Article
Environmental Sciences
Hejun Ren, Yuhang Bi, Fangyuan Liu, Chunpeng Zhang, Nan Wei, Lujian Fan, Rui Zhou
Summary: This study investigates the degradation mechanism of ofloxacin (OFX) removal through electro-oxidation (EO) and evaluates the biological toxicities of the intermediates. After optimizing the operating parameters, OFX is almost completely degraded with high energy efficiency. The proposed method emerges as a viable treatment scheme for similar polluted wastewaters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Bei Ye, Ziye Liu, Xiaoqin Zhu, Hanjing Wu, Zifan Liang, Wenlong Wang, Qianyuan Wu, Hongying Hu, Xinhao Zhang
Summary: Chlorination is a widely used method for water disinfection, and ammonia/chlorine co-exposure can have a synergistic effect on the degradation of atrazine (ATZ), involving the formation of hydroxyl radicals (OH) and reactive chlorine species.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Electrochemistry
Alejandro Medel, Marlon C. Gonzalez, Jesus Trevino-Resendez, Yunny Meas, Zaira I. Bedolla-Valdez, Linda R. Lara-Jacobo, Gabriel Alonso-Nunez, Erika Mendez
Summary: The effect of UVC light on chlorine generation in three wastewater treatment processes was studied for carwash wastewater disinfection and mineralization. Electrocoagulation, electrooxidation, and catalysis were sequentially performed with and without UVC radiation. Toxicity changes were detected using Artemia salina, with the LD50 improving from 13.4 to 52.1 in the photoEC process. Disinfection trials showed a 90% decrease in colony-forming units, but only a 7% mineralization degree. Electrooxidation with the IrO2-RuO2 anode produced the highest concentration of active chlorine species, while UVC irradiation was more efficient in producing (OH)-O-center dot radicals. The combined photoelectrocoagulation and photoelectrooxidation achieved a 57% total organic carbon abatement, and photocatalysis with TiO2 reached 80% mineralization at the end of the protocol. The sequential UVC-based treatments were proposed to degrade organic matter and reduce pathogens in carwash wastewater with chloride ions.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Engineering, Environmental
Zhang Yan, Wenjian Kuang, Yu Lei, Wenxiao Zheng, Hengyi Fu, Han Li, Zhenchao Lei, Xin Yang, Shishu Zhu, Chunhua Feng
Summary: This study develops a wet chemistry approach to synthesize BiOCl-functionalized MMO electrodes for electrochlorination of ammonium in wastewater treatment. The BiOCl@MMO anode exhibits higher chlorine generation, Faradaic efficiency, and NH4+ oxidation rate compared to the pristine MMO anode.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Environmental Sciences
Huiling Xia, Chengwei Li, Guoying Yang, Zhiang Shi, Chenxi Jin, Wenzhi He, Jingcheng Xu, Guangming Li
Summary: This paper provides a detailed classification and comprehensive review of microwave-assisted advanced oxidation processes (MW-AOPs) in wastewater treatment. The latest applications of microwave in different advanced oxidation systems are discussed, along with the discussion of reaction parameters, performance, and operating costs of MW-AOPs. Recommendations for future research on MW-AOPs are also provided, highlighting the potential development and evolution of this technology.
Article
Environmental Sciences
Aref Shokri, Bahram Nasernejad, Mahdi Sanavi Fard
Summary: The efficiency of heterogeneous electro-Fenton technology in degrading recalcitrant organic pollutants in wastewater is highly evident. This green technology has gained significant attention from wastewater treatment research communities due to its outstanding performance, eco-friendliness, and wide operability. The article discusses the mechanism of the electro-Fenton process, the properties of efficient catalysts, and the challenges hindering its commercialization. It proposes future research directions and concludes that addressing those gaps will make the commercialization of electro-Fenton technology a realistic goal.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Engineering, Environmental
Sin-Yi Liou, Michael C. Dodd
Summary: The reaction of hypochlorous acid with superoxide radical can be a novel nonphotochemical advanced oxidation process, generating hydroxyl radical and various reactive chlorine species, with high radical exposures, simplicity, rapid time-scales, and potential for on-site superoxide generation.
