Article
Environmental Sciences
Jiping Li, Kai Liu, Wei Li, Meng Zhang, Pingping Li, Jiangang Han
Summary: Microalgae-based biotechnology for antibiotic removal is a promising and environmentally friendly method. This study investigated the mechanism of erythromycin removal by Chlorella pyrenoidosa and its impact on microalgae's ecotoxic response. Biodegradation was found to be the main removal mechanism, while high concentrations of erythromycin inhibited microalgae growth and led to the production of more toxic degradation products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Kai Liu, Jiping Li, Yuhao Zhou, Wei Li, Hu Cheng, Jiangang Han
Summary: The combined ecotoxicity of erythromycin (ERY) and roxithromycin (ROX) on microalgae and their removal efficiency during exposure were investigated in this study. The results showed that the mixture of ERY+ROX had an antagonistic effect on Chlorella pyrenoidosa. In addition, the combined treatment had higher antioxidant stress and removal efficiency than individual treatments, especially at low concentrations.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Engineering, Environmental
Atif Khan, Hamayoun Mahmood, Saima Yasin, Muhammad Moniruzzaman, Tanveer Iqbal
Summary: AOPs have shown great potential in water purification and treatment, particularly in the removal of toxins, emerging pollutants, pesticides, and harmful substances. This research provides a comprehensive assessment of innovative AOPs for the treatment of MEA in aqueous phase, examining degradation mechanisms, process parameters, and various AOP methods. The review is helpful for researchers in understanding critical operating parameters and developing commercially viable solutions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Wei-Chin Kee, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Farrah Aini Dahalan, Audrey Chai, Kim-Mun Eng
Summary: This study investigated the combined coagulation and sequencing batch biofilm reactor (SBBR) system for the treatment of sugarcane vinasse. The results showed that the combined processes could effectively reduce COD and decolorize the wastewater. The SBBR-CP process achieved higher COD reduction and decolorization efficiencies.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Wei-Chin Kee, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Farrah Aini Dahalan, Audrey Chai, Kim-Mun Eng
Summary: This study employed the combined coagulation and sequencing batch biofilm reactor (SBBR) system for the treatment of sugarcane vinasse. It determined the recommended conditions for coagulation and SBBR processes and investigated their effectiveness. The results showed that the coagulation process achieved high COD reduction and decolorization efficiencies, while the SBBR process showed excellent biodegradability. The combined SBBR-CP process demonstrated even greater removal efficiencies compared to the CP-SBBR process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Iremsu Kayan, Nilgun Ayman Oz, Cetin Kantar
Summary: The aerobic biodegradation combined with pyrite-Fenton process was found effective in treating wastewater containing various chlorophenols by reducing toxicity and improving COD removal efficiency. The type of chlorophenol treated greatly influenced the biodegradation process, with highly chlorinated CPs such as 2,4,6-TCP showing the highest toxicity. Sludge acclimation and pyrite-Fenton pre-treatment enhanced the biomass tolerance to CP toxicity and improved sCOD removal efficiencies, showcasing the potential of this combined system for effective treatment of chlorophenol-containing wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Qiuyue Yin, Hongyun Nie, Maiqian Nie, Yonghua Guo, Bo Zhang, Lei Wang, Yan Wang, Xuerui Bai
Summary: This study developed a new rapid and effective treatment method for waxy oily sludge (WOS) from petrochemical enterprises, using dispersion and biodegradation in a semi-fluid state. The degradation mechanism was discussed and component analysis showed that compounds with large molecular weight made up more than 50% of the WOS. Among all microbial consortiums, the FF: NY3 = 9:1 consortium had the best treatment effect for crude oil in WOS, significantly different from a single strain (p < 0.05). Under optimized conditions, the developed microbial consortium could remove 85% of total hydrocarbon pollutants in a 20 L semi-fluid bioreactor within 9 days.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Seungdae Oh, Hiep T. Nguyen
Summary: The study demonstrated the beneficial role of hydrogen peroxide (H2O2)-pretreated biochar (BC) in an activated sludge (AS) bioprocess for the removal and detoxification of oxytetracycline (OTC) and its byproducts. The BC addition significantly enhanced the OTC removal rates, system functioning, and reduction of toxicity. Additionally, novel bacterial populations closely related to OTC degradation were identified.
