Article
Environmental Sciences
Elisabeth Cuervo Lumbaque, Calita Elis Schweigert, Leonardo Oliveira dos Santos, Vladimir Lavayen, Joao Henrique Zimnoch dos Santos, Carla Sirtori
Summary: Solar light-driven photocatalyst from petrochemical industrial waste was evaluated for the degradation of three pharmaceuticals in different water matrices. The experiment results showed significant differences between the photocatalyst and the waste material, suggesting its potential use in degrading contaminants of emerging concern. The study also identified transformation products generated during the treatment, with some showing high toxicity levels for different trophic levels.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yue Liu, Long Chen, Xiaona Liu, Tianwei Qian, Meng Yao, Wen Liu, Haodong Ji
Summary: In this study, a simple post-calcination method was used to modify graphitic carbon nitride (g-C3N4) without additional elements, metals, or semiconductors, resulting in improved photocatalytic activity. The modified g-C3N4-Ar/Air showed efficient degradation of sulfamethazine under simulated solar light, with a higher removal rate compared to pristine g-C3N4. The tuning method of g-C3N4 provided a simple approach to enhance the utilization efficiency of solar light and has great potential in wastewater treatment.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Physical
Lawrence Sawunyama, Opeyemi A. Oyewo, Naledi Seheri, Sylvanus A. Onjefu, Damian C. Onwudiwe
Summary: The use of ceramic membranes functionalized with metal oxide for pollutant removal has rapidly advanced, particularly in wastewater treatment. This hybrid approach improves filtering effectiveness, material recoverability, antifouling ability, and long-term performance compared to conventional photocatalyst and ceramic membranes. Key properties such as mechanical strength, chemical resistance, non-toxicity, and cost-effectiveness have contributed to their expanding usage in water treatment. This review focuses on techniques for fabricating metal oxide functionalized ceramic membranes, addressing limitations, advantages, approaches to overcome limitations, semiconductor influence on material performance, recent advancements, and the removal of pharmaceuticals in wastewater.
SURFACES AND INTERFACES
(2023)
Review
Agricultural Engineering
David M. Kennes-Veiga, Lorena Gonzalez-Gil, Marta Carballa, Juan M. Lema
Summary: This review focuses on the metabolic activities, mechanisms, and enzymatic activities involved in the biotransformation of organic micropollutants in wastewater treatment plants under different redox environments. Common methodologies for studying such enzymes, including in vitro enzyme assays, enzymatic inhibitors, analysis of transformation products, and various -omic techniques, are discussed. Perspectives on major challenges and future research requirements to enhance the biotransformation of organic micropollutants are proposed.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
J. Meijide, G. Lama, M. Pazos, M. A. Sanroman, P. S. M. Dunlop
Summary: Contaminants of emerging concern, including pharmaceuticals, are detected at low concentrations in surface waters, posing potential risks to aquatic life and the food chain. This review focuses on the removal of active pharmaceutical ingredients using ultraviolet processes, such as photo-Fenton, photocatalysis, and photoelectrocatalysis. However, there is limited research on scaling up the systems and testing their effectiveness in real water matrices.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Elisabeth Cuervo Lumbaque, Renata M. Cardoso, Adriano de Araujo Gomes, Sixto Malato, Jose A. Sanchez Perez, Carla Sirtori
Summary: This study examined the removal of six representative pharmaceuticals in raw hospital wastewater by solar photo-Fenton with Fe3+-EDDS, finding that Fe3+:EDDS (1:2) conditions favored the efficient degradation of PHCs, with most TPs showing degradation percentages above 77% and no toxicity in the majority of TPs.
MICROCHEMICAL JOURNAL
(2021)
Article
Engineering, Environmental
Alexander Betsholtz, Ruben Juarez, Ola Svahn, Asa Davidsson, Michael Cimbritz, Per Falas
Summary: Ozonation transformation products (OTPs) are unknown compounds formed during the ozonation of micropollutants. It was found that OTPs have low adsorption capacity and cannot be effectively removed by activated carbon adsorption alone.
