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Enhanced Dye Adsorption and Bacterial Removal of Magnetic Nanoparticle-Functionalized Bacterial Cellulose Acetate Membranes

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Journal of Renewable Materials 2024年第9期12卷 1605-1624页

作者： Heru Suryanto Daimon Syukri Fredy Kurniawan Uun Yanuhar Joseph Selvi Binoj Sahrul Efendi Fajar Nusantara Jibril Maulana Nico Rahman Caesar Komarudin Komarudin Centre of Advanced Material for Renewable Energy(CAMRY) Universitas Negeri MalangMalang65145Indonesia Department of Mechanical and Industrial Engineering Universitas Negeri MalangMalang65145Indonesia Department of Food and Agricultural Product Technology Faculty of Agricultural TechnologyAndalas UniversityPadang25163Indonesia Department of Chemistry Institut Teknologi Sepuluh NopemberSurabaya60111Indonesia Study Program of Aquatic Resources Management Faculty of Fisheries and Marine ScienceBrawijaya UniversityMalang65145Indonesia Institute of Mechanical Engineering Saveetha School of EngineeringSaveetha Institute of Medical and Technical Sciences(SIMATS)Saveetha UniversityChennai602105India Faculty of Vocational Universitas Negeri MalangMalang65145Indonesia

Utilizing biomass waste as a potential resource for cellulose production holds promise in mitigating environmental *** current study aims to utilize pineapple biowaste extract in producing bacterial cellulose acetate-based membranes with magnetic nanoparticles(Fe_(3)O_(4)nanoparticles)through the fermentation and esterification process and explore its *** bacterial cellulose fibrillation used a high-pressure homogenization procedure,and membranes were developed incorporating 0.25,0.50,0.75,and 1.0 wt.%of Fe3O4 nanoparticles as magnetic nanoparticle for *** membrane characteristics were measured in terms of Scanning Electron Microscope,X-ray diffraction,Fourier Transform Infrared,Vibrating Sample Magnetometer,antibacterial activity,bacterial adhesion and dye adsorption *** results indicated that the surface morphology of membrane changes where the bacterial cellulose acetate surface looks *** crystallinity index of membrane increased from 54.34%to 68.33%,and the functional groups analysis revealed that multiple peak shifts indicated alterations in membrane functional ***,adding Fe_(3)O_(4)-NPs into membrane exhibits paramagnetic behavior,increases tensile strength to 73%,enhances activity against *** and ***,and is successful in removing bacteria from wastewater of the river to 67.4%and increases adsorption for anionic dyes like Congo Red and Acid Orange.

关键词： Bacterial cellulose dye adsorption Fe_(3)O_(4)nanoparticles membrane pineapple waste

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Mapping the Research Landscape : A Bibliometric study of Flow Rate Sensors and Horizontal Water Pipe

Mapping the Research Landscape : A Bibliometric Study of Flo...

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International Conference on Computing, engineering, and Design (ICCED)

作者： Anang Suryana Anggy Pradiftha Junfithrana Abd Kadir Mahamad Wahyu Mulyo Utomo Osep Hijuzaman Panji Narputro Faculty of Electrical and Electronics Engineering Universiti Tun Hussein Onn Malaysia Batu Pahat Malaysia Faculty of Electrical and Electronics Engineering Nusa Putra University Sukabumi Indonesia Industrial Engineering Study Program STT Wastukancana Bandung Indonesia Electrical Engineering Study Program Nusa Putra University Sukabumi Indonesia

ISBN: (数字)9798331529376

ISBN: (纸本)9798331529383

The significance of flow rate sensors and horizontal water pipes in various applications highlights their crucial role in enhancing fluid dynamics monitoring and management. This study aims to map the research landscape through a bibliometric analysis of flow rate sensors and horizontal water pipes. The analysis includes author analysis, affiliation analysis, country or territory analysis, source analysis, keyword analysis, trend topic analysis, and thematic map analysis. Bibliometric analysis helps policymakers, industry professionals, and researchers navigate the extensive body of literature, ensuring that efforts in flow rate sensor technology and horizontal water pipe research align with current trends and contribute effectively to advancing knowledge in these areas. The results will serve as a valuable guide, helping stakeholders understand the evolving research landscape, make informed decisions, and gain deeper insights into the trajectory of research in flow rate sensors and horizontal water pipes.

关键词： Industries Waste reduction Fluid dynamics System performance Bibliometrics Market research Sensors Trajectory Optimization Monitoring

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Echoes of Tradition: Virtual-Reality Media in Improving Spatial Space Experience 3D Virtual Tour of Kampung Adat Pulo Garut, West Java, Indonesia

Echoes of Tradition: Virtual-Reality Media in Improving Spat...

