Showing 4,841 - 4,860 results of 5,119 for search '"pollutant"', query time: 0.13s Refine Results
  1. 4841

    Greenhouse gas emissions (GHGE), water footprint and nitrogen loss associated with food consumption among adults: findings from the updated LEBANese natiONal food consumption surve... by Maha Hoteit, Maroun Khattar, Esraa Antar, Dana Malli, The Adults-Lebanon-FCS Group

    Published 2025-01-01
    “…Abstract Background Lebanon is grappling with numerous environmental challenges, including water scarcity, landfill waste, deforestation, and rising air pollution. Food choices significantly influence global greenhouse gas emissions and environmental impacts, making it crucial to evaluate the environmental footprints (EFPs) of Lebanon’s current dietary habits. …”
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  2. 4842

    Gaussian Process Regression Total Nitrogen Prediction Based on Data Decomposition Technology and Several Intelligent Algorithms by WANG Yongshun, CUI Dongwen

    Published 2023-01-01
    “…Total nitrogen (TN) is one of the important indicators to reflect the degree of water pollution and measure the eutrophication status of lakes and reservoirs.To improve the accuracy of TN prediction,based on the empirical wavelet transform (EWT) and wavelet packet transform (WPT) decomposition technology,this paper proposes a Gaussian process regression (GPR) prediction model optimized by osprey optimization algorithm (OOA),rime optimization algorithm (ROA),bald eagle search (BES) and black widow optimization algorithm (BWOA) respectively.Firstly,the TN time series is decomposed into several more regular subsequence components by EWT and WPT respectively.Then,the paper briefly introduces the principles of OOA,ROA,BES,and BWOA algorithms and applies OOA,ROA,BES,and BWOA to optimize GPR hyperparameters.Finally,EWT-OOA-GPR,EWT-ROA-GPR,EWT-BES-GPR,EWT-BWOA-GPR,WPT-OOA-GPR,WPT-ROA-GPR,WPT-BES-GPR,WPT-BWOA-GPR models (EWT-OOA-GPR and other eight models for short) are established to predict the components of TN by the optimized super-parameters.The final prediction results are obtained after reconstruction,and WT-OOA-GPR,WT-ROA-GPR,WT-BES-GPR and WT-BWOA-GPR models based on wavelet transform (WT) are built.Eight models,including EWT-OOA-SVM based on support vector machine (SVM),the paper compares the unoptimized EWT-GPR,WPT-GPR models,and the uncomposed OOA-GPR,ROA-GPR,BES-GPR,and BWOA-GPR models.The models were verified by the monitoring TN concentration time series data of Mudihe Reservoir,an important drinking water source in China,from 2008 to 2022.The results are as follows.① The average absolute percentage error of eight models such as EWT-OOA-GPR for TN prediction is between 0.161% and 0.219%,and the coefficient of determination is 0.999 9,which is superior to other comparison models,with higher prediction accuracy and better generalization ability.② EWT takes into account the advantages of WT and EMD.WPT can decompose low-frequency and high-frequency signals at the same time.Both of them can decompose TN time series data into more regular modal components,significantly improving the accuracy of model prediction,and the decomposition effect is better than that of the WT method.③ OOA,ROA,BES,and BWOA can effectively optimize GPR hyperparameters and improve GPR prediction performance.…”
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  3. 4843

    Comparison of the extraction efficiencies of four different solvents used in trace metal digestion of selected soils within Abakaliki, Nigeria by NO Omaka, IF Offor, ER Chukwu, U Ewuzie

    Published 2015-07-01
    “…Soil pollution by trace metals is one of the major global environmental challenges facing us today. …”
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  4. 4844

    Effect of feeding rate and composition for bioconversion of wastewater treatment plant sludge from the milk and creamer processing industries using black soldier fly larvae by Ursada Riang, Bagastyo Arseto Yekti, Purnomo Alfan

    Published 2025-01-01
    “…Wastewater treatment plant (WWTP) produces sludge deposits needing further treatment and handling to prevent pollution. Food and beverage industry sludge, rich in organic matter and nutrients, serves as a biomass source. …”
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  5. 4845

    Co-optimising frequency-containment services from zero-carbon sources in electricity grids dominated by Renewable Energy Sources by Aimon Mirza Baig, Luis Badesa, Yi Wang, Goran Strbac

    Published 2025-03-01
    “…Therefore, it becomes critical to investigate alternative ways to guarantee grid stability without resorting to polluting assets, as emissions targets would be unattainable otherwise. …”
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  6. 4846

    Super Dosing of IP6 Phytase in Phosphorus-Deficit Diets to Replace Added Phosphorus and Evaluate Growth Performance, Nutrient Digestibility and Bone Mineralization of Broiler Chick... by Bahadur Ali, Muhammad Irfan

    Published 2025-01-01
    “… Phosphorus in phytate is poorly available to monogastric animals due to their lack of the phytase enzyme, leading to increased phosphorus excretion and environmental pollution. Additionally, broiler diets high in phytate and low in available phosphorus negatively affect growth performance, nutrient absorption, and bone mineralization. …”
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  7. 4847

    Atmospheric Wet Deposition of PCDD/Fs in the Ambient Air by Xueying Tian, Kangping Cui, Hwey-Lin Sheu, Yen-Kung Hsieh, Fanxuan Yu

