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Maize cob-derived activated carbon as an adsorbent for the removal of nickel (II) cation from aqueous solution: optimization and kinetic studies 玉米芯活性炭作为吸附剂去除水溶液中的镍(II)阳离子:优化和动力学研究
Q1 Mathematics Pub Date : 2023-10-12 DOI: 10.1080/25765299.2023.2266230
Mayowa Adeoye Lala, Zainab Omodunni Olomowewe, Adekunle Tirimisiyu Adeniyi, Abdulwahad Giwa
Adsorption performance of maize cob-derived activated carbon (MCAC) for the removal of nickel (II) from solution was investigated in the present study. The MCAC was prepared by adsorbent chemical activation method. Afterwards, the MCAC was characterized and utilized as the adsorbent for batch adsorption process. Initial adsorbate concentration, contact time and adsorbent dosage were considered as the independent variables for the adsorption process. The experiments were designed based upon central composite design (CCD) of response surface methodology with the aid of Design Expert. The experimental data were fitted into a model using MATLAB regression analysis, and the developed model was later simulated to obtain the operation parameters that will give the optimum removal efficiency. The analysis of variance (ANOVA) revealed that all the considered independent process variables had significant effect on the adsorption process. The simulated response from MATLAB gave 97.113% removal efficiency of nickel (II) on experimental validation at optimum conditions of 9.75 mg/L initial nickel (II) concentration, 120 min contact time and 0.803 g adsorbent dosage. This result correlates with CCD that predicted 97.6154% nickel (II) removal efficiency. The experimental data were observed to be best fitted to pseudo-second-order kinetic model which showed that the process is chemisorption controlled. Hence, it may be concluded from the present data that MCAC is highly effective for the removal of Ni(II) from aqueous solution and the highly generated agricultural waste (Maize cob) can the easily modified as a adsorbent.
研究了玉米芯活性炭(MCAC)对溶液中镍(II)的吸附性能。采用吸附化学活化法制备MCAC。随后,对MCAC进行了表征,并将其用作间歇吸附的吸附剂。以初始吸附浓度、接触时间和吸附剂用量为吸附过程的自变量。实验设计基于响应面法的中心复合设计(CCD),并借助于design Expert进行设计。利用MATLAB进行回归分析,将实验数据拟合到模型中,并对所建立的模型进行仿真,得到最优去除效率的操作参数。方差分析(ANOVA)表明,所有考虑的独立过程变量对吸附过程有显著影响。在初始镍(II)浓度为9.75 mg/L、接触时间为120 min、吸附剂投加量为0.803 g的条件下,对镍(II)的去除率为97.113%。该结果与CCD预测的镍(II)去除率为97.6154%相吻合。实验数据最符合拟二级动力学模型,表明该过程受化学吸附控制。因此,从目前的数据可以得出结论,MCAC对水溶液中Ni(II)的去除非常有效,并且高生成量的农业废弃物(玉米芯)可以很容易地作为吸附剂进行改性。
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引用次数: 0
Enhancing Network Intrusion Recovery in SDN with machine learning: an innovative approach 用机器学习增强SDN网络入侵恢复:一种创新方法
Q1 Mathematics Pub Date : 2023-09-25 DOI: 10.1080/25765299.2023.2261219
Mohamed Hammad, Nabil Hewahi, Wael Elmedany
In modern network environments, the swift recovery of network flow intrusions poses a substantial challenge. Particularly in the context of Software-Defined Networks (SDN), addressing this challenge necessitates the strategic selection of backup paths based on traffic patterns. In response to this critical issue, our paper introduces a groundbreaking approach known as Machine Learning-based Network Intrusion Recovery (MLBNIR) for enhancing intrusion recovery in SDN. We leverage a dedicated SDN dataset to train a flow-based Machine Learning (ML) model, enabling a deeper understanding of traffic dynamics within the SDN framework. Our study, presented in this paper, reveals that the MLBNIR approach significantly reduces intrusion recovery time by up to 90% and concurrently increases network bandwidth consumption by up to 57% when compared to existing methods reviewed in the literature.
