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Synthesis of an eco-friendly nanocomposite fertilizer for common bean based on carbon nanoparticles from agricultural waste biochar

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Pedosphere 2021年第6期31卷 923-933页

作者： Dina M.SALAMA Mahmoud e.ABD el-AZIZ mehrez e.el-naggar essam A.SHAABAN Mohamed S.ABD el-WAHeD Vegetable Research Department National Research Centre33 El Bohouth StreetDokkiGiza 12622(Egypt) Polymers&Pigments Department National Research Centre33 El Bohouth StreetDokkiGiza 12622(Egypt) Textile Research Division National Research Centre33 El Bohouth StreetDokkiGiza 12622(Egypt) Pomology Department National Research Centre33 El Bohouth StreetDokkiGiza 12622(Egypt) Botany Department National Research Centre33 El Bohouth StreetDokkiGiza 12622(Egypt)

The burning of agricultural waste is a major cause of environmental *** this study,we sought to prepare biochar from agricultural waste as a source material for the preparation of carbon nanoparticles(CNPs).Surface morphology,hydrodynamic particle size,and purity and crystallinity of CNPs were extensively investigated using transmission electron microscopy(TeM),zeta sizing,and X-ray diffraction(XRD)spectroscopy,*** CNPs were subsequently immersed in a solution of potassium nitrate(KNO_(3))to prepare a CNPs/NK nanocomposite(CNPs loaded with nitrogen(N)and potassium(K))as a nanocomposite fertilizer for common bean(Phaseolus vulgaris L.).The CNPs/NK nanocomposite was sprayed as a foliar fertilizer at 0,10,20,30,and 40 mg L^(-1) on common bean plants 25 d after sowing on a farm in Shebin el-Kom,el-Monifia,*** growth,yield,and quality of common bean were investigated during two successive growing seasons(2017 and 2018).The highest seed yields of 2.04 and 2.01 t ha^(-1) and the highest values of growth parameters including plant height of 61.5 and 59.2 cm,number of leaves per plant of 35 and 35,number of flowers per plant of 83.3 and 82.7,and plant fresh weight of 148.7 and 152.8 g plant^(-1) were obtained when using the CNPs/NK nanocomposite at a concentration of 20 mg L^(-1) during the 2017 and 2018 growing seasons,respectively.

关键词： foliar fertilizer N and K-loaded nanosized carbon particles Phaseolus vulgaris L. plant growth yield

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Preparation of epoxy resin/rare earth doped aluminate nanocomposite toward photoluminescent and superhydrophobic transparent woods

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Journal of Rare earths 2023年第3期41卷 397-405,I0003页

作者： mehrez e.el-naggar Sami Ullah S.Wageh M.A.Abu-Saied Tawfik A.Khattab Dalal Alhashmialameer Manal Abou Taleb e.A.Matter Institute of Textile Research and Technology National Research CenterDokkiCairo16221Egypt Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia K.A.CARe energy Research and Innovation Center King Abdulaziz UniversityJeddah21589Saudi Arabia Polymeric Materials Research Department Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTACITY)New Borg El-Arab CityAlexandria21934Saudi Arabia Department of Chemistry College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Chemistry College of Science and HumanitiesPrince Sattam Bin Abdulaziz UniversityAl-kharj11942Saudi Arabia Department of Polymer Chemistry National Center for Radiation Research and Technology(NCRRT)Egyptian Atomic Energy AuthorityNasr CityP.O.Box 7551Cairo11762Egypt Department of Chemistry Faculty of ScienceDamanhour University22111 DamanhourEgypt

A translucent wooden substrate with long-lasting phosphorescence,high photostability and durability,tough surface,ultraviolet protection,high optical transmittance,and superhydrophobicity was *** long-lasting phosphorescent wooden substrate is able to continue emitting light for extended time ***-modified wood(LMW)was immobilized with a solution of epoxy resin(eR)and rare-earth doped aluminate(ReDA)phosphor nanoparticles(NPs).For an improved dispersion of pigment,ReDA was synthesized in a nanoscale particle size,and characterized by transmission electron microscopy(TeM)to indicate a particle size of 8-14 *** crystal structure of ReDA nanoparticles was also proved by X-ray diffraction(XRD).For an improved production of long-persistent phosphorescent colo rless woods,ReDA must be well-dispersed in MAA without *** and emissio n,as well as decay and lifetime spectra were *** morphologies of the wooden substrates with different ratios of ReDA were investigated by scanning electron microscopy(SeM),X-ray fluorescence(XRF)analysis,Fourier transform infrared spectra(FT-IR),elemental mapping,and energy-dispersion Xray(eDXA).The phosphorescent woods show changes in color from colorless to green under ultraviolet(UV)irradiation,and to yellowish-green in the dark,as proved by the colorimetric parameters of the CIe Lab *** afterglow wood samples display an absorbance band at 365 nm and two phosphorescent bands at 431 and 520 *** UV shielding,photostability,and hydrophobicity were *** increasing ReDA ratio,both static contact and slide angles are found to improve in the ranges of147.6°-163.6°and 9°-14°,*** long-lasting photoluminescence is optimized at a ReDA ratio of 8%.The present strategy shows a large-scale production approach of multiple functional woods for many potential applications,such as smart glow in the dark windows and safety signs.