ENVIRONMENTAL RESEARCH
(2023)
Review
Agricultural Engineering
Huu Tuan Tran, Chitsan Lin, Xuan-Thanh Bui, Minh Ky Nguyen, Ngoc Dan Thanh Cao, Hussnain Mukhtar, Hong Giang Hoang, Sunita Varjani, Huu Hao Ngo, Long D. Nghiem
Summary: This article reviews the occurrence, fate, and concentration of phthalates in various environmental matrices and discusses the application and efficiency of various advanced wastewater treatment technologies in phthalate removal, as well as identifies key factors influencing the removal efficiency.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Bin Cui, Shaozhu Fu, Xin Hao, Dandan Zhou
Summary: In this study, a simultaneous combination of ozonation and biodegradation (SCOB) was proposed to treat coking wastewater. The SCOB system showed higher COD and total phenol removal compared to individual biodegradation and ozonation systems. Ozonation contributed to the oxidation of organics with unsaturated functional groups and soluble microbial products (SMPs), resulting in a decrease in effluent toxicity and chroma. The core of the carrier became the dominant region for biodegradation, leading to the stabilization of COD removal at >80%.
Review
Environmental Sciences
T. G. Carpanez, V. R. Moreira, I. R. Assis, M. C. S. Amaral
Summary: This review evaluates the feasibility of using sugarcane vinasse as a precursor material for organo-mineral fertilizers and discusses its advantages and limitations. Research indicates that converting vinasse into organo-mineral fertilizers may reduce environmental impact, but empirical validation and comparative studies are still needed to prove its feasibility.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Nain Tara, Mazhar Iqbal, Fazal-e Habib, Qaiser Mahmood Khan, Samina Iqbal, Muhammad Afzal, Hans Brix
Summary: The study successfully degraded RB5 dye using a bacteria-augmented floating treatment wetlands system, revealing the non-toxicity of the metabolites produced. This method could be a promising option for azo dye treatment and may contribute to improving overall textile effluent cleanup processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Gi-Taek Oh, Chi-Kyu Ahn, Min-Woo Lee
Summary: This study investigated a wastewater treatment configuration consisting of advanced oxidation pretreatment and biological wastewater treatment process for treating reclaimer wastewater generated in a steel-making industry. The peroxone method was found to be effective in decomposing MDEA and achieving high removal efficiencies of MDEA and COD. Additionally, the peroxone pretreatment greatly improved the biodegradability of the wastewater, and the oxygen uptake rate profiles showed the microbial degradation rates of different pollutants.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Rahul R. Jadhav, Ashvini U. Chaudhari, Devashree N. Patil, Kisan M. Kodam, Jyoti P. Jadhav
Summary: The study focuses on the efficient biotransformation and detoxification of dyes and in situ textile effluent treatment using a mixed consortium of the perennial herbaceous plant Canna indica and the fungus Saccharomyces cerevisiae. The consortium showed a high decolorization rate of the di-azo dye Congo red (CR) within 72 hours. The plant exhibited increased pigment levels and the CR was transformed into non-toxic metabolic constituents. The consortium also efficiently treated textile wastewater, reducing various parameters. This study suggests the intelligent use of the consortium for textile wastewater treatment.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Jue Wang, Jianhua Xiong, Qilin Feng, Zhou Wan, Zhenqi Zhou, Bing Xiao, Jiaming Zhang, Outhay Singdala
Summary: This study achieved effective degradation and mineralization of the recalcitrant organic compound trichlorobenzene through the coupling of specific microorganisms and photocatalytic materials. The coupled system showed improved degradation and mineralization efficiency, and the degradation mechanism was revealed through intermediate analysis. Moreover, the evolution of biofilms provided support for degradation and mineralization.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Chemistry, Physical
Wenqian Li, Muhammad Bilal, Anil Kumar Singh, Farooq Sher, S. Salman Ashraf, Marcelo Franco, Juliana Heloisa Pine Americo-Pinheiro, Hafiz M. N. Iqbal
Summary: This article reviews protein engineering approaches that focus on regulating the catalytic microenvironment of enzymes. By adjusting pH, creating water-like microenvironments, and activating enzyme catalysis in organic solvents and gas phase, the effectiveness of catalysts can be optimized, making them important for industrial bioprocesses.
