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Thermodegradation characterization of microplastics: Dispersion effect and pyrolysis kinetics by artificial intelligence

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Chemical engineering Journal 2023年 457卷

作者： Chen, Wei-Hsin Sun, Shih-Che Ocreto, Jherwin B. Nguyen, Thanh-Binh Lam, Su Shiung Park, Young-Kwon Dong, Cheng-Di Department of Aeronautics and Astronautics National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung407 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung411 Taiwan International Master Degree Program on Energy National Cheng Kung University Tainan701 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung City81157 Taiwan Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia Johor Johor Bahru81310 Malaysia University Centre for Research and Development Department of Chemistry Chandigarh University Gharuan Punjab Mohali India School of Environmental Engineering University of Seoul Seoul02504 Korea Republic of

The research of pyrolytic thermodegradation of plastic wastes has received much attention. However, detailed combustion behavior and pyrolysis kinetics of microplastics are still absent in the current research. Understanding the characteristics and kinetics of microplastic pyrolysis is vital for designing and optimizing operational conditions. Adding silica to high-density polyethylene (HDPE) microplastics can effectively avoid the agglomeration of microplastics during pyrolysis, thereby better elucidating their thermodegradation. In the experiment, HDPE microplastics are mixed with SiO2 at different weight ratios (10 %, 20 %, 50 %, 70 %, and 100 %) to observe the dispersion effect on the microplastic thermodegradation. The results suggest that less than 20 % of PE in the mixture can retain microplastic pyrolysis characteristics. In combustion analysis, 10 % PE undergoes a faster thermo-oxidation reaction than pure HDPE. This study applies the independent parallel reaction (IPR) model and particle swarm optimization (PSO) algorithm to investigate microplastic pyrolysis kinetics. The pyrolysis activation energy is between 273.89 and 292.90 kJ‧mol−1, with fit quality high than 95 %, and rises with decreasing dispersion degree and increasing heating rate. This indicates that microplastic thermodegradation has low activation energy and is affected by heat transfer rate. The Py-GC/MS analysis indicates that up to 83.6 % of alkene and 52.3 % of products comprise high carbon numbers (17-Pentatriacontene and 1-Octatriacontene), respectively, suggesting the suppression of the secondary reaction of microplastics in the pyrolysis reaction. The calculated kinetic parameters are beneficial for understanding microplastic thermodegradation characteristics and can provide useful information for reactor design in industrial pyrolyzers or gasifiers. © 2023 Elsevier B.V.

关键词： Thermogravimetric analysis

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Monitoring of water quality and plankton composition in Porong Estuary, Sidoarjo

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AIP Conference Proceedings 2025年第1期3186卷

作者： Uun Yanuhar Muhammad Musa Heru Suryanto Nur Sakinah Junirahma Nico Rahman Caesar Aquatic Resources Management Faculty of Fisheries and Marine Sciences Brawijaya University Malang Jl. Veteran Malang 65145 Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Negeri Malang Malang 65145 Indonesia Master Program of Aquaculture Faculty of Fisheries and Marine Science University of Brawijaya Jl. Veteran Malang 65145 Indonesia Doctoral program of Environmental Science Postgraduate Program University of Brawijaya Jl. Veteran Malang 65145 Indonesia

Disposal of Lapindo mud which carries nutrients and other dissolved organic matter into the Porong estuary, can cause the death of aquatic organisms due to high contamination and disturbance of aquatic ecosystems. The presence of phytoplankton can explain the current condition of the Porong Estuary. The purpose of this study was to report the water quality and plankton composition of the Porong estuary. The method used in this study is a descriptive survey method. Determination of sampling points using the appropriate sampling method at three stations. The research variables observed included water quality parameters such as temperature, total dissolved solids (TDS), total suspended solids (TSS), total organic matter (TOM), pH, dissolved oxygen (DO), carbon dioxide (CO2), biological oxygen demand (BOD), nitrate, ammonia, orthophosphate, salinity and observations of phytoplankton in water bodies. The water quality values at stations 1, 2, and 3 respectively for TSS, pH, DO, BOD, TOM, nitrate, ammonia, orthophosphate shows a less than optimal value. Water conditions based on plankton abundance 24,678 cells/mL, 44,904 cells/mL, 18,312 cells/mL were eutrophic. The average of water quality parameters classified as less than optimal. Relatively, station 1 is the station with the best conditions between stations 2 and 3.

