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Kinetics, Thermodynamics and DFT Studies of a Local Clay as Adsorbent for Safranine and Methyl Green Dyes

Water, Air, & Soil Pollution 2025年第9期236卷 1-22页

作者： Ouaddari, Hanae Abbou, Brahim Benabdallah, Ismail Ouzzine, Mohamed Hernández-Saz, Jesús Habsaoui, Amar Fath Allah, Rabie Chemistry Platform UATRS National Center for Scientific and Technical Research (CNRST) Rabat Morocco Laboratory of Advanced Materials and Process Engineering Faculty of Sciences Ibn Tofail University Kenitra Morocco School of Applied and Engineering Physics Mohammed VI Polytechnic University Ben Guerir Morocco ERSIC Research Group Department of Chemistry Polydisciplinary Faculty University of Sultan Moulay Slimane Béni-Mellal Morocco Departamento de Ingeniería y Ciencia de los Materiales y del Transporte Universidad de Sevilla Seville Spain MaterialsEnvironment and Sustainable Development (MEDD) FSTT Abdelmalek Essaadi University Tetouan Morocco

In this research, a local and pristine clay was evaluated for the adsorption of different dyes from an aqueous medium. In this sense, a systematic characterization of the adsorbent was carried out using different techniques. X-ray diffraction (XRD) analysis indicate the presence of phyllosilicates, primarily consisting of chlorite and muscovite. Silicon dioxide (49,12%) and aluminum oxide (22,84%) are the predominant oxides primarily associated with the phyllosilicates. The studied clay showed significant adsorption capacities for both Safranine (SF) and Methyl Green (MG) dyes, with maximum adsorption capacities $${q}_{max}$$ of 101.09 mg/g and 86.87 mg/g, respectively. This was primarily attributed to a suitable morphology, as demonstrated by the Scanning Electron Microscopy (SEM), holding the dye molecules as verified directly by Energy-dispersive X-ray (EDX) and indirectly by Fourier Transform InfraRed (FTIR) analyses. Kinetic studies indicated that the adsorption are well described by the pseudo-second-order kinetic model, while the Langmuir model best described the experimental data. The thermodynamic variables exhibited an increase in the ΔG values as the temperature increase revealing the exothermic and thermodynamically favorable nature of the dyes adsorption mechanism. The theoretical investigation using the density functional theory (DFT) calculations on the structures of SF and MG dyes has demonstrated that SF cations exhibit higher electrophilicity and reactivity, with an increased aptitude for electron acquisition, enabling stronger adsorption onto the clay surface compared to the MG cations. These results highlight the capability of our clay as an effective and inexpensive adsorbent and pave the way for the decolorization of wastewater.

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The effect of Mg-Al substitution, particle size reduction, and thickness of BaFe12-2xMgxAlxO19 samples on increasing electromagnetic wave absorption

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Materials Today: Proceedings 2023年 80卷 704-709页

作者： Yustanti, Erlina Hafidzatul Hakimah, Vini Noviyanto, Alfian Randa, Maulana Manawan, Maykel Department of Metallurgical Engineering Faculty of Engineering Sultan Ageng Tirtayasa University Jl. Jend. Sudirman KM. 03 Banten Cilegon 42435 Indonesia Centre of Excellence Nanomaterial and Process Technology Laboratory Faculty of Engineering Sultan Ageng Tirtayasa University Jl. Jend. Sudirman KM. 03 Banten Cilegon 42435 Indonesia Advanced Materials Research Group Nano Center Indonesia Banten Jl. PUSPIPTEK Tangerang Selatan 15314 Indonesia Department of Mechanical Engineering Mercu Buana University Jl. Meruya Selatan Kebun Jeruk Jakarta 11650 Indonesia Research and Development Agency Indonesia Ministry of Defense Jl. Jati No.1 Pondok Labu Jakarta 12450 Indonesia Teknologi Daya Gerak Fakultas Teknologi Pertahanan Universitas Pertahanan RI. Kawasan IPSC Sentul Sukahati Kec. Citeureup Jawa Barat Kabupaten Bogor 16810 Indonesia

