Article
Chemistry, Applied
Jia Su, Xiangguang Guo, Yun Gao, Shan Wu, Ruigao Xu, Xiaoqi Sun
Summary: Ion-absorbed rare earth ores radioactive residues (IREORR) are difficult to dispose of, but they contain relatively high concentrations of REEs, making them a valuable resource. A novel process has been developed for the separation of thorium and recovery of REEs from IREORR hydrochloric acid leachate.
JOURNAL OF RARE EARTHS
(2021)
Article
Environmental Sciences
Liqing Li, Chenhao Liu, Hepeng Zhang, Bin Huang, Bing Luo, Chao Bie, Xiaoqi Sun
Summary: This study successfully achieved impurities removal and enrichment of rare earth elements in ion-adsorbed type rare earth ore by using specific materials. The method reduces the loss rate of rare earth elements and improves product purity, while also benefiting environmental protection and resource recycling.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Chemical
Somayeh Dashti, Farzaneh Sadri, Sina Shakibania, Fereshteh Rashchi, Ahmad Ghahreman
Summary: This study investigated the synergistic effect of Cyanex 572 mixed with TBP on the extraction and separation of heavy rare earth elements erbium and terbium. The results showed that the mixture of 25% TBP + 75% Cyanex 572 could extract about 70% of erbium and 85% of terbium at pH 1.5, demonstrating effective separation.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Somayeh Dashti, Sina Shakibania, Fereshteh Rashchi, Ahmad Ghahreman
Summary: This study investigated the solvent extraction of different groups of rare earth elements (LREE, MREE, and HREE) from a chloride medium using a mixture of Cyanex 572 and Alamine 336. The results showed that the addition of Alamine 336 to Cyanex 572 increased the extraction efficiency of LREEs and MREEs. The analysis suggested that Alamine 336 acted as a proton ion extractor and phase modifier for REECl2+ complexes.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Hao Su, Shuainan Ni, Chenhao Liu, Xiaoqi Sun
Summary: In this study, four fatty acid-based ionic liquids were synthesized to remove aluminum impurities in ion-adsorption rare earth ores. One specific ionic liquid, [methyltrioctylammonium][neodecanoate], showed better extraction and separation performance for aluminum. A process combining fractional extraction and extraction-precipitation was developed to remove impurity ions in the leaching solution of magnesium sulfate and achieve high concentration rare earth chloride product with high purity.
MINERALS ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Ebrahim Allahkarami, Bahram Rezai, Rama Rao Karri, Nabisab Mujawar Mubarak
Summary: This study investigated the extraction of cerium (Ce (III)) from nitrate media by Cyanex 572 and developed predictive models based on intelligent techniques. The results showed that pH was the most influential parameter on cerium extraction efficiency.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Chemical
Somayeh Dashti, Sina Shakibania, Fereshteh Rashchi, Ahmad Ghahreman
Summary: The binary mixture of Ionquest 801 and Cyanex 572 showed a significant synergistic effect in the solvent extraction and separation of rare earth elements in a chloride solution. This led to improved extraction efficiencies of heavy rare earth elements, as well as enhanced selectivity in separating different rare earth elements. By optimizing the conditions, the extraction of Er3+ and Tb3+ reached high percentages, while the extraction efficiencies of LREEs and MREEs were also enhanced compared to individual extractants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Alok Kumar Nayak, Niharbala Devi, Kadambini Sarangi
Summary: This study investigated the extraction of Mo(VI) and V(V) from the simulated leach liquor of hydrodesulfurization spent catalyst using Cyanex 572 as the extractant. Different pH conditions affected the extraction rates of Mo(VI) and V(V). Adjusting the H2SO4 concentration and Cyanex 572 concentration could modulate the extraction efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
V. V. Belova, Yu Tsareva, A. E. Kostanyan
Summary: This study investigates the extraction of rare-earth elements using a Cyanex 572 extractant from chloride solutions in hexane-propanol-water ternary systems. The results show that the component ratio has a significant impact on the partition coefficients and separation factors of the REEs. Additionally, an increase in the aqueous-phase acidity negatively affects the extraction of REEs.
THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Weiguo Pan, Li Chen, Yitan Wang, Yongsheng Yan
Summary: The study focused on the application of Y ion-imprinted electrospun membranes (Y-IIEMs) for the treatment of low-concentration rare earth wastewater. By applying high efficient ligand-inducing and aqueous phase ion-imprinting, effective separation of heavy rare earth ion Y (III) was achieved, demonstrating good stability and reuse performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Shan Wu, Chao Bie, Hao Su, Yun Gao, Xiaoqi Sun
Summary: Two novel salicylic acid derivatives, OOBA and EHOBA, were synthesized for the extraction and separation of Y from ion adsorbed rare earth ores. The study found that OOBA exhibits similar extraction behavior to LREEs and has better selectivities for Y and other HREEs compared to common carboxylic acids. The extraction mechanism of OOBA was determined to be cation exchange. Furthermore, OOBA demonstrated advantages such as low stripping acid concentration, good cycle stability, and minimal loss in the extraction process. A simulated fractional extraction process was developed to separate Y from the Y-enriched HREEs feed liquid, resulting in a Y product with high purity and yield.
MINERALS ENGINEERING
(2022)
Article
Chemistry, Applied
Qiang He, Jiang Qiu, Jinfa Chen, Miaomiao Zan, Yanfei Xiao
Summary: This paper analyzes the impurity removal and green enrichment technologies for rare earth elements in the leaching process of rare earth ores, and proposes an efficient and environmentally friendly approach for the recovery of rare earth elements, addressing the issues of losses and pollution.
JOURNAL OF RARE EARTHS
(2022)
Article
Geochemistry & Geophysics
Ilhwan Park, Yuki Kanazawa, Naoya Sato, Purevdelger Galtchandmani, Manis Kumar Jha, Carlito Baltazar Tabelin, Sanghee Jeon, Mayumi Ito, Naoki Hiroyoshi
Summary: Global demand for rare earth elements is expected to increase, especially for renewable energy and clean storage technologies. This study successfully upgraded low-grade rare earth ore from the Khalzan Buregtei deposit in Mongolia using magnetic separation techniques.
Article
Metallurgy & Metallurgical Engineering
N. P. Dushyantha, N. P. Ratnayake, H. M. R. Premasiri, I. M. S. K. Ilankoon, P. V. A. Hemalal, C. L. Jayawardena, Rohana Chandrajith, L. P. S. Rohitha, A. M. K. B. Abeysinghe, D. M. D. O. K. Dissanayake, P. G. R. Dharmaratne, A. S. Ratnayake, N. M. Batapola
Summary: The study investigates the potential of lake sediments around the Eppawala Phosphate Deposit in Sri Lanka as a secondary source of rare earth elements (REEs). Experimental results reveal three fractions of REEs in lake sediments and identify the optimal leaching conditions for ion-adsorbed fraction. Acid leaching is proven to be the most effective leaching process for extracting REEs from the sediments, providing valuable insights for assessing low-grade geological resources in similar geological settings.
Article
Metallurgy & Metallurgical Engineering
Arsyad Maulana Dzulqornain, Ana Belen Cueva-Sola, Kyeong Woo Chung, Jin-Young Lee, Rajesh Kumar Jyothi
Summary: This study presents a hydrometallurgical process for the separation of light rare earth elements (LREEs) using oxidation, precipitation, solvent extraction, and stripping techniques. Selective oxidation with potassium permanganate was employed for the separation of cerium (III). Solvent extraction with Cyanex 572 and cross-current scrubbing were used to achieve the separation of lanthanum (III) from neodymium (III) and praseodymium (III).
