Article
Engineering, Environmental
Yangyu Liu, Chunquan Li, Arman Peyravi, Zhiming Sun, Guangxin Zhang, Keivan Rahmani, Shuilin Zheng, Zaher Hashisho
Summary: Mesoporous silica MCM-41 was synthesized using sodium silicate extracted from natural Opoka, showing remarkable adsorption capacity for organic vapors mixture at 20 degrees Celsius and promising applications in VOCs abatement.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Yang Liu, Junjie Liao, Liping Chang, Weiren Bao
Summary: This paper investigates the adsorption performance of silver-modified mesoporous materials in removing thiophenic compounds. The results show that the adsorption of thiophene by the sorbents involves S-Ag and pi complexation reactions, and the adsorption efficiency is greatly affected by benzene. XPS analysis reveals that silver interacts strongly with the carrier and forms Ag-O-Si bonds as the active centers for thiophenic compounds. The Mulliken charges of sulfur atoms have an impact on the interactions between silver and thiophene sulfur compounds.
Article
Environmental Sciences
Jie Chen, Yao Yang, Yuanyuan Yao, Zhujian Huang, Qiaoling Xu, Liping He, Beini Gong
Summary: The contamination of antibiotics in the environment has become a serious concern. The development of cost-effective and environmentally friendly adsorbent materials is crucial in addressing this issue. Mesoporous molecular sieve MCM-41 shows significant promise due to its strong adsorption capacity, low cost, and efficient regenerative properties. This study investigated the adsorption behavior of demolded MCM-41 materials for tetracycline, doxycycline, and levofloxacin at different temperatures and pH levels. The results showed that a neutral or weakly acidic pH environment promoted adsorption, while alkaline conditions hindered it. The maximum adsorption capacities were determined for each antibiotic, highlighting the potential of MCM-41 in mitigating antibiotic wastewater contamination.
Article
Engineering, Chemical
Yangyu Liu, Arman Peyravi, Zaher Hashisho, Shuilin Zheng, Zhiming Sun, Xiao Chen, Yuping Tong, Yongxing Hao, Jiuyue Wang
Summary: Highly ordered hexagonal mesoporous silica was synthesized from natural Opoka minerals, and an all-atom model of MCM-41 was constructed by simulation. Characterization techniques such as XRD, N2 adsorption, FE-SEM, TEM and FT-IR were used, and the water vapor adsorption/desorption performance of the samples was evaluated. The simulation revealed that water molecules on MCM-41 mainly adsorbed on silanol groups and skeleton defects, and the adsorption changed from mono-layer to multi-layer with increasing pressure.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Rana J. Kadhim, Faris H. Al-Ani, Qusay F. Alsalhy, Alberto Figoli
Summary: This study focuses on optimizing the incorporation of MCM-41 mesoporous material into PES membranes for nanofiltration applications, aiming to reduce membrane fouling and improve energy efficiency. By using optimization techniques, mathematical and statistical analyses, the study identified optimal operating parameters to enhance membrane performance at a larger scale.
Article
Engineering, Chemical
Dayanne E. F. Oliveira, Jose A. . O. Chagas, Ana Lucia De Lima, Claudio J. A. . Mota
Summary: Chitosan was impregnated on MCM-41 and SBA-15 mesoporous silica supports and tested for CO2 adsorption. The SBA-15 adsorbent impregnated with 50 wt % of chitosan showed the best results, with CO2 uptake of 0.78 mmol g-1.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Analytical
Jian Zhang, Ximo Wang, Siyan Zhan, Hui Li, Changpo Ma, Zumin Qiu
Summary: The Mg/Al-LDH nanoflakes decorated magnetic mesoporous MCM-41 showed excellent adsorption properties for humic acid removal, with a spontaneous and endothermic process following pseudo-second-order and Langmuir isotherm models. The adsorbent demonstrated practical application and regeneration abilities, with electrostatic interactions and ion-exchange playing important roles in the adsorption process.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Malgorzata Geszke-Moritz, Michal Moritz
Summary: This study employed nonlinear fitting analysis to estimate the adsorption parameters of Terfenadine on MCM-41 mesoporous silica, and found that physisorption process was the main force of adsorption.