The synthesis of microwave-absorbing materials through a combined destruction process using mechanical alloying and ultrasonic vibration is significant due to its practical, waste-free scalability. Barium hexaferrite is the best candidate for synthesizing radar absorber materials through a combined destruction process. The substitution of Mg-Al on barium hexaferrite and decreasing particle size can increase the absorption of electromagnetic waves. Mixing stoichiometric precursors Sigma Aldrich 99 % BaCO3, Fe2O3, Al2O3, and MgO through wet milling for 20 h, followed by sintering at 1200 °C for 2 h to grow crystal embryos. Mechanical alloying was used to create the single-phase BaFe12-2xMgxAlxO19 (x = 0;0.3;0.5;0.7). re-milling for 20 h and ultrasonic vibration for 2 h reduced the particle size of the Mg-Al reinforced barium hexaferrite crystalline material. The increase in Mg-Al substitution in barium hexaferrite does not change the hexagonal structure but increases the density and absorption of electromagnetic waves. Mg-Al substitution at x = 0.3 resulted in uniform average particle size of 211.8 nm with a narrow particle size distribution, resulting in the lowest reflection loss of −17.62 dB at 8.2 GHz. This research increases the absorption ability of BaFe11.4Mg0.3Al0.3O19 electromagnetic waves up to 98 %. © 2022

关键词： Mechanical alloying

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Synergy Analysis of Industrial, research and University Training Centers Collaboration: A Case Study in Thailand's Eastern Economic Corridor

Synergy Analysis of Industrial, Research and University Trai...

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Portland International Conference on Management of Engineering and Technology (PICMET)

作者： Udom Lewlomphaisarl Ukrit Pungjitwisut Wassana Pullpol Kumpee Suksomboon Arnuphap Dowrueng Industrial IoT and Automation Research Group (IIARG) Sustainable Manufacturing Center (SMC) Eastern Economic Corridor of Innovation (EECi) Rayong Thailand EEC Automation Park Faculty of Engineering Burapha University Chonburi Thailand Intelligent SCADA Technology Research Team (IST) Advanced Control and Electronics Research Group (ACERG) National Electronics and Computer Technology Center (NECTEC) Pathum Thani Thailand National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand

The Royal Thai Government has outlined a 20-year strategy to achieve high-income status by 2036. “Thailand 4.0” is guided by the concept of “Industry 4.0”, which aims to transform the country into an innovative, value-driven industry, with a focus on 12 areas such as Automation & Robotics, Aviation & Logistics, Biofuel & Biochemicals, and Digital. The development of Eastern Economic Corridor (EEC) lies at the heart of Thailand 4.0 scheme. The EEC is an area-based development initiative aimed at revitalizing the prestigious East Coast, where numerous business developers have experienced a rewarding investment journey and exceptional success over the past 30 *** paper introduces a synergy analysis of the 3-phase collaboration approach between the EEC Automation Park located on the campus of Burapha University as the main university in the EEC and the Sustainable Manufacturing Center (SMC) at Automation Robotics and Intelligent System (ARIPOLIS) in Eastern Economic Corridor of Innovation (EECi) with strong partners from industry e.g. Mitsubishi Electric Factory Automation (Thailand) Limited. This 3-phase approach:}{1. Build an island demonstrator, 2. Link production demonstration lines and 3. Transfer to 100 factories in the EEC helps managers realize possible difficulties and systematically prepare solutions in advance.

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Convolution Short-Time Passenger Flow Prediction Model of Urban Rail Transit Considering Interpretability

Convolution Short-Time Passenger Flow Prediction Model of Ur...

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Prognostics and System Health Management Conference (PHM-Qingdao)

作者： Xue Yu Qin Yong Guo Jianyuan Sun Xuan Zheng Xuanchuan Wang Yaguan State Key Laboratory of Advanced Rail Autonomous Operation Beijing Jiaotong University Beijing China State Key Laboratory of Advanced Rail Autonomous Operation Key Laboratory of Railway Industry of Proactive Safety and Risk Control Beijing Jiaotong University Beijing China Beijing Urban construction Design and Development Group Co. LTD School of Traffic and Transportation Beijing Jiaotong University Beijing China Beijing Metro Operation Co. LTD Technology Innovation Research Institute branch Beijing China

ISBN: (数字)9798350354010

ISBN: (纸本)9798350354027

This study focuses on the passenger flow prediction in subway stations, especially in the micro-network scenario. We use Granger causality analysis method and deep learning model to explore the relationship of passenger flow, which improves the accuracy and interpretability of short-term prediction of urban rail transit passenger flow. Based on the analysis of temporal and spatial causality of monitoring points, a convolution short-time passenger flow prediction model (ICCM-URTPFP model) of urban rail transit causality considering interpretability was constructed, and compared with the traditional model, which verified its advantages in passenger flow prediction.

