检索结果-南通市图书馆

Erratum on “Complexation of radionuclide 152+154Eu（Ⅲ） with alumina-bound fulvic acid studied by batch and time-resolved laser fluorescence spectroscopy” [Sci. China Chem., 2017, 60: 107–114]

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第12期62卷 1732-1733页

作者： Xiangxue Wang Shujun Yu Zhongshan Chen Wencheng Song Yuantao Chen Tasawar Hayat ahmed alsaedi Wei Guo Jun Hu Xiangke Wang School of Environment and Chemical Engineering North China Electric Power UniversityBeijing 102206China Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions China Department of Chemistry Qinghai Normal University810008XiningQinghaiChina NAAM Research Group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics Quaid-I-Azam UniversityIslamabad 44000Pakistan

In the above referenced publication[1],the Figure 5 and data in Table 1 are correct,but we ignored to present the final pH values of the system,which is very important to understand the properties.

关键词： properties. Figure batch

不同pH条件下硫化钼纳米片吸附Cd(Ⅱ)的微观机制研究

在线全文

学校读者我要写书评

暂无评论

无机材料学报 2020年第3期35卷 293-300,I0006-I0009页

作者：董丽佳郭筱洁李雪陈朝贵金阳 ahmed alsaedi TASAWAr Hayat 赵轻舟盛国栋绍兴文理学院生命科学院绍兴312000 杭州电子大学材料与环境工程学院杭州310018 NAAM Research Group Department of MathematicsFaculty of ScienceKing Abdulaziz UniversityJeddah 21589Sudi Arabia Department of Mathematics Quaid-I-Azam UniversityIslamabad 44000Pakistan 中国科学院大学资源与环境学院北京100049 绍兴文理学院化学与化工学院绍兴312000

本研究结合静态实验和X射线吸收精细结构谱学(EXAFS)评估了硫化钼纳米片对重金属Cd(Ⅱ)的吸附行为和微观机制。结果表明:Cd(Ⅱ)在硫化钼纳米片上的吸附受溶液pH、反应时间和温度的显著影响,但不受离子强度的影响。在pH 3.3~9.6范围内, p... 详细信息

本研究结合静态实验和X射线吸收精细结构谱学(EXAFS)评估了硫化钼纳米片对重金属Cd(Ⅱ)的吸附行为和微观机制。结果表明:Cd(Ⅱ)在硫化钼纳米片上的吸附受溶液pH、反应时间和温度的显著影响,但不受离子强度的影响。在pH 3.3~9.6范围内, pH升高显著促进了硫化钼对Cd(Ⅱ)的吸附量,但不改变吸收速率、吸附等温线和热力学。二级动力学模型能更好地拟合该吸附平衡,且内表面颗粒扩散模型显示了吸附过程中的三个典型阶段。等温线和热力学分析说明Cd(Ⅱ)在硫化钼上的吸附是异质性的、自发的、吸热的和不可逆的过程。EXAFS光谱学分析揭示了该吸附存在两种类型:在较低的pH(3.56,6.48)条件下,内表面络合以Cd–S配位键为主;在较高的pH(9.57)条件下,出现Cd(OH)2沉淀,且配位键以Cd–O和Cd–Cd的形式存在。这些研究结果对于评估重金属离子和硫化钼纳米片在分子水平上的作用机理提供了新的视野。

关键词：硫化钼纳米片 pH 微观结构 EXAFS Cd(Ⅱ)

花状氧化铁的制备及其在废水处理中的应用(英文)

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2014年第8期15卷 671-680页

作者： Kun XIE Xiang-xue WANG Zheng-jie LIU ahmed alsaedi Tasawar HAYAT Xiang-ke WANG Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir Chongqing Three Gorges University Institute of Plasma Physics Chinese Academy of Sciences NAAM Research Group Department of Mathematics Faculty of Science King Abdulaziz University Faculty of Engineering King Abdulaziz University