Article
Environmental Sciences
Noureddine El Messaoudi, Abdelaziz El Mouden, Yasmine Fernine, Mohammed El Khomri, Amal Bouich, Nadia Faska, Zeynep Cigeroglu, Juliana Heloisa Pine Americo-Pinheiro, Amane Jada, Abdellah Lacherai
Summary: Silver oxide nanoparticles synthesized from pomegranate leaf extract showed adsorption capacity for removing antibiotics from aqueous solutions. Experimental data and theoretical models confirmed the homogeneous adsorbed layer of antibiotics on the surface of silver oxide nanoparticles and their ability to be reused. Quantum chemical calculations revealed that the unprotonated form of the antibiotic interacted more favorably with the silver oxide surface. These results suggest that silver oxide nanoparticles have promising potential for antibiotic removal from wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Andressa J. A. Simoes, Aline R. Doria, Danielle S. Vieira, Luciane P. C. Romao, Giancarlo R. Salazar-Banda, Katlin I. B. Eguiluz
Summary: This study investigated the performance of a 3D mixed metal oxide anode produced by hybrid heating using microwaves in the electrochemical oxidation of ciprofloxacin. Compared to a 2D anode, the 3D anode showed superior electrocatalytic properties due to its larger surface area. The microfluidic flow-through reactor demonstrated the lowest energy consumption and could be a promising option for degrading recalcitrant organic compounds like ciprofloxacin.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Leandro R. Prado, Renan T. Figueiredo, Ronaldo S. Silva, Cristiano T. Meneses, Flavia M. R. Mendonca, Gustavo R. Borges, Claudio Dariva, Elton Franceschi, Giancarlo R. Salazar-Banda, Silvia M. Egues
Summary: Mesoporous titanium dioxide particles (TiO2) were synthesized through reactive precipitation using the supercritical anti-solvent (SAS) technique with carbon dioxide and the ionic liquid (IL) 1-methyl-3-octylimidazolium bis[trifluoromethylsulfonyl] imide, [C(8)mim][NTf2]. The particles exhibited anatase and brookite crystalline phases, with brookite peaks more pronounced in samples synthesized with the IL. The TiO2 particles had high surface area, controlled porosity, narrow pore size distribution, high thermal stability, and spherical morphology. The particle size decreased with the use of the IL and increased with a higher precursor/alcohol ratio.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Edmundo S. Valerio Neto, Caio V. S. Almeida, Haoliang Huang, Andrea E. E. Russell, Katlin I. B. Eguiluz, Giancarlo R. R. Salazar-Banda
Summary: The synthesis of Pt-Rh alloy nanowires without surfactants or templates was achieved by chemical reduction at room temperature. The Pt/C nanowires and Pt-Rh/C nanowires-nanoparticles catalysts were characterized and found to be more active for ethanol oxidation than the commercial Pt/C reference catalyst. The Pt-Rh/C nanowires also showed a higher specific activity compared to Pt/C nanowires and Pt/C reference catalysts after chronoamperometric tests.
Article
Environmental Sciences
Abdelaziz El Mouden, Noureddine El Messaoudi, Abdelqader El Guerraf, Amal Bouich, Valbone Mehmeti, Abdellah Lacherai, Amane Jada, Juliana Heloisa Pine Americo-Pinheiro
Summary: The composite Fe3O4 nanoparticles (DQ@Fe3O4) based on natural clay (dolomite and quartz) have been extensively studied for the removal of heavy metal ion contaminants from residual waters. Optimized experimental parameters showed that DQ@Fe3O4 achieved maximum removals of 95.02% for Pb2+ and 86.89% for Cd2+ at specific conditions. Characterization techniques confirmed the co-precipitation of dolomite-quartz by Fe3O4 nanoparticles. Kinetic and equilibrium studies further supported the suitability of pseudo-second-order kinetic and Langmuir isotherm models for metal binding onto the DQ@Fe3O4 surface. Thermodynamic and Monte Carlo simulation data demonstrated the spontaneity and effectiveness of the adsorption process. In summary, DQ@Fe3O4 can be considered as a cost-effective adsorbent with great potential for wastewater treatment.
ENVIRONMENTAL RESEARCH
(2023)
Article
Microbiology
Isidor Happacher, Mario Aguiar, Mostafa Alilou, Beate Abt, Tim J. H. Baltussen, Clemens Decristoforo, Willem J. G. Melchers, Hubertus Haas
Summary: Aspergillus fumigatus, a common airborne fungal pathogen, utilizes two high-affinity iron uptake mechanisms, reductive iron assimilation (RIA) and siderophore-mediated iron acquisition (SIA), to maintain iron homeostasis and enhance virulence. This study focused on understanding iron acquisition during germination and revealed that ferricrocin, a siderophore, plays a crucial role in this process. Ferricrocin was found to be secreted and taken up during early germination, regardless of iron availability, indicating developmental regulation of this iron acquisition system. These findings provide insights into the mechanisms of iron acquisition and suggest potential targets for the diagnosis and treatment of fungal infections.