在现代网络环境中,网络流入侵的快速恢复提出了巨大的挑战。特别是在软件定义网络(SDN)的背景下,解决这一挑战需要根据流量模式战略性地选择备份路径。针对这一关键问题,本文介绍了一种突破性的方法,称为基于机器学习的网络入侵恢复(MLBNIR),用于增强SDN中的入侵恢复。我们利用专用的SDN数据集来训练基于流量的机器学习(ML)模型,从而更深入地了解SDN框架内的流量动态。我们在本文中提出的研究表明,与文献中回顾的现有方法相比,MLBNIR方法显着减少了入侵恢复时间高达90%,同时增加了网络带宽消耗高达57%。
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引用次数: 0
Towards a new triple integral transform (Laplace–ARA–Sumudu) with applications 一种新的三重积分变换(Laplace-ARA-Sumudu)及其应用
Q1 Mathematics Pub Date : 2023-09-13 DOI: 10.1080/25765299.2023.2250569
Rania Saadeh, Abdelilah K. Sedeeg, Mohammad A. Amleh, Zahra I. Mahamoud
The main objective of this work is to introduce a novel generalization of double transformations called the triple Laplace–ARA–Sumudu transform (TLARAST). This hybrid transformation extends the concepts of double Laplace–Sumudu, double Laplace–ARA and double ARA–Sumudu transforms into a triple hybrid transform. The article provides the definition of TLARAST and investigates its fundamental properties, including existence, inverses and related theorems. Furthermore, new results concerning TLARAST for partial derivatives and the theorem of multi-convolution are introduced and discussed. The practicality and efficacy of TLARAST are demonstrated by applying it to solve various types of partial differential equations with significant applications in physics and other scientific fields, such as the heat equation, Laplace equation, Poisson equation and wave equation. The solutions are illustrated through figures created using Mathematica software. Overall, this study underscores the usefulness and efficiency of TLARAST in solving partial differential equations involving multiple variables.
这项工作的主要目的是引入一种新的二重变换的推广,称为三重拉普拉斯-阿拉-苏穆度变换(TLARAST)。该混合变换将双重Laplace-Sumudu、双重Laplace-ARA和双重ARA-Sumudu变换的概念扩展为三重混合变换。本文给出了TLARAST的定义,并研究了它的基本性质,包括存在性、逆性和相关定理。此外,还介绍和讨论了关于偏导数的TLARAST和多重卷积定理的新结果。通过求解热方程、拉普拉斯方程、泊松方程和波动方程等在物理和其他科学领域有重要应用的各类偏微分方程,证明了TLARAST的实用性和有效性。这些解决方案通过使用Mathematica软件创建的图形来说明。总的来说,本研究强调了TLARAST在求解涉及多变量的偏微分方程中的实用性和效率。
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引用次数: 0
EDLC performance of ammonium salt-green polymer electrolyte sandwiched in metal-free electrodes 无金属电极夹层中铵盐绿聚合物电解质的EDLC性能
Q1 Mathematics Pub Date : 2023-09-09 DOI: 10.1080/25765299.2023.2256053
Muhamad Hafiz Hamsan, Norhana Abdul Halim, Siti Zulaikha Ngah Demon, Nurul Syahirah Nasuha Sa’aya, Mohd Fakhrul Zamani Kadir, Shujahadeen B. Aziz, Zul Hazrin Zainal Abidin
Microplastic and metal waste from electronic industries are becoming a major threat to the environment and marine ecosystem. Green processing and employing natural derived materials are solutions to this issue. In this work, an electrical double-layer capacitor (EDLC) fabricated from green polymer electrolyte (GPE) sandwiched in between two microbial cellulose-based electrodes is characterized. The eco-friendly electrode films of interconnected cellulose and multiwalled carbon nanotube (MWCNT) are obtained via harmless, inexpensive, and simple procedure. The GPE consists of methylcellulose-potato starch blend as polymer blend and ammonium iodide (NH4I) is chosen as ion provider. Glycerol serves as plasticization agent for alternative pathways enabling ionic migration. The most optimum GPE possesses good ionic conductivity of ∼ 10−3 S/cm. Ions are the dominant charge carrier in the GPE as ion transference number shown to be close to unity. Linear sweep voltammetry (LSV) analysis illustrated that the GPE is electrochemically stable up to 2.4 V. The green EDLC stores energy through non-Faradaic mechanism and the specific capacitance from charge-discharge, Ccd is influenced by the sweep rates. The EDLC can be charged and discharged up to 2 V with a stable 1000 cyclability performance. This work implied the potential of microbial cellulose-based EDLC as ideal green-based energy storage device for low voltage applications such as smart electronic textiles.