研究目的:研究花状氧化铁的制备并探讨其对砷的吸附性能和亚甲基蓝的催化性能。创新要点:1.合成了花状氧化铁;2.发现Langmuir模型能更好地模拟砷的吸附过程;3.发现花状氧化铁对亚甲基蓝有很好的催化降解性能。研究方法:1.使用扫描电镜... 详细信息

研究目的:研究花状氧化铁的制备并探讨其对砷的吸附性能和亚甲基蓝的催化性能。创新要点:1.合成了花状氧化铁;2.发现Langmuir模型能更好地模拟砷的吸附过程;3.发现花状氧化铁对亚甲基蓝有很好的催化降解性能。研究方法:1.使用扫描电镜、投射电镜、X射线衍射和BET比表面及孔径分析仪对合成的花状氧化铁进行表征;2.采用静态实验法研究砷的吸附性能及亚甲基蓝的催化行为。重要结论:1.采用一种低成本的溶剂热法合成了花状氧化铁;2.合成的花状氧化铁有着较大的比表面积并对砷有着很好的吸附性能,并且吸附率随着pH的增加而降低。同时发现Langmuir模型能更好地模拟砷的吸附过程;3.亚甲基蓝的初始浓度和花状氧化铁的用量对催化性能影响较为明显,花状氧化铁有较好的重复利用性;4.合成的花状氧化铁可以应用于大批废水的处理。

关键词：花状氧化铁砷吸附亚甲基蓝光降解

低温等离子体改性碳纳米管及其对U(Ⅵ)的吸附性能研究

在线全文

学校读者我要写书评

暂无评论

中国科学：化学 2019年第1期49卷 184-194页

作者：孙菊王亚男段升霞 Tasawar Hayat ahmed alsaedi 李家星中国科学院等离子体物理研究所合肥230031 中国科学技术大学合肥230026 阿卜杜勒阿齐兹国王大学沙特阿拉伯吉达21589

采用低温等离子体法将O-磷酸乙醇胺(O-PEA)接枝到多壁碳纳米管表面(MWCNTs),并使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)和拉曼光谱(Raman)表征改性前后的MWCNTs的物化性质.通过静态吸... 详细信息

采用低温等离子体法将O-磷酸乙醇胺(O-PEA)接枝到多壁碳纳米管表面(MWCNTs),并使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)和拉曼光谱(Raman)表征改性前后的MWCNTs的物化性质.通过静态吸附实验研究改性碳纳米管对溶液中U(Ⅵ)的吸附容量,同时,还研究了吸附时间、pH、离子强度和温度对吸附性能的影响.结果表明,通过低温等离子体法改性后的MWCNTs(PTMWCNTs-4)对U(Ⅵ)的吸附性能最好,其吸附容量大约是未改性MWCNTs吸附量的3倍.改性后的MWCNTs吸附速率更快. PTMWCNTs-4对U(Ⅵ)的吸附在pH7.0条件下受离子强度影响,属于外层络合机理或离子交换.热力学数据表明,吸附过程放热且可自发进行.本文为U(Ⅵ)的有效去除提供了一种新型环保的改性方法.

关键词：低温等离子体碳纳米管吸附 U(VI)

时标上带有反馈控制的非自治两种群竞争系统的概周期解

在线全文

学校读者我要写书评

暂无评论

数学物理学报（A辑） 2017年第4期37卷 730-750页

作者：李周红张丰硕曹进德 alsaedi ahmed Alsaadi Fuad E 玉溪师范学院数学系云南玉溪653100 东南大学数学学院南京210096 Department of Mathematics Faculty of ScienceKing Abdulaziz University Nonlinear Analysis and Applied Mathematics Research Group Department of MathematicsKing Abdulaziz University Department of Electrical and Computer Engineering Faculty of EngineeringKing Abdulaziz University

该文利用时标理论,研究了一类时标上带有反馈控制的非自治两种群竞争系统.首先应用微分不等式和比较原理得到了系统的持久性,在此基础上,构造了一个合适的Lyapunov泛函,得到系统存在概周期解的充分条件.进一步,应用一个例子的数值模拟... 详细信息

该文利用时标理论,研究了一类时标上带有反馈控制的非自治两种群竞争系统.首先应用微分不等式和比较原理得到了系统的持久性,在此基础上,构造了一个合适的Lyapunov泛函,得到系统存在概周期解的充分条件.进一步,应用一个例子的数值模拟验证了该文结果的有效性.