Article
Chemistry, Applied
Gaoshan Yu, Zhiyuan Zeng, Yun Gao, Shuainan Ni, Hepeng Zhang, Xiaoqi Sun
Summary: This article studied the separation of aluminum (Al) and rare earth (RE) elements using the carboxylic acid extractant 4-octyloxybenzoic acid (POOA) from ion adsorbed RE ores. The extraction and separation performance of POOA in chloride system was systematically studied by changing parameters such as pH value, temperature, solvent, and saponification degree. The results showed that POOA had a good separation effect on Al and RE, and it achieved better phase separation compared to easily emulsified naphthenic acid. The developed extraction system can be almost completely stripped under the condition of low concentration stripping acid.
JOURNAL OF RARE EARTHS
(2023)
Article
Engineering, Chemical
Hao Su, Shuainan Ni, Chao Bie, Shan Wu, Xiaoqi Sun
Summary: This article introduces the application of a new ionic liquid [N-1888][NDA] in the separation of rare earth elements. By studying its extraction capacity, stripping property, and recycling stability, an efficient separation process for yttrium was developed. The experimental results showed that this process has a high separation factor and can produce high-purity yttrium without the use of salting-out reagents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Zhiyuan Zeng, Yun Gao, Chenhao Liu, Xiaoqi Sun
Summary: In this article, a novel functionalized ionic liquid was developed for the removal of aluminum impurity from ion-adsorbed type RE ores leaching solution. The ionic liquid exhibited high selectivity and efficient removal of aluminum, while maintaining a high recovery rate of RE. This research provides valuable insights into the efficient and sustainable removal of aluminum impurity from actual RE leaching solution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Luo Feng, Liqing Li, Meiqi Zhang, Yijie Yang, Xiaoqi Sun
Summary: A series of polychromatic pigments were synthesized and characterized for their near-infrared reflectance properties, showing color changes with different element doping. Doping of rare earth elements can control the color of the pigment, and the samples exhibit excellent thermal insulation properties.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Zeyuan Zhao, Shuainan Ni, Hailan Zhi, Hepeng Zhang, Xiang Su, Xiaoqi Sun
Summary: A two-step reduction method was used to prepare the positive charge modified two-step reduced graphene oxide (TS-rGO) membrane, which addressed the issues of water swelling and low ion selectivity of the graphene oxide (GO) membrane. The modification of stable polyamino molecules onto GO enhanced ion selectivity and maintained the stability of the interlayer channel. The TS-rGO membrane exhibited high ion selectivity, high permeability to low-valent ions, and high water flux as a result of the successful modification of positive charge.
Article
Materials Science, Ceramics
Meiqi Zhang, Yijie Yang, Luo Feng, Xiaoqi Sun
Summary: A near infrared reflective inorganic pigment YIn1-x-yMnyFexO3 (x/y = 0.1-0.5) was prepared and showed a change in phase and color with the increase of iron content. The black pigment exhibited high near infrared reflectivity and good chemical stability, making it promising for energy conservation applications.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Yun Gao, Jia Su, Chao Bie, Yamin Dong, Zhiyuan Zeng, Xiaoqi Sun
Summary: In order to effectively separate yttrium from rare-earth elements, researchers developed a novel ionic liquid [N-1888]-[POPA]. This ionic liquid achieved efficient separation of heavy rare-earth elements and yttrium through ion association, thus avoiding the generation of saponification wastewater. The fractional extraction process based on [N-1888]-[POPA] exhibited satisfying performance, resulting in an increase in yttrium purity from 85.2% to 99.1% through nine extraction stages and six scrubbing stages.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Engineering, Chemical
Shuainan Ni, Guisu Yu, Yun Gao, Sijia Zhang, Hao Su, Xiaoqi Sun
Summary: This paper reports a novel strategy for separating Al3+ and Gd3+ based on hydrophobic deep eutectic solvent (HDES). The results show that HDES can effectively remove Al3+ from GdCl3 solution, with good separation performance and high purity of GdCl3 product.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ditang Mo, Guisu Yu, Zhiyuan Zeng, Shuainan Ni, Sijia Zhang, Xiaoqi Sun
Summary: The recovery of valuable metals from spent lithium-ion batteries (LIBs) using sec-octylphenoxyacetic acid (CA-12) was investigated in this study. Optimized conditions resulted in a 99% co-extraction rate of nickel, cobalt, and manganese to the organic phase, with only 7% lithium loss. The leaching efficiency of all components in the spent LIBs powder was greater than 95%. After two-stage extraction, the total extraction efficiencies of nickel, cobalt, and manganese reached 99.7%, 99.4%, and 98.45%, respectively. The recovered lithium purity was 97.7% after precipitation with saturated Na2CO3. These results highlight the potential application prospects of CA-12 for the recovery of critical metals from spent LIBs.