PRZEMYSL CHEMICZNY
(2022)
Article
Engineering, Chemical
Nidhal A. Atiyah, Talib M. Albayati, Mohammed A. Atiya
Summary: Mesoporous silica nanoparticles (MSNs) composed of MCM-41 were successfully synthesized and modified with amine groups to form NH2/MCM-41, which was loaded with curcumin (CUR) to create efficient carriers in drug delivery systems (DDSs). The study characterized the samples and investigated the effect of carrier dose, CUR concentration, pH, and contact time on drug loading efficiency (DLE%). NH2/MCM-41 showed higher DLE% and better drug release properties, indicating potential applications.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Rahmiye Zerrin Yarbay Sahin
Summary: The study found that MCM-41 catalyst showed significant effectiveness in removing dyes, especially methyl orange and setazol black. By adjusting factors such as catalyst dosage, contact time, and dye concentration, optimal dye adsorption efficiency can be achieved.
RESEARCH ON CHEMICAL INTERMEDIATES
(2022)
Article
Chemistry, Multidisciplinary
Malgorzata Geszke-Moritz, Aleksandra Stoinska, Michal Moritz
Summary: This study investigated the adsorption of Boldine from MeCN solutions on MCM-41 mesoporous silica. The parameters of Langmuir, Sips, and Dubinin-Astakhov isotherm models were estimated using nonlinear fitting analysis. It was found that MCM-41 silica exhibited a maximum adsorption capacity of 213.5-235.5 mg/g depending on the isotherm model used. The physisorption process was identified as the main force driving the adsorption of Boldine onto MCM-41 mesoporous silica.
PRZEMYSL CHEMICZNY
(2023)
Article
Chemistry, Inorganic & Nuclear
Sadia Nazir, Kamran Tahir, Afaq Ullah Khan, Shafiullah Khan, Karma Albalawi, Abeer M. Alosaimi, Mahmoud A. Hussein, Ebraheem Abdu Musad Saleh, Hamza S. Al-Shehri, Muhammad Saud Khan
Summary: In this study, a new material Ag/TiO2-MCM-41@LGCN was designed based on layered graphitic carbon nitride and mesoporous silica. The material showed excellent performance in removing Cr (VI) and reducing MB, due to its large surface area and multiple active sites, indicating its potential as an adsorbent and photodecomposition material for Cr (VI) and MB.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Ang Li, Xiao Chen, Tingting Guo, Guangtong Hai, Panpan Liu, Han Yu, Jianhang Xu
Summary: This study utilized molecular dynamics to investigate the molecular motion mechanisms of PCMs with different functional groups confined in mesoporous MCM-41, aiming to reveal the interaction mechanisms between the two at the molecular and atomic levels to provide theoretical guidance for the design and preparation of high-performance composite PCMs based on MCM-41.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Environmental Sciences
Nitin Goyal, Vijaya Kumar Bulasara, Gang Li, Liying Liu
Summary: This study synthesized and modified MCM-41 adsorbent for the effective removal of AZN from aqueous phase. The optimized conditions for maximum removal of AZN were found to be a pH of 6 and a temperature of 313 K. The pseudo-first-order kinetic model provided the best fit, while the adsorption equilibrium isotherm models showed strong correlation with the removal process of AZN.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Lurong Ge, Yaohui Feng, Yanjun Dai, Ruzhu Wang, Tianshu Ge
Summary: This study develops a composite sorbent with excellent water sorption performance and long-term stability by encapsulating an ionic liquid in ordered mesoporous MCM-41. The composite sorbent exhibits fast sorption rate, low temperature-driven regeneration potential, and no corrosion to metal components.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Jose Arnaldo Santana Costa, Vinicius Camara Costa, Matheus Lima de Mello, Caio Marcio Paranhos
Summary: The study successfully synthesized mesoporous structure material MCM-48 (RHA) from alternative amorphous silica extracted from rice husk ash, and tested its application in antimony remediation in environmental samples. The adsorbent exhibited excellent adsorption performance and structural characteristics, showing potential for efficient wastewater remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Jose Arnaldo S. Costa, Victor H. V. Sarmento, Luciane P. C. Romao, Caio M. Paranhos
Summary: This study developed a mixed matrix membrane (MMM) based on polyethersulfone (PES) and functionalized mesoporous material for the adsorption of PAHs mixture. The incorporation of PABA-MCM-41 in the PES matrix was found to influence the absorption of PAHs, indicating an effective purification technique.
