Arabian Journal for Science and Engineering最新文献_第10页

Synthetic Studies of Aluminum-Doped Zn0.5Mn0.5AlxFe2−xO4 Ferrite for Photocatalytic Degradation of Atrazine Under Visible Light 掺铝 Zn0.5Mn0.5AlxFe2-xO4 铁氧体在可见光下光催化降解阿特拉津的合成研究

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-12 DOI: 10.1007/s13369-024-09442-3

Muhammad Yasar, Khalid Javed

{"title":"Synthetic Studies of Aluminum-Doped Zn0.5Mn0.5AlxFe2−xO4 Ferrite for Photocatalytic Degradation of Atrazine Under Visible Light","authors":"Muhammad Yasar, Khalid Javed","doi":"10.1007/s13369-024-09442-3","DOIUrl":"https://doi.org/10.1007/s13369-024-09442-3","url":null,"abstract":"The objective of this study was to synthesize and evaluate aluminum-doped zinc-manganese ferrite (Zn0.5Mn0.5AlxFe2−xO4 (X = 0, 0.2)) nanoparticles as efficient visible-light-driven photocatalysts for atrazine degradation in water. The nanoparticles were synthesized via the sol–gel method and characterized using XRD, FTIR, SEM–EDX, BET, UV–Vis DRS, and electrical resistivity measurements. Aluminum doping decreased the bandgap from 2.4 to 2.0 eV and improved the adsorption properties by increasing the surface area and pore volume compared to undoped Zn0.5Mn0.5Fe2O4. Photodegradation experiments revealed that Zn0.5Mn0.5Al0.2Fe1.8O4 achieved 95% atrazine removal in 150 min under visible-light irradiation, outperforming the 75.45% removal achieved by undoped Zn0.5Mn0.5Fe2O4. This enhanced performance was attributed to aluminum-induced structural modifications that facilitated charge-separation and radical generation. The degradation followed first-order kinetics and hydroxyl radicals were identified as the primary reactive species. The effects of operational parameters, including the solution pH, atrazine concentration, catalyst dosage, temperature, light intensity, and H2O2 addition, were systematically investigated. Zn0.5Mn0.5Al0.2Fe1.8O4 demonstrated reusability over five consecutive cycles with a slight decrease in efficiency. These findings highlight the potential of aluminum-doped zinc-manganese ferrites as efficient visible-light photocatalysts for environmental remediation.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"27 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational Study of the Piezoelectric Performance of Barium Titanate Crystals in the Presence of Vacancy Defect: Molecular Dynamics Approach 存在空位缺陷时钛酸钡晶体压电性能的计算研究：分子动力学方法

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-12 DOI: 10.1007/s13369-024-09424-5

S. Esmaeili, M. H. Ehsani, Davood Toghraie, S. Saber-Samandari

{"title":"Computational Study of the Piezoelectric Performance of Barium Titanate Crystals in the Presence of Vacancy Defect: Molecular Dynamics Approach","authors":"S. Esmaeili, M. H. Ehsani, Davood Toghraie, S. Saber-Samandari","doi":"10.1007/s13369-024-09424-5","DOIUrl":"https://doi.org/10.1007/s13369-024-09424-5","url":null,"abstract":"Certain materials (ceramics and polymers) are capable of converting mechanical energy into electrical energy via the piezoelectric effect. The piezoelectric effect is fundamentally associated with momentary electric dipoles that occur in solids. The external surface may be borne directly by molecular groups or excited in the crystal lattice by an asymmetric peripheral charge. Using molecular dynamics simulation, the current study examined the effect of atomic vacancies on the piezoelectric properties of barium titanate crystals. For this reason, the diffusion coefficient, ferroelectric hysteresis loop, piezoelectric hysteresis loop, and strain–polarization curve were all examined. Increasing atomic vacancy to 20% increased the maximum (Max) value of residual strain and polarization in the simulated structure, according to the results. Optimal orientation, appropriate displacement of charged atoms, and the formation of effective dipoles all contributed to this. Consequently, the ferroelectric and piezoelectric properties of the structure were enhanced. In the sample containing 20% atomic vacancies, atomic movement was also extremely high. As opposed to the sample containing 30% atomic vacancy, however, its structure was less porous. Hence, when 20% atomic vacancy was present, the structure exhibited its most optimal polarization.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"25 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of an Inline Mixer to Produce Surfactant-Free Biodiesel-diesel/Water Emulsion Fuel: An Analysis of Water Droplets Characteristics and Drive Cycle Emissions 应用内联混合器生产不含表面活性剂的生物柴油-柴油/水乳化燃料：水滴特性和驱动循环排放分析