    Published 2021-05-01
    “…Abstract Wet deposition is an important mechanism for removing air pollutants from the atmosphere. The total PCDD/Fs-WHO2005-TEQ wet deposition from 2018–2020 was investigated for Beijing and Tianjin City in this study. …”
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  8. 4848

    Synthesis, Characterization, and Evaluation of the Remediation Activity of Cissus quadrangularis Zinc Oxide Nanoparticle-Activated Carbon Composite on Dieldrin in Aqueous Solution by Calvince Ondijo, Fredrick Kengara, Isaac K’Owino

    Published 2022-01-01
    “…This study recommends testing the remediation potential of the synthesized nanocomposite on other persistent organic pollutants.…”
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  9. 4849
  10. 4850

    Study of the impact on emissions and engine performance of diesel fuel additives made from cotton and castor blended seed oils by Hailegebrel Zewdie Woldetensy, Dinku Seyoum Zeleke, Getachew Shunki Tibba

    Published 2025-01-01
    “…Many approaches have been implemented in order to reduce the emissions of particular pollutants without compromising engine performance. …”
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  11. 4851

    Precipitation Chemistry and Occurrence of Acid Rain over the Oil-Producing Niger Delta Region of Nigeria by John Kanayo Chukwu Nduka, Orish Ebere Orisakwe

    Published 2010-01-01
    “…Crude oil exploration and gas flaring in the Niger Delta, and multiplicity of cottage industries in Awka, impacted on the inorganic ion pollution of the rainwater. This may have public health implications in the region.…”
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  12. 4852

    Application of microbially induced calcite precipitation to mitigate soil frost heave by M.F. Nikshoar, M.A. Rowshanzamir, S.M. Abtahi, S. Soleimanian-Zad

    Published 2023-04-01
    “…This study aims to investigate the possibility of using the microbially induced calcite precipitation method to control soil frost heave for less pollution introduction to the soil.METHODS: In this study, the Sporosarcina Pasteurii bacterium was used for calcite precipitation. …”
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  13. 4853

    Nutrient Management Programs, Nitrogen Fertilizer Practices, and Groundwater Quality in Nebraska’s Central Platte Valley (U.S.), 1989–1998 by Stan Daberkow, Harold Taylor, Noel Gollehon, Milt Moravek

    Published 2001-01-01
    “…Given the societal concern about groundwater pollution from agricultural sources, public programs have been proposed or implemented to change farmer behavior with respect to nutrient use and management. …”
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  14. 4854

    Integration of carbon dioxide sensor with GNSS receiver for dynamic air quality monitoring applications by Lin Yola, Garrin Alif Nanditho, Kaito Kobayashi, Dinesh Manandhar

    Published 2024-01-01
    “…Air pollution is a significant problem in big cities due to the rapid increase of anthropogenic activities and severe traffic congestion. …”
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  15. 4855

    Time Series Prediction of COD<sub>Mn</sub> in Dianchi Lake Based on Data Decomposition and NARX Optimization by WANG Yongshun, CUI Dongwen

    Published 2024-07-01
    “…The permanganate index (COD<sub>Mn</sub>) is one of the important indicators for measuring the degree of pollution of water bodies by reducing substances. To improve the prediction accuracy of COD<sub>Mn</sub>, a WPT-SHIO-NARX COD<sub>Mn</sub> time series prediction model is proposed, which combines wavelet packet transform (WPT), success history intelligent optimization (SHIO) algorithm, and nonlinear autoregressive neural network (NARX). …”
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  16. 4856
  17. 4857

    Accident Management System Based on Vehicular Network for an Intelligent Transportation System in Urban Environments by Yusor Rafid Bahar Al-Mayouf, Omar Adil Mahdi, Namar A. Taha, Nor Fadzilah Abdullah, Suleman Khan, Muhammad Alam

    Published 2018-01-01
    “…A consequence of this has been congestion of traffic, more accidents, and pollution. Accidents are a still major cause of death, despite the development of sophisticated systems for traffic management and other technologies linked with vehicles. …”
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  18. 4858

    Effect of Palm Kernel Shell Ash Supplement with Egg Shell Ash on Stabilized Lateritic Soil for a Road Work by Sulaiman Olayinka Subair

    Published 2025-01-01
    “…These materials can contribute to environmental degradation, including air and water pollution, and adversely affect local ecosystems. This study explores the effects of Palm Kernel Shell Ash (PKSA) and Egg Shell Ash (ESA) on the stabilization of lateritic soil for use in road pavement applications. …”
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  19. 4859

    Impact of COVID-19 Control Measures on Trace Gases (NO2, HCHO and SO2) and Aerosols over India during Pre-monsoon of 2020 by Mriganka Sekhar Biswas, D. C. Ayantika

    Published 2020-10-01
    “…In this present study we evaluate and quantify the changes in pollutants across six different geographical zones along with the six most populous cities in the country. …”
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  20. 4860

    Effects of Precipitation on the Air Quality Index, PM2.5 Levels and on the Dry Deposition of PCDD/Fs in the Ambient Air by Ruoxin Wang, Kangping Cui, Hwey-Lin Sheu, Lin-Chi Wang, Xueyan Liu

    Published 2023-03-01
    “…This is because rainwater removes particles or dissolved gaseous pollutants from the atmosphere and brings aerosols to the ground. …”
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