关键词： Rails Deep learning Analytical models Convolution Cause effect analysis Predictive models Reliability Prognostics and health management Public transportation Monitoring

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Advancements in Amorphous Oxides For Electrocatalytic Carbon Dioxide Reduction

Materials Today Catalysis

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Materials Today Catalysis 2024年 7卷

作者： Meng, Youcai Ding, Junyang Liu, Yifan Hu, Guangzhi Feng, Yanhong Wu, Yinghong Liu, Xijun MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials School of Resources Environment and Materials Guangxi University Nanning530004 China Institute of Advanced Science Facilities Guangdong Shenzhen518107 China Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science Yunnan University Kunming650504 China National Engineering Research Center of Green Recycling for Strategic Metal Resources Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Group Department of Health Sciences and Technology ETH Zürich Zürich8008 Switzerland

Electrocatalytic CO2 reduction (ECR) is a crucial energy conversion technology that transforms CO2 into value-added chemicals, reducing reliance on fossil fuels and advancing energy transitions. Designing high-performance catalysts is pivotal for widespread adoption of CO2 reduction reactions, aiming for high activity, selectivity, and stability. Amorphous oxides represent a burgeoning frontier in this field, attracting attention due to their abundant active sites that refine the catalyst structure-performance relationship. This paper aims to provide an overview of recent advances in using amorphous oxides for ECR. We begin by introducing the basic theory of electrocatalytic CO2 reduction, followed by discussing current synthesis approaches for amorphous oxides in CO2 reduction, focusing on optimization strategies for these catalysts. Finally, we address challenges and future perspectives of amorphous oxides in ECR, aiming to foster the development of more efficient catalyst designs. © 2024 The Authors

关键词： Catalyst selectivity

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Study on water purification with warm and cold season aquatic plants

Study on water purification with warm and cold season aquati...

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作者： Jiajun Sun Yajie Zhang Guangyu Ma Junhong Xiao Yajing Cai Zhi Wang Hongbin Cao Beijing Engineering Research Center of Process Pollution Control Institute of Process EngineeringChinese Academy of Sciences University of Chinese Academy of Sciences China Xiong'an Group Co.Ltd College of Environmental Science and Engineering Beijing Forestry University Environmental Development Center of the Ministry of Ecology and Environment

As a national key protection and restoration project, ecological restoration of Baiyangdian Wetland has an important significance for environmental management. As the research area in Zaozhadian wetland,the purification effect of warm season and cold season aquatic plants was studied under different overflying water qualities. It provides a theoretical and experimental basis for the ecological environment restoration and management of wetlands. The results showed that the warm season and cold season aquatic plants all played important roles on the nitrogen and phosphorus removal and maintained the stable water environmental from the nutrient release from soil. The warm season plant-mixed Myriophyllum spicatum and Ceratophyllum demersum and the cold season plantPotamogeton crispus L. can be reasonably configurated for the wetland restoration.

关键词： Study on water purification with warm and cold season aquatic plants

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A multi-physical field coupling modeling incorporated the non-thermal effect: carbothermic reduction of ZnFe2O4 by using microwave heating

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Energy 2025年 328卷

作者： Xiong, Yuandong Qiu, Dejin Li, Ang Omran, Mamdouh Ren, Jie Lu, Chunyang Yao, Hao Li, Manqing Xie, Hao Yu, Yaowei State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and Engineering Shanghai University 99 Shangda Rd Shanghai China Process Metallurgy Research Group Faculty of Technology University of Oulu Oulu Finland Zhenjiang Innovation and Development Research Institute Nanjing Normal University Zhenjiang China

Microwave heating has recently gained significant attention and is increasingly applied in the pyrometallurgical recovery of Zn (ZnFe2O4) from electric arc furnace dust (EAFD). Under microwave irradiation, a portion of the microwave energy is stored within molecules, enhancing the carbothermic reduction (non-thermal effect). However, quantifying the influence of the non-thermal effect in experiments remains challenging due to the invisibility of microwaves. For advancing the scalability of microwave-assisted EAFD processing, the present study focuses on ZnFe2O4 and develops a multiphysics model incorporating the non-thermal effect to elucidate the enhancement mechanism of microwaves on the reduction process. The main conclusions indicate that increasing microwave input power and graphite addition effectively enhances both the heating and reaction efficiency of the ZnFe2O4-graphite mixture. Higher power input improves efficiency while mitigating thermal runaway risks more effectively than increasing graphite addition. However, the uneven distribution of microwaves leads to localized thermal effects, impacting heating uniformity and overall reaction consistency within the mixture. Furthermore, non-isothermal kinetic analysis reveals that microwave irradiation enhances the carbothermic reduction of ZnFe2O4 through both thermal and non-thermal effects. With a stoichiometric coefficient of 1.2 for graphite addition, localized thermal and non-thermal effects reduce the apparent activation energy by 34.3 % and 25.8 %, respectively. © 2025 Elsevier Ltd

关键词： Activation energy

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The effect of Mg-Al substitution, particle size reduction, and thickness of BaFe12-2xMgxAlxO19 samples on increasing electromagnetic wave absorption

The effect of Mg-Al substitution, particle size reduction, a...