来自电子工业的微塑料和金属废物正在成为对环境和海洋生态系统的主要威胁。绿色加工和采用天然衍生材料是解决这一问题的办法。在这项工作中,将绿色聚合物电解质(GPE)夹在两个微生物纤维素基电极之间制成电双层电容器(EDLC)。采用无害、廉价、简单的方法制备了纤维素与多壁碳纳米管(MWCNT)相互连接的环保电极膜。GPE采用甲基纤维素-马铃薯淀粉共混聚合物,碘化铵(NH4I)为离子供体。甘油作为增塑剂,使离子迁移的替代途径。最佳GPE具有良好的离子电导率,为~ 10−3 S/cm。离子是GPE的主要载流子,离子转移数接近于1。线性扫描伏安(LSV)分析表明,GPE在2.4 V以下具有良好的电化学稳定性。绿色EDLC通过非法拉第机制储存能量,其充放电比电容受扫描速率的影响。EDLC可以充电和放电高达2v,具有稳定的1000循环性能。这项工作暗示了微生物纤维素基EDLC作为低压应用(如智能电子纺织品)理想的绿色储能装置的潜力。
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引用次数: 1
An investigation of two integro-differential KP hierarchy equations to find out closed form solitons in mathematical physics 数学物理中两个求闭型孤子的积分-微分KP层次方程的研究
Q1 Mathematics Pub Date : 2023-09-09 DOI: 10.1080/25765299.2023.2256049
M. Ashik Iqbal, M. Mamun Miah, Md Mamunur Rasid, Hashim M. Alshehri, M. S. Osman
Nonlinear partial differential equations (NLPDEs) are widely utilized in engineering and physical research to represent many physical processes of naturalistic occurrences. In this paper, we investigate two well-known NLPDEs, namely, the (2 + 1)-dimensional first integro-differential KP hierarchy equation and the (2 + 1)-dimensional second integro-differential KP hierarchy equation, through a well-stable algorithm known as the (G′G′+G+A)-expansion approach for the first time. This algorithm is generally based on the expansion of function method and has the advantage of easy implementation and can provide a reliable solution to any NLPDEs. Employing the algorithm, we have been able to perceive the closed form solitons of the two chosen NLPDEs that physically represent the solitary wave solutions like, singular, singular periodic, bell, and anti-bell-shaped types of solitons. Furthermore, we explore the graphical manifestations of the obtained solutions, which are of the mentioned soliton types. From the findings of our in-depth study, we can state that the acquired solutions for the selected two equations may greatly aid to extracting the associated natural phenomena in mathematical physics such as fluid dynamics and ocean engineering.
