Physical characterization and radiation shielding features of B2O3-As2O3 glass ceramic

Mohamed Y. Hanfi,Ahmed K. Sakr,A.M. Ismail,Bahig M. Atia,Mohammed S. Alqahtani,K.A. Mahmoud 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.1

The synthetic B2O3eAs2O3 glass ceramic are prepared to investigate the physical properties and the radiation shielding capabilities with the variation of concentration of the As2O3 with 10, 20, 30, and 40%, respectively. XRD analyses are performed on the fabricated glasseceramic and depicted the improvement of crystallinity by adding As2O3. The radiation shielding properties are studied for the B2O3eAs2O3 glass ceramic. The values of linear attenuation coefficient (LAC) are varied with the variation of incident photon gamma energy (23.1e103 keV). The LAC values enhanced from 12.19 cm1e37.75 cm1 by raising the As2O3 concentration from 10 to 40 mol% at low gamma energy (23.1 keV) for BAs10 and BAs40, respectively. Among the shielding parameters, the halfevalue layer, transmission factor, and radiation protection efficiency are estimated. Furthermore, the fabricated samples of glass ceramic have low manufacturing costs and good shielding features compared to the previous work. It can be concluded the B2O3eAs2O3 glass ceramic is appropriate to apply in X-ray or low-energy gamma-ray shielding applications.

The radiation shielding competence and imaging spectroscopic based studies of Iron ore region of Kozhikode district, Kerala

S. Arivazhagan,K.A. Naseer,K.A. Mahmoud,S.A. Bassam,P.N. Naseef Mohammed,N.K. Libeesh,A.S. Sachana,M.I. Sayyed,Mohammed S. Alqahtani,E. El Shiekh,Mayeen Uddin Khandaker Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.7

Hyperspectral data and its ability to explore the minerals and their associated rocks have a remarkable application in mineral exploration and lithological characterization. The present study aims to explore the radiation shielding aspects of the iron ore in Kerala with the aid of the Hyperion hyperspectral dataset. The reflectance-spectra obtained from the laboratory conditions as well as from the image show various absorptions. The results from the spectra are validated with geochemical data and GPS points. The Monte Carlo simulation employed to evaluate the radiation shielding ability. Raising the oxygen ions caused a noteworthy decrease in the µ values of the studied rocks which is accompanied by an increase in Δ_0.5 and Δ_eq values. The Δ_0.5 and Δ_eq values increased by factors of approximately 77 % with raising the oxygen ions between 44.32 and 47.57 wt.%. The µ values varies with the oxygen concentrations, where the µ values decreased from 2.531 to 0.925 cm^-1 (at 0.059 MeV), from 0.381to 0.215 cm^-1 (at 0.662 MeV), and from 0.279 to 0.158 cm^-1 (at 1.25 MeV) with raising the oxygen ions from 44.32 to 47.43 wt.%.

The radiation shielding proficiency and hyperspectral-based spatial distribution of lateritic terrain mapping in Irikkur block, Kannur, Kerala

Arivazhagan S.,Naseer K.A.,Mahmoud K.A.,Libeesh N.K.,Arun Kumar K.V.,Naga Kumar K.ChV.,Sayyed M.I.,Alqahtani Mohammed S.,Shiekh E. El,Khandaker Mayeen Uddin 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.9

The practice of identifying the potential zones for mineral exploration in a speedy and low-cost method includes the use of satellite imagery analysis as a part of remote sensing techniques. It is challenging to explore the iron mineralization of a region through conventional methods which are a time-consuming process. The current study utilizes the Hyperion satellite imagery for mapping the iron mineralization and associated geological features in the Irikkur region, Kannur, Kerala. Along with the remote sensing results, the field study and laboratory-based analysis were conducted to retrieve the ground truth point and geochemical proportion to verify the iron ore mineralization. The MC simulation showed for shielding properties indicate an increase in the linear attenuation coefficient with raising the Fe2O3þSiO2 concentrations in the investigated rocks where it is varied at 0.662 MeV in the range 0.190 cm1 - 0.222 cm1 with rising the Fe2O3þSiO2 content from 57.86 wt% to 71.15 wt%. The analysis also revealed that when the g-ray energy increased from 0.221 MeV to 2.506 MeV, sample 1 had the largest linear attenuation coefficient, ranging from 9.33 cm1 to 0.12 cm1 . Charnockite rocks were found to have exceptional shielding qualities, making them an excellent natural choice for radiation shielding applications.