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STEM Education Conference (iSTEM-Ed), International

作者： M.F. Rahman A.Y. Permana I Susanti J. Akbardin K. Wijaya S. Handayani Architecture Study Program Faculty of Technology and Vocational Education Universitas Pendidikan Indonesia Bandung Indonesia Civil Engineering Study Program Faculty of Technology and Vocational Education Universitas Pendidikan Indonesia Bandung Indonesia Architecture Study Program Faculty of Civil Engineering and Planning Universitas Kebangsaan Republik Indonesia Indonesia Bandung Indonesia Agro-industrial Education Study Program Faculty of Technology and Vocational Education Universitas Pendidikan Indonesia Bandung Indonesia

ISBN: (数字)9798350365979

ISBN: (纸本)9798350365986

In the current digital era, virtual reality (VR) technology is rapidly expanding across various fields, including education and cultural preservation. This technology offers immersive opportunities to explore and experience architectural spaces, promising increased understanding and learning motivation. Despite being relatively new in Indonesia, the application of VR has shown significant potential for education and cultural preservation through the implementation of a 3D virtual tour in Kampung Adat Pulo Garut. Therefore, this research aimed to develop VR media to enhance users' spatial experience and preserve the cultural values of Kampung Adat Pulo Garut through interactive learning. The method used was Research and Development (R&D) through the Multimedia Development Life Cycle (MDLC) model. The equipment used was LiDAR Scanner FJD Trion P1 Series, DJI Mavic Air 2S Drone, and Sony A6000 Camera. The method used included aerial and terrestrial mapping, 3D modeling, and the development of virtual environments through Unreal Engine. The developmental process included various stages, namely concept, design, material collection, compilation, testing, and distribution. The result showed an interactive 3D virtual tour of Kampung Adat Pulo Garut, called “Echoes of Tradition.” Unreal Engine was found to enable detailed visualization of traditional architecture and village environments with high accuracy and interactivity. The final product offered an immersive learning experience, enriching users' experience, and enabling digital preservation of cultural heritage. The next step, to get an overview of the research results, used a questionnaire as an instrument which was distributed to a total of 250 respondents. Furthermore, the potential implication of VR in education and cultural preservation was identified, guiding similar applications in the future. By improving accessibility and engagement in spatial and cultural learning, VR offered new avenues in education and cultu

关键词： Visualization Three-dimensional displays Education Virtual environments Media User experience Cultural differences

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Sensing Performance Analysis of Mobile Robot Navigation Based on Depth Camera and Lidar

Sensing Performance Analysis of Mobile Robot Navigation Base...

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Computer Science, Information Technology and engineering (ICCoSITE), International Conference on

作者： Hadha Afrisal Aghus Sofwan Widayat Widayat R. Rizal Isnanto Electrical Engineering Department & Study Program of Professional Engineers Diponegoro University Semarang Indonesia Electrical Engineering Department Faculty of Engineering Diponegoro University Semarang Indonesia Study Program of Professional Engineers Faculty of Engineering Diponegoro University Semarang Indonesia

One of the potential implementations of mobile robots in mitigating the risk of communicable diseases is for delivering items and handling materials with no-human contact. In that scenario, mobile robots require the capability of performing simultaneous multi-object detection and distance estimation for dynamic exploration in a real-world environment. Some existing research papers have contributed to the development of object detection or distance estimation, separately. However, there is still a lack of studies on simultaneous multi-object detection and distance estimation for robot navigation, especially in terms of performance analysis of the integrated techniques. One of the most challenging issues of integrating multi-object detection and distance estimation is the validation and evaluation of the type of objects with their relevant estimated distance to the robot. For that reason, this research aims to analyze the mobile robot's sensing performance in integrated simultaneous multi-object detection and distance estimation during navigation scenarios. A depth camera of Intel RealSense D455 and a rotating LIDAR of Slamtec RPLidar A1M8 are utilized in the experiments. The result of experiments shows that the object detection algorithm using Mobilenet SSD V2 can perform an accuracy of 74%, with precision, recall, and F1-Score consecutively achieving 74,54%, 74,00%, and 74,22%. The multi-object distance estimator also performs satisfactory results with a low measurement average error of 10.3 cm for indoor experiments. The integrated multiobject detector and distance estimator system can work in a real-time mode of 30 FPS, thence significantly improving the navigation performance of the mobile robot.

