E3S Web of Conferences最新文献

{"title":"Rapid Analysis of Heavy Metal Element Adsorption by SCG Based on LIBS Technology","authors":"Hairui Xie, Libing You, Xiaodong Fang, Leyi Li, Haokai Ding, Zhengqi Zhou, Guanyang Zhang, Dongjian Zhang","doi":"10.1051/e3sconf/202561502010","DOIUrl":"https://doi.org/10.1051/e3sconf/202561502010","url":null,"abstract":"","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"615 1","pages":"02010"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomass carbon aerogel modified cathodes for high-efficiency removal of Roxithromycin in water by electro-Fenton method","authors":"Yunfei Wang, Xiaoyuan Gao, Pingnan Zhao, Qiang Ye","doi":"10.1051/e3sconf/202563001005","DOIUrl":"https://doi.org/10.1051/e3sconf/202563001005","url":null,"abstract":"The present study investigates the fabrication of carbon aerogel, utilising corn stover as a primary constituent by employing the freeze-drying-carbonization method for the purpose of modifying cathode materials for the electro-Fenton method. The experimental study investigated the removal of a pharmaceutical substance, roxithromycin, using carbonation temperature and current intensity as the independent variables. The research findings demonstrated that carbon aerogel electrodes, subjected to different carbonization temperatures, possess a distinctive three-dimensional mesh architecture. Furthermore, it was observed that both the degree of graphitization and the presence of unsaturated carbon structures within the material intensified as the carbonization temperature was elevated. Under optimal experimental conditions (10 mA/cm2 electrical density and 600℃ carbonisation temperature), the removal rate of roxithromycin reached 75.06%. This research offers innovative concepts and techniques for harnessing organic remediation using the electro-Fenton process.","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"630 1","pages":"01005-01005"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/30/e3sconf_epemr2025_01005.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of zeolitic imidazole framework (ZIF-8) catalyst for potential biodiesel production from waste cooking oil (WCO)","authors":"X. Chai, Law Yong Ng, Ching Yin Ng, Jia Huey Sim, Ying Pei Lim, Josephine Ying Chyi Liew","doi":"10.1051/e3sconf/202560303006","DOIUrl":"https://doi.org/10.1051/e3sconf/202560303006","url":null,"abstract":"Heteropoly acids (HPAs) catalysts prove effective in waste cooking oil biodiesel production, considering their high density of Brønsted acidic sites, exhibit significant resilience to elevated levels of free fatty acid (FFA) and moisture content. However, the separation of HPA catalysts after biodiesel production is challenging due to their homogeneous catalytic nature. This study aims to develop magnetic vanadium-substituted HPAbased ZIF-8 composites to create a catalyst for biodiesel production from WCO that is more efficient and easier to separate. In this work, a range of analytical methods was utilized to characterize the catalyst, such as Fouriertransform infrared spectroscopy (FTIR), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX), highresolution transmission electron microscopy (HRTEM), and a vibrating sample magnetometer (VSM). The successful incorporation of HPA acid into the magnetite ZIF-8 nanocomposite was indicated by prominent bands in the FTIR analysis, and this formation was further validated by EDX analysis. The VSM results also revealed that the nanocomposite has good magnetic responsiveness, facilitating catalyst separation and recycling. The magnetic ZIF-8 composites functionalized with H 6 PV 3 MoW 8 O 40 demonstrated significant potential for sustainable biodiesel production from WCO.","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"603 1","pages":"03006-03006"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/03/e3sconf_isgst2024_03006.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screening Key Factors in the Preparation of Alkaline-Based Adsorbents for Amoxicillin Removal Using Design of Experiments","authors":"Ya Mohammad Nazir Syah Ismail, Norzita Ngadi","doi":"10.1051/e3sconf/202563502001","DOIUrl":"https://doi.org/10.1051/e3sconf/202563502001","url":null,"abstract":"Pharmaceutical contaminants, such as amoxicillin, are persistent pollutants in wastewater and resist conventional treatment methods, posing environmental challenges. This study explores glycerol pitch, a biodiesel by-product, as a sustainable precursor for synthesizing polymerized adsorbents. Sodium hydroxide (NaOH), potassium hydroxide (KOH), and lithium hydroxide (LiOH) were evaluated as catalysts for glycerol polymerization, with NaOH-based adsorbents demonstrating the highest amoxicillin removal efficiency. To identify the key factors influencing adsorption performance, a two-factorial experimental design was employed, investigating polymerization temperature, polymerization time, alkali concentration, activation temperature, and activation time. A total of 32 experimental runs confirmed calcination temperature and time as the most significant parameters affecting amoxicillin removal, achieving efficiencies of up to 14.43%. These findings validate the critical parameters for