Article
Chemistry, Physical
Ping Li, Yunan Lin, Shien Zhao, Yi Fu, Wenqin Li, Ran Chen, Shuanghong Tian
Summary: The study highlights the development of high-efficiency catalysts through rational architectural design and defect engineering, presenting a defect-engineered Co3O4 catalyst with porous multishelled hollow architecture for considerably boosted degradation of recalcitrant organics. The special morphology of the catalyst contributes to active site exposure and mass diffusion, resulting in up to 46 times of catalytic enhancement compared to commercial Co3O4.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Anai Laurel Leon, Nicolas Alejandro Sacco, Fernanda Miranda Zoppas, Rosario Galindo, Emilio Munoz Sandoval, Fernanda Albana Marchesini
Summary: Dopamine is a crucial neurotransmitter in the human body but a subnormal level can cause neurological problems. The use of dopamine as medicine and its presence in water bodies has increased. The removal of dopamine from water is essential to ensure water safety. Advanced oxidative processes (AOPs) have been proven effective in removing toxic compounds. Fe-based multi-walled carbon nanotubes (MWCNTs) exhibit high catalytic activity in the AOP of dopamine, with a 99% elimination rate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Organic
Jiaxing Chen, Yongzhuo Xu, Wen Shao, Jianhua Ji, Boqiang Wang, Muyang Yang, Guojiang Mao, Fuhong Xiao, Guo-Jun Deng
Summary: A Pd-catalyzed C-O cross-coupling reaction was reported, which allows for the synthesis of highly congested hydroxylamines with an α-quaternary carbon center without cleavage of the N-O bond. This strategy shows high chemoselectivity, broad substrate scope, and excellent functional group tolerance, and has been demonstrated by pharmaceutical derivatization and postcatalytic modifications.
Article
Environmental Sciences
Yongkai Chen, Congwei Luo, Fengxun Tan, Lubing Yang
Summary: In this study, an N-ZnO/g-C3N4 Z-scheme photocatalyst was constructed and characterized. The modified catalyst showed improved separation efficiency of photoinduced charge pairs and utilization of sunlight. Kinetics experiments demonstrated the significant advantage of this catalyst in degradation of atrazine. Increasing PDS concentration, catalyst dosage, and solution acidity accelerated the removal of the dye. The presence of HCO3-/CO32-, Cl-, and NOM inhibited the oxidation efficiency of the photocatalytic system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Chen Chen, Hao Sun, Shengyu Zhang, Xiaosi Su
Summary: Biochar has shown potential as an alternative to carbonaceous catalysts for the oxidation of organic pollutants, but its catalytic performance is generally unsatisfactory due to its inert carbon framework. This study fabricated nitrogen-doped biochar (N-BC) using corn stalk and melamine as precursors. The N-BC/PDS system exhibited excellent catalytic ability, achieving a 98.4% degradation efficiency of 2,4-dichlorophenol (2,4-DCP) in 40 minutes. N-BC maintained its catalytic activity in both artificial and natural water conditions, providing new insights for the non-radical oxidation of organic pollutants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Luxian Guo, Yangming Ding, Hua Wang, Yuxuan Liu, Qian Qiang, Qi Luo, Fei Song, Changzhi Li
Summary: In this article, a one-pot strategy was designed for the transformation of lignin beta-O-4 model compounds to imidazo[1,2-a]pyridines in high yields using 2-aminopyridine as a nitrogen source. The transformation involves cleavage of C-O bonds, sp(3)C-H bond oxidative activation, and intramolecular dehydrative coupling reaction. The synthesized imidazo[1,2-a]pyridines have the same structure skeleton as commercial drug molecules, highlighting the potential application of lignin derivatives in pharmaceutical synthesis.
