Article
Chemistry, Physical
Yuqing Ren, Yao Chen, Qinyu Li, Hexing Li, Zhenfeng Bian
Summary: This study investigates the promotion effect of microwave-absorbing photocatalysts on the photocatalytic oxidation process. The results show that the thermal effect of the microwave field enhances the separation efficiency of photogenerated electrons and holes, while the athermal effect improves the light absorption rate of the catalyst and promotes the generation of reactive oxygen radicals. These findings provide a theoretical foundation for practical applications.
Article
Engineering, Environmental
Tangtong Ju, Yue Dai, Hailong Tang, Meiling Wang, Xiao Sun, Min Wang, Yongqing Ma, Ganhong Zheng
Summary: This study presents a method for the photocatalytic conversion of CH4 to C1 oxygenated products using a catalyst composed of CNTs-Ni@TiO2 NCs. The use of H2O2 as an oxidant allows for high yields and selectivity of C1 oxygenated products at 30 degrees C. The superior photocatalytic performance is attributed to the synergistic effects of TiO2 NCs, Ni species, and CNTs, including enhanced visible light absorption, improved electron/hole separation and charge transfer property, and lowered C-H bond cleavage energy required for CH4 activation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Shuting Tian, Yi He, Liyun Zhang, Shuangshuang Li, Yang Bai, Yuqi Wang, Jingcheng Wu, Jing Yu, Xiao Guo
Summary: An anti-fouling polymeric membrane (CPEN) was designed and fabricated by assembling CNTs-COOH and TiO2 via ultrasound, self-assembly, and calcination methods. The membrane showed excellent selective wettability, robust mechanical property, outstanding thermal stability, and remarkable resistance to acid, alkali, salt, and solvent. With the addition of CNTs/TiO2 layer, efficient separation of surfactant-free and surfactant-stabilized oil-in-water emulsions was achieved, along with self-cleaning and continuous purification of dyes/oil emulsions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Hoang Phuong Nguyen, Thi Minh Cao, Tien-Thanh Nguyen, Viet Van Pham
Summary: In this study, traditional semiconductors are combined with carbon nanotubes to form composites with high photocatalytic oxidation performance, which shows great potential for NOx removal and flue gas treatment.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Chemical
Guizhen Zhang, Yingying Yu, Yi Tu, Yang Liu, Jintao Huang, Xiaochun Yin, Yanhong Feng
Summary: A photocatalytic membrane reactor made of ultra-high molecular weight polyethylene/inorganic particle was prepared using a melt-blending method. The reactor exhibited high porosity and loading capacity. It showed excellent catalytic efficiency, with the degradation rates of various organic dyes and hormone pollutants reaching over 96.6% within 60-80 minutes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Optics
Muidh Alheshibri, Khaled Elsayed, Shamsuddeen A. Haladu, Saminu Musa Magami, Abbad Al Baroot, Ismail Ercan, Filiz Ercan, Abdullah A. Manda, Emre cevik, T. S. Kayed, Aamerah A. Alsanea, Amjad Mujawwil Alotaibi, Amal L. Al-Otaibi
Summary: A simple and reproducible self-templating method was developed to synthesize silver nanoparticles decorated on CNTs/TiO2 nanocomposite using nanosecond pulsed laser ablation. The resulting nanocatalysts showed enhanced photocatalytic degradation of methylene blue dye contaminant. Morphology, heterostructure, and the nature of incorporation of the nanocomposite catalysts were confirmed by TEM and SEM microscopy. XRD analysis confirmed the crystalline nature of the nanocatalysts. PL analysis provided information about surface defects and electron-hole recombination properties of the prepared nanocatalysts. Efficient ultraviolet light-induced photodegradation of the dye was achieved using the TiO2/CNT and Ag/TiO2/CNT nanocomposite catalysts.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Environmental Sciences
Yuewei Yang, Kai Liu, Fengfei Sun, Yanyan Liu, Junfeng Chen
Summary: The carbon nanotubes-silver-modified-titanium dioxide (CNTs-Ag-TiO2, CAT) ternary composite, prepared by a mechanical mixing method, showed excellent treatment efficiency in printing and dyeing wastewater by possessing photocatalytic reaction sites and enhancing visible light utilization. The optimized ratio of CNTs: Ag and the doping amount of CNTs/Ag significantly improved the removal rate of Congo red wastewater within a short period of time.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Carmen Barquin, Aranza Vital-Grappin, Izumi Kumakiri, Nazely Diban, Maria J. Rivero, Ane Urtiaga, Inmaculada Ortiz
Summary: This study demonstrates the photocatalytic degradation of organic pollutants in water using TiO2 and TiO2/Ag membranes immobilized on ceramic porous tubular supports. The membranes showed high water fluxes and low rejection rates against model pollutants. The photocatalytic performance for the degradation of DCA was similar to suspended TiO2 particles, but significantly improved when the aqueous solution permeated through the pores of the photocatalytic membrane.
