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Impacts of vegetation over bedforms on flow characteristics in gravel-bed rivers

Journal of Hydrodynamics 2019年第5期31卷 986-998页

作者： Hossein Afzalimehr Mohammad Reza Maddahi Jueyi Sui Majid Rahimpour Department of Civil Engineering Iran University of Science and TechnologyTehranIran Department of Water Engineering Shahid Bahonar University of KermanKermanIran Environmental Engineering Program University of Northern British ColumbiaCanada

In the present study,among six gravel-bed river reaches,two natural gravel-bed river reaches with approximately similar bedforms and flow conditions have been found,one river reach with vegetation on bedforms and the other without vegetation on *** on field measurements,the impacts of vegetation over bedforms on flow characteristics have been *** velocity,Reynolds stress and turbulence intensity distributions over bedforms with vegetation have been compared with those over gravel bedforms without *** using the quadrant analysis,the dominant events of turbulent flow structures have been assessed for flows over gravel bedforms with vegetation and without *** show that the effect of vegetation enhances the anisotropy in turbulence and generates strong secondary currents,which lead to the occurrence of dip phenomenon at the stoss section and the crest of vegetated *** change of bed roughness from gravel bed to vegetated bed causes a development of a new boundary *** resulted in the different shape of velocity distributions over bedforms with vegetation from those over bedforms without vegetation,which can affect the lives of aquatic *** shear stress at downstream section of gravel bedform without vegetation is much higher than that of vegetated bedform,which shows that the erosion takes place from downstream of vegetated bedforms,while in the bare beds;the deposition is at downstream of *** is found that the presence of vegetation causes a chaotic distribution pattern of Reynolds shear stress,while it has more orderly pattern at the downstream section of gravel bedform without ***,the distribution of turbulence intensity in the lee side of vegetated bedform has a concave shape and in the stoss section,turbulence is generated in ejections and sweeps near the vegetation *** findings are significant to the practice of river ecological restoration.

关键词： Bedform Reynolds shear stress distribution turbulence intensity vegetation velocity profiles

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Title Biodecolorization of Biogas Power Plant Effluent Derived from Anaerobically Digested Distillery Wastewater by Natural Selected Pseudomonas Putida from Activated Sludge of the Wastewater Treatment Plant

SSRN

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SSRN 2023年

作者： Kumkaew, Ponruedee Suaisom, Pitchaya Mukkata, Kanokwan Koonaphapdeelert, Sirichai Sawatdeenarunat, Chayanon Nitayavardhana, Saoharit Master’s Degree Program in Environmental Engineering Faculty of Engineering Chiang Mai University Chiang Mai50200 Thailand Graduate School Chiang Mai University Chiang Mai50200 Thailand Energy Research and Development Institute – Nakornping Chiang Mai University Chiang Mai50200 Thailand Department of Environmental Engineering Faculty of Engineering Chiang Mai University Chiang Mai50200 Thailand Asian Development College for Community Economy and Technology Chiang Mai Rajabhat University Chiang Mai50300 Thailand Center of Excellence in Materials Science and Technology Chiang Mai University Chiang Mai50200 Thailand

The main aim of this study was to utilize naturally selected Pseudomonas putida strains isolated from activated sludge in a wastewater treatment plant, for the purpose of bioremediation of biogas effluent to remove organic content and color. Biogas effluent from anaerobically digestion of distillery wastewater treated with P. putida at the best evaluated condition (sample concentration of 50% v/v, agitation and aeration rates of 250 rpm and 1.0 vvm for 6 days) showed significant decolorization and organic removal efficacies of 34.29 ± 0.87% and 38.94 ± 0.63%, respectively. Bioremediation efficiency was dependent on bacterial growth which organic content in sample and dissolved oxygen during cultivation were key factors. The natural selected bacterium could tolerate higher organic content and work synergistically with other indigenous microorganisms found in the biogas effluent. Consequently, bioremediation of biogas effluent by natural selected P. putida is feasible to apply in biogas power plant where sterilization is not necessary in the process. © 2023, The Authors. All rights reserved.