Article
Chemistry, Multidisciplinary
Vishal Kumar Sandhwar, Diksha Saxena, Shilpi Verma, Krishan Kishor Garg, Basheshwar Prasad
Summary: This study compares the performance of EF and EO methods in removing COD from synthetic petrochemical wastewater, finding that EF achieved a COD removal rate of 66.23% while EO achieved a rate of 56.57% under optimal conditions.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Shiwei Xie, Chang Li, Peng Liao, Jingfu Wang, Jingan Chen, Ao Qian, Yan Zhang, Taoyuan Wei, Dong Cheng, Mengqi Jia
Summary: Iron electrocoagulation is an effective method for water purification, and recent studies have shown that it can produce hydroxyl radicals (OH-) for the oxidation of organic contaminants. However, the mechanism of OH- production in bicarbonate electrolyte is still unclear. This study found that OH- was produced during iron electrocoagulation in bicarbonate electrolyte under pH-neutral conditions, with the highest yield observed at pH 8.5. The presence of Fe(II) and lepidocrocite were also found to play a role in enhancing OH- production. A kinetic model was developed to describe the production of OH-, Fe(II) oxidation, and contaminant degradation processes in iron electrocoagulation. These findings expand the functionality of electrocoagulation and provide insights for the development of sustainable water purification technology.
Article
Engineering, Environmental
Dongbao Song, Biting Qiao, Xin Wang, Leicheng Zhao, Xiao Li, Peng Zhang, Yiming Yao, Hao Chen, Lingyan Zhu, Hongwen Sun
Summary: This study provides new insight into the degradation of PFOA by an electrochemical system in the presence of reactive chlorine species (RCS) and distinguishes the roles played by reactive chlorine species and hydroxyl radical. By using electrochemical oxidation in the presence of NaCl, PFOA degradation rates of 89.4%-94.9% and defluorination rates of 38.7%-44.1% were achieved after 480 min. The study revealed that the degradation occurred via the synergistic effect of hydroxyl radical and reactive chlorine species rather than through direct anodic oxidation. The findings are promising for the development of electrochemical technology to remove perfluorinated alkyl substances from the environment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Mingxue Li, Zexiu An, Yanru Huo, Jinchan Jiang, Yuxin Zhou, Haijie Cao, Maoxia He
Summary: This study investigated the reaction mechanisms between brominated contaminants and different oxidants in chlorine-based AOPs and simulated their degradation kinetics under different conditions. The results showed that hydrogen peroxide, chlorine, and chloramine were effective oxidants for removing brominated contaminants.
Article
Chemistry, Analytical
Ana A. Marquez, Oscar Coreno, Jose L. Nava
Summary: This paper presents a novel process combining electrocoagulation and active chlorine-based photoelectro-Fenton-like methods for removing Acid Blue 29 dye from synthetic water. The study demonstrates that under specific process conditions, this combined process shows promising results in terms of bleaching and COD removal.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Chemical
Isbath Sanni, M. R. Karimi Estahbanati, Anne Carabin, Patrick Drogui
Summary: The combination of EC and EO processes effectively treated highly contaminated industrial wastewater by using EC as a pre-treatment to remove phosphate ions and EO for COD removal, meeting the sewer discharge standard and reducing operating costs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Elif Durna, Nevim Genc
Summary: The study investigated the treatment of car wash wastewater using radical based processes, with the preference order for treatment efficiency found as (MW + EC + PS) > (MW + O-3 + PS) > (O-3 + EC + PS).
ENVIRONMENTAL ENGINEERING RESEARCH
(2021)
Article
Environmental Sciences
Zehong Chen, Pan Xia, Dazhi Wang, Xiaodong Niu, Lixin Ao, Qiang He, Sha Wang, Zhihong Ye, Ignasi Sires
Summary: This study discusses the role of active chlorine and Fe(IV)-oxo species (FeIVO2+) as primary oxidizing agents in the HClO-mediated Fered-Fenton (EF-Fere-HClO) process and their dependence on the pollutant structure. It was found that the reaction between HClO and Fe2+ generates FeIVO2+, rather than center dot OH or Cl center dot suggested in the literature. The FeIVO2+ and center dot OH can selectively react with electron-rich compounds and simultaneously non-selectively attack other compounds formed from Fenton's reaction.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Electrochemistry
G. I. Lozano Gutierrez, O. Ornelas Davila, C. Lopez Aguilar, M. M. Davila Jimenez, R. Silva Gonzalez, I. Sires, E. Brillas, D. Fabregat-Safont, A. F. Roig Navarro, J. Beltran Arandes, J. V. Sancho Llopis
Summary: The electrocatalytic oxidation of meglumine and gadoterate meglumine on a TiO2-Ni(SO4)0.3(OH)1.4 composite anode in alkaline medium was investigated. The composite was prepared by hydrothermal method and characterized using various techniques. The supported composite showed good stability and electro-catalytic activity for meglumine oxidation.