关键词： Translucent wood Rare-earth doped aluminate Superhydrophobic Long-lasting light emission Ultraviolet protection

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高效去除废水中农药重金属以及f-MWCNTs/PVA 纳米复合膜的抗菌活性

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绿色包装 2019年第3期 74-74页

作者： Ahmed M.Youssef mehrez e.el-naggar Farag M.Malhat Haytham M.el Sharkawi 不详

本文提出了一种不同浓度功能化多壁碳纳米管(f-MWCNTs)与聚乙烯醇(PVA)共混制备交联纳米复合膜的方法。由于MWCNTs的水溶性差、表面化学性质差、不具有柔性以及自身不能形成薄膜复合材料,这些缺点限制了其各种的应用。因此,为了改善它... 详细信息

本文提出了一种不同浓度功能化多壁碳纳米管(f-MWCNTs)与聚乙烯醇(PVA)共混制备交联纳米复合膜的方法。由于MWCNTs的水溶性差、表面化学性质差、不具有柔性以及自身不能形成薄膜复合材料,这些缺点限制了其各种的应用。因此,为了改善它们的物理性能,特别是在环境应用方面提供更好的潜力,它们的改性和PVA 的混合促进了这一过程。这就汇集了这两种材料的优点,形成疏水膜,能够从废水中捕获重金属、农药、细菌和真菌,具有良好的可循环利用性。柠檬酸交联剂是用来支持f-MWCNTs/ PVA 直接转换成纳米复合材料,通过培养皿和干燥60 ℃。所得数据表明,将f-MWCNTs浓度提高到8%可以提高重金属的去除效率。此外,随着f-MWCNTs 浓度的增加,农药捕获量也在增加。对纳米复合材料中f-MWCNTs的抑菌活性和真菌种类进行了评价,结果表明,在高负载的f-MWCNTs作用下,纳米复合材料的抑菌活性明显增强。这些结果验证了纳米复合膜作为废水处理的一部分的前景和经济可行的技术。

关键词：纳米复合膜废水处理重金属农药抗菌活性纳米复合材料多壁碳纳米管 MWCNTs

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Comparison between seismic analysis of twisting and regular 52-story towers considering soil-structure interaction

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earthquake engineering and engineering Vibration 2024年第3期23卷 663-675页

作者： Mohamed Naguib Abouelsaad Mohammed Shaaban Salah el Bagalaty Mohamed e.el Madawy Structural engineering Department Faculty of EngineeringMansura UniversityMansoura 35511Egypt Faculty of engineering Delta University for Science and TechnologyGamasa 35712Egypt

A dynamic analysis of both twisting and regular towers is carried out to determine the results of considering soil-structure interaction(SSI)on high-rise *** addition,the difference between the seismic performance of using twisting towers over regular ones is *** twisting tower is a simulation of the evolution Tower(Moscow).The towers’skeletons consist of RC elements and rest on a reinforced concrete piled-raft *** soil model is considered as multi-layered with the same soil properties as the zone chosen for the analysis(New Mansoura City,egypt).The only difference between both towers is their shape in *** whole system is modelled and analyzed in a single step as one full 3D model,which is known as the direct approach in *** analyses are carried out using finite.element software(Midas GTS NX).Dynamic output responses due to three records of seismic loads are proposed and presented in some *** on the results,it is concluded that SSI has a considerable effect on the dynamic response of tall buildings mainly because of the foundation flexibility,as it leads to lengthening the vibration period,increasing the story drift and the base shear for both cases.

关键词： soil-structure interaction seismic analysis twisting towers base shear story drift finite.element method Midas GTS NX

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A Novel Approach in Hydrogeochemical exploration for Uranium Mineralization:an example from West Central Sinai,egypt

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Acta Geologica Sinica(english edition) 2015年第6期89卷 1895-1913页

作者： Ahmed e.el-RAYeS Mohamed O.ARNOUS Suez Canal University Faculty of SciencesGeology Department