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-11 DOI: 10.1007/s13369-024-09408-5

Mohamad Qayyum Mohd Tamam, Wira Jazair Yahya, Hasbullah Abdul Rahman, Ahmad Muhsin Ithnin, Hasannuddin Abd Kadir, Md Mujibur Rahman, Hirofumi Noge, Tsuyoshi Koga, Dhani Avianto Sugeng

{"title":"Application of an Inline Mixer to Produce Surfactant-Free Biodiesel-diesel/Water Emulsion Fuel: An Analysis of Water Droplets Characteristics and Drive Cycle Emissions","authors":"Mohamad Qayyum Mohd Tamam, Wira Jazair Yahya, Hasbullah Abdul Rahman, Ahmad Muhsin Ithnin, Hasannuddin Abd Kadir, Md Mujibur Rahman, Hirofumi Noge, Tsuyoshi Koga, Dhani Avianto Sugeng","doi":"10.1007/s13369-024-09408-5","DOIUrl":"https://doi.org/10.1007/s13369-024-09408-5","url":null,"abstract":"Water-in-diesel (W/D) emulsion is a promising alternative fuel candidate, as it can simultaneously reduce nitrogen oxides (NOx) and particulate matter (PM) while improving engine performance. Wide scale adoption of this fuel is difficult due to high production and storage costs. Hence, Real-Time Non-Surfactant Emulsion Fuel Supply System (RTES) is a proposed technology to solve these issues by mixing diesel and water in-line directly to the engine. This study presents an updated RTES prototype which incorporated a modular design, with a feedback system to control water injection rate. In this paper, RTES was installed to a common rail injection diesel-powered vehicle and the biodiesel-diesel W/D produced by RTES was analyzed to determine the effect of common rail pressure toward water droplet size and distribution. The vehicle was then tested under the New European Driving Cycle (NEDC) to evaluate vehicle emissions, which will serve as the basis for evaluating the emissions profile of W/D produced by RTES under urban and extra-urban driving conditions. It was found that when subjected to high common rail pressures, W/D droplets produced by RTES reduced by 21.1% compared to freshly produced W/D. NEDC emissions data revealed that NOx emission was reduced to a maximum of 25.3% in urban driving conditions. Hydrocarbons and carbon monoxide increased marginally throughout urban driving phase; while, carbon dioxide emissions were comparable between biodiesel-diesel and W/D. However, extra-urban driving conditions were unfavorable for RTES activation, as substantial emission increases were observed during high-speed accelerations. Nonetheless, W/D reduced PM emissions by 51% throughout NEDC.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"38 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Aggregate Characteristics and Distribution on the Mechanical Characteristics of Recycled Concrete 骨料特性和分布对再生混凝土机械特性的影响

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-11 DOI: 10.1007/s13369-024-09395-7

Lixia Guo, Yuqing Yang, Ling Zhong, Jianwei Zhang

{"title":"Effect of Aggregate Characteristics and Distribution on the Mechanical Characteristics of Recycled Concrete","authors":"Lixia Guo, Yuqing Yang, Ling Zhong, Jianwei Zhang","doi":"10.1007/s13369-024-09395-7","DOIUrl":"https://doi.org/10.1007/s13369-024-09395-7","url":null,"abstract":"Recycled concrete is a green material composed of natural aggregate and recycled aggregate mixed with cementing material and water in a certain ratio. The random distribution of aggregate in concrete has a great impact on material properties due to its supporting effect. In order to explore the characteristics of aggregate and the influence of its random distribution on the compressive strength performance of recycled aggregate concrete, numerical simulation is adopted in this paper. By using RAND function in ANSYS software APDL, a five-phase random aggregate model of recycled aggregate concrete was generated based on Monte Carlo method, and numerical simulation of uniaxial compression mechanical properties of concrete specimens under different recycled aggregate substitution rates (0%, 35% and 100%) was carried out. On the basis of reliability of the numerical simulation method verified by laboratory tests, multiple groups of stress–strain characteristic curves were obtained, the failure characteristics and stress characteristics of recycled concrete were analyzed, and Weibull probability statistical distribution was introduced to characterize the randomness and heterogeneity of mechanical characteristic parameters of recycled aggregate concrete. The results show that the compressive strength of recycled aggregate concrete is subject to Weibull distribution under random distribution of aggregate, and the shape coefficient m in Weibull distribution parameter can characterize the randomness and complexity of the failure of recycled concrete. The dispersion of the compressive strength of recycled aggregate concrete shows a decreasing trend with the increase in the substitution rate of recycled aggregate.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"193 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Feature Representation for Multimodal Fake News Detection Using Localized Fine-Tuning of Improved BERT and VGG-19 Models 利用改进型 BERT 和 VGG-19 模型的局部微调增强多模态假新闻检测的特征表示