MICROBIOLOGY SPECTRUM
(2023)
Article
Electrochemistry
Dara S. Santos, Caio V. S. Almeida, Katlin I. B. Eguiluz, Giancarlo R. Salazar-Banda
Summary: The catalytic activity of Pdx@Pty/C core-shell nanoparticles for methanol electrooxidation was investigated. The core-shell nanoparticles exhibited good dispersion, small particle sizes, and a Pd-Pt-rich core with a Pt shell. The core-shell catalysts displayed improved catalytic properties compared to Pt/C catalysts, and the Pd0.3@Pt0.7/C catalyst achieved the highest catalytic activity.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Mechanical
Arley Alles Cruz, Fabio Cleisto Alda Dossi, Giancarlo Richard Salazar-Banda, Elton Franceschi, Gustavo Rodrigues Borges, Claudio Dariva
Summary: This study develops a new technique for monitoring inorganic scale based on electrical measurements in order to tackle scale formation in deep water oilfields. Synthetic water with similar composition to a pre-salt Brazilian oilfield was used for experiments, and two different methodologies for fouling formation were applied. The results show that the multiple-batch methodology increases the content of inorganic deposits on the electrodes and improves the system's output signal decay analysis. SEM-EDS studies validate the presence of fouling deposits and demonstrate the spatial distribution of the main scaling chemical elements.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Chemical
Aline R. Doria, Angela Moratalla, Caio V. S. Almeida, Ronaldo S. Silva, Katlin I. B. Eguiluz, Giancarlo R. Salazar-Banda, Manuel A. Rodrigo, Cristina Saez
Summary: Developing highly selective anode materials for hypochlorite generation in low-concentrated sodium chloride solutions is challenging. In this study, ruthenium-based binary anodes (Ti/RuO2 -Sb2O4 and Ti/RuO2 -TiO2) were synthesized using different heating methods. The anode characteristics and catalytic activity were found to be influenced by the heating method and chemical composition. The Ti/RuO2 -TiO2 anode prepared by laser heating showed the highest electrocatalytic activity for generating hypochlorite from low-concentrated NaCl solutions. This study provides new insights into the preparation of low-cost materials for efficient disinfectant generation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Aline R. Doria, Isabelle M. D. Gonzaga, Gessica O. S. Santos, Caio V. S. Almeida, Deyvid C. Silva, Ronaldo S. Silva, Luciane P. C. Roma, Cristina Saez, Giancarlo R. Salazar-Banda, Katlin I. B. Eguiluz
Summary: Ti/RuO2-TiO2 anodes were prepared using unconventional heating methods involving CO2 laser and microwave irradiation. These anodes exhibited improved electrochemical properties compared to conventionally-prepared anodes, with increased voltammetric charge and decreased charge transfer resistance. The laser and microwave-prepared anodes also had longer lifetimes and high efficiency in generating hypochlorite and degrading ciprofloxacin.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Environmental Sciences
Atif Khurshid Wani, Nahid Akhtar, Nafiaah Naqash, Farida Rahayu, Djajadi Djajadi, Chirag Chopra, Reena Singh, Sikandar I. Mulla, Farooq Sher, Heloisa Pine Americo-Pinheiro Juliana
Summary: Microplastics (MPs) are pervasive pollutants in the environment, with increasing accumulation in aquatic, marine, and terrestrial ecosystems due to human activities. These MPs, which degrade slowly, pose a threat to biota by increasing the probability of biomagnification of persistent, bioaccumulative, and toxic substances. In order to remediate MP-pollutants, efficient strategies are needed to prevent the leaching of contaminants into water, soil, and eventually into humans. Microorganisms capable of degrading plastic polymers through enzymatic actions have been discovered, and metagenomics is an effective tool for exploring and characterizing these plastic-degrading microbial consortia and enzymes. Combined with metatranscriptomics and metabolomics, metagenomics can identify and select remediation-efficient microbes in their natural habitats. Advances in bioinformatics and sequencing tools enable rapid screening, mining, and prediction of genes involved in polymer degradation. This review provides a comprehensive summary of the growing threat of microplastics globally and emphasizes the role of metagenomics and computational biology in developing effective strategies for MP remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Stephanie Soares Aristides, Caio Vinicius da Silva Almeida, Katlin Ivon Barrios Eguiluz, Giancarlo R. Salazar-Banda
Summary: In this study, NixFey@Pdz/C core-shell nanoparticles with different compositions were synthesized and it was found that the addition of Ni-Fe enhanced the catalytic activity of Pd in glycerol oxidation. Among them, the Ni1.5Fe13.5@Pd85/C catalyst exhibited the best electrocatalytic performance with a specific activity 1.28 times higher than that of Pd/C. In situ FTIR spectroscopy data revealed favorable formate and CO2 production on NiFe@Pd/C catalysts. The results highlight the synergistic effect of composition and core-shell morphology on catalytic activity.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Environmental Sciences
Raira Souza de Santana Castro, Aline Resende Doria, Fabio Costa, Silvana Mattedi, Katlin Ivon Barrios Eguiluz, Giancarlo Richard Salazar-Banda
Summary: The development of efficient and economically viable anode technologies is crucial for treating water contaminated with complex organic pollutants. The use of ionic liquids as solvents in the production of anodes has emerged as a promising alternative, with the calcination temperature playing a decisive role in the anodes' durability and electrochemical properties. Anodes prepared with dipropyl ammonium butyrate (DPA-Bu) at 350 degrees C exhibit higher stability and improved results in terms of organic compound degradation.
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)