关键词： Bioremediation

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Accelerating adoption of species-agnostic plant sensors for precision farming

Nature Reviews Electrical Engineering

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Nature Reviews Electrical engineering 2025年 58-70页

作者： Abdullah Bukhamsin Khaled Nabil Salama Jürgen Kosel Ikram Blilou Bioengineering Program Biological and Environmental Science and Engineering (BESE) Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Center of Excellence — Sustainable Food Security (SFS) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Electrical and Computer Engineering Program Computer Electrical and Mathematical Sciences and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Sensor Systems Division Silicon Austria Labs Villach Austria Plant Science Program Biological and Environmental Science and Engineering (BESE) Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia

Precision farming is an optimized management farming scheme that seeks to link the real-time needs of crops with the nutrients to be administered. Sensing platforms that can monitor the physiological status of crops in situ are key to enabling timely and localized interventions. However, the underdevelopment of plant sensing strategies limits the potential of precision farming. In this Review, we discuss the challenges and advancements in phyto-monitoring, focusing on strategies that are applicable to a wide range of plant species and suitable for field deployment. We explore species-agnostic sensors, including optical and electrochemical sensors, whose operation is based on principles that are widely applicable to all plant species. These platforms enable real-time monitoring of the physiological state of crops by assessing key biomarkers, such as plant hormones, and metabolites such as salicylic acid and reactive oxygen species. Evaluating these systems, we conclude that an integrative sensing approach is necessary to compensate for the limitations of the individual methods and can provide a holistic view of crop health. Cost-effective species-agnostic sensors are thus needed to provide information that can be used to minimize the resource footprint of farming and meet the growing global demand.

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Monitoring blood pressure through a single hybrid hemodynamic signal with a flexible optoelectronic patch

Device

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Device 2025年

作者： Zhong, Yizhou Zhang, Yongcao Pu, Jing Wustoni, Shofarul Uribe, Johana Lopez-Larrea, Naroa Marks, Adam McCulloch, Iain Mecerreyes, David Baran, Derya Inal, Sahika Organic Bioelectronics Laboratory Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Materials Science and Engineering Program (MSE) Physical Sciences and Engineering Division (PSE) KAUST Thuwal 23955-6900 Saudi Arabia POLYMAT University of the Basque Country UPV/EHU Avenida Tolosa 72 Guipuzcoa Donostia-San Sebastian 20018 Spain Department of Chemistry University of Oxford Oxford OX1 3TF United Kingdom Andlinger Center for Energy and the Environment and Department of Electrical and Computer Engineering Princeton University Princeton 08544 NJ United States IKERBASQUE Basque Foundation for Science Plaza Euskadi 5 Bilbao 48009 Spain

Hemodynamics, the study of blood flow and circulatory forces, is fundamental for assessing cardiovascular health, disease states, and therapeutic outcomes. Here, we introduce a skin-conformable organic optoelectronic thin-film patch (ePatch) designed to simultaneously capture electrocardiography (ECG) and photoplethysmography (PPG) signals as a single hybrid signal, named the electrocardio-photoplethysmogram (EC-PPG). The ePatch integrates an organic electrochemical transistor (OECT), an organic photodiode, surface-mounted light-emitting diodes, and electrochemical electrodes on a flexible, skin-conforming substrate. By training deep learning models on the hybrid EC-PPG data, we achieved accurate arterial blood pressure estimations, with mean errors of just 1.69 mmHg for systolic and 0.89 mmHg for diastolic blood pressure, outperforming traditional predictions that rely on individual physiological signals as inputs. Our findings underscore the potential of EC-PPG as a compound hemodynamic signal for AI-driven vital sign monitoring and integrated, solution-processable soft electronics for clinical and point-of-care applications. © 2025 The Authors

关键词： DTI-3: Develop electrocardiography electrophysiology flexible electronics OECT OPD organic electrochemical transistor photoplethysmography wearable electronics

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Association between ambient air particulate matter and human health impacts in northern Thailand (vol 13, 12753, 2023)

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SCIENTIFIC REPORTS 2023年第1期13卷 1-15页