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-07 DOI: 10.1007/s13369-024-09354-2

Suhaib Kh. Hamed, Mohd Juzaiddin Ab Aziz, Mohd Ridzwan Yaakub

{"title":"Enhanced Feature Representation for Multimodal Fake News Detection Using Localized Fine-Tuning of Improved BERT and VGG-19 Models","authors":"Suhaib Kh. Hamed, Mohd Juzaiddin Ab Aziz, Mohd Ridzwan Yaakub","doi":"10.1007/s13369-024-09354-2","DOIUrl":"https://doi.org/10.1007/s13369-024-09354-2","url":null,"abstract":"The spread of fake news poses significant challenges across various sectors, including health, the economy, politics, and national stability. Social media and modern technology have facilitated the rapid dissemination of fake news, predominantly in multimedia formats. Despite advancements, multimodal fake news detection models struggle to achieve optimal accuracy, primarily due to the quality of feature representation. This study aims to enhance feature representation to improve fake news identification. Pre-trained models for feature extraction, typically designed for general public domains, may not suit the specific characteristics of our task using the Fakeddit dataset. We propose a localized fine-tuning strategy, refining pre-trained BERT and VGG-19 models for accurate multimodal feature representation in fake news detection. BERT was fine-tuned by retraining all layers, while only the last block of VGG-19 was fine-tuned. To further enhance the representations, we made structural modifications to VGG-19, including the use of a global average pooling layer and a redesigned classifier. This approach significantly improved our multimodal fake news detection model’s performance, achieving a high accuracy of 92%. Compared to state-of-the-art studies that use generic pre-trained models, our model demonstrates superior performance. Our research underscores the importance of feature representation in multimodal contexts and opens avenues for exploring the synergy between textual and visual modalities in fake news detection.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"47 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biopolymer and Gypsum Added Na Bentonite for a More Effective Clay Liner 添加生物聚合物和石膏的钠基膨润土可制成更有效的粘土衬里

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-07 DOI: 10.1007/s13369-024-09386-8

Ali Hossien Basheer Garoushi, Eris Uygar

{"title":"Biopolymer and Gypsum Added Na Bentonite for a More Effective Clay Liner","authors":"Ali Hossien Basheer Garoushi, Eris Uygar","doi":"10.1007/s13369-024-09386-8","DOIUrl":"https://doi.org/10.1007/s13369-024-09386-8","url":null,"abstract":"Bentonite soil is frequently utilized as a compacted clay liner, which is a critical component of municipal waste landfill systems. This study aims to investigate the feasibility of treating sodium bentonite (NAB) with natural biopolymers to obtain an effective clay liner. The NAB was treated with three biopolymers: sodium alginate (SA), agar gum (A), and xanthan gum (X), at different replacement percentages (2%, 4%, 6%, and 8%). Additionally, an investigation was conducted to determine the extent to which replacing 50% of these additives with gypsum (G) would improve the biopolymer treatments. Fourier-transform infrared spectroscopy (FTIR), pH, one-dimensional swelling, and unconfined compressive strength (UCS) were carried out in this study. The FTIR results indicated the presence of intermolecular hydrogen bonding when NAB was treated with biopolymers and gypsum, which is crucial for enhancing the UCS. Furthermore, the thermal treatment of biopolymers significantly contributes to improving the UCS. Among the various biopolymers tested, agar gum demonstrated the most significant improvement, specifically, replacing 8% of the NAB with agar gum resulted in a 55% increase in UCS. Volume change behavior was most influenced by replacement of NAB with gypsum by 8%, which reduced the vertical swelling to 21% as opposed to 79% for the untreated NAB. The use of SA conversely resulted in an increased vertical swelling of 91%.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"13 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Frequency Dual-Branch Network for Steel Small Defect Detection 用于钢材小缺陷检测的高频双分支网络

