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Temporal hydrogeochemical evolution of surface water and groundwater in a karst system discharging into a continental-type Ramsar site in the Huasteca Potosina, Mexico

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Environmental Science and Pollution Research 2025年第7期32卷 3912-3950页

作者： Del Carmen Cordova Molina, Cynthia Ortiz Enriquez, Octavio Alfaro-De la Torre, Ma. Catalina Reyes Agüero, Juan Antonio Cardona Benavides, Antonio Multidisciplinary Graduate Program in Environmental Sciences Autonomous University of San Luis Potosi Av. Manuel Nava 201 SLP San Luis Potosí Mexico Engineering Faculty Autonomous University of San Luis Potosi Research and Postgraduate Center Av. Manuel Nava 8 SLP San Luis Potosí Mexico Faculty of Chemical Sciences Autonomous University of San Luis Potosi Av. Manuel Nava 8 SLP San Luis Potosí Mexico Desert Areas Research Institute Autonomous University of San Luis Potosi Altair 200 Col. del Llano SLP San Luis Potosí Mexico Earth Sciences Engineering Faculty Autonomous University of San Luis Potosi Av. Manuel Nava 8 SLP San Luis Potosí Mexico

Ecosystems such as wetlands have karst groundwater as their primary source of preserving their services and functions. Karst systems are complex hydrogeological systems that are difficult to study because of their complicated functioning mechanism, which requires an interdisciplinary effort based on hydrodynamic assessment and characterization of the hydrogeology of the system. The study area is the Ramsar wetland Ciénaga de Tamasopo (Mexico), which is dependent on the discharge of karst groundwater that is affected by water extraction of extensive sugarcane agriculture and is also the main water source for the rural towns. Hydrogeochemical and isotopic tools further suggest that at least two distinct sources contribute to the groundwater composition in the Ciénaga de Tamasopo basin. One corresponds to meteoric water recharging the aquifer through karst structures of the El Abra Fm. and Tamasopo Fm. inferring a local flow with an isotopic composition of δ18O (− 4.75 to − 4.20‰) and δ2H (− 29.12 to − 23.86‰). The second is associated with regional-intermediate flow, indicating that the water has an enrichment of heavy δ18O (− 6.90 to − 6.65‰) and δ2H (− 41.37 to − 40.41‰) isotopes circulating in the Guaxcamá Fm. EC and temperature variations were evaluated, determining that the EC tends to increase in the rainy season because of the mixing of local and intermediate flows and that there is evidence of temperature increase. The chemical analysis identified the dominant processes in this karst system as dissolution–precipitation of calcite, dolomite, and gypsum by water–rock interaction, mixing, and evaporation. This study facilitated the development of a conceptual model for understanding groundwater movement in warm and sub-humid climate karst systems. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Wetlands

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Intensification of Palladium Membrane Separators and Reactors by Applied Electric Field: A Multi-Scale Modeling study

SSRN

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SSRN 2025年

作者： Dawidowicz, Rimon Tereshchuk, Polina Patrascu, Michael Faculty of Chemical Engineering Technion Israel Institute of Technology Haifa3200003 Israel Grand Technion Energy Program Technion Israel Institute of Technology Haifa3200003 Israel

Pd-based membranes have a great potential for efficient production of pure hydrogen, enabling effective small-scale hydrogen production. Co-adsorption of gas phase species, mainly CO, is known to significantly limit the hydrogen flux through these expensive membranes. In this study, we employ a multi-scale modeling approach to investigate the impact of an applied electric field (AEF) on Pd-based membrane separators and reactors. We estimate the molecular-scale adsorption energies of CO and hydrogen on the Pd surface under AEF using DFT calculations. These are then used in unit-scale simulations of Pd-membrane separators and reactors. DFT simulations revealed that the AEF significantly changes the adsorption energy of CO due to its polarity, while unaffecting the nonpolar H2. A negative electric field of -1 V/Å reduces the adsorption energy of CO by 0.26 eV. Conversely, a positive field increases the adsorption energy of CO, resulting in a negative impact on the hydrogen flux. In a simple separator we found that a negative electric field of -1 V/Å significantly decreases the CO surface coverage (by up to 64 %) and increases the trans-membrane hydrogen flux by 2.5 times in some cases. In modeling a membrane reactor, we considered the impacts of the AEF on both competitive adsorption and equilibrium conversion. Ignoring the impact on equilibrium conversion, the model predicts a significant improvement in conversion of methane through steam reforming at 550 ◦C, from 35 % to 70 %. However, we calculate that the electric field significantly reduces the equilibrium conversion of the steam reforming reactions. It is thus desired to design a system in which the electric field is strong only close to the membrane surface. © 2025, The Authors. All rights reserved.