Article
Engineering, Environmental
Laia Sabater-Liesa, Nicola Montemurro, Antoni Ginebreda, Damia Barcelo, Peter Eichhorn, Sandra Perez
Summary: Temporary rivers rely on wastewater effluent for base flows, impacting river ecosystems through exposure to nutrients and organic micropollutants. Biodegradation processes in these rivers can be enhanced by wastewater bacteria/biofilms.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Thomas F. Mundhenke, Akash P. Bhat, William C. K. Pomerantz, William A. Arnold
Summary: The aqueous photolysis of pharmaceuticals with different fluorinated functional groups was studied, and the fluorine-containing products were identified using quantitative fluorine nuclear magnetic resonance spectroscopy and mass spectrometry. The findings contribute to understanding the formation of organofluorine byproducts in the environment and determining effective water treatment processes for specific pharmaceuticals and fluorinated motifs.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2023)
Review
Engineering, Environmental
Mahmoud Samy, Kenneth Mensah, Mohamed Gar Alalm
Summary: This review discusses the application of photocatalysis in degrading organic micropollutants, focusing on methods to enhance photocatalytic degradation efficiency through doping or co-catalysts, as well as toxicity evaluation and identification techniques for transformation products.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Environmental Sciences
Jerry O. Adeyemi, Timothy Ajiboye, Damian C. Onwudiwe
Summary: Antibiotics are considered emerging pollutants due to their incomplete decomposition and indiscriminate disposal, leading to bio-magnification and bioaccumulation in the food chain. Microbial resistance poses a serious concern, and advanced oxidation processes, such as photocatalysis, are being explored to mineralize pharmaceuticals in water.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Engineering, Environmental
Xialu Lin, Phil M. Choi, Jack Thompson, Timothy Reeks, Rory Verhagen, Benjamin J. Tscharke, Elissa O'Malley, Katja M. Shimko, Xiong Guo, Kevin Thomas, Jake W. O'Brien
Summary: The study assessed the in-sample stability of selected pharmaceuticals and illicit drugs in wastewater under various conditions, revealing that some substances are unstable in untreated wastewater while others are relatively stable. Further research is needed to investigate the stability of different substances under different conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Xiaofan Yang, Yutao Xu, Saraschandra Naraginti, Xueyu Wei
Summary: This study developed a novel BiOCl (110)/ NrGO/BiVO4 heterojunction for the efficient removal of sulfamethazine (SMZ) antibiotic. The addition of BiVO4 and NrGO significantly enhanced the photocatalytic degradation efficiency of BiOCl, achieving a degradation rate of 96.9% within 60 minutes of visible light irradiation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Energy & Fuels
Linlin Zhang, Wei Sun, Chengjun Ge, Jianjun Liao
Summary: A novel photocatalyst is developed by anchoring copper sulfide nanoparticles on oxygen-doped graphitic carbon nitride hollow nanospheres, which shows high efficiency in degrading pharmaceuticals and personal care products under visible-NIR irradiation.
Review
Chemistry, Multidisciplinary
Timothy O. Ajiboye, Opeyemi A. Oyewo, Damian C. Onwudiwe
Summary: Personal care products such as soaps, toothpaste, and shampoo often contain pollutants like parabens, which can contaminate water sources and produce more toxic compounds. Photocatalysis using titanium oxide, graphene oxide, and graphitic carbon nitride is an effective method for the remediation of these pollutants.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Environmental
Mohamed Fouad, Mohamed Gar Alalm, Hisham Kh El-Etriby, Daria Camilla Boffito, Shinichi Ookawara, Teruhisa Ohno, Manabu Fujii
Summary: The study utilized ruthenium to enhance the photocatalytic activity of a WO3/ZrO2 composite, resulting in successful disinfection of raw surface waters collected from the Nile Delta region in Egypt. The Ru/WO3/ZrO2 composite showed superior bacterial deactivation compared to the benchmark S-TiO2, with good resistance against inhibition by natural organic matter, indicating potential practical applications.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biodiversity Conservation
Yuta Endo, Ayman Allam, Masafumi Natsuike, Chihiro Yoshimura, Manabu Fujii
Summary: The study focused on the export of dissolved iron from river catchments, with particular emphasis on the influence of land use and land cover. Results showed significant impacts of LULC on DFe export, with urban areas having a notable influence on DFe concentrations, indicating the strong impact of human activities on riverine DFe export.