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-07 DOI: 10.1007/s13369-024-09352-4

Chi Ma, Zhigang Li, Yueyuan Xue, Shujie Li, Xiaochuan Sun

{"title":"High-Frequency Dual-Branch Network for Steel Small Defect Detection","authors":"Chi Ma, Zhigang Li, Yueyuan Xue, Shujie Li, Xiaochuan Sun","doi":"10.1007/s13369-024-09352-4","DOIUrl":"https://doi.org/10.1007/s13369-024-09352-4","url":null,"abstract":"Strip surface defect detection is pivotal in the steel industry for improving strip production quality. However, there is still a big gap between the existing working and the detection of small defects in strip steel in practical applications. In this paper, we propose the SSD-YOLO model, which is designed specifically for detecting small defects on strip steel surfaces. Given the challenge of feature extraction due to the small defect size, it utilizes a dual-branch feature extraction and channel-level feature fusion to enhance the expression capability of small defects. Moreover, it integrates a multiscale high-resolution detection module to achieve precise segmentation, thereby improving the overall detection accuracy of the model. The experimental results illustrate that the SSD-YOLO model, as proposed, attains a 98.0% mean average precision (mAP) and operates at 66 frames per second (FPS) when evaluated on the SSDD (Steel Small Defect Dataset). In comparison with YoloV8s, the SSD-YOLO achieves a significant improvement in accuracy, with an increase of 19.9%. The inference time and performance of our SSD-YOLO is well balanced, making it suitable for real-world deployment.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"12 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective Optimal Antiwindup Compensation of Discrete-Time Nonlinear Systems Under Input Saturation 输入饱和状态下离散时间非线性系统的多目标最优防逆风补偿

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-06 DOI: 10.1007/s13369-024-09385-9

Faisal Iqbal, Muhammad Rehan, Muntazir Hussain, Ijaz Ahmed, Muhammad Khalid

{"title":"Multi-objective Optimal Antiwindup Compensation of Discrete-Time Nonlinear Systems Under Input Saturation","authors":"Faisal Iqbal, Muhammad Rehan, Muntazir Hussain, Ijaz Ahmed, Muhammad Khalid","doi":"10.1007/s13369-024-09385-9","DOIUrl":"https://doi.org/10.1007/s13369-024-09385-9","url":null,"abstract":"This paper deals with the discrete-time antiwindup compensator (AWC) synthesis for nonlinear discrete-time systems under input saturation. The proposed method considers the objective of an optimal AWC design for fast convergence and for improved performance against the saturation nonlinearity. A discrete-time full-order AWC architecture is presented for nonlinear discrete-time systems to achieve an improved performance against the saturation nonlinearity. Additionally, an equivalent decoupled AWC architecture for nonlinear discrete-time system is derived through algebraic analysis and transformation of saturation to dead-zone function. To achieve fast convergence, a more generic Lyapunov function has been applied for the AWC design by incorporating an exponential term in the Lyapunov function. Then, new conditions for the AWC synthesis are revealed by application of the resultant decoupled discrete-time architecture, nonlinearity condition, a modified quadratic-exponential Lyapunov function, optimally exponential (L_{2}) approach, and input saturation properties. The design conditions are provided for both global and local design scenarios, which can be applied to both stable and unstable plants. Compared with the conventional methods, the proposed approach deals with nonlinear systems, can be more practical due to discrete-time scenario, provides an optimal design for both fast convergence and performance, and applicable to both stable and unstable plants. A simulation example has been provided to demonstrate the efficacy of the proposed nonlinear AWC design.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"44 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of New Hyper-cross-linked Polymer for Efficient Heavy Metal Adsorption from Industrial Wastewater 制备新型超交联聚合物以高效吸附工业废水中的重金属

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-06 DOI: 10.1007/s13369-024-09259-0

Isham Areej, Saqlain Raza, Amin Abid, Ahmad Kaleem Qureshi, Umer Shafique, Bien Tan