Article
Chemistry, Physical
Yangyang Wang, Lei Wang, Yalei Zhang, Xuhui Mao, Wenbing Tan, Yali Zhang, Xiaoshu Wang, Ming Chang, Ruonan Guo, Beidou Xi
Summary: In order to enhance advanced oxidation processes (AOPs), bio-inspired iron-encapsulated biochar (bio-inspired Fe?BC) catalysts were prepared from iron-rich biomass of Iris sibirica L. The high performance of micro-electrolysis in degrading 2,4-DCP was attributed to the formation of Fe and austenite with strong electron carrier at 700 ?C.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Engineering, Environmental
Haoxi Dai, Ning Li, Jingya Ye, Jianhui Zhao, Xu He, Xiaoguang Duan, Beibei Yan, Guanyi Chen, Shaobin Wang
Summary: Recently, confined catalysts with large surface areas and adjustable pore and channel sizes have been used in advanced oxidation processes for water and wastewater treatment. In this review, the authors summarize the contaminant degradation behaviors in different confined catalytic systems, elaborate on the entire AOPs with confined catalysis, and provide suggestions and perspectives for the application of confined catalysis in AOPs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Shipeng Wu, Huimin Liu, Zhen Huang, Hualong Xu, Wei Shen
Summary: In this study, a facile solvent-thermal-reduction strategy was used to fabricate an O-vacancy-rich porous MnO2 nanosheet catalyst (MnO2-PS) for propane catalytic oxidation. The catalyst exhibited improved redox ability and oxygen activation capacity, which accelerated the oxidation of light alkanes. Additionally, the catalyst possessed highly accessible surface and high density of exposed active sites, facilitating the adsorption and activation of reactant molecules.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Hannah Milh, Xingyue Yu, Deirdre Cabooter, Raf Dewil
Summary: In this study, the efficiency of UV-based sulfate radical advanced oxidation processes (SR-AOP) and UV-based advanced reduction processes (ARP) in degrading ciprofloxacin (CIP) in wastewater was investigated. It was found that the UV/PS process was more efficient than the UV/PMS process in SR-AOPs, while the UV/sulfite process was the most efficient among ARPs. The optimal process parameters and the contribution of different reactive species were determined for each process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Ismael F. Mena, Elena Diaz, Juan J. Rodriguez, Angel F. Mohedano
Summary: Ionic liquids have exceptional properties but can cause environmental harm due to their high solubility in water. Cost-effective solutions are needed to deal with these pollutants, with advanced oxidation processes being an effective technology to remove them.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Md. Mahmudul Hassan Mondol, Chul-Ung Kim, Chang Min Kim, Sung Hwa Jhung
Summary: ZrO2 supported on porous N-doped carbon (ZrO2@CN) with oxygen vacancy was prepared via carbonization of a composite of metal-azolate framework (MAF-6) and zirconium chloride (ZrCl4). The catalyst, ZrO2(2)@CN, exhibited high activity in oxidative desulfurization (ODS) with good recyclability, attributed to the effective production of & BULL;OH species through the synergy between Zr atom with O vacancy and N of carbon support for H2O2 activation. Therefore, ZrO2, especially ZrO2@CN with oxygen vacancy, can be suggested as a promising ODS catalyst.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Environmental Sciences
Eva Domingues, Eryk Fernandes, Joao Gomes, Rui C. Martins
Summary: Pork production generates wastewater with high pollutant load and the intensive use of pharmaceuticals leads to effluents rich in these compounds. Traditional biological depuration treatments are effective on organic load removal but are time-consuming and inefficient on abating persistent contaminants like pharmaceutical compounds, necessitating the pursuit of alternative technologies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Organic
Emil Johansson, Remi Caraballo, Mikael Elofsson
Summary: This paper describes the synthesis of 4-O-alkyl analogues of N-acetylneuraminic acid (Neu5Ac) and the scope of the reaction. It demonstrates that activated alkyl halides and sulfonates, as well as primary alkyl iodides, can give products in useful yields. The utility of the methodology is exemplified using a specific example of synthesizing a 4-O-alkyl DANA analogue. These results expand the toolbox of Neu5Ac chemistry and have value in drug discovery and the study of Neu5Ac lectins biology.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Environmental Sciences
Zia Ul Haq Khan, Noor Shad Gul, Sana Sabahat, Jingyu Sun, Kamran Tahir, Noor Samad Shah, Nawshad Muhammad, Abdur Rahim, Muhammad Imran, Jibran Iqbal, Taj Malook Khan, Syed Khasim, Umar Farooq, Jianbo Wu
Summary: This review assesses the effectiveness of Advance Oxidation Process (AOPs) in eradicating organic pollutants and provides some suggestions for its advancement. AOPs are a process intensification method for wastewater treatment that generates hydroxyl and sulfate radicals for oxidation. The combination of AOPs with ozone or UV treatment has been shown to be highly effective for wastewater treatment.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)