LANDSCAPE AND ECOLOGICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Mahmoud Samy, Mona G. Ibrahim, Manabu Fujii, Kamal E. Diab, Marwa ElKady, Mohamed Gar Alalm
Summary: The photocatalysis technology faces a significant gap between academic research and practical application, but focusing on reactor design, fixed photocatalysts, real wastes, and cost estimation can enhance its feasibility. The use of CNTs/MOF-808 coated plates in a photocatalytic reactor showed stable and effective degradation of CBZ and diazinon. The study optimized operational parameters, investigated degradation mechanisms, and achieved successful reduction of organic pollutants in real liquid wastes, along with cost estimations for large-scale applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Naira Meky, Ahmed Elreedy, Mona G. Ibrahim, Manabu Fujii, Ahmed Tawfik
Summary: The study investigates the production of biohydrogen under acidic pH conditions using an intermittent dark-photo circular baffled reactor (IDP-CBR), which successfully achieved efficient hydrogen production from gelatin-based substrate. Adapted bacteria for this process were identified, and the IDP-CBR was found to outperform sequential configurations in maintaining medium pH and promoting light-dependent biohydrogen production.
Article
Environmental Sciences
Kenneth Mensah, Mahmoud Samy, Hani Ezz, Marwa Elkady, Hassan Shokry
Summary: The performance of three solid iron wastes as an activator for the degradation of methylene blue was evaluated, and one of them showed the best performance. The morphology, chemical composition, and chemical structure of the iron wastes were studied. The results showed that complete degradation of methylene blue could be achieved under certain conditions. The study also found that the iron waste could be efficiently employed in both the suspended and immobilized modes.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Energy & Fuels
Mahmoud Samy, Mohamed Gar Alalm, Eman Ezeldean, A. El-Dissouky, Nadia B. E. Badr, Ala'a Al-Muhtaseb, Nawaf S. Alhajeri, Ahmed Osman, Ahmed Tawfik
Summary: Biochar was used to adsorb pesticides in agrochemical industrial wastewater, while ZnO catalyst was utilized to enhance the photodegradation efficiency. The addition of biochar increased the removal rates of LM, MA, and OX, whereas doping ZnO with iron did not improve the efficiency. The composite catalyst showed excellent reusability and stability.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Energy & Fuels
Kenneth Mensah, Hatem Mahmoud, Manabu Fujii, Mahmoud Samy, Hassan Shokry
Summary: Three novel adsorbents, including mesoporous graphene (MG), nano-eggshell modified graphene (nEMG), and nano-magnetic eggshell modified graphene (nM-EMG), were synthesized using high-density polyethylene (HDPE) waste and chicken eggshell for methyl red (MR) adsorption from simulated wastewater. The effects of adsorption conditions were investigated, and the adsorbents' characteristics were analyzed. The adsorption capacities, mechanisms, and performance in different water matrices were evaluated. nM-EMG was found to be the most stable and reusable adsorbent after multiple regeneration cycles.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
K. Mensah, M. Samy, H. Mahmoud, M. Fujii, H. Shokry
Summary: This study utilized solvent-free conversion of waste plastics into carbon materials for the removal of sulfamethazine from aqueous solution. The carbon material synthesized at 600 degrees Celsius showed the highest adsorption performance. By optimizing the adsorption parameters, a highly efficient removal effect was achieved. The study also revealed the presence of specific π-π/π(+)-π electron interactions between graphene and sulfamethazine.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mahmoud Samy, Andy Gyamfi Kumi, Eslam Salama, Marwa ElKady, Kenneth Mensah, Hassan Shokry
Summary: This study investigated the fabrication of zinc oxide/water hyacinth-based activated carbon (ZnO/AC) and nano-magnetite (NM) (NM/ZnO/AC) nanohybrid for application in a photo-Fenton-like system. The optimal conditions for carbofuran degradation were determined to be pH 3, initial carbofuran concentration of 5.0 mg/L, PS concentration of 0.0923 mM, and NM/ZnO/AC catalyst dose of 0.9 g/L. The degradation efficiency was affected by hydroxyl and sulfate radicals, and the presence of dissolved organic matter, turbidity, and inorganic ions in water matrices. The use of suspended NM/ZnO/AC showed higher degradation efficiencies and mineralization ratios compared to immobilized mode.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Multidisciplinary Sciences