adsorbent preparation, forming the basis for subsequent optimization using response surface methodology (RSM). The study underscores the potential of NaOH-catalyzed glycerol-derived adsorbents as cost-effective and sustainable solutions for pharmaceutical wastewater treatment, contributing to waste valorization and environmental sustainability.","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"635 1","pages":"02001-02001"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Dyes Adsorption Separation Membrane Via Post-Thermal Annealing Mediated Phase Inversion of Sulfonated Polyarylene Ethers Copolymers","authors":"Liao‐Ping Cheng, Yunfei Li","doi":"10.1051/e3sconf/202561502008","DOIUrl":"https://doi.org/10.1051/e3sconf/202561502008","url":null,"abstract":"A sulfonated polyarylene ether random copolymer (abbreviated as Ao-S) has been synthesized and further converted into porous membranes via the classical non-solvent induced phase separation (NIPS) technique. Then, the structure, morphology, thermal properties was analyzed by several characterization equipment. More importantly, it is found that the post thermal annealing effectively enhances the organic solvent resistance of Ao-S porous membranes. The performance tests indicate that the Ao-S membranes are effective in separating the model dyes of rhodamine (Rhb) dissolved in isopropanol (IPA) solution and the heat treatment temperature of 240°C is the optimized one for improving the separation of dyes due to the combined effect of pore trapping and physical adsorption at the active sites of the polymer matrix. Basically, the current work opens new way to design and fabricate the organic solvent resistant separation membranes.","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"615 1","pages":"02008-02008"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/15/e3sconf_eppc2025_02008.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soft-switching dual Active Bridge Converter-based Bidirectional On-Board Charger for Electric Vehicles under Vehicle-to-Grid and Grid-to-Vehicle Control Optimization","authors":"Venkateshwarlu Sonnati, Sairaj Arandhakar, K.S.V. Phani Kumar","doi":"10.1051/e3sconf/202447201021","DOIUrl":"https://doi.org/10.1051/e3sconf/202447201021","url":null,"abstract":"Electric Vehicles (EVs) are rapidly replacing conventional fuel vehicles, offering powerful, emission-free performance. This paper introduces an innovative three-phase bidirectional charger for Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) applications, strengthening the connection between EVs and the power grid. The charger employs a two-stage power conversion approach with advanced converters and a simplified dq-based charging control strategy. An efficient AC-DC converter facilitates smooth transitions between modes, responding to grid directives for active and reactive power. A Soft Switching Dual Active Bridge (SS-DAB) DC-DC converter optimally interfaces with the EV battery pack, while dual active LCL filters suppress harmonics, enhancing system performance. Simulated results confirm the charger’s effectiveness in a 3.5kW prototype using MATLAB/Simulink.","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"27 9‐10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140444971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Systematic Review and Psychometric Appraisal of Instruments Measuring Tuberculosis Stigma in Sub-Saharan Africa.","authors":"Alanna J Bergman, Katherine McNabb, Jason E Farley","doi":"10.1037/sah0000328","DOIUrl":"10.1037/sah0000328","url":null,"abstract":"<p><p>Tuberculosis (TB) stigma is one barrier to TB testing, treatment uptake and treatment completion. Therefore, stigma measurement must be approached through rigorous scientific methodology in order to accurately and reliably estimate the impact of TB stigma on treatment outcomes. The aim of this systematic review is to evaluate the methods and instruments used to measure TB stigma and interrogate strategies used to culturally validate measures of TB stigma in global research. Two reviewers used the PRISMA method to extract and analyze the existing body of literature on TB stigma in Sub-Saharan Africa. A thorough search was performed using three data bases generating 2,302 independent studies. After systematic screening, this review includes 28 studies. Of those studies, 13 used a psychometrically validated instrument while 15 used informal questionnaires or proxy variables to measure stigma. Psychometric appraisal was limited due to the number of studies that measured stigma using unvalidated questionnaires or proxy variables. The <i>Patient and Community Perceptions of TB scales</i> validated by Van Rie et al. were the most commonly used instruments to measure TB stigma; additionally, many instruments were not culturally or linguistically validated in Sub-Saharan Africa. Our appraisal emphasizes the need for reliable and valid instruments to measure TB stigma in low- and middle-income countries most affected by TB.</p>","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"1 1","pages":"81-93"},"PeriodicalIF":3.