非线性偏微分方程(NLPDEs)广泛应用于工程和物理研究中,以表示自然发生的许多物理过程。本文首次利用(G ' G ' +G+ a)-展开方法,研究了(2 + 1)维第一次积分-微分KP层次方程和(2 + 1)维第二次积分-微分KP层次方程这两个已知的NLPDEs。该算法一般基于函数展开法,具有易于实现的优点,可以为任意nlpde提供可靠的解。利用该算法,我们已经能够感知到所选择的两个nlpde的封闭形式孤子,它们在物理上代表孤波解,如奇异,奇异周期,钟形和反钟形孤子类型。此外,我们还探讨了所得到的上述孤子类型解的图形表示形式。从我们深入研究的结果可以看出,所选两个方程的解可以极大地帮助提取数学物理中相关的自然现象,如流体力学和海洋工程。
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引用次数: 3
A novel method has been developed to efficiently recover valuable lead, zinc, and rare earth elements from hazardous waste generated by glass polishing 开发了一种从玻璃抛光产生的危险废物中有效回收有价值的铅、锌和稀土元素的新方法
Q1 Mathematics Pub Date : 2023-09-06 DOI: 10.1080/25765299.2023.2254515
Azza A. Gabr, Mohamed A Ali, A. Orabi, Hiam M. Osman, Salah S. Elyan
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引用次数: 0
A fractional study with Newtonian heating effect on heat absorbing MHD radiative flow of rate type fluid with application of novel hybrid fractional derivative operator 应用新的混合分数阶导数算子对速率型流体吸热MHD辐射流的牛顿加热效应的分数阶研究
Q1 Mathematics Pub Date : 2023-08-30 DOI: 10.1080/25765299.2023.2250063
Aziz Ur Rehman, Song Hua, M. Riaz, J. Awrejcewicz, Xiange Sun
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引用次数: 0
Corrosion mitigation of carbon steel using triazole Mannich base derivatives: Correlation of electrochemical studies with quantum chemical calculations 使用三唑曼尼希碱衍生物减轻碳钢的腐蚀:电化学研究与量子化学计算的相关性
Q1 Mathematics Pub Date : 2023-08-28 DOI: 10.1080/25765299.2023.2249227
N. Swathi, S. Samshuddin, T. Aljohani, K. Rasheeda, V. D. Alva, I. Baig, M. Aljohani, A. Alamri
{"title":"Corrosion mitigation of carbon steel using triazole Mannich base derivatives: Correlation of electrochemical studies with quantum chemical calculations","authors":"N. Swathi, S. Samshuddin, T. Aljohani, K. Rasheeda, V. D. Alva, I. Baig, M. Aljohani, A. Alamri","doi":"10.1080/25765299.2023.2249227","DOIUrl":"https://doi.org/10.1080/25765299.2023.2249227","url":null,"abstract":"","PeriodicalId":37239,"journal":{"name":"Arab Journal of Basic and Applied Sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45194922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-integral representations for Jacobi functions of the first and second kind 雅可比第一和第二类函数的多积分表示法
Q1 Mathematics Pub Date : 2023-08-25 DOI: 10.1080/25765299.2023.2268911
H. Cohl, R. S. Costas-Santos
Abstract One may consider the generalization of Jacobi polynomials and the Jacobi function of the second kind to a general function where the degree is allowed to be a complex number instead of a non-negative integer. These functions are referred to as Jacobi functions. In a similar fashion as associated Legendre functions, these break into two categories, functions which are analytically continued from the real line segment (−1,1) and those analytically continued from the real ray (1,∞). Using properties of Gauss hypergeometric functions, we derive multi-derivative and multi-integral representations for the Jacobi functions of the first and second kind.
摘要 我们可以考虑把雅可比多项式和雅可比第二类函数推广到允许度数为复数而不是非负整数的一般函数。这些函数被称为雅可比函数。与相关的 Legendre 函数类似,这些函数分为两类:从实线段(-1,1)分析延续的函数和从实线(1,∞)分析延续的函数。利用高斯超几何函数的性质,我们导出了雅可比第一和第二类函数的多衍生和多积分表示。
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引用次数: 0
Determination of eicosapentaenoic acid and docosahexaenoic acid contents and the oxidation level of fish oil supplements from Bahrain market 巴林市场鱼油补充剂二十碳五烯酸和二十二碳六烯酸含量及氧化水平的测定
Q1 Mathematics Pub Date : 2023-08-23 DOI: 10.1080/25765299.2023.2249318
Hawra Abdulhussain, Aysha Khonji, Ayla Alsaloom, Hawra Meshaima, Latifa AlKooheji, Mohammed Aldoseri, M. Al-Mannai, A. Freije
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引用次数: 0
期刊
Arab Journal of Basic and Applied Sciences
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