Eslam Salama, Mahmoud Samy, Hassan Shokry, Gehan El-Subruiti, Asmaa El-Sharkawy, Hesham Hamad, Marwa Elkady
Summary: In this study, nano zero-valent iron (NZVI) was fabricated under optimum conditions and immobilized with silica and starch to form composite nanomaterials. The silica-modified NZVI showed the highest removal efficiency for hexavalent chromium (Cr(VI)). The presence of other ions and humic acid reduced the removal efficiency, but it could be improved by adding hydrogen peroxide. The reusability of silica-modified NZVI was investigated and the removal mechanism was suggested to be a physicochemical process. The study also demonstrated the potential of NZVI for long-term use in removing emerging water pollutants.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Mahmoud Samy, Kenneth Mensah, Esmail M. El-Fakharany, Marwa Elkady, Hassan Shokry
Summary: The sustainable management of toner waste was achieved through carbonization at different temperatures to produce an iron oxide-nanographene nanohybrid. This nanohybrid effectively activated persulfate to degrade various pollutants, such as dyes, antibiotics, and pesticides. The synthesized materials were characterized, and the optimum operating conditions for maximum degradation efficiency were determined. The high stability and degradation efficiency of the catalyst, along with the promising results in different water matrices, make it a potential candidate for industrial-scale applications.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Mahmoud Samy, Mohamed Gar Alalm, Mohamed N. Khalil, Eman Ezeldean, A. El-Dissouky, Mahmoud Nasr, Ahmed Tawfik
Summary: This study investigates a combined photocatalytic and adsorption system for efficient removal of 1,4 dioxane from hazardous landfill leachate. Copper/iron doped zinc oxide (Cu-Fe-ZnO) was introduced to biochar to enhance its efficacy. The system achieved high removal efficiency of 1,4 dioxane and produced degradation products like ethylene glycol and organic acids.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Engineering, Environmental
Hamada B. Hawash, Abeer A. Moneer, Ahmed A. Galhoum, Ahmed M. Elgarahy, Walied A. A. Mohamed, Mahmoud Samy, Hisham R. El-Seedi, Mohamed S. Gaballah, Mahmoud F. Mubarak, Nour F. Attia
Summary: Pharmaceuticals and personal care products (PPCPs) residues are commonly found in the aquatic environments of industrialized and developing countries. Research has been conducted on the exposure and distribution of PPCPs in water bodies. This review focuses on the global occurrence of PPCPs residues in different water matrices, their potential adverse effects on ecosystems and human health, the spatial distribution of PPCPs, case studies of contaminated areas, the relationship between occurrences and characteristics of detected compounds, legislation and regulations, and future research perspectives. The concentrations of PPCPs in WWTPs are higher compared to other water matrices, and there are variations in concentrations between countries and regions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Ebtesam A. El-Bestawy, Mohamed Gaber, Hassan Shokry, Mahmoud Samy
Summary: For the first time, biochar derived from spinach remnants was used for the activation of persulfate (PS) to degrade atrazine effectively. The characteristics of the prepared biochar were analyzed and confirmed the efficient activation of PS. Under the optimal conditions, the highest degradation of atrazine (99.8%) was achieved. The prepared biochar showed high recyclability and excellent performance in degrading real wastewater. The research provides evidence for the industrial-scale application of the biochar@PS system.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Eslam Salama, Kenneth Mensah, Marwa ElKady, Hassan Shokry, Mahmoud Samy
Summary: In this study, pure zero-valent iron (ZVI) supported on silica and starch was used to enhance the activation of persulfate (PS) for tetracycline degradation. The synthesized catalysts were characterized and their physical and chemical properties were evaluated. The addition of light and the modified ZVI-Si/PS system improved the degradation performance of tetracycline. The optimal operating parameters were determined by response surface methodology, and the degradation pathway and mechanism were explained. Tetracycline degradation was influenced by the presence of inorganic ions and dissolved organic matter in different matrices.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(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)