Groundwater in contact with ore deposits may acquire a chemical composition that could be used as a guide for exploration. eight well-water samples are collected from a known uraniummineralized area near Abu Zenima, west central Sinai to examine the applicability of using the hydrogeochemical technique in the search for uranium mineralization in similar arid areas. The analytical chemical data of the ground water is compared with ground radiometric measurements. The obtained results indicate that groundwater affected by uranium mineralization has a specific relativity of major anions expressed essentially as SO_4〉Cl〉HCO_3 and to a lesser extent as Cl〉SO_4〉HCO_3, associated as a rule with low magnesium content. This association constitutes a signature of uranium mineralization on the composition of groundwater in west central Sinai and could be used as an important exploration guide in the search for uranium deposits in similar areas. Anomalies in Ni, Fe, Zn and Cr and other pathfinder elements in groundwater can furnish geochemical guides to uranium ores. The immobile trace.element anomalies, including Zn, Ni and Fe are strongly distributed near the orebody; whereas the relatively mobile trace.elements, including Co, U, V and Cr, constitute the dispersion haloes away from the orebody. A new hydrogeochemical discrimination diagram is constructed to be used as a quick and cost effective exploration tool in the search for uranium occurrences in environmentally similar arid areas. Based on the obtained results, a new site for uranium occurrence, west of W. Baba, is delineated and recommended for future detailed geological and geochemical surveying.

关键词： Hydrogeochemical exploration Uranium ores geospatial mapping graphical explorationtool remote sensing Sinai

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Hydrothermal Characteristics of Blended Cement Pastes Containing Silica Sand Using Cement Kiln Dust as an Activator

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Journal of Materials Science & Technology 2002年第5期18卷 474-478页

作者： S.A.Abo-el-enein F.I.el-Hosiny e.el-Shimy T.A.Osman Faculty of Sci. Ain Shams Univ. Abbassia-Cairo Egypt Building Res. Cent. Cairo P. O. Box 1770 Egypt

The hydrothermal reactivity of silica sand was studied using cement kiln dust (CKD) as an activator in addition to the Portland cement fraction of el-Karnak cement (a blend of ordinary Portland cement and ground sand). Autoclaved eI-Karnak cement pastes were studied at pressures of 0.507, 1.013 and 1.520 MPa of saturated steam with respect to their compressive strength, kinetics of hydrothermal reaction and the phase composition of the formed hydrates. The role of CKD in affecting the physicochemical and mechanical properties of eI-Karnak cement pastes was studied by autoclaving of several pastes containing 5, 7.5, 10 and 20% CKD at a pressure of 1.013 MPa of saturated steam. CKD was added either as a raw CKD (unwashed) or after washing with water (washed CKD). The results of these physicochemical studies obtained could be related as much as possible to the role of CKD (raw or washed) in affecting the hydrothermal reactivity of silica sand in eI-Karnak cement pastes.

关键词： Blended cement Silica Cement kiln dust Hydrothermal characteristics

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extraordinary piezoelectric effect induced in two-dimensional rare earth monochalcogenides via reducing system dimensionality

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Journal of Materiomics 2023年第1期9卷 72-81页

作者： Neveen I.Atallah Maged el-Kemary Fabien Pascale Khaled e.el-Kelany Institute of Nanoscience and Nanotechnology Kafrelsheikh University33516Kafr el-skiekhEgypt Universite de Lorraine-Nancy CNRSLaboratoire de Physique et Chimie TheoriquesUMR 7019Vandoeuvre-les-NancyFrance

Piezoelectricity is pivotal for applications in micro/nanoelectromechanical systems(MeMS/NeMS).Inducing such a property in 2D systems via the reduction of the dimensionality of their corresponding 3D bulk is here *** on DFT theory and Gaussian-type-localized basis sets,the structural,electronic,mechanical,and piezoelectric properties of both 3D and 2D rare earth monochalcogenides RmX(Rm=Tm,Yb,Lu,and X=S,Se,Te)are investigated using the CRYSTAL *** intriguingly,the 2D LuX compounds display a buckled structure,where the Lu and X atoms protrude from the monolayer surface leading to an additional out-of-plane piezoelectric effect;(e_(31)=2104.84,1770.28,1689.79 pC/m,and d31=56.37,49.76,and 147.90 pm/V for LuS,LuSe,and LuTe,respectively).Such piezoelectric response is two orders of magnitude larger than the one of recently reported 2D ferroelectric MXenes,and is nearly thirty times larger than the commonly used AlN and GaN bulk ***,the reduced elastic constants obtained,when compared to other 2D materials,confirm the flexibility and softness of the considered 2D systems.