作者： Supasri, Titaporn Gheewala, Shabbir H. Macatangay, Ronald Chakpor, Anurak Sedpho, Surat Atmospheric Research Unit National Astronomical Research Institute of Thailand Chiang Mai Thailand Energy Engineering Program Faculty of Engineering Chiang Mai University Chiang Mai Thailand Institute of Environmental Science and Meteorology University of the Philippines Diliman Quezon City Philippines The Joint Graduate School of Energy and Environment (JGSEE) King Mongkut’s University of Technology Thonburi Bangkok Thailand Center of Excellence on Energy Technology and Environment Ministry of Higher Education Science Research and Innovation Bangkok Thailand School of Energy and Environment University of Phayao Phayao Thailand

Air pollution in Thailand is regarded as a serious health threat, especially in the northern region. High levels of particulate matter (PM2.5and PM10) are strongly linked to severe health consequences and mortality. This study analyzed the relationship between exposure to ambient concentrations of PM2.5and PM10by using data from the Pollution Control Department of Thailand and the burden of disease due to an increase in the ambient particulate matter concentrations in northern Thailand. This study was conducted using the Life Cycle Assessment methodology considering the human health damage impact category in the ReCiPe 2016 method. The results revealed that the annual average years of life lived with disability from ambient PM2.5in northern Thailand is about 41,372 years, while from PM10it is about 59,064 years per 100,000 population. The number of deaths from lung cancer and cardiopulmonary diseases caused by PM2.5were approximately 0.04% and 0.06% of the population of northern Thailand, respectively. Deaths due to lung cancer and cardiopulmonary diseases caused by PM10, on the other hand, were approximately 0.06% and 0.08%, respectively. The findings expressed the actual severity of the impact of air pollution on human health. It can provide valuable insights for organizations in setting strategies to address air pollution. Organizations can build well-informed strategies and turn them into legal plans by exploiting the study’s findings. This ensures that their efforts to tackle air pollution are successful, in accordance with regulations, and contribute to a healthier, more sustainable future guidelines on appropriate practices of air pollution act/policy linkage with climate change mitigation.

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Qualitative Risk Analysis for Contents of Dry Toilets Used to Produce Novel Recycling Fertilizers

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Circular Economy and Sustainability 2021年第3期1卷 1107-1146页

作者： Krause, Ariane Häfner, Franziska Augustin, Florian Udert, Kai M. Leibniz Institute of Vegetable and Ornamental Crops (IGZ) e.V. program area ‘Next-Generation Horticultural Systems’ (HORTSYS) Großbeeren Germany Finizio – Future Sanitation Eberswalde Germany ETH Zürich Institute of Environmental Engineering Zürich Switzerland Eawag Swiss Federal Institute of Aquatic Science and Technology Dübendorf Switzerland

Human excreta are a sustainable, economical source of nutrients, and can be used to produce recycling fertilizer for horticulture by collecting and processing the contents of dry toilets. Herein, we discuss the key categories of risk associated with the main groups of materials commonly found in dry toilets. The study was part of the development of a German product standard for marketable and quality-assured recycling fertilizers from human excreta for use in horticulture. Particular attention is paid to ensuring that the fertilizer is epidemiologically and environmentally harmless and that the quality of the recycling fertilizer is adequate in terms of low pollution and nutrient availability. In sum, the risk of transmissible human pathogens lies within the human excreta, particularly feces;plant materials added during composting are of particular phytosanitary relevance;pharmaceutical residues in excrements and chemical additives are potential sources of pollutants;non-biodegradable contaminants can cause pollution and injury;and the horticultural risks involve mainly the ammonia emission potential and in some cases the salinity effects of urine. These risks can be reduced significantly (i) with education of users around proper operation of dry toilets and the consequences of adding inappropriate waste, (ii) with facilitation of proper use with general waste bins and clear instructions, and importantly (iii) by using modern sanitization and cleaning processes and testing for harmful substances under the guidance of local laws and regulations, ensuring safe and high-quality fertilizers. In conclusion, the benefits of using dry toilet contents to produce fertilizers for use in horticulture are unquestionable. Our analysis highlights the need to support recycling optimization and awareness for the purpose of a sustainable circular economy and to minimize the risk of harm to humans and the environment overall. © 2021, The Author(s).

