has potential for scalable applications.
Article
Chemistry, Physical
Guodong Zhao, Lixin Liang, Eryu Wang, Rongbiao Tong
Summary: The Achmatowicz rearrangement is a significant transformation for the synthesis of various heterocyclic building blocks and natural products. The discovery of Fenton chemistry for AchR using a bifunctional catalyst has environmental friendliness and a broad substrate scope, addressing limitations of conventional chemical and enzymatic methods. Reactice brominating species (RBS) is found to be the true catalyst for AchR, and the in situ RBS generation from M-Br-x-H2O2 under neutral conditions solves the longstanding issue of acidic additives required for bromide oxidation with H2O2, creating opportunities for other bromine-mediated organic reactions.
Article
Environmental Sciences
Jie Zhong, Bin Yang, Yong Feng, Yang Chen, Li-Gao Wang, Wen-Dan You, Guang-Guo Ying
Summary: Heterogeneous photo-Fenton reactions using a core-shell magnetic anion exchange resin (MAER) showed efficient removal of reactive brilliant red (X-3B) from textile dyeing wastewaters. MAER exhibited high catalytic activity and adsorption capacity, resulting in satisfactory removal efficiency for X-3B. The established heterogeneous oxidation system has potential for practical applications in treating textile dyeing wastewater.
Article
Chemistry, Physical
Yu-Yi Shen, Chung-Chun Hsu, Shao-Wei Tsai, Chia-Hung Hou
Summary: This study improved the electrosorptive removal of phosphate in membrane capacitive deionization by coating an activated carbon electrode with a heterogeneous anion-exchange resin layer. The AE-AC composite electrode significantly increased the selectivity coefficient of phosphate over chloride and improved the electrosorption capacity of phosphate.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Chemical
Haoran Wu, Lauren Valentino, Sean Riggio, Mark Holtzapple, Meltem Urgun-Demirtas
Summary: The lack of efficient separation methods is a major obstacle in implementing bio-based fuels and chemicals on a large scale. This study investigated the purification of acetic acid produced from biomass conversion using ion-exchange resins and pressure-driven membranes. The findings suggest that the pH of the solution significantly impacts adsorption capacity and membrane performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Xueru Wang, Yan Chen, Wenqi Xu, Arne Lindbrathen, Xinyue Cheng, Xi Chen, Liangliang Zhu, Liyuan Deng
Summary: Direct air capture (DAC) of CO2 is a supplementary technology to achieve zero-or negative-carbon emissions. Moisture-swing adsorption, particularly using amine-based anion-exchange resins (AER), is a promising DAC technology with low costs and ease of operation. However, the limited CO2 sorption capacity and desorption efficiency of current AERs hinder the large-scale implementation of DAC. This study developed a novel diamine-based double quaternary ammonium anion-exchange resin (Diamine-DQ-AER) with significantly improved DAC capacity and stable performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yang Liu, Zhiyuan Jiang, Yuming Guan, Qixia Bai, Zhe Zhang, Yiming Li, He Zhao, Ting-Zheng Xie, Ming Wang, Pingshan Wang, Tun Wu
Summary: The allosteric effect is crucial in metabolic regulation, but organizing synthetic receptors into supramolecular structures with different conformations and functions in response to external stimuli is challenging. In this study, quadruple-stranded helicates were generated through the templation effect of halide ions in a library of metallo-macrocycles, and their structures and properties were characterized.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Engineering, Chemical
Difan Zhang, Pradeep Gurunathan, Lauren Valentino, Yupo Lin, Roger Rousseau, Vanda Glezakou
Summary: The study used a combination of ab initio and classical molecular dynamic simulations to explore the adsorption/desorption and diffusion characteristics of ion-exchange resins in electrically-driven separation processes for organic anions. By decomposing the interaction energies and simulating organic diffusion, it was revealed that the geometries of the organic anions and the functional groups of the resins play a key role in controlling the diffusion process of organic compounds within the resins.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Almagul Ultarakova, Zaure Karshyga, Nina Lokhova, Azamat Yessengaziyev, Kaisar Kassymzhanov, Arailym Mukangaliyeva
Summary: This study investigated the sorption of niobium from chloride solutions using various anion-exchange organic sorbents. The Purolite A-100 resin showed the highest affinity for niobium ions, with a distribution coefficient of 184 mL/g and an extraction degree of 41.5%. The Langmuir model was found to be in good agreement with the experimental results, indicating monomolecular layer adsorption on the homogeneous adsorption centers of the resin. The optimal conditions for niobium sorption by the Purolite A-100 resin were determined as hydrochloric acid concentration of 5-10 wt.%, process temperature of 35-40 degrees C, and duration of 40-50 min. The activation energy for niobium sorption from hydrochloric acid solution was calculated to be 25.32 kJ/mol, suggesting a transition from diffusion to kinetic mode.