Article
Engineering, Environmental
Shuainan Ni, Yun Gao, Guisu Yu, Sijia Zhang, Zhiyuan Zeng, Xiaoqi Sun
Summary: In this study, new hydrophobic deep eutectic solvents (HDESs) were used to selectively enrich trace Th from radioactive waste leach solution. These HDESs showed exceptional selectivity for Th extraction, along with high loading capacity and easy stripping. A short flow closed-loop recovery process was developed to efficiently extract Th from the leach solution of radioactive waste residue.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Sijia Zhang, Shuainan Ni, Zhiyuan Zeng, Ditang Mo, Bin Huang, Xiaoqi Sun
Summary: In this study, the synergistic effect between lauric acid (LA) and primary amine N1923 (RNH2) was investigated for the saponification of acidic extractant. The LA-RNH2 extraction system showed high extraction and separation performance in recovering Sm and Co from SmCo magnets. This research provides a novel strategy for the saponification of acidic extractants and has potential applications in metal recovery processes.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Hao Su, Shuainan Ni, Chenhao Liu, Xiaoqi Sun
Summary: In this study, four fatty acid-based ionic liquids were synthesized to remove aluminum impurities in ion-adsorption rare earth ores. One specific ionic liquid, [methyltrioctylammonium][neodecanoate], showed better extraction and separation performance for aluminum. A process combining fractional extraction and extraction-precipitation was developed to remove impurity ions in the leaching solution of magnesium sulfate and achieve high concentration rare earth chloride product with high purity.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Zhiyuan Zeng, Yun Gao, Shuainan Ni, Sijia Zhang, Xinyu Fu, Xiaoqi Sun
Summary: This study developed novel ionic liquids (ILs) and evaluated their effectiveness in recovering thorium (Th) and rare earth (RE) from waste residue leaching solution (WRLS). The difunctionalization of the ILs cation provided more coordination sites and achieved higher extraction and separation performance. [OB2DTA][CA12] was capable of extracting 99.0% of Th and only 0.4% of RE, with a Th/RE separation factor of 22114. This research provides a recyclable separation strategy for the treatment of ion-adsorbed rare earth ore (IATREO) waste residue, simplifying the separation process and reducing chemical consumption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bin Huang, Sijia Zhang, Shuainan Ni, Chunlin Ye, Youlin Wang, Xiaoqi Sun
Summary: YCl3 was used as a leaching agent to recover RE from ion-adsorbed RE minerals, demonstrating excellent potential to replace (NH4)2SO4. The leaching efficiency decreased with the order Y3+>Mg2+>NH4+ and increased with the concentration of the leachant. At a concentration of 0.01 mol/L, YCl3 achieved a higher leaching rate compared to Mg2SO4. The optimum conditions for column leaching were determined to achieve a maximum leaching efficiency of non-Y RE as 100%.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Bing Luo, Shuainan Ni, Xinyu Fu, Xiaoqi Sun
Summary: This paper investigates the synergistic extraction performance of Scandium using a mixture of Cyanex572 and Cyanex923 in sulfuric acid medium. The best synergistic effect is achieved when the pH value of the aqueous phase is 2 and the mole fraction of Cyanex572 is 0.5, with a synergy coefficient value R of 4.78. The extracted complex is determined to be [Sc(SO4)0.5(HL2)2B2] by slope analysis. The loaded Scandium can be stripped within two times by 2 mol/L sulfuric acid with a stripping efficiency of 99.4 %. This synergistic system demonstrates potential application in the separation of Scandium from the leachate of laterite nickel ore.
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)