关键词： Compost Human excreta Nutrient cycling Pharmaceuticals Pollutants Sanitation Urine

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Characteristics of Aerogels Manufacturing Using Wastepaper

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2019年第1期51卷 100-106页

作者： Hwang, Lm Jeong Lee, Young Kyu Won, Jong Myoung Program of Paper Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

In order to evaluate the possibility of producing aerogels using waste paper, white ledger and KOCC (Korea old corrugated container) were fibrillated to produce aerogels and their characteristics were compared with those of hardwood bleached kraft pulp. Grinding was performed at 5, 10, 15 and 20 times, and the concentration of fibrillated fiber was adjusted to 0.5, 1.0 and 1.5% in order to investigate the effect of fibrillation degree and the fibrillated fiber concentration. As the grinding progressed, the average fiber length decreased. In the case of white ledger, the increase of low shear viscosity was delayed. In the case of KOCC, little change was observed, which is closely related to the fibrillation characteristics of the fiber. The degree of polymerization of hardwood bleached kraft pulp and white ledger decreased as the number of grinding times increased. However, KOCC showed no significant change. As the grinding number and fibrillated fiber concentration increased, the specific surface area of the aerogels increased, but the average pore size decreased. These properties were closely related to the fibrillation characteristics of the fibers. As the pore size of the aerogels decreased, the absorption of water and oil decreased. The absorption of water by hydrophobic treatment of aerogels was significantly decreased, but the absorption of oil was improved for white ledger and KOCC. © 2019 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Pore size

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Study of Duck Feather Modification using NaOH to Removal Iron in Acid Mine Drainage (AMD 5

Study of Duck Feather Modification using NaOH to Removal Iro...

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

作者： Baroroh Lili Utami, Umi Heru, Susanto Cahyono, Bambang Doctor of Scientific Environmental Science Program Diponegoro University Semarang Indonesia Department of Chemical Faculty of Engineering Diponegoro University Semarang Indonesia Department of Chemistry Faculty of Science and Mathematics Diponegoro University Semarang Indonesia

Study of duck feather modification using NaOH to removal iron in acid mine drainage (AMD) has been done. The objective of this study was to determine adsorption capacity. Modification duck feather that 2 g of duck powder was dissolved in 25 mL NaOH with a concentration of 1.00;1.25;1.50;1.75;2.00;and 2.25 % (v/v), then placed on hotplate stirrer at 50°C and stirred for 24 hours. The results showed that adsorption capacity of Fe by adsorbent of duck feather modification using NaOH optimum at concentration 1.50% and adsorption capacity before and after activation were 36.231 mg/g and 68.493 mg/g and potential to be used as an adsorbent to removal of Fe in acid mine drainage at coal mining. © The Authors, published by EDP sciences, 2020.

关键词： Sodium hydroxide

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Emergence of microplastics in the aquatic ecosystem and their potential effects on health risks: The insights into Vietnam

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Journal of environmental Management 2023年 344卷 118499页

作者： Nguyen, Minh-Ky Lin, Chitsan Nguyen, Hoang-Lam Le, Van-Re KL, Priya Singh, Jagpreet Chang, Soon W. Um, Myoung-Jin Nguyen, D. Duc Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Faculty of Environment and Natural Resources Nong Lam University Ho Chi Minh City700000 Viet Nam Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Civil Engineering McGill University Montreal Canada Ho Chi Minh City700000 Viet Nam Department of Civil Engineering TKM College of Engineering Kollam691005 India Department of Chemistry University Centre for Research & Development Chandigarh University Punjab Mohali140413 India Department of Civil & Energy System Engineering Kyonggi University Suwon Korea Republic of Faculty of Environmental and Food Engineering Nguyen Tat Thanh University 300A Nguyen Tat Thanh District 4 Ho Chi Minh City755414 Viet Nam