关键词：概周期解持久竞争系统反馈控制时标

Consecutive narrow and broad quasi-periodic fast-propagating wave trains associated with a flare

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 200-211页

作者： Xinping Zhou Yuandeng Shen Chengrui Zhou Zehao Tang ahmed ahmed Ibrahim College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610068China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

The excitation mechanism of coronal quasi-period fast-propagating(QFP)wave trains remains *** Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory observations,we study a narrow and a broad QFP wave trains excited one after another during the successive eruptions of filaments hosted within a fan-spine magnetic system on October 20,*** consecutive occurrence of these two types of QFP wave trains in the same event provides an excellent opportunity to explore their excitation mechanisms and compare their physical *** observational results reveal that narrow and broad QFP wave trains exhibit distinct speeds,periods,energy fluxes,and relative intensity amplitudes,although originating from the same active region and being associated with the same GOES C2.9 *** wavelet analysis,we find that the narrow QFP wave train shares a similar period with the flare itself,suggesting its possible excitation through the pulsed energy release in the magnetic reconnection process that generated the accompanying *** the other hand,the broad QFP wave train appears to be associated with the energy pulses released by the successive expansion and unwinding of filament ***,it is plausible that the broad QFP wave train was also excited by the sequential stretching of closed magnetic field lines driven by the erupting *** findings shed light on the different excitation mechanisms and origins of the QFP wave trains.

关键词： narrow wave excitation

Study of scalar particles through the Klein–Gordon equation under rainbow gravity effects in Bonnor–Melvin-Lambda space-time

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第4期76卷 113-125页

作者： Faizuddin ahmed Abdelmalek Bouzenada Department of Physics University of Science&Technology MeghalayaRi-Bhoi793101India Laboratory of theoretical and applied Physics Echahid Cheikh Larbi Tebessi UniversityAlgeria

In our investigation,we explore the quantum dynamics of charge-free scalar particles through the Klein–Gordon equation within the framework of rainbow gravity,considering the Bonnor–Melvin-Lambda(BML)space-time *** BML solution is characterized by the magnetic field strength along the axis of the symmetry direction which is related to the cosmological constantΛand the topological parameterαof the *** behavior of charge-free scalar particles described by the Klein–Gordon equation is investigated,utilizing two sets of rainbow functions:(i)f(χ)=■,h(χ)=1 and(ii)f(χ)=1,h(χ)=1+βХ/*** 0<(Х=■)≤1 with E representing the particle's energy,Ep is the Planck's energy,andβis the rainbow *** obtain the approximate analytical solutions for the scalar particles and conduct a thorough analysis of the obtained ***,we study the quantum dynamics of quantum oscillator fields within this BML space-time,employing the Klein–Gordon *** also,we choose the same sets of rainbow functions and obtain the approximate eigenvalue solution for the oscillator ***,we demonstrate that the relativistic approximate energy profiles of charge-free scalar particles and oscillator fields get influenced by the topology of the geometry and the cosmological ***,we show that the energy profiles of scalar particles receive modifications from the rainbow parameter and the quantum oscillator fields by both the rainbow parameter and the frequency of oscillation.