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Pedestrian ways arrangement to support the green campus idea: Lesson from UNDIP Tembalang campus 5

Pedestrian ways arrangement to support the green campus idea...

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5th International Conference on Energy, environmental and Information System, ICENIS 2020

作者： Adi Prasetya, Nararya Purwanto, P. Maryono, Maryono Master Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia Department of Urban and Regional Planning Faculty Engineering Diponegoro University Semarang Indonesia Centre for Green Infrastructure Resilience and Development School of Postgraduate Diponegoro University Indonesia

Providing more space for non-motorized transportation will change the orientation of how people use the road. The first step of changing the orientation of city development which is car-oriented to people-oriented is how to look at the overall existing road users. Accessibility is the basic part of how an area develops, including on a university development. UI Greenmetric as a parameter of university achieving how it can be called a green campus. Not only designing a good campus, but the 'sustainable' policy also cannot be separated from creating a comfortable environment. The current condition of Diponegoro University's open green space reaches less than 60%, while Undip Tembalang already has a pedestrian lane, but is not utilized properly. The research method uses descriptive analysis of the literature articles on how important the pedestrian path that has been done at other universities. The results show that improving and changing the road design effect. Relating to the comfort of people walk affects how the pedestrian path had used. The official regulations from the university also have an impact on reducing the use of motorized vehicles. Improving accessibility for students to use public transportation and non-motorized transportation could reduce emissions in the campus's environment. © The Authors, published by EDP sciences, 2020.

关键词： Urban growth

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Response to Comment on "Cannabis and the Environment: What science Tells Us and What We Still Need to Know"

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environmental science & TECHNOLOGY LETTERS 2021年第6期8卷 486-486页

作者： Wartenberg, Ariani C. Holden, Patricia A. Bodwitch, Hekia Parker-Shames, Phoebe Novotny, Thomas Harmon, Thomas C. Hart, Stephen C. Beutel, Marc Gilmore, Michelle Hoh, Eunha Butsic, Van Department of Environmental Science Policy and Management University of California Berkeley California 94720 United States Bren School of Environmental Science & Management University of California Santa Barbara California 93117 United States School of Public Health San Diego State University San Diego California 92182 United States Environmental Systems Graduate Program School of Engineering University of California Merced California 95343 United States Department of Life & Environmental Sciences and Sierra Nevada Research Institute University of California Merced California 95343 United States

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Water quality indices for rainwater quality assessment in Bandung urban region 2

Water quality indices for rainwater quality assessment in Ba...

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2nd International Conference on Green Civil and environmental engineering, GCEE 2019

作者： Hasan, N.Y. Driejana Sulaeman, A. Ariesyady, H.D. Doctoral Program of Environmental Engineering Faculty of Civil and Environmental Engineering Bandung Institute of Technology Indonesia Faculty of Civil and Environmental Engineering Bandung Institute of Technology Indonesia Faculty of Mathematics and Natural Science Bandung Institute of Technology Indonesia

Water quality indices (WQI) using STORET method has been used to assess rainwater quality in the Bandung urban regions, based on monitoring data at three locations (Coblong, Sumur Bandung, and Buah Batu). Rainwater samples were analyzed by detecting pH, SO42-, NO3-, Cl-, and heavy metals (As, Cd, Cr, Pb, and Zn) compared with Indonesian Government Regulation No. 82 Year 2001. Rainwater quality showed polluted based on the parameters of the water quality indices analysis using the Class I and Class II criteria. Rainwater quality in Bandung urban region were lightly polluted (Coblong) and moderately polluted (Sumur Bandung and Buah Batu). Rainwater can potentially become a water sources alternative for domestic use and urban farming in Bandung urban region, but it requires further treatment for better quality. © Published under licence by IOP Publishing Ltd.