关键词： Laser radar Navigation Robot vision systems Estimation Object detection Detectors Cameras

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Ag-decorated 3D flower-like Bi_(2)MoO_(6)/rGO with boosted photocatalytic performance for removal of organic pollutants

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Rare Metals 2021年第5期40卷 1086-1098页

作者： Xin Liu Wei-Ya Huang Qin Zhou Xi-Rong Chen Kai Yang Dan Li Dionysios D.Dionysiou Faculty of Materials Metallurgical and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China Environmental Engineering and Science Program Department of Chemical and Environmental EngineeringUniversity of CincinnatiCincinnatiOH 45221-0012USA College of Science HealthEngineering and EducationMurdoch UniversityMurdoch 6150Australia

A series of unique 3D flower-like Bi_(2)MoO_(6)(BMO)/reduced graphene oxide(rGO)heterostructured composites decorated with varying amounts of Ag nanoparticles(NPs)were *** morphological characteristics,structural features,energy band structures and photoelectrochemical properties were systematically *** the Ag/BMO/rGO ternary composites(AgBGy;y=1%,2%and 3%)demonstrated greater photocatalytic activity towards efficient removal of our selected organic models[methyl orange(MO),rhodamine B(RhB)and phenol],as compared with the BMO/rGO binary composites(BG-x;x=0.25,2,4 and 5).Particularly,AgBG-2%,which was synthesized with the addition of 2 wt% rGO and 2 wt%Ag in BMO,possessed superior photocatalytic *** fitted rate constants(k)for the photocatalytic degradation of RhB,MO and phenol using AgBG-2% were estimated to be 0.0286,0.0301 and 0.0165 min^(-1),respectively,which were over one order of magnitude greater than those obtained using pure *** factors may contribute to the observed enhancement,including greater specific surface area,enhanced light absorption,promoted spatial separation of electronhole(e^(-)-h^(+))pairs and their suppressed recombination,especially benefiting from the synergistic effects among BMO,rGO and Ag *** work suggests that the rational design of BMO/rGO/Ag ternary composite was an effective strategy to boost the photocatalytic activity of the resulting catalyst towards the highly efficient removal of organic pollutants from water.

关键词： Bi_(2)MoO_(6) Reduced graphene oxide Ag nanoparticles 3D flower-like morphology Photocatalytic degradation

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Effect of Temperature on Gasification of Biomass Using Zeolit 1

Effect of Temperature on Gasification of Biomass Using Zeoli...

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1st International Conference on Industrial Automation, Smart Grid and its Application, ICIASGA 2020

作者： Porawati, H. Kurniawan, A. Yuliwati, E. Study Program of Mechanical Engineering Politeknik Jambi Jambi Indonesia Graduate Program of Chemical Engineering Universitas Muhammadiyah Palembang Indonesia Program Study of Chemical Engineering Faculty of Engineering Universitas Muhammadiyah Palembang Indonesia

Biomass gasification converts into syngas through the gasification process is promising for renewable energy utilization. Although gasification is a sustainable and environmentally-friendly technology for value-added utilization of biomass, yield percentage is the major problem during biomass gasification. An optimized gasifier and highly active catalyst were proved to be effective for biomass production. Furthermore, the decomposition pathway was also important to advance the gasification reactors and catalyst design. This paper summarized the fundamentals, such as gasifier types, zeolite catalysts, and reaction and deactivation mechanisms. This review also sheds light on other excellent catalysts, effective gasifier, and catalyst reaction mechanisms are also discussed in detail. At last, the paper ends with a conclusion and a prospective discussion of the lab-scale research. At the contact time of 240 minutes, with a column height of 30 cm, at a temperature of 450 oC, the concentration of syngas promise well. © Published under licence by IOP Publishing Ltd.

关键词： Gasification

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Synthesis and Characterization of Graphitic Carbon Nanostructures from Cellulose Extraction of Durian Peel Waste 2

Synthesis and Characterization of Graphitic Carbon Nanostruc...

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2nd International Conference on Physics and Applied Physics, ICP and AP 2023

作者： Marlina, H.A. Noer, Z. Purwasasmita, B.S. Department of Physics Faculty of Mathematics and Natural Sciences Jl. Bioteknologi No. 1 Universitas Sumatera Utara Medan20155 Indonesia Engineering Physics Study Program Faculty of Industrial Technology Jl. Ganesha 10 Institut Teknologi Bandung Bandung40132 Indonesia

The synthesis of graphitic carbon nanostructures from cellulose extraction of durian peel waste has been successfully carried out in this study. This study aim to produce the graphitic carbon nanostructures to give innovative solutions to the renewable energy storage challenge. Durian peel cellulose was synthesized into graphitic carbon nanostructures through catalytic graphitization method. 4.8 grams of durian peel cellulose was hydrocharred at 200°C for 4 hours, then impregnated using Fe(NO3).9H2O and ethanol for 90 minutes. The sample was then precipitated for 12 hours and dried at 60°C. The sample was pyrolysed at 900°C for 3 hours. Characterization was carried out using TEM and XRD. Characterization TEM showed the morphological characteristics of graphitic carbon nanostructures in the form of coils in uneven amounts with the avarage diameter size is 24.9134 nm. In addition, the XRD characterization results also strengthen the characteristic phase of graphitic carbon nanostructures at 2θ 26.5° and 44.7°, although nanoparticles from Fe catalysis are visible in the sample due to the absence of reflux. © Published under licence by IOP Publishing Ltd.