{"title":"Fabrication of New Hyper-cross-linked Polymer for Efficient Heavy Metal Adsorption from Industrial Wastewater","authors":"Isham Areej, Saqlain Raza, Amin Abid, Ahmad Kaleem Qureshi, Umer Shafique, Bien Tan","doi":"10.1007/s13369-024-09259-0","DOIUrl":"https://doi.org/10.1007/s13369-024-09259-0","url":null,"abstract":"Water pollution is the emerging issue in modern world that may cause water scarcity for our future generations. Therefore, it is ultimate need to develop highly efficient and cost-effective methods to solve this issue. Due to this intense demand, a new hyper-cross-linked polymer (HCP) of resorcinol (1, 3-dihydroxybenzol) “R-HCP” is synthesized using Friedel–Craft reaction for the removal of cadmium metal ions from industrial wastewater. Real industrial wastewater samples are used to evaluate the adsorption capability of R-HCP. Fabricated R-HCP is characterized through Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), EDX (energy-dispersive X-ray spectroscopy) and BET (Brunauer–Emmett–Teller). The BET surface area of R-HCP is 221.5848 m2g−1. Through salt addition method, the point of zero charge (PZC) was also determined, and its value is 2.0 pH. The maximum adsorption capacity of R-HCP is 10 mg/g for cadmium metal ions. The greatest adsorption value of 93% was obtained at pH 10 with 0.5 g of adsorbent and 9-min contact time and favors exothermic reaction. Langmuir, Freundlich and Temkin isotherms were studied, and results shows that Freundlich model is the best fit with R2 value of 0.9917. Adsorption kinetic investigation shows that it follows pseudo-first-order kinetic model R2 value 0.9874. The study of the effect of interfering ions including calcium, magnesium, sodium and potassium demonstrates the decrease in the adsorption capacity to a little extent. R-HCP can be recycled and have regeneration capacity, which is novel and distinguished feature of this adsorbent.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"3 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the Dewatering Process with Geotextile Tubes by Sedimentation, One- and Two-Dimensional Filtration Test Methods 通过沉淀、一维和二维过滤试验方法研究土工织物管的脱水过程

IF 2.9 4区综合性期刊

Arabian Journal for Science and Engineering Pub Date : 2024-08-06 DOI: 10.1007/s13369-024-09323-9

Abdulkadir Bulut, Tayfun Sengul

{"title":"Investigation of the Dewatering Process with Geotextile Tubes by Sedimentation, One- and Two-Dimensional Filtration Test Methods","authors":"Abdulkadir Bulut, Tayfun Sengul","doi":"10.1007/s13369-024-09323-9","DOIUrl":"https://doi.org/10.1007/s13369-024-09323-9","url":null,"abstract":"Dewatering applications are carried out with geotextile tubes for the disposal or reuse of industrial wastes with high water content. Class F Seyitomer thermal power plant fly ash, an industrial waste, was selected in this study. Turbidity, sedimentation and filtration experiments were carried out using anionic and cationic polymers and polypropylene synthetic fiber to investigate the effect of polymers and fibers on the dewatering of fly ash. The use of polymers was determined to significantly accelerate filtration and soil sedimentation speed while leading to a slight increase in the volume of the filter cake. When effective polymer and dosage are used, slurry filtration time can be reduced up to one-eighth of the time and dewatering can be achieved much faster. The addition of synthetic fiber accelerated the sedimentation of the slurry and increased the filtration in the vertical direction, while it did not show a significant effect on the total filtration in two-dimensional filtration. In geotextile tube applications, although one-dimensional filtration experiments might give misleading results in terms of estimating the effectiveness of the polymers used in solid–liquid separation and dewatering times, the jar test, sedimentation and two-dimensional filtration experiments were determined to give compatible and more realistic results. In two-dimensional filtration experiments, approximately 75% of the filtration occurred in the radial direction and the dewatering time was approximately 21–55% of the time estimated by one-dimensional filtration experiment. Geotextile tube dewatering design can be made more predictable and cost-effective in the field by performing small-scale laboratory experiments with the two-dimensional filtration test system designed for this study and various dewatering applications.","PeriodicalId":8109,"journal":{"name":"Arabian Journal for Science and Engineering","volume":"85 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0