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RISS 인기검색어
- 검색키워드
- 저자 : Riadh Marzouki (검색결과 5 건)
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Liu, Qi,Peng, Kang,Zeng, Jie,Marzouki, Riadh,Majdi, Ali,Jan, Amin,Salameh, Anas A.,Assilzadeh, Hamid Techno-Press 2022 Advances in nano research Vol.12 No.6
Mining of ore minerals (sfalerite, cinnabar, and chalcopyrite) from the old mine has led in significant environmental effects as contamination of soils and plants and acidification of water. Also, nanoparticles (NP) have obtained global importance because of their widespread usage in daily life, unique properties, and rapid development in the field of nanotechnology. Regarding their usage in various fields, it is suggested that soil is the final environmental sink for NPs. Nanoparticles with excessive reactivity and deliverability may be carried out as amendments to enhance soil quality, mitigate soil contaminations, make certain secure land-software of the traditional change substances and enhance soil erosion control. Meanwhile, there's no record on the usage of Nano superior substances for mine soil reclamation. In this study, five soil specimens have been tested at 4 sites inside the region of mine (<100 m) to study zeolites, and iron sulfide nanoparticles. Also, through using Artificial Neural Network (ANN) and Extreme Learning Machine (ELM), this study has tried to appropriately estimate the mechanical properties of soil under the effect of these Nano particles. Considering the RMSE and R2 values, Zeolite Nano materials could enhance the mine soil fine through increasing the clay-silt fractions, increasing the water holding capacity, removing toxins and improving nutrient levels. Also, adding iron sulfide minerals to the soils would possibly exacerbate the soil acidity problems at a mining site.
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Management of the energy harvesting for MEMS/NEMS via newmark current method
Shang, Kun,Shan, Huafeng,Alkhalaf, Salem,Marzouki, Riadh,Khadimallah, Mohamed Amine Techno-Press 2022 Advances in nano research Vol.12 No.6
The free and forced vibration in addition to electric energy harvesting of a piezoelectric disk resting on two-parameter foundation modeled by modified couple stress as well as Kirchhoff plate theory is probed. The governing equations and boundary conditions are obtained using Hamilton's principle. Then, the free and forced vibration are solved using numerical solutions, generalized differential quadrature method (GDQM) and Newmark-beta method. The forced vibration is resulted from a base excitation load. Also, the possible voltage which can be harvested from this system is obtained using generalized integral quadrature method. The validity of the formulation and solution procedure is confirmed using a compassion study. The impact of parameters such as length effect, inner to outer radius ratio, and foundations parameters on the free and forced vibration as well as energy harvesting is investigated in detail. This paper can be a basis for future studies in the area of piezoelectric harvesters in small scales.
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Strength and permeability of fiber-reinforced concrete incorporating waste materials
Xu, Yun,Xu, Yin,Almuaythir, Sultan,Marzouki, Riadh Techno-Press 2022 Advances in concrete construction Vol.13 No.2
Ecological issues such as natural resource reduction and enormous waste disposals are increasingly leading in developing civilization toward sustainable construction. The two primary environmental issues are the depletion of natural resources and the disposal of trash in open landfills. Waste steel fiber (WSF) was investigated for usage as a cement-based concrete (CBC) constituent in this research. Recycling waste fibers both makes cement composites more long and cost-effective, also aids in pollution reduction. The objective of this study is to analyze the impacts of waste fiber on the fresh and mechanical features of concrete using recycled additives. A comparative research on the durability and mechanical qualities of fiber-reinforced concrete (FRC) constructed with natural aggregates was conducted for this aim. The obstacles to successful WSF recycling methods application in the building industry have been investigated, resulting that CBCs with these fibers make an economic and long lasting choice to deal with waste materials. The workability of fiber enhanced concrete was found to be comparable to that of normal concrete. Fibers have a considerable impact on the splitting tensile strength, flexural and compressive strength of recycled concrete. Fiber may enhance the water permeability. When the WSF content is 0.6 kg/m3, the water absorption is nearly half. Fibers would have no effect on its permeability.
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Insight into the corrosion inhibition property of Artocarpus heterophyllus Lam leaves extract
Jiahong He,Qiang Xu,Guoqiang Li,Qiang Li,Riadh Marzouki,Wenpo Li 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-
In this work, the method (water extraction way) was uesd to acquire Artocarpus heterophyllus Lamleaves extract (AHLLE). We refer to the relevant references on the composition of Artocarpus heterophyllusLam leaves and perform Fourier infrared spectroscopy analysis for AHLLE. It can be concluded thatAHLLE contains 2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-4H-chromen-4-one (DPD), (2R,3R)-2-(2,4-dihydroxyphenyl)-3 ,5,7-trihydroxychroman-4-one (DPT), 3-(4-hydroxyphenyl)acrylic acid (HPT), and5-(6-hydroxybenzofuran-2-yl)benzene-1,3-diol (HBB). Quantum chemical calculations (QCC) data andmolecular dynamics (MD) simulations results show that DPD, DPT, HPT, and HBB all have the potentialof excellent corrosion inhibitors. Scanning electron microscope (SEM) results and atomic force microscope(AFM) test results show that after adding AHLLE to H2SO4 environment, the copper surface is stillcorrespondingly flat. In addition, the results of electrochemical experiments indicate that the AHLLE is500 ppm, the anti-corrosion efficiency obtained from electrochemical impedance spectroscopy datacan reach 97.3%. With the temperature augments to 313 K, the corrosion inhibition nature of AHLLEcan still be maintained to 97%. AHLLE is adsorbed onto the Cu surface and belongs to Langmuir monolayeradsorption.
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Yang Zhou,Chong Zhu,Shenying Xu,Bin Xiang,Riadh Marzouki 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-
The anti-corrosion ability of Syzygium samarangense leaf extract (SSLE) was studied using electrochemicalways, topography research and theoretical calculations. The results of electrochemical tests indicatedthat SSLE can effectually control the Q235 steel corrosion in sulfuric acid environment. When the concentrationof SSLE was 400 mg/L, its anti-corrosion ability can be close to 90%. SSLE can efficaciously restrictthe cathodic and anodic reactions, and can still emerge high corrosion inhibition character at a certaintemperatures scope. The surface morphology test shows that the Q235 steel becomes smooth and brightafter adding SSLE. Theoretical calculation data indicated that SSLE can manifest high corrosion inhibitionperformance. The adsorption of SSLE at the solution/surfaces of steel accords with the Langmuir adsorptionmodel.
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