关键词： Heavy metals

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Development of Artificial Intelligence-Based Model for Prediction of the Compressive Strength of Self-Compacting Concrete

SSRN

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SSRN 2021年

作者： Ly, Hai-Bang Pham, Binh Thai Nguyen, Thuy-Anh Nguyen, May Huu Civil Engineering Department University of Transport Technology 54 Trieu Khuc Thanh Xuan Hanoi100000 Viet Nam Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima University 1-4-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8527 Japan

This study investigated the usability of an artificial neural network model (ANN) and the Grey Wolf Optimizer (GWO) method for predicting the compressive strength of self-compacting concrete (SCC). The ANN-GWO model was developed using an experimental database of 115 samples obtained from various sources considering nine key factors of SCC. The validation of the proposed model was evaluated via six indices including correlation coefficient, mean squared error, mean absolute error, IA, Slope, and mean absolute percentage error. In addition, the importance of each parameter affecting the compressive strength of SCC was investigated utilizing partial dependence plots. The findings demonstrated that the proposed ANN-GWO model is a reliable predictor of SCC compressive strength. Following that, an examination of the parameters impacting the compressive strength of SCC was provided. © 2021, The Authors. All rights reserved.

关键词： Compressive strength

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Pioneering bone regeneration: A review of cutting-edge scaffolds in tissue engineering

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Bioprinting 2024年 43卷

作者： Alex, Y. Vincent, Sumi Divakaran, Nidhin Uthappa, U.T. Srinivasan, Parthasarathy Mubarak, Suhail Al-Harthi, Mamdouh Ahmed Dhamodharan, Duraisami School for Advanced Research in Petrochemicals: Laboratory for Advanced Research in Polymeric Materials (LARPM) Central Institute of Petrochemicals Engineering and Technology (CIPET) Bhubaneswar 751024 India Mechanical Engineering Program Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Mechanics of Composites for Energy and Mobility Laboratory King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518055 China Department of Electronics and Communication Engineering Amrita School of Engineering Amrita Vishwa Vidyapeetham Tamil Nadu Chennai 601103 India Research Institute of Humanities and Social Sciences University of Sharjah Sharjah 27272 United Arab Emirates Interdisciplinary Research Center for Refining and Advanced Chemicals King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia Department of Chemical Engineering King Fahd University of Petroleum & Minerals Dhahran Saudi Arabia

Bone tissue engineering (BTE) is aims to develop advanced strategies to regenerate damaged or diseased bone, through the integration of principles from cellular biology, biomaterials science, and engineering. The vital aspect of these studies includes the design and fabrication of scaffolds that support cell adhesion, proliferation, and differentiation, ultimately promoting the formation of new bone tissue. Recent developments in scaffold materials have focused on organic, inorganic, and composite biomaterials. Each of these showcasing unique and distinct advantages in terms of biocompatibility, biodegradability, and mechanical strength. Polymers, such as poly (lactic-co-glycolic acid) (PLGA), provide flexibility and degradation profiles, which are conducive to tissue integration. While ceramics, including hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP), offer mechanical properties similar to native bone. The fusion of organic and inorganic components in composites has yielded scaffolds with enhanced functionality, such as improved osteo-conductivity and controlled degradation rates. Advanced fabrication techniques, particularly electrospinning and 3D printing, have revolutionized scaffold design by enabling precise control over pore size, porosity, and surface architecture, critical parameters for mimicking the extracellular matrix (ECM) of bone. These structural characteristics directly influence cellular behaviors such as migration, proliferation, and differentiation, which are crucial for successful bone regeneration. This review critically evaluates the recent advances in biomaterials for scaffold fabrication, with a focus on optimizing the interplay between material properties and scaffold architecture to improve therapeutic outcomes in bone regeneration. The findings underscore the importance of material selection and scaffold design in BTE and provide actionable insights for both researchers and clinicians in the development of next-generation scaffol