关键词： Separators

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Cigarette butt filter as membrane material with tannic acid and FeCl₃ additives for improve antifouling properties

Case Studies in Chemical and Environmental Engineering

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Case Studies in chemical and Environmental engineering 2025年 11卷

作者： Luthfiana, Anisa Mulyati, Sri Arahman, Nasrul Bilad, Muhammad Roil Aulia, Muhammad Prayogie Doctoral Program School of Engineering Science Universitas Syiah Kuala Banda Aceh Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh Indonesia Department of Chemical and Process Engineering Faculty of Integrated Technologies Universiti Brunei Darussalam Bandar Seri Begawan Brunei Darussalam Department of Chemical Science and Engineering Kobe University Kobe Japan

Membrane fouling remains a critical challenge in wastewater treatment, particularly in applications involving oil-water emulsions. This study addresses this issue by fabricating antifouling membranes from repurposed cigarette filter waste, modified with tannic acid and FeCl₃ (ferric chloride) coatings. These modifications enhance membrane hydrophilicity, antifouling properties, flux recovery, and selectivity through an environmentally friendly approach. The membranes were prepared using the non-solvent induced phase separation (NIPS) method and subsequently coated through vacuum filtration. Key performance metrics included pure water flux, oil emulsion selectivity, and antifouling properties. The antifouling mechanism was attributed to the hydrophilic and protective layers formed by the tannic acid and FeCl₃ modifications, which reduced fouling and improved flux recovery. Characterization revealed that the tannic acid and FeCl₃ modifications created a hydrophilic layer with uniform pore distribution, leading to an oil rejection rate of up to 97 % and an increased flux recovery ratio of 85 %, compared to 65 % in unmodified membranes. The results highlight the potential of waste-derived membranes as a sustainable alternative for industrial wastewater treatment, aligning with the principles of circular economy and green chemistry. Future work should explore long-term stability, surface charge effects, and optimization of additive concentrations to enhance performance and antifouling efficiency further. © 2025 The Authors

关键词： Antifouling membrane Cigarette filter waste FeCl3 Oil-water emulsion tannic acid

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Innovative web-based microteaching model: To improve the teaching skills of prospective informatics teachers in vocational high schools

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Social Sciences and Humanities Open 2025年 11卷

作者： Sugihartini, Nyoman Elmunsyah, Hakkun Nurhadi, Didik Rahmawati, Yuni Vocational Education Doctoral Program Post Graduate School Universitas Negeri Malang Malang Indonesia Informatics Education Study Program Department of Informatics Faculty of Engineering and Vocational Universitas Pendidikan Ganesha Bali Indonesia

Prospective informatics teachers in vocational schools (VS) must master content knowledge, pedagogical skills, and technology integration to achieve learning goals. Therefore, informatics teachers in VS need to innovate to increase students' creativity. However, many prospective informatics teachers experience difficulties in this regard. This research aims to develop and implement the Web-Based Microteaching (WBM) model to improve the teaching skills of prospective informatics teachers at VS. This study uses research and development methods with the ADDIE model approach. The research results show that the WBM model effectively improves prospective informatics teachers' teaching skills, especially in planning lessons and practising basic teaching skills. This innovation is a relevant learning solution in the digital era and positively contributes to the professional development of informatics teachers. The WBM model is an innovation to provide a more intensive and structured practical experience by utilizing web technology as the main media. Through web-based learning, prospective teachers can access material, exercises and feedback independently, which is expected to accelerate pedagogical mastery. © 2025 The Authors

关键词： Microteaching model Prospective informatics teacher Teaching skills Vocational high schools Web-based

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Advancing pyrolysis of sewage sludge: Bibliometrics analysis, life cycle assessment, and circular economy insights

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Thermal Science and engineering Progress 2025年 63卷