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10901500/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79908102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A weighted Jackknife approach utilizing linear model based-estimators for clustered data.","authors":"Ruofei Du, Ye Jin Choi, Ji-Hyun Lee, Ounpraseuth Songthip, Zhuopei Hu","doi":"10.1080/03610918.2022.2039396","DOIUrl":"10.1080/03610918.2022.2039396","url":null,"abstract":"<p><p>Small number of clusters combined with cluster level heterogeneity poses a great challenge for the data analysis. We have published a weighted Jackknife approach to address this issue applying weighted cluster means as the basic estimators. The current study proposes a new version of the weighted delete-one-cluster Jackknife analytic framework, which employs Ordinary Least Squares or Generalized Least Squares estimators as the fundamentals. Algorithms for computing estimated variances of the study estimators have also been derived. Wald test statistics can be further obtained, and the statistical comparison in the outcome means of two conditions is determined using the cluster permutation procedure. The simulation studies show that the proposed framework produces estimates with higher precision and improved power for statistical hypothesis testing compared to other methods.</p>","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"1 1","pages":"1048-1067"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10959512/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79826407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exercise Improves Physical Capacity, Cognition, Quality of Life and Promotes Neurotrophic Factors in Patients with Multiple Sclerosis.","authors":"Mehmet Açık, Seçkin Şenışık, Dilek Taşkıran, Tolga Akşit, Ramazan Aydınoğlu, Ayşe Nur Yüceyar","doi":"10.29399/npa.28302","DOIUrl":"10.29399/npa.28302","url":null,"abstract":"<p><strong>Introduction: </strong>We aimed to determine the effect of regular exercise on aerobic capacity, strength values, and plasma levels of Nerve Growth Factor (NGF) and Neurotrophin-3 (NT-3) in patients with multiple sclerosis (MS) and investigate its effects on MS symptoms including cognitive impairment, fatigue, balance disorders, and quality of life (QOL).</p><p><strong>Methods: </strong>Forty-three relapsing-remitting MS patients with an Expanded Disability Status Scale (EDSS) score of 4 or less participated in the study. Participants were divided into three groups: aerobic group, strength group, and control group. The patients in the exercise groups had exercise programs three days a week for three months. Aerobic capacity (maximum VO₂ value), strength measurements, and balance tests were done, and NGF and NT-3 plasma levels were analyzed in all participants at the beginning and end of the study. Multiple Sclerosis Quality of Life-54 (MSQoL-54), fatigue impact scale, Pittsburgh Sleep Quality Index (PSQI) and, to evaluate cognitive functions, BICAMS scale were applied.</p><p><strong>Results: </strong>Aerobic exercise and strength exercise groups had significant increases in VO₂ max, back and leg strength values, and NGF and NT-3 plasma levels (p<0.01). Cognitive functions, fatigue, sleep quality, and QOL significantly improved in the exercise groups (p<0.01). The balance values were also significantly improved in the aerobic group (p<0.01), and althoughimprovement although improvement was observed in the strength group, it was not statistically significant (p>0.05).</p><p><strong>Conclusions: </strong>Our study provides evidence that regular exercise improves quality of life, cognitive functions, fatigue, and sleep quality in MS patients. The levels of NGF and NT-3, which are important factors in neural regeneration and remyelination, were increased post exercise. It can be suggested that exercise may have a potential effect on MS and slow down the disease process with these results.</p>","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"1 1","pages":"335-343"},"PeriodicalIF":1.1,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10709708/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79832347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modified boron-carbon nanotubes as effective sensor devices for environmental pollution control","authors":"E. Dryuchkov, Irina Zaporotskova, D. Zvonareva","doi":"10.1051/e3sconf/202341903005","DOIUrl":"https://doi.org/10.1051/e3sconf/202341903005","url":null,"abstract":"In this article, a theoretical study of the sensing properties of a functionalized amino-group boron-carbon nanotube of the zig-zag type (6.0) containing equal amounts of carbon and boron is discussed. Such a nanotube could act as an element of a sensor device for environmental protection. The simulation was performed within a molecular cluster model using the DFT computational method, the B3LYP functional and the 6-31G basis set. The main characteristics of nanotube functionalization, its sorption and sensory activity with respect to the alkali metal atoms Li, Na, and K are obtained. It is concluded that the system can be used to detect the presence of alkali metal atoms.","PeriodicalId":11445,"journal":{"name":"E3S Web of Conferences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57816970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}