The increase of microplastic contamination in Vietnam is a growing concern due to various domestic, agricultural, and industrial activities. The use of plastic mulch and sludge application in agricultural farmland, textile production, daily consumer items, cleaning agents, and health/personal care products contribute significantly to the increasing microplastic pollution in the aquatic ecosystem. The concentration of microplastics reported in surface water ranged from 0.35 to 519,000 items m−3, with fibers and fragments being the most prevalent shapes. Notably, the high concentration of microplastics was observed in lakes, canals, and megacities such as Ha Noi and Ho Chi Minh City, which poses potential health risks to the local community via drinking-water supply and food chains. As an emerging pollutant, MPs are the transport vectors for contaminants in environmental matrices that act as a carrier of hazardous pollutants, release toxic compounds, and evenly aggregate/accumulate in biota. Recent studies have reported the presence of microplastics in various marine organisms, including fish and shellfish, highlighting the risk of ingestion of these particles by humans and wildlife. Thus, it is imperative to monitor microplastic contamination in the ecosystem to provide helpful information for the government and local communities. Efforts should be taken to reduce microplastic pollution at the source to minimize potential effects on ecological and health safety. This review paper emphasizes the urgent need for further research on microplastic pollution in Vietnam and highlights potential solutions to mitigate this emerging environmental threat. Keyworks: single-use plastics;microplastics;ecosystems;plastic waste;health risk;ecological and health safety;pollution mitigation. © 2023 Elsevier Ltd

关键词： Microplastic

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Preparation and characterization of anticorrosive and antibacterial coatable nanocomposite based on zinc phosphate modified by Hydroxy Apatite/alginate: Investigation of electrochemical impedance spectroscopy (EIS)

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Case Studies in Chemical and environmental engineering 2024年 9卷

作者： Mohammadkhani, Arezoo Mohammadkhani, Faezeh Sadjadi, Mirabdullah Seyed Farhadyar, Nazanin Soltanian Fard, Mohammad Jaafar kianfar, Ehsan Zakani, Mehdi Department of Chemistry Faculty of Science Firooz Abad Branch Islamic Azad University Fars Iran Department of Environmental Engineering Faculty of Engineering North Tehran Branch Islamic Azad University Tehran Iran Department of Chemistry Science and Research Branch Islamic Azad University Tehran Iran Department of Chemistry Varamin Pishva Branch Islamic Azad University Varamin Iran Young Researchers and Elite Club Gachsaran Branch Islamic Azad University Gachsaran Iran Iran University of Medical Science Radiology Residency Program Iran

In This study, three new surface-modified antibacterial and anticorrosive nanocomposites (zinc Phosphate- Polyvinyl Pyrrolidone, Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite and Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite/Alginate) were synthesized in low-temperature by facile and efficient method. We crosslink Alg with Zn²⁺ and Ca²⁺ to make it insoluble and enhancing of their physical and biological properties (zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite/Alginate). Nanocrystals were characterized by (XRD), (FT-IR), (EDX), (SEM) and (TEM). the TEM image showed that the core shell nanocrystal had good dispersion with a particle size of 8–36, 12–38 and 10–45 nm, respectively. Antibacterial rate of the Zinc Phosphate- Polyvinyl Pyrrolidone, Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite and Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite/Alginate NPs reached near 100%. To analyze the EIS results obtained from the equivalent circuits, parameters such as R_ct, CPE_dl, R_f, n, CPE_f, and R_t were extracted. Nyquist diagrams demonstrated that the Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite sample had better protection than the Zinc Phosphate- Polyvinyl Pyrrolidone and Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite/Alginate sample, at all immersion time. The phase angle of the Zinc Phosphate- Polyvinyl Pyrrolidone (-θ 11°/96 h) was a greater value compared with the Zinc Phosphate- Alginate sample (-θ 10°/96 h) and Zinc Phosphate- Polyvinyl Pyrrolidone/Hydroxy Apatite/Alginate (-θ 4.2°/96 h), indicating a transition from capacitive to inductive behavior with longer immersion times. © 2024 The Authors

关键词： Anti- corrosive Antibacterial Hydroxy apatite Polyvinyl pyrrolidone Potassium alginate Zinc phosphate nanoparticle

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