作者： Abdul Hamed, Alia Syafiqah Munajat, Nur Farizan Rasit, Nazaitulshila Almanassra, Ismail W. Atieh, Muataz Ali Sayed, Khalid Aljomard, Haif Faculty of Ocean Engineering Technology Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia Faculty of Ocean Engineering Technology Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia Research Institute of Sciences and Engineering University of Sharjah SharjahPO Box 27272 United Arab Emirates Chemical and Water Desalination Engineering Program College of Engineering University of Sharjah SharjahPO Box 27272 United Arab Emirates Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor Bangi43650 Malaysia Biomass & Bioenergy Research Group Center for Sustainable Energy and Power Systems Research Research Institute of Science and Engineering University of Sharjah SharjahPO Box 27272 United Arab Emirates

Pyrolysis technology holds great potential for sustainable sewage sludge treatment due to its ability to recover energy, tackle the environmental challenges, and convert by-products into valuable resources. However, a comprehensive understanding of its research progression, sustainability implications, and policy relevance remains limited. This study offers a comprehensive analysis of sewage sludge (SS) pyrolysis research, integrating sustainability through life cycle assessment (LCA) and circular economy principles. Using Scopus and VOSviewer, it highlights significant growth in research, with publications rising in this decade, reflecting increasing global interest driven by environmental and technological imperatives. China dominates the field with 693 publications and extensive international collaborations, followed by the United States and Australia. Key journals play pivotal roles in disseminating findings, while interdisciplinary contributions span environmental science, energy, and chemical engineering. Keyword analysis reveals emerging trends such as circular economy, LCA, and carbon sequestration highlighting a growing focus on sustainable practices. LCA studies show that advanced pyrolysis technologies reduce greenhouse gas emissions, and align with United Nations Sustainable Development Goals. Circular economy analyses underscore the economic viability of co-pyrolysis, alongside substantial energy recovery and bio-oil market potential. Additionally, this study explores the key technological challenges and mitigation strategies crucial for optimizing SS pyrolysis systems and advancing future research. These findings underscore the adaptability of SS pyrolysis for waste valorization and its role in addressing environmental challenges. This analysis provides valuable insights for advancing research, informing policy, and optimizing industrial practices, highlighting SS pyrolysis as a critical technology for sustainable waste management and resource recovery

关键词： Sustainable development

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Development of hazelnut shell-derived biochar to support a bifunctional MoCo electrocatalyst for HER/OER in alkaline medium

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Biochar 2025年第1期7卷 1-18页

作者： Ñanculeo, Jaime Andreu, Teresa Sirés, Ignasi Ramírez, Andrés Cea, Mara Nahuelcura, Benjamín Valenzuela, Gerson Garrido-Miranda, Karla González, María Eugenia Doctoral Program in Engineering Sciences with Specialization in Bioprocesses University of La Frontera Av. Francisco Salazar 01145 Temuco Chile Departament de Ciència de Materials i Química Física Secció de Química Física Facultat de Química Universitat de Barcelona Martí i Franquès 1-11 Barcelona 08028 Spain Department of Chemical Sciences and Natural Resources Faculty of Engineering and Sciences University of La Frontera Av. Francisco Salazar 01145 Temuco 4780000 Chile Department of Chemical Engineering University of La Frontera Av. Francisco Salazar 01145 Temuco 4780000 Chile Scientific and Technological Bioresource Nucleus (BIOREN-UFRO) Universidad de La Frontera Av. Francisco Salazar 01145 Temuco 4780000 Chile

Hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), the two concurrent reactions for the electrolytic production of green H2, require low-cost and sustainable electrocatalysts for their scale-up, as... 详细信息

Hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), the two concurrent reactions for the electrolytic production of green H₂, require low-cost and sustainable electrocatalysts for their scale-up, as for example non-noble metals and carbonaceous structures with high surface area. Our hypothesis is that the activated-doped biochar decorated with Mo and Co provides high porosity and active site dispersion, enhancing HER and OER kinetics with low overpotentials and high stability in an alkaline medium. Here, a bifunctional Mo/Co electrocatalyst supported on N-doped biochar obtained from hazelnut shells has been developed, thus valorizing an agro-industrial residue of major importance in Chile. The activated biochar matrix, with interconnected hierarchical pores, offered a high surface area of 1102 m² g⁻¹ and I_D/I_G = 1.08 graphitization, while N-doping was observed by XPS, with the formation of N-pyridinic and N-graphitic functionalities that improved the catalytic performance. The addition of metals to the substrate allowed the formation of bimetallic Mo/Co active sites (Co₆Mo₆C), increasing the graphitization degree and improved the growth of these bimetallic sites. The electrocatalytic performance in the presence of the metals was good, revealing low overpotentials for HER (0.257 V) and OER (0.370 V) with low Tafel slopes (51 and 59 mV dec⁻¹, respectively) under alkaline conditions, also improving the electron transfer and stability. © The Author(s) 2025.