关键词： quantum fields in curved space-time relativistic wave equations solutions of wave equations bound-state special functions

Application of Synthetic Iron Oxyhydroxide with Influencing Factors for Removal of As(Ⅴ) and As(Ⅲ) from Groundwater

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第3期35卷 998-1009页

作者： Shakeel ahmed Talpur Muhammad Yousuf Jat Baloch Chunli Su Javed Iqbal Aziz ahmed Hafeez ahmed Talpur School of Environmental Studies China University of GeosciencesWuhan 430078China DiSPUTer Department of PsychologicalHealth and Territory SciencesUniversity“G.d′Annunzio”Chieti-Pescara66100 ChietiItaly College of New Energy and Environment Jilin UniversityChangchun 130021China School of Plant Environment and Soil SciencesLouisiana State University Agricultural CentreBaton Rouge LA 70803USA Department od Engineering and Geology University“G.d′Annunzio”Chieti-Pescara66100 ChietiItaly

Synthesized iron oxyhydroxide was applied for the adsorptive removal of As(V)and As(III)from the aquas ***,this investigation highlighted the synergistic effect of calcium carbonate in conjunction with iron oxyhydroxide,resulting in enhanced removal *** experiment was conducted under various conditions:concentration,dosage,pH,agitation,and *** characterizations such as Brunauer Emmett Teller,X-ray diffraction,scanning electron microscopy,and Fourier transform infrared spectroscopy were implied to understand adsorption *** Langmuir model revealed optimal concentrations for As(V)=500μg/L at pH-5 and As(III)=200μg/L at pH-7,resulting in 95%and 93%adsorption efficiencies,*** adsorption capacities“qm”were found to be 1266.943μg/g for As(V)and 1080.241μg/g for As(III).Freundlich model demonstrated favorable adsorption by indicating“n>1”such as As(V)=2.542 and As(III)=2.707;similarly,the speciation factor“RL<1”for both species as As(V)=0.1 and As(III)=0.5,*** kinetic study presented a pseudo-second-order model as best fitted,indicating throughout chemisorption processes for removing As(V)and As(III).Furthermore,incorporating calcium carbonate presented a significant leap in the removal efficiency,indicating As(V)from 95%to 98%and As(III)from 93%to 96%,*** findings offer profound motivation for developing effective and sustainable solutions to tackle arsenic contamination,underscoring the exceptional promise of iron oxyhydroxide in conjunction with calcium carbonate to achieve maximum removal efficiency.

关键词： adsorption arsenic As(V) As(III) iron oxyhydroxide isotherms kinetics groundwater.

Topological defects on solutions of the non-relativistic equation for extended double ring-shaped potential

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第8期76卷 29-43页

作者： Badredine Boudjedaa Faizuddin ahmed Natural Sciences and Materials Laboratory University Center Abdelhafid BoussoufMilaAlgeria Department of Mathematics Institute of Mathematics and Computer ScienceUniversity Center Abdelhafid BoussoufMilaAlgeria Department of Physics University of Science&Technology MeghalayaRi-Bhoi793101India

In this study, we focus into the non-relativistic wave equation described by the Schrodinger equation, specifically considering angular-dependent potentials within the context of a topological defect background generated by a cosmic string. Our primary goal is to explore quasi-exactly solvable problems by introducing an extended ring-shaped potential. We utilize the Bethe ansatz method to determine the angular solutions, while the radial solutions are obtained using special functions. Our findings demonstrate that the eigenvalue solutions of quantum particles are intricately influenced by the presence of the topological defect of the cosmic string,resulting in significant modifications compared to those in a flat space background. The existence of the topological defect induces alterations in the energy spectra, disrupting ***, we extend our analysis to study the same problem in the presence of a ring-shaped potential against the background of another topological defect geometry known as a point-like global monopole. Following a similar procedure, we obtain the eigenvalue solutions and analyze the results. Remarkably, we observe that the presence of a global monopole leads to a decrease in the energy levels compared to the flat space results. In both cases, we conduct a thorough numerical analysis to validate our findings.

关键词： non-relativistic wave-equation:Schrödinger equation topological defect:cosmic string point-like global monopole potential:extended ring-shaped potentials Bethe ansatz method