ELECTROCHIMICA ACTA
(2023)
Review
Chemistry, Multidisciplinary
Fengxia Deng, Jizhou Jiang, Ignasi Sires
Summary: The electro-Fenton (EF) process has made significant progress and application in wastewater treatment, particularly at lab and pilot scale, over the past 25 years. This review uses bibliometrics as a tool to quantify the development of EF and introduces useful correlations, summarizing information in a more visual manner for easier analysis and interpretation. China, Spain, and France are the leading countries in terms of publication output, with 83 countries contributing to the growth of EF publications.
Review
Chemistry, Physical
Carlos A. Martinez-Huitle, Manuel A. Rodrigo, Ignasi Sires, Onofrio Scialdone
Summary: In the past decade, updated water directives and ambitious targets like the United Nations' Sustainable Development Goals have emerged to address water scarcity and contamination. Despite numerous strategies for water pollutant removal, the effectiveness against toxic and biorefractory organic molecules still needs improvement. This review discusses the latest innovations and perspectives of electrochemical tools for wastewater treatment, including direct electrochemical oxidation, oxidation mediated by electrogenerated active chlorine, electrocatalytic reduction, and coupled approaches for anodic and cathodic processes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Gengbo Ren, Sonia Lanzalaco, Minghua Zhou, Pere L. Cabot, Enric Brillas, Ignasi Sires
Summary: The superior endurance of 3 cm2 air-diffusion electrodes(ADEs) fabricated with Nimesh as substrate in Fenton's reaction is proven in this study. These electrodes achieved stable accumulation of H2O2 up to 60 mM at 100 mA for 48 h and showed high performance in degradation of carbenicillin. The photoelectro-Fenton (PEF) process using Nimesh|C-PTFE ADE at 20 mA in an acidic model solution achieved complete degradation of the antibiotic in 13 min.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Zhihong Ye, Wenfeng Zhang, Sonia Lanzalaco, Lele Zhao, Ignasi Sires, Pan Xia, Jun Zhai, Qiang He
Summary: A sulfidation strategy is proposed to enhance the catalytic activity of MIL-88B(Fe) in water treatment. The sulfidated catalyst outperformed the original MIL-88B(Fe) in the degradation of organic micropollutants and can be reused.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Pan Xia, Chaohai Wang, Qiang He, Zhihong Ye, Ignasi Sires
Summary: Single-atom catalysts (SACs) have emerged as a new frontier in advanced oxidation processes (AOPs) by combining the advantages of homogeneous and heterogeneous catalysts. Metal-organic frameworks (MOFs) are considered as ideal precursors for synthesizing SACs. This review describes the synthetic strategies and characterization methods of MOF-derived SACs, as well as their applications in water treatment and electrochemical AOPs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Eva Fores, Cristina Mejias-Molina, Arantxa Ramos, Marta Itarte, Ayalkibet Hundesa, Marta Rusinol, Sandra Martinez-Puchol, Pau Esteve-Briculle, Alejandro Espejo-Valverde, Ignasi Sires, Miquel Calvo, Rosa M. Araujo, Rosina Girones
Summary: Water treatment and reuse have gained acceptance as effective strategies to combat water contamination and scarcity. Electrochemical advanced processes have emerged as a viable alternative for water remediation, offering efficient disinfection of microorganisms. The study aimed to quantify the efficiency of a laboratory-scale electrochemical system in inactivating various microorganisms in synthetic water and urban wastewater. The use of Ti|RuO2-based plate and Si|BDD thin-film as anodes, combined with a stainless-steel cathode, resulted in the production of oxidants and high disinfection efficiency for bacteria and bacteriophages. However, the efficiency was limited for certain microorganisms such as spores and amoebas. Different models must be considered to predict the inactivation kinetics based on the sensitivity of microorganisms.