关键词： Bifunctional Biochar Electrocatalysts Green H2

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The Implementation of Occupational Safety and Health (OSH) in Practical Courses of the Electronics engineering Education study program, faculty of engineering, Yogyakarta State University

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Journal of Physics: Conference Series 2018年第1期1140卷

作者： M Munir S A Dewanto B Wulandari Electronics Engineering Education Study Program Faculty of Engineering Yogyakarta State University Indonesia

Occupational Safety and Health (OSH) is a part of the practical courses in educational institutions. This research was aimed at investigating: (1) students' knowledge of OSH used in practical courses, (2) students' attitudes toward OSH, and (3) the implementation of OSH in practical courses in the Electronics engineering Education study program, faculty of engineering, Yogyakarta State University. It is a non-experimental study employing a quantitative descriptive approach. This study was conducted in the Electronics engineering Education study program, faculty of engineering, Yogyakarta State University from February to June 2018. The subject of this study included students, lecturers, and technicians. Students' knowledge of OSH in practical courses in the Electronics study program is good (74.2%). Their attitudes toward OSH are also good (92.2%). Although some students do not implement OSH procedures when conducting practical courses, the implementation of OSH in the study program is categorized good (63.3%). Furthermore, more intensive studies on the importance OSH implementation in practical courses needs to done.

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Enhancing polyethersulfone membrane durability and stability through Eco-friendly green silica from natural kaolin for water treatment applications

Results in Engineering

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Results in engineering 2025年 26卷

作者： Mulyati, Sri Muchtar, Syawaliah Razi, Fachrul Ambarita, Aulia Chintia Luthfiana, Anisa Aulia, Muhammad Prayogie Bilad, Muhammad Roil Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Science Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Science and Engineering Kobe University 1-1 Rokkodai Nada Kobe 647-8501 Japan Faculty of Integrated Technologies Universiti Brunei Darussalam Jalan Tungku Link BE1410 Brunei Darussalam

Membrane technology is pivotal in addressing global water scarcity;however, issues such as membrane fouling and chemical degradation significantly hinder its operational efficiency and longevity. This study investigates the use of eco-friendly green silica derived from natural kaolin as an additive to enhance the performance of polyethersulfone (PES) membranes fabricated via the phase inversion method. Seven membrane compositions were developed, incorporating varying concentrations of both green silica and commercial silica, to allow a direct performance comparison. The membranes were systematically characterized for hydrophilicity, porosity, pore size distribution, and mechanical stability, while their filtration performance was evaluated in terms of water flux, humic acid (HA) rejection, fouling resistance, and chemical *** findings revealed that green silica enhanced membrane hydrophilicity and porosity at optimal concentrations, leading to improved fouling resistance and cleaning efficiency. Notably, the membrane containing 1 % green silica (M-K3) exhibited a high HA rejection rate of 98.37 % with a moderate water flux of 10.85 L/m²·h, balancing selectivity and permeability. In contrast, membranes containing 1 % commercial silica (M-S3) showed higher water flux (86.83 L/m²·h) but lower HA rejection (73.75 %), highlighting a trade-off. Green silica-modified membranes also demonstrated superior chemical stability, maintaining consistent performance under extended filtration and exposure to cleaning agents. These results underscore the potential of kaolin-derived green silica as a cost-effective, sustainable, and high-performance alternative to commercial additives in water treatment membranes. © 2025 The Author(s)

关键词： chemical stability Humic acid rejection antifouling Pes membrane Water flux

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chemical mechanical polishing as an alternative surface treatment technique for corrosion prevention of carbon steel in an acidic medium

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Scientific Reports 2025年第1期15卷 1-11页