Article
Chemistry, Physical
Yinshan Xie, Xinning Wang, Hulin Li, Tao Wang, Wei Feng, Jian Li
Summary: Membrane separation is a widely used method for wastewater treatment. Polyacrylonitrile ultrafiltration membrane has excellent stability and properties. However, traditional cleaning methods are not effective for reducing fouling. Recent research suggests that combining ultrfiltration membranes with photocatalytic materials can solve membrane fouling issues. TiO2 nanoparticles were added to a casting solution to fabricate a composite ultrafiltration membrane with enhanced hydrophilicity and antifouling performance.
Article
Biochemistry & Molecular Biology
Md. Abu Hanif, Hyokyeong Shin, Danbi Chun, Hong Gun Kim, Lee Ku Kwac, Young Soon Kim
Summary: This study aims to remove harmful volatile organic compounds (VOCs) using as-prepared polypropylene membrane + TiO2 nanoparticles (PPM + TiO2 NPs) through photocatalytic gas bag method under UV light. The results confirm that PPM + TiO2 NPs material successfully degraded formaldehyde gas, with a 70% degradation rate within 1 hour of UV illumination.
Article
Chemistry, Multidisciplinary
Mathieu Grandcolas, Eloise Oudin
Summary: Photocatalytic membrane reactors are efficient for treating polluted waters, but the unilateral irradiation of the membrane is a major drawback. To overcome this issue, a reactor that can irradiate the membrane on both sides was developed. The results showed that the use of both sides of the photocatalytic membrane significantly enhanced the decolorization of methylene blue in water.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Ceramics
Haibei Tan, Yabin Zhang, Bowen Li, Hao Yang, Haitao Hou, Qinglin Huang
Summary: A polymer-glass flat membrane was prepared using the phase inversion casting method and TiO2 was coated on the surface of the membranes. The membrane was characterized and its photocatalytic degradation of methylene blue was investigated. The results showed that the membrane coated by three layers TiO2 sol exhibited the best photocatalytic degradation performance for methylene blue.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Lamine Aoudjit, Hugo Salazar, Djamila Zioui, Aicha Sebti, Pedro Manuel Martins, Senentxu Lanceros-Mendez
Summary: This study synthesized round-shaped Ag@TiO2 nanocomposites with a diameter of approximately 21 nm and a bandgap energy of 2.8 eV, which demonstrated good photocatalytic activity against metronidazole (MNZ) under solar radiation. The application of an adaptive neuro-fuzzy inference system (ANFIS) successfully predicted the effect of various parameters on the photocatalytic performance of the composite membrane, showing that the 10% Ag@TiO2/PVDF-HFP composite membrane achieved 100% removal efficiency for MNZ after 5 hours of solar radiation exposure.
Article
Engineering, Chemical
Jing Song, Yihan Li, Shihan Wang, Rui Han, Yu Ba, Ying Liu, Shengqiang Fan
Summary: The study developed a Membrane Electro-Bioreactor (MEBR) with fouling resistant and ammonia/nitrite removal functions. It was found that the cake layer EPS on the membrane surface was the main contributor to membrane fouling in MEBR. MEBR played an important role in alleviating membrane fouling and enhancing the removal of ammonia and nitrite.
Article
Nanoscience & Nanotechnology
Andjelika Bjelajac, Ileana Florea, Mihai Zamfir, Sandrine Tusseau Nenez, Costel Sorin Cojocaru
Summary: In this study, vertically aligned multiwall carbon nanotubes (CNTs) films were used as support for ZnO/ZnS photocatalytic active nanostructures. The CNTs were synthesized using a hot-filament chemical vapor deposition (HfCVD) method. Point defects in the CNTs outer walls were created using a low pressure nonthermal water vapors diffusive plasma, and Zn nanoparticles were subsequently electrodeposited onto the CNTs. The samples were annealed to obtain ZnO, ZnS, and a mix phase of ZnO/ZnS. The absorption of ZnO was enhanced by S doping and involvement of CNTs, and the ZnO1-xSx@CNTs heteronanostructure showed the highest photocatalytic activity for methyl blue dye degradation among the studied samples.