Article
Engineering, Environmental
Paulo Renato dos Santos, Maria Eduarda de Oliveira Dourados, Ignasi Sires, Enric Brillas, Rodrigo Pereira Cavalcante, Priscila Sabioni Cavalheri, Paula Loureiro Paulo, Diego Roberto Vieira Guelfi, Silvio Cesar de Oliveira, Fabio Gozzi, Amilcar Machulek Junior
Summary: This study demonstrates the suitability of factorial design for the treatment of greywater (GW) containing dodecyl-benzene sulfonic acid (LAS) using electrochemical advanced oxidation processes (EAOPs). Anodic oxidation with electrogenerated H2O2 (AO-H2O2) and photoelectro Fenton (PEF) processes were studied at bench scale using a factorial design. The optimized conditions for the AO-H2O2 process resulted in a 76% degradation of LAS and 52% TOC removal, while the optimized conditions for the PEF process led to a 63% degradation of LAS and 78% TOC abatement. The solar PEF (SPEF) process with a compound parabolic collector (CPC) as a solar reactor showed a 70% removal of LAS and a 55% mineralization of GW after 240 minutes of treatment.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
J. Trevino-Resendez, N. Grajales, A. Medel, I. Sires, Y. Meas
Summary: The effect of pH and applied current on the generation of hydroxyl radicals (center dot OH) from Fenton's reaction during peroxi-coagulation treatment was evaluated. Using a fluorescence probe (coumarin) and kinetic modeling, the center dot OH concentration at different current values and the effect of pH on their production were estimated. A system with six ordinary differential equations was solved to predict the concentrations of the main species of Fenton's reaction. The results indicate a positive influence of current increase on center dot OH generation, but a decrease at a higher current due to excessive H2O2 generation and increased pH.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Physical
Pan Xia, Zhihong Ye, Lele Zhao, Qian Xue, Sonia Lanzalaco, Qiang He, Xueqiang Qi, Ignasi Sires
Summary: An iron single-atom catalyst synthesized using a surfactant-coordinated metal-organic framework approach exhibits excellent catalytic performance and recyclability in the degradation of organic pollutants.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Chemistry, Multidisciplinary
Fengxia Deng, Hugo Olvera-Vargas, Minghua Zhou, Shan Qiu, Ignasi Sires, Enric Brillas
Summary: This review provides a comprehensive overview of the mechanisms of Fe3+ cathodic reduction in the electro-Fenton (EF) process. Different strategies to improve the reduction rate are discussed, categorized into electron transfer control and mass transport control. Electron transfer control strategies include creating active sites in carbon and metal-based materials and using emerging techniques like single-atom catalysis or confinement effects. Mass transport control approaches involve magnetic fields, pulse electrolysis, interfacial Joule heating effects, and photoirradiation. Challenges and future prospects are also mentioned. This review aims to clarify the Fe3+/Fe2+ cycling process in the EF process, providing insights for the smart design of highly effective wastewater treatment and valorization systems at an industrial scale.
Article
Materials Science, Multidisciplinary
Abdoulaye Thiam, Ignasi Sires, Pere L. Cabot, Francisco Alcaide
Summary: This study synthesized Nb-doped titania nanotubes (TNTs) and Nb-doped TiO2 nanoparticles for photocatalytic removal of dye wastewater. The Nb-doped TNTs at 6 at.% Nb showed the best performance with a porous network structure composed of nanotubes and nanosheets, demonstrating a large aspect ratio and uniform pore size distribution. They have the potential to become a prominent photocatalyst for water treatment.
Article
Engineering, Chemical
Monica Reig, Xanel Vecino, Cesar Valderrama, Ignasi Siries, Jose Luis Cortina
Summary: The feasibility of Cu recovery from bottom ash (BA) has been studied for the first time through solid-liquid extraction and electrowinning (EW). By increasing the current density and electrodeposition time, the maximum electrochemical Cu recovery can be achieved. This approach can effectively utilize BA resources and promote the development of a circular economy.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Oscar M. Cornejo, Ignasi Sires, Jose L. Nava
Summary: This study experimentally characterized a rotating cylinder electrode (RCE) reactor for the degradation of the antibiotic ampicillin (AMP) using the photoelectro-Fenton (PEF) process. The results showed that the RCE reactor could continuously produce H2O2 without the need for an air compressor. Under optimum PEF conditions, 10 mg L-1 AMP was completely degraded in just 10 minutes, with low electrolytic energy consumption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Oscar M. Cornejo, Ignasi Sires, Jose L. Nava
Summary: This work characterizes an innovative electrolyzer for self-sustained H2O2 production and simultaneous degradation of ciprofloxacin by PEF process. The electrolyzer uses two alternated anodes and cathodes to produce H2O2 and degrade ciprofloxacin. By examining various operation conditions, it is demonstrated that the reactor configuration can achieve sufficient H2O2 concentration for PEF treatment without the need for an air pump or compressor. Complete elimination of ciprofloxacin was achieved in 40 minutes with a high mineralization current efficiency and low energy consumption.
CHEMICAL ENGINEERING JOURNAL
(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)