作者： Ahmed, Mohamed Ali Al-Timimi, Buthainah Al-Ali, Maha Abdullah, Ghassan H. Khalaf Atiyaha, Safa Yaseen Ali Aljanabi, Ahmed Mel, Maizirwan Mechanical Engineering Department College of Engineering Tikrit University Tikrit Iraq Chemical Engineering Department University of Technology-Iraq Baghdad Iraq Chemical Engineering and Sustainability Department Faculty of Engineering International Islamic University of Malasiya (IIUM) Kuala Lumpur Malaysia Oil and Gas Refining Engineering Department College of Petroleum Process Engineering Tikrit University Tikrit Iraq Petroleum Systems Control Engineering Department College of Petroleum Processes Engineering Tikrit University Tikrit Iraq Modeling and Design Program Atilim University Ankara Turkey

chemical mechanical polishing (CMP) has been a standard technique in semiconductor manufacturing for achieving smooth surfaces. CMP utilizes a synergistic interplay of chemical and mechanical interactions to achieve the desired removal rates, selectivity, and ultimately planarity with different substrate materials. In this study, the impact of CMP on the surface properties of steel used in the petroleum industry was examined, with a focus on its corrosion behavior posttreatment. Steel samples were subjected to CMP with and without an oxidizer in a silica-based slurry, and their surface characteristics were compared to those of samples polished mechanically. The addition of an oxidizer to the slurry resulted in increased material removal rates and the formation of an oxide layer on the surface;this phenomenon was not observed in CMP without an oxidizer. However, in mechanical polishing, the action of silicon carbide grains on the steel surface led to an increase in the removal rate but caused a decrease in its corrosion resistance. Compared with other treatments, the oxide layer provided a good protective barrier against corrosion and improved the corrosion resistance of the steel substrate. Based on the results from the practical study, an improvement in the corrosion resistance properties was observed due to the chemical reaction of the oxidizer and the mechanical action of the silica nanoparticles;these results showed the importance of chemical mechanical polishing as an alternative method to reduce the corrosion of steel in acidic environments. Additionally, the effect of hydrogen peroxide in a silica slurry with respect to the wettability, surface roughness, and hardness of steel was examined using contact angle measurements, profilometry, scanning electron microscopy, and microhardness tests. © The Author(s) 2025.

关键词： chemical mechanical polishing Contact angle Electrochemical corrosion test Hydrogen peroxide oxidizer Immersion test Material removal rate Silica-based slurry Surface roughness

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Membrane derived from pineapple biowaste for water filtration in aquaculture environment: Effect of zinc oxide nanoparticle

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Case Studies in chemical and Environmental engineering 2025年 11卷

作者： Yanuhar, Uun Suryanto, Heru Wijaya, Husni Wahyu Binoj, Joseph Selvi Aminnudin, Aminnudin Caesar, Nico Rahman Osman, Azlin Fazlina Nusantara, Fajar Eqisetia Utari, Inpita Casuarina Study Program of Aquatic Resources Management Faculty of Fisheries and Marine Sciences Brawijaya University East Java Indonesia Centre Excellent for Cellulose Composite (CECCom) Department of Mechanical and Industrial Engineering Universitas Negeri Malang East Java Malang Indonesia Department of Chemistry Universitas Negeri Malang East Java Malang Indonesia Institute of Mechanical Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Saveetha University Chennai India Faculty of Chemical Engineering Technology Universiti Malaysia Perlis Malaysia

This study evaluates bacterial cellulose (BC) membranes reinforced with zinc oxide nanoparticles (ZnO-NP) derived from pineapple biowaste. While BC membranes are widely studied, their use in aquaculture and ZnO reinforcement remains underexplored. Membranes were synthesized with 0.25–1.0 wt% ZnO-NP and characterized by SEM, XRD, FTIR, tensile strength, antibacterial activity, filtration efficacy, and analysis using one-way ANOVA. Results showed ZnO-NP enhanced membrane crystallinity and tensile strength, with 0.25 wt% being optimal. The membranes exhibited improved antibacterial activity, reducing bacterial content by 90.6 % and contaminants by 57 %, enhancing water quality for aquaculture and supporting sustainability and the long-term viability of aquaculture. © 2025

关键词： Acetate membrane Antibacterial activity Bacterial cellulose Pineapple biowaste ZnO nanoparticle

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