Article
Multidisciplinary Sciences
Xueling Wang, Qiang Lyu, Tiezheng Tong, Kuo Sun, Li-Chiang Lin, Chuyang Y. Tang, Fenglin Yang, Michael D. Guiver, Xie Quan, Yingchao Dong
Summary: The study introduces an intra-crystalline defect engineering strategy to design a high-performance stable metal-organic framework membrane for effective treatment of hypersaline waters, achieving both excellent salt rejection and high water flux. Molecular dynamics simulations reveal the positive role of defects in enhancing structural hydrophilicity and enabling ultra-fast water transport, paving the way for the rational design of next-generation MOF membranes with enhanced permeation performance.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Xueyang Zhao, Kun Zhao, Yanming Liu, Yan Su, Shuo Chen, Hongtao Yu, Xie Quan
Summary: In this study, a diatomic electrocatalyst with nitrogen-doped porous carbon-anchored homonuclear Fe2N6 sites was prepared for efficient CO2 reduction to CO. The catalyst exhibited high CO Faradic efficiency and low Tafel slope compared to single-atom Fe catalyst. Density functional theory calculations revealed that the neighboring Fe-Fe centers in the Fe2N6 site facilitated CO2 activation and decreased the reaction barrier for CO desorption.
Article
Engineering, Environmental
Jiajian Xing, Haiguang Zhang, Gaoliang Wei, Lei Du, Shuo Chen, Hongtao Yu, Xie Quan
Summary: By incorporating molybdenum sulfide (MoS2) nanosheets and applying external electrical assistance, both the 2D channel and charge density of reduced graphene oxide (rGO) membranes were regulated to enhance water flux and salt rejection. The resulting rGO/MoS2 membranes exhibited expanded nanochannels, resulting in significantly increased water permeance. In addition, the high capacitance and negative potential of the membranes contributed to improved rejection rates for NaCl and Na2SO4 ions. This study provides new insights for the design of membranes with high water flux and salt rejection efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Peike Cao, Xie Quan, Xiaowa Nie, Kun Zhao, Yanming Liu, Shuo Chen, Hongtao Yu, Jingguang G. G. Chen
Summary: The authors report a scalable cobalt single-site catalyst for hydrogen peroxide synthesis at industrial-relevant currents in acidic, neutral or alkaline electrolyte, providing a sustainable alternative to traditional anthraquinone technology.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Xinfei Fan, Gaoliang Wei, Xie Quan
Summary: Membrane separation is widely used in water and wastewater treatment due to its cost-effectiveness, ease of operation, and high efficiency. However, current membranes face challenges in balancing selectivity and permeability, as well as dealing with membrane fouling. Recent studies have focused on developing high-performance membranes based on carbon nanomaterials, such as carbon nanotubes and graphene, to improve water and wastewater treatment. These carbon nanomaterial-based membranes demonstrate enhanced permselectivity and fouling resistance under electrochemical assistance, thanks to their good electrical conductivity. This review summarizes the progress in the preparation, mechanisms, and applications of electroconductive nanocarbonaceous membranes for water purification and wastewater treatment, aiming to enhance the fundamental understanding of combining membrane separation and electrochemistry. The review covers methods for preparing electroconductive membranes, such as carbon nanotube membranes and graphene membranes, as well as the underlying mechanisms for the improved permselectivity, antifouling, and regeneration performance achieved through electrochemical processes. The review also discusses practical limitations of membrane/electrochemistry systems and proposes possible solutions.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Chemistry, Physical
Lanlan Liang, Peike Cao, Xin Qin, Shuai Wu, Haokun Bai, Shuo Chen, Hongtao Yu, Yan Su, Xie Quan
Summary: Developing efficient and interference-tolerant catalysts for practical use in catalytic ozonation process is challenging. In this study, a surface Vo-rich catalyst was prepared by doping Co into zinc ferrite spinel, showing efficient mineralization of recalcitrant organic pollutants. The removal of contaminants was mainly attributed to nonradical-based oxygen species, *O, rather than traditional hydroxyl radicals, •OH. The Vo-driven nonradical catalysis exhibited high resistance to coexisting ions and excellent performance in actual wastewater treatment, providing a novel strategy for efficient mineralization of pollutants in complicated water matrices.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Xueyang Zhao, Qin Geng, Fan Dong, Kun Zhao, Shuo Chen, Hongtao Yu, Xie Quan