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作者： Yustanti, Erlina Hafidzatul Hakimah, Vini Noviyanto, Alfian Randa, Maulana Manawan, Maykel Department of Metallurgical Engineering Faculty of Engineering Sultan Ageng Tirtayasa University Jl. Jend. Sudirman KM. 03 Banten Cilegon42435 Indonesia Centre of Excellence Nanomaterial and Process Technology Laboratory Faculty of Engineering Sultan Ageng Tirtayasa University Jl. Jend. Sudirman KM. 03 Banten Cilegon42435 Indonesia Advanced Materials Research Group Nano Center Indonesia Banten Jl. PUSPIPTEK Tangerang Selatan15314 Indonesia Department of Mechanical Engineering Mercu Buana University Jl. Meruya Selatan Kebun Jeruk Jakarta11650 Indonesia Research and Development Agency Indonesia Ministry of Defense Jl. Jati No.1 Pondok Labu Jakarta12450 Indonesia Teknologi Daya Gerak Fakultas Teknologi Pertahanan Universitas Pertahanan RI. Kawasan IPSC Sentul Sukahati Kec. Citeureup Jawa Barat Kabupaten Bogor16810 Indonesia

关键词： Mechanical alloying

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Impacts of β-cyclodextrin bead polymer (BBP) treatment on the quality of red and white wines: Color, polyphenol content, and electronic tongue analysis

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LWT 2023年 176卷

作者： Fliszár-Nyúl, Eszter Zinia Zaukuu, John-Lewis Szente, Lajos Kovacs, Zoltan Poór, Miklós Department of Pharmacology Faculty of Pharmacy University of Pécs Rókus u. 2 PécsH-7624 Hungary Food Biotechnology Research Group János Szentágothai Research Centre University of Pécs Ifjúság útja 20 PécsH-7624 Hungary Department of Food Science and Technology College of Science Kwame Nkrumah University of Science and Technology Kumasi00233 Ghana CycloLab Cyclodextrin Research & Development Laboratory Ltd. Illatos út 7 BudapestH-1097 Hungary Department of Measurements and Process Control Institute of Food Science and Technology Hungarian University of Agriculture and Life Sciences Somlói út 14-16 BudapestH-1118 Hungary

Cyclodextrin (CD) polymers have been tested to be suitable candidates to remove certain harmful compounds (e.g., mycotoxins) from aqueous matrices, including different beverages. However, the impacts of CD polymers on wine quality have been barely characterized yet. Therefore, in the present work, we aimed to examine the effects of increasing concentrations of insoluble (but water-swellable) β-CD bead polymer (BBP) on the quality of red and white wines. We evaluated the BBP-induced changes in the color, the total polyphenol content as well as in the trans-resveratrol and quercetin concentrations of wine samples. Furthermore, e-tongue analyses were also performed as a highly sensitive tool to examine the influence of BBP on the taste of wines. Our results demonstrate that lower (5–10 mg/mL or below) concentrations of BBP induced typically minor changes in the color, total polyphenol content, or taste of wines tested. However, the concentrations of certain polyphenols (e.g., trans-resveratrol and quercetin) can be markedly affected. © 2023 The Authors

关键词： Wine

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Implementation of adaptive fault-tolerant tracking control for robot manipulators with integral sliding mode

Research Square

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research Square 2021年

作者： Liu, Linzhi Zhang, Liyin Hou, Yinlong Tang, Dafeng Liu, Hui Xi’an Key Laboratory of Advanced Control and Intelligent Process School of Automation Xi’an University of Posts and Telecommunications Xi’an China China Ship Scientific Research Center China China State Shipbuilding Corporation Limited Xi’an Dong Yi Science Technology and Industry Group Co. Ltd Xi’an China

This paper addresses an adaptive fault-tolerant tracking control for robot manipulators. By fully considering the effects of uncertainties and actuator effectiveness faults (UAEFs), a robust fault-tolerant tracking control combining with an auxiliary function and an integral sliding manifold is first developed for uncertain robot manipulators. Then, an adaptive law for unknown parameters of the upper bounded uncertainties is constructed to obtain a robust fault-tolerant approach with the elimination of the reaching phase of sliding mode control (SMC). The stability of the proposed approaches is accomplished by Lyapunov stable theory. The key contributions of the proposed approach are as follows: i) the reaching phase of SMC is removed in the control design and then the sliding mode starts at very beginning;(ii) the nominal control term is eliminated in the design of integral sliding surface and then the algebraic loop problem is also avoided in the proposed approach for robot manipulators;(iii) the simple control structure with an adaptive law is obtained for improving chattering-restraining ability of the proposed approach and then the effects of time delay and computational burden are also restrained from the proposed approach. Simulation and experimental comparisons have been accomplished for verifying the effectiveness of the proposed approach. © 2021, CC BY.

关键词： Sliding mode control

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