关键词： Biomaterials Bone scaffold design Ideal scaffold Polymer Scaffold Tissue engineering

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Visible light-driven selective redirection of phenolic carbon in heterogeneous Fenton-like reaction

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Water Research 2025年

作者： Youn-Jun Lee Prakash Govindaraj Yoo Jae Jeong Runfa Tan In Sun Cho Seong-Jik Park Hern Kim Chang-Gu Lee Pedro J.J. Alvarez Department of Energy Systems Research Ajou University Suwon 16499 Republic of Korea Department of Energy Science and Technology Environmental Waste Recycle Institute Myongji University Yongin Gyeonggi-do 17058 Republic of Korea Materials Science and Engineering Program University of Colorado Boulder Boulder 80303 USA Department of Materials Science & Engineering Ajou University Suwon 16499 Republic of Korea Department of Bioresources & Rural System Engineering Hankyong National University Anseong South Korea Department of Environmental and Safety Engineering Ajou University Suwon 16499 Republic of Korea Department of Civil and Environmental Engineering and Rice WaTER Institute Rice University Houston TX 77005 USA

Oxidative polymerization of phenolic pollutants by the heterogeneous Fenton-like reaction is a sustainable strategy for wastewater decontamination and recovery of carbonaceous resources. However, controlling the reaction pathway to selectively polymerize the phenolic pollutants is challenging. Herein, we used visible light to shift the reaction pathway from phenolic pollutants degradation (which often results in incomplete mineralization) to polymerization over a g–C₃N₄ catalyst deposited on a Cu₂O nanowire. In peroxymonosulfate (PMS) activation, visible light illumination facilitates electron transfer from Cu₂O to g–C₃N₄, shifting the dominant reactive species on the Cu₂O surface from radical species to catalyst–PMS* complex. Experimental results and theoretical calculations verified the increased adsorption of PMS and the reduced energy barrier for phenol (PhOH) polymerization under visible light illumination. Compared to dark control conditions, visible light-assisted Fenton-like process resulted in a 9-fold faster PhOH oxidation (0.029 min⁻¹), significantly higher PMS utilization efficiency for total organic carbon removal, and enhanced robustness in real water matrices. This study provides fundamental insights into the regulation of reaction pathway over light-responsive semiconductor catalysts and highlights the potential for efficient treatment of phenolic water pollutants via oxidative polymerization.

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Dynamic WNT signaling controls differentiation of hematopoietic progenitor cells from human pluripotent stem cells

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science China Life sciences 2025年

作者： Mo Li Keiichiro Suzuki Mengge Wang Christopher Benner Manching Ku Li Ma Ladan Kobari Na Young Kim Nuria Montserrat Chan-Jung Chang Guanghui Liu Jing Qu Jinna Xu Yingzi Zhang Emi Aizawa Jun Wu Luc Douay Concepcion Rodriguez Esteban Juan Carlos Izpisua Belmonte Key Laboratory of Organ Regeneration and Reconstruction State Key Laboratory of Membrane Biology Institute of Zoology Chinese Academy of Sciences Institute for Stem Cell and Regeneration Chinese Academy of Sciences EFS Ile de France Unité d’Ingénierie et de Thérapie Cellulaire AP-HP H?pital Saint Antoine/Armand Trousseau Service d’Hématologie et immunologie biologique Altos Labs Bioscience Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) KAUST Center of Excellence for Smart Health (KCSH) Gene Expression Laboratory Salk Institute for Biological Studies Institute for Advanced Co-Creation Studies Osaka University Integrative Genomics and Bioinformatics Core Salk Institute for Biological Studies Next Generation Sequencing Core Salk Institute for Biological Studies UPMC Univ Paris 06 UMRS938 CDR Saint-Antoine Prolifération et Différentiation des Cellules Souches INSERM UMRS938 Prolifération et Différentiation des Cellules Souches Center for Regenerative Medicine in Barcelona