Summary: Electrochemically reducing nitrate to ammonia is an efficient method to address nitrate pollution. However, controlling the selectivity and kinetics of ammonia production remains a challenge. In this study, a single-atom Cu catalyst was developed for selective and efficient nitrate reduction, achieving high Faradic efficiency and ammonia selectivity. DFT calculations revealed the underlying mechanism, demonstrating the superiority of the single-atom Cu catalyst over Cu nanoparticle catalyst. This research provides a strategy for designing electrocatalysts for efficient and selective ammonia production via nitrate reduction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xin Qin, Peike Cao, Xie Quan, Kun Zhao, Shuo Chen, Hongtao Yu, Yan Su
Summary: In this study, a dual-atomic-site catalyst (CoFe DAC) was proposed to cooperatively catalyze middotOH electrogeneration. The CoFe DAC showed higher middotOH production rate compared to single-site catalysts, and it was more energy-efficient for coking wastewater treatment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Gaoliang Wei, Lei Du, Haiguang Zhang, Jiajian Xing, Shuo Chen, Xie Quan
Summary: In this study, it was found that electrochemical treatment can expand the restacked regions of reduced graphene oxide (rGO) membranes, leading to the formation of ultrafast water transport nanochannels. The expansion is driven by hydrogen bond interactions between water molecules and electrochemically produced hydroxyl groups on the edges of rGO nanosheets. The treated rGO membranes exhibit a permeance 2 orders of magnitude higher than pristine rGO membranes and about 3 times higher than graphene oxide membranes. Additionally, the rGO membranes also show higher ionic/molecular rejection performance due to their smaller average pore size.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Hai-Guang Zhang, Xie Quan, Lei Du, Gao-Liang Wei, Shuo Chen, Hong-Tao Yu, Ying-Chao Dong
Summary: Researchers propose an electropolarization strategy using vertically aligned reduced graphene oxide (VARGO) membrane to regulate interfacial hydrogen-bond and electrostatic interactions, achieving high water permeation and ion rejection performance.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Engineering, Environmental
Qilin Yu, Haohao Mao, Zhiqiang Zhao, Xie Quan, Yaobin Zhang
Summary: As a major driver of global methane production, methanogens are exposed to an environment filled with dynamic electromagnetic waves, which may induce electromotive force (EMF) to potentially influence methanogen metabolism. This study found that exposure to a dynamic magnetic field increased biogas production through induced EMF. The methane emissions from sediments increased by 41.71% when exposed to a dynamic magnetic field with an intensity of 0.20 to 0.40 mT. The EMF accelerated the respiration of methanogens and bacteria, leading to enhanced microbial metabolism.
Article
Chemistry, Multidisciplinary
Muhammad Irfan Ahmad, Shuo Chen, Hongtao Yu, Xie Quan
Summary: This study demonstrates the successful production of H2O2 by introducing reduced graphene oxide (rGO) into SnO2, which enhanced light absorption and reduced the energy band gap. Among different concentrations of rGO, 0.5wt% rGO-SnO2 showed the highest H2O2 yield. The findings provide valuable guidance for designing efficient photocatalysts for H2O2 generation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Chengyu Yuan, Yuxin Li, Lulu Qian, Jiajian Xing, Xu Wang, Haiguang Zhang, Lei Du, Gaoliang Wei, Shuo Chen, Xie Quan
Summary: This study presents a molten salt intercalation method for the fabrication of an Al3+-intercalated MXene membrane with good antiswelling ability. The intercalated membrane shows significant increase in the Al-O group and Al content, while in situ XRD tests confirm the stability of d-spacing with Al3+ intercalation. The membranes demonstrate excellent separation efficacy for organic dyes and antibiotics with rejection rates exceeding 90%.
ACS ES&T ENGINEERING
(2023)
Article
Engineering, Environmental
Yanping Shi, Tao Liu, Xie Quan, Shuo Chen, Hongtao Yu, Wuzhe Quan
Summary: A municipal WWTP upgraded its process to A2O-IFFAS by filling ZVI-modified biofilm carriers into anoxic bioreactors and clinoptilolite-modified biofilm carriers into aerobic bioreactors. The upgraded process achieved high nitrogen removal efficiency and met the discharge standard requirements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Shuai Wu, Xie Quan
Summary: This article introduces the basic mechanism of photocatalytic H2O2 production from O2 reduction and proposes universal strategies and design principles to enhance the performance of photocatalytic H2O2 production. The article also presents the prospects and suggestions for the future development of photocatalytic H2O2 production.
ACS ES&T ENGINEERING
(2022)
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)