Article
Chemistry, Multidisciplinary
Joselaine C. Santana, Ana Claudia M. da Silva, Ana Karla Abud, Alberto Wisniewski Jr, Luciane P. C. Romao
Summary: A method using glycerol as a green solvent for pretreatment of biomasses was developed. Optimization of the pretreatment conditions resulted in a sustainable and efficient process for biomass degradation.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Luma Mirely de Souza Brandao, Milson dos Santos Barbosa, Roberta Anjos de Jesus, Pradnya Arunrao Bharad, Alvaro Silva Lima, Cleide Mara Faria Soares, Rufino Manuel Navarro Yerga, Muhammad Bilal, Luiz Fernando Romanholo Ferreira, Hafiz M. N. Iqbal, Chinnakonda S. Gopinath, Renan Tavares Figueiredo
Summary: This study investigates a promising alternative for hydrogen production using enzymes. The combination of TiO2/MgCl2 with Burkholderia cepacia lipase (BCL) is found to significantly increase hydrogen production under simulated sunlight. The improved efficiency is attributed to the oxidation of protein peptides caused by TiO2, leading to an increase in the reduction equivalent of the system.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Priscila Vedovello, Jose Arnaldo Santana Costa, Carla Fernandes, Maria Elizabeth Tiritan, Caio Marcio Paranho
Summary: This article presents an approach to enhance the chiral resolution capacity of polymeric membranes using a silicon-based mesoporous architecture. The study demonstrates the successful integration of the mesoporous structure (MCM-41) grafted with a Pirkle-type chiral selector into the mixed matrix membrane (MMM) using the phase inversion method. The performance evaluation of the MMMs shows promising results, indicating its potential as an alternative for chiral separations in polymeric membrane technology.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Icaro Mota Oliveira, Roberta Anjos de Jesus, Victor Ruan Silva Nascimento, Muhammad Bilal, Hafiz M. N. Iqbal, Luiz Fernando Romanholo Ferreira, Antonio Reinaldo Cestari
Summary: This study investigates the use of sea bass scales as a low-cost adsorbent for removing methylene blue dye from water. The composition and interactions of the scales are analyzed, and the adsorption efficiency is evaluated under different conditions. A neural model is developed to predict the adsorption behavior, and a genetic algorithm is used for process optimization.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Chemistry, Analytical
Rhayza Victoria Matos Oliveira, Alessandra Ferreira Santos, Maria Danielly Lima Santos, Graziele da Costa Cunha, Luciane Pimenta Cruz Romao
Summary: In this study, magnetic hybrid materials composed of cobalt ferrite, natural organic matter, and graphene were synthesized and applied in the magnetic solid-phase extraction of bisphenol A from aqueous matrices. The developed method proved to be simple, fast, and efficient for the analysis of BPA in various aqueous matrices.
MICROCHEMICAL JOURNAL
(2022)
Article
Law
Marco Aurelio Fernandes Garcia, Jose Augusto Fontoura Costa
Summary: Brazil's telemedicine faces legal uncertainty and requires further regulation to protect the rights and interests of healthcare providers and patients.
REVISTA DE DIREITO SANITARIO-JOURNAL OF HEALTH LAW
(2022)
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
Chemistry, Applied
Jordan Brizi Neris, Jose Arnaldo S. Costa, Guilherme Martins Grosseli, Floriatan Santos Costa, Caio Marcio Paranhos
Summary: This study aims to evaluate the transport properties and CBZ adsorption capacities of PES/mesoparticles-based MMMs in aqueous solutions with different physicochemical characteristics. The results show that PES/SH-MCM-41-based MMMs have the highest potential for CBZ adsorption. The multivariate design results indicate that contact time, initial CBZ concentration, and the amount of SH-MCM-41 incorporated in MMM significantly influence the adsorption capacity, while pH does not affect it. Water permeability tests show a correlation between the H2O permeability and the porosity of the synthesized membranes. PES/SH-MCM-41-based MMMs exhibit high porosity and good ability to remove CBZ from water, regardless of the pH of the aqueous solutions.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Jany Hellen F. de Jesus, Rennan Geovanny O. Araujo, Luciane Pimenta C. Romao
Summary: This work presents a simple, practical, and cost-effective analytical method for the extraction and determination of gadolinium using cloud-point extraction (CPE). The method achieves high efficiency and accuracy through experimental design and optimization of variables. It is suitable for the determination of gadolinium in tap water and contrast agent solutions.
Article
Chemistry, Physical
Geovania Cordeiro de Assis, Roberta Anjos de Jesus, Welida Tamires Alves da Silva, Luiz Fernando Romanholo Ferreira, Renan Tavares Figueiredo, Rodrigo Jose de Oliveira
Summary: Plastic waste poses serious environmental and health risks and demands effective strategies for recycling and remediation. This article focuses on the development of polymeric supports for heterogeneous catalysts to treat organic/inorganic contaminants. The physicochemical properties of common commercial polymers are discussed, along with the environmental impact of plastic debris and recycling technologies. The use of nanomaterials as catalysts raises concerns about toxicity, thus emphasizing the importance of using supports for plastic waste recycling.
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