Human pluripotent stem cells (hPSCs) can in theory give rise to any hematopoietic lineages,thereby offering opportunities for disease modeling,drug screening and cell ***,gaps in our knowledge of the signaling requirements for the specification of human hematopoietic stem/progenitor cells (HSPCs),which lie at the apex of all hematopoietic lineages,greatly limit the potential of hPSC in hematological research and *** analysis reveals aberrant regulation of WNT signaling during maturation of h PSC-derived hematopoietic progenitor cells (hPSC-HPCs),which results in higher mitochondria activity,misregulation of HOX genes,loss of selfrenewal and precocious *** defects are partly due to the activation of the WNT target gene ***-stage WNT inhibition improves the yield,self-renewal,multilineage differentiation,and transcriptional and metabolic profiles of *** mapping of transcription factor (TF) accessible chromatin reveals a significant overrepresentation of myeloid TF binding motifs in hPSC-HPCs,which could underlie their myeloid-biased lineage *** our findings uncover a previously unappreciated dynamic requirement of the WNT signaling pathway during the specification of human *** the WNT pathway with small molecules normalizes the molecular differences between hPSC-HPCs and endogenous hematopoietic stem cells (HSCs),thereby representing a promising approach to improve the differentiation and function of hPSC-HPCs.

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Investigation of ecological risk of microplastics in peatland areas: A case study in Vietnam

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environmental Research 2023年 220卷 115190页

作者： Nguyen, Minh Ky Lin, Chitsan Quang Hung, Nguyen Tri Hoang, Hong-Giang Vo, Dai-Viet N. Tran, Huu-Tuan Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Faculty of Environment and Natural Resources Nong Lam University of Ho Chi Minh City Hamlet 6 Linh Trung Ward Thu Duc Dist. Ho Chi Minh City700000 Viet Nam Faculty of Medicine Dong Nai Technology University Bien Hoa Dong Nai 76100 Viet Nam Nguyen Tat Thanh University Ho Chi Minh City700000 Viet Nam Laboratory of Ecology and Environmental Management Science and Technology Advanced Institute Van Lang University Ho Chi Minh City700000 Viet Nam Faculty of Applied Technology School of Engineering and Technology Van Lang University Ho Chi Minh City700000 Viet Nam

This study aims to investigate the distribution and ecological risk assessment of microplastics (MPs) in peatland areas located in Long An province, Vietnam's Mekong Delta. In general, polyvinyl chloride (60.7%), polyethylene (25.8%), and polypropylene (11.9%) were the most abundant polymers determined in the thirty sediment samples. The hazard index (HI) remarked a level of III for MPs contamination in Tan Thanh and Thanh Hoa districts. The pollution load index (PLI) and potential ecological risk index (RI) indicated that the contamination risk of MPs polymer types in the studied sites is relatively high. According to PLI values, MPs levels of peatlands in Tan Thanh and Thanh Hoa are high and moderate, respectively, while the peatland sediments in Duc Hue district are less contaminated. Furthermore, ecological risk indexes in the peatland areas were relatively high, with PLIoverall (level III);HIoverall (level V), and RIoverall (extreme danger). Hence, this study proposed a SWOT framework for challenges of MPs pollution in order to manage peatlands appropriately and minimize ecological risks. As a result, several practical strategies and appropriate approaches have been recommended to reduce microplastics towards a circular economy. These findings provide the initial quantitative assessment insights into hazard levels and ecological impacts of MPs in Vietnam's Mekong Delta peatlands. © 2022 Elsevier Inc.

关键词： Risk assessment

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