关键词： 2D materials Rare earth monochalcogenides DFT Gaussian basis CRYSTAL code Piezoelectric effect MeMS/NeMS

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3D finite.element analysis of composite noise barrier con- structed of polyurethane products

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Frontiers of Structural and Civil engineering 2017年第1期11卷 100-110页

作者： Ben DAee Hesham el naggar Department of Civil and environmental engineering the University of Western Ontario London ON N6A 5B9 Canada

This paper presents a numerical investigation on the structural performance of an innovative noise barrier consisting of poly-block, rigid polyurethane foam （RPF） and polyurea. The mechanical characteristics of RPF as well as the flexural resistance of the proposed wall system （poly-wall） were established and presented in another study. The experimental results are used in the current study to de.elop, calibrate and verify 3D finite.element （Fe） models of the wall system. The components of the poly-wall including steel rebars, poly-blocks and RPF cores were simulated and then verified using the results of experiments conducted on the wall components. The results of numerical analysis exhibited a satisfactory agreement with the experimental outcomes for the entire wall system. The verified numerical models were then used to conduct a parametric study on the performance of poly-wall models under uniform wind load and gravity load. The findings of the current study confirmed that the structural performance of poly-wall is satisfactory for noise barrier application. Simulation techniques for improvement of the numerical analysis of multi-martial 3D Fe models were discussed.

关键词： 3D finite.element sound wall rigid polyurethane foam poly-wall numerical model calibration

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Problems of drinking water treatment along Ismailia Canal Province, egypt

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第3期9卷 232-242页

作者： Mohamed H.GeRIeSH Klaus-Dieter BALKe Ahmed e.el-RAYeS Geology Department Faculty of ScienceSuez Canal UniversityP.C.41522IsmailiaEgypt Institute of Geosciences Teubingen University72076 TeubingenGermany

The present drinking water purification system in egypt uses surface water as a raw water supply without a preliminary filtration *** the other hand,chlorine gas is added as a disinfectant agent in two steps,pre-and *** to these reasons most of water treatment plants suffer low filtering effectiveness and produce the trihalomethane(THM) species as a chlorination *** Ismailia Canal represents the most distal downstream of the main Nile *** its water contains all the proceeded pollutants discharged into the *** addition,the downstream reaches of the canal act as an agricultural drain during the closing period of the High Dam gates in January and February every ***,the wide industrial zone along the upstream course of the canal enriches the canal water with high concentrations of heavy *** obtained results indicate that the canal gains up to 24.06×106 m3 of water from the surrounding shallow aquifer during the closing period of the High Dam gates,while during the rest of the year,the canal acts as an influent stream losing about 99.6×106 m3 of its water *** reduction of total organic carbon(TOC) and suspended particulate matters(SPMs) should be one of the central goals of any treatment plan to avoid the disinfectants *** combination of sedimentation basins,gravel pre-filtration and slow sand filtration,and underground passage with microbiological oxidation-reduction and adsorption criteria showed good removal of parasites and bacteria and complete.elimination of TOC,SPM and heavy ***,it reduces the use of disinfectants chemicals and lowers the treatment ***,this purification system under the arid climate prevailing in egypt should be tested and modified prior to application.

关键词： Drinking water treatment Hazardous by-products Natural attenuation Ismailia Canal egypt

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GIS-based flash flooding susceptibility analysis and water management in arid mountain ranges:Safaga Region,Red Sea Mountains,egypt

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Journal of Mountain Science 2023年第12期20卷 3665-3686页

作者： Ahmed e.el-RAYeS Mohamed O.ARNOUS Ahmed M.HelMY Geology Department Faculty of ScienceSuez Canal UniversityIsmailia 41522Egypt Geology Department Faculty of ScienceArish UniversityArish 45511 North SinaiEgypt

The Safaga Region(SR)is part of the Red Sea mountain range in *** flash flooding is now an inescapable event,wreaking havoc and causing massive loss of life and *** majority of the floodwater,however,has been wasted as runoff to the Red Sea,which,if used wisely,could meet a fraction of the water demands for a variety of applications in this *** current work aims to use GIS techniques to integrate remote sensing data for evaluating,mitigating,and managing flash floods in *** data set comprised Tropical Rainfall Measuring Mission(TRMM)thematic rainfall data,1:50,000 scale topographical map sheets,geological maps,the ASTeR Digital elevation Model(ASTeR GDeM),Landsat 7 enhanced Thematic Mapper"(eTM7+),and Landsat 8 Operational Land *** flash flood risk model of SR is de.eloped using ArcGIS-10.3 geoprocessing tools integrating all the causal factors thematic *** final flood risk model for the SR suggests that 57%of the total basins in the SR are at high risk of *** 38%of all basins are at moderate flood *** remaining 5%of basins are less prone to ***-prone zones were identified,suitable dam-building sites were located,and extre.ely probable areas for water recharge were *** the basis of reliable scientific data,structural and non-structural mitigation strategies that might reduce the damage susceptibility,alleviate the sensitivity of the flash flood,and best utilize its water supply were recommended.

关键词： Flash floods GIS Susceptibility Water management Arid mountains egypt

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