Article
Environmental Sciences
Yuye Luo, Cheng Liu, Siyuan He, Jiaqi Liu, Yuanyuan Ren
Summary: Anion exchange resin is widely used to remove anionic contaminants in drinking water treatment, however, without proper pretreatment, it may release organic material that contributes to the formation of disinfection byproducts (DBPs). This study examined the dissolution of magnetic anion exchange resins and their contribution to organics and DBPs. The results showed that the dissolution of the resin was affected by contact time and pH, with higher levels of dissolved organic carbon and dissolved organic nitrogen observed at longer exposure times and neutral pH. The formation potential of DBPs in the shedding fraction was also investigated, revealing significant concentrations of tri-chloromethane, dichloroacetonitrile, nitrosodimethylamine, and dichloroacetamide. Pre-cleaning treatments were found to inhibit resin leaching and reduce the concentration of leached organics and DBPs.
Article
Engineering, Environmental
Yufeng Liao, Mengmeng Tang, Mengyuan Li, Peng Shi, Aimin Li, Yangyang Zhang, Yang Pan
Summary: Disinfection byproducts (DBPs) are a potential health risk in drinking water. This study tested the control effects of three types of anion exchange resins (AERs) and two types of nanofiltration (NF) membranes on DBPs and their precursors. The results showed that the AER (M500MB) had the highest removal efficiency for DBP precursors, while the NF membrane (NF90) with a smaller molecular weight cut-off had a better control efficiency. A sequential approach combining AER adsorption and NF further increased the removal efficiencies of DOC, Br- and DBPs, and reduced the cytotoxicity of the water sample.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2023)
Article
Engineering, Chemical
Alicia L. Garcia-Costa, Jaime Carbajo, Asuncion Quintanilla, Francisco J. Yuste-Cordoba, Jose A. Casas
Summary: This study explores the feasibility of Fenton oxidation and Catalytic Wet Peroxide Oxidation (CWPO) at high temperature for treating complex cork-boiling wastewater. The results suggest that CWPO at 100 degrees C using activated carbon as catalyst is a promising alternative for on-site treatment of CBW.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Food Science & Technology
Yuanhang Zhen, Tao Zhang, Bo Jiang, Jingjing Chen
Summary: A method for efficient purification of resistant dextrin using membrane filtration and anion exchange resin decolorization was developed. The purified RD showed stable chemical characteristics and molecular weight, with improved water solubility, thermal stability, and rheological properties that make it suitable for widespread use in the food industry. Additionally, new glycosidic linkages resistant to digestive enzymes were formed in the purified RD, enhancing its potential health benefits.
Article
Engineering, Chemical
Mathieu Hebert, Emmanuel Serra, Eugene Vorobiev, Houcine Mhemdi
Summary: In this study, the purification of sinigrin and gluconapin from mustard seeds using anion exchange resin was investigated. The results showed that the strongly basic resin PA312LOH had better adsorption and selectivity towards glucosinolates. Optimization of operating conditions allowed the recovery of a high proportion of intact glucosinolates. Dynamic experiments further validated the feasibility of the purification process.