关键词： Sodium

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Unveiling Factors Affecting Intentions to Use ChatGPT: Perspectives from Indonesian Higher Education Students

Unveiling Factors Affecting Intentions to Use ChatGPT: Persp...

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International Conference on Informatics and Computing (ICIC)

作者： Zaenal Abidin Kongkiti Phusavat Riza Arifudin Endang Sugiharti Study Program of Informatics Engineering Universitas Negeri Semarang Semarang Indonesia Industrial Enginering Faculty of Engineering Kasetsart University Bangkok Thailand

ISBN: (数字)9798331517601

ISBN: (纸本)9798331517618

ChatGPT has generated significant interest and discussion within the academic community since its initial introduction. This study aims to investigate the students’ intentions to use ChatGPT for educational purposes in higher education. A proposed conceptual model based on the unified theory of acceptance and use of technology model-2 (UTAUT2) was employed in this current study. A total of 575 data obtained from a questionnaire survey of higher education students were analyzed using partial least square-structural equation modeling (PLS-SEM). The results of the hypothesis testing revealed that both cognitive attitude and emotional attitude have a significant influence on the intention to use ChatGPT. The cognitive attitude was influenced by performance expectancy and effort expectancy. Affective attitudes were shaped by factors such as novelty value, performance expectancy, hedonic motivation, and effort expectancy.

关键词： Surveys Analytical models Education Position measurement Chatbots Mathematical models Data models Informatics Testing

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Development of STEM project-based learning student worksheet for Physics learning on renewable energy topic 12

Development of STEM project-based learning student worksheet...

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12th International Physics Seminar, IPS 2023

作者： Muliyati, D. Prastiawan, F. Mutoharoh, M. Department of Physics Education Faculty of Mathematics and Natural Sciences Universitas Negeri Jakarta East Jakarta13220 Indonesia Industry Engineering Study Program Universitas Krisnadwipayana Jatiwaringin Bekasi13077 Indonesia

This research is motivated by the development of education in the 21st-century, which demands students to master the 4C skills (creative thinking, critical thinking, collaboration, and communication), particularly in the field of physics. The nature of physics learning requires active and interactive teaching methods that can be implemented through project-based activities for students. One effective instructional media is the student worksheet designed based on STEM-PjBL (science, technology, engineering, and mathematics project-based learning) principles. This research aims to assess the suitability of STEM-PjBL student worksheets as a learning media, which can serve as a recommendation to assist teachers in teaching renewable energy topics. This study uses the ADDIE model to adopt the Research and Development (R&D) method. This research results in a STEM-PjBL student worksheet as a physics learning media to understand renewable energy topics. The STEM-PjBL student worksheet is expected to assist students in mastering 21st-century skills effectively. © Published under licence by IOP Publishing Ltd.

关键词： Students

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Seagrass Meadows under the Changing Climate:A Review of the Impacts of Climate Stressors

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Research in Ecology 2022年第1期4卷 27-36页

作者： Kuok Ho Daniel Tang Tony Hadibarata Environmental Science Program Division of Science and TechnologyBeijing Normal University-Hong Kong Baptist University United International CollegeZhuhaiGuangdong519087China Environmental Engineering Program Faculty of Engineering and ScienceCurtin University MalaysiaCDT 250MiriSarawak98009Malaysia

Seagrass meadows provide important ecological functions,particularly by serving as carbon sinks and breeding grounds for marine *** change has threatened seagrass communities,causing their replacement,loss and increased *** review examined scholarly articles published between 2010-2021 to comprehensively present the impacts of climate change on seagrass *** shows that ocean warming negatively affects seagrass communities by favouring communities of lower structuring capacities,thus reducing the effectiveness of their ecological *** warming also promotes the propagation and spread of invasive species,and changes the trophic structures leading to further loss of seagrasses of *** seawater temperature is associated with shoot mortality and retarded growth of certain *** level rise causes more wave energy to be received by coastal seagrass communities,thus,creating more damage to the *** sea limits light penetration and alters distribution of seagrass *** dioxide enrichment of seawater increases photosynthetic rate of seagrasses but ocean warming and acidification counteract this beneficial *** dioxide enrichment affects different seagrass species and different parts of a seagrass species differently,and,where beneficial to seagrass communities,could enhance their ecological *** extremes could kill seagrasses while marine heatwaves and flooding could act synergistically to increase carbon demand of certain seagrasses and unfavourably change their *** impacts are often aggravated by anthropogenic *** review calls for more studies and conservation efforts to understand the impacts of climate change on seagrass communities and future-proof them against the changing climate.

关键词： Climate change Extreme weather Seagrass Ocean warming Ocean acidification Vulnerability

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