Assessment of Sustainable Green Lightweight Concrete Incorporated in New Construction Technologies

Fahad K. Alqahtani,Mohamed A. Sherif,Amr M. Ghanem,Ibrahim S. Abotaleb 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.12

Recent studies have led to the development of approaches for recycling plastic waste and using it as an alternative for natural aggregates in concrete. The studies mainly focused on the material properties and sustainability aspects of such implementation, with little focus on the financial implications and the technical feasibility. The purpose of this research is to investigate the different lifecycle costs associated with the use of green recycled plastic lightweight aggregates (GLACs) in concrete construction in different structural systems. For that purpose, the authors evaluated a concrete structure with several variable design systems and conducted structural design once using conventional concrete and once using concrete with recycled plastic aggregates, resulting in a total of 36 distinct scenarios. The lifetime cost analysis was performed on such scenarios. Finally, a sensitivity analysis was carried out to determine how structural characteristics and critical element costs influence cost-effectiveness. According to the findings, this approach can save up to 6% in life-cycle expenses. The findings of this research will contribute to the upcoming paradigm shift of using recycled plastic in concrete, which will reduce the environmental impacts of both the concrete and plastic industries while also assisting developers in lowering their life cycle costs.

Spectroscopic and cloud point studies of the interaction and thermodynamics of ciprofloxacin hydrochloride+surfactants mixture in different solvents: Effect of temperature and composition

Md. Anamul Hoque,Md. Mofaqkharur Rahman,Shamim Mahbub,Mezbah Hossain,Mohammed Abdullah Khan,Md. Ruhul Amin,Ali S. Alqahtani,Mohammad Z. Ahmed,Mohammed S. Alqahtani,Omar M. Almarfadi 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.7

Surfactant is one of the most important chemical entities in drug formulation which can bind with drug molecules. Herein, the binding interaction of ciprofloxacin hydrochloride (CFH) drug with two different surfactants (sodium dodecyl sulfate (SDS) and Triton X-100 (TX-100)) has been investigated through UV-Visible spectroscopic and cloud point measurement techniques at different conditions. The absorption spectrum of CFH was found to be dependent on presence of additives/temperature change. The binding constant (Kb) of CFH+SDS/CFH+TX-100 was found to be increased primarily, reached a maximum value and then decreased with the increase of temperature, except in water medium (pH=2.0) and 30% (v/v) methanol. The Kb values for CFH+SDS were found to be higher in the aqueous medium than almost all medium studied herein, while better binding was observed in the alcoholic medium in the case of the CFH+TX-100 system. The Gibbs free energy of binding (Gb o) for both CFH+SDS and CFH+TX- 100 systems were attained negative in each case studied, inferring the spontaneous binding phenomenon. The cloud point (CP) value of CFH+TX-100 mixture was lessened in ZnSO4·7H2O solution and the CP values exhibited a gradual reduction through the upsurge of electrolyte concentration. The positive values of the Gibbs free energy of clouding indicated the nonspontaneous clouding phenomena. To disclose the interaction between drug and surfactant, other thermodynamic parameters, e.g., enthalpy (Hb o) and entropy (Sb o), different transfer energies as well as entropyenthalpy compensation parameters of binding/clouding were evaluated and clarified with proper explanation.

Efficient electrochemical detection of L-lactic acid using platinum nanoparticle decorated Chitosan/ZnTiO3 nanocomposites

M. Faisal,M.M. Alam,Jahir Ahmed,Abdullah M. Asiri,S.A. Alsareii,Raja Saad Alruwais,Norah Faihan Alqahtani,Mohammed M. Rahman,Farid A. Harraz 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-

Herein, a facile L-lactic acid electrochemical sensor based on Pt-nanoparticles (NPs)@Chitosan/ZnTiO3nanocomposites (NCs) coated on a glassy carbon electrode (GCE) is demonstrated. Ultra-sonicationmethod followed by irradiation using an Osram Hg-lamp was applied to prepare Pt-NPs@Chitosan/ZnTiO3 NCs, and the characterization of prepared NCs was executed by Field Emission ScanningElectron Microscopy FESEM, Energy Dispersive Spectroscopy EDS, Transmission Electron MicroscopyTEM, High Resolution Transmission Electron Microscopy HRTEM, Fourier Transform InfraredSpectroscopy FTIR, Ultraviolet–visible spectroscopy UV–vis., and X ray Diffraction XRD analysis. A linearcurrent versus potential responses relation was obtained in a concentration range of L-lactic acid of 0. 30 2.40 mM at differential pulse voltammetric (DPV) analysis in a pH 7.0 buffer medium and resultedconcentration range was defined as the dynamic detection range (LDR) for L-lactic acid analysis. The Llacticacid sensor sensitivity (0.4529 lAlM-1cm2), limit of detection (LOD; 22.36 ± 1.12 lM), and limitof quantification (LOQ; 79.88 lM) were obtained. Besides this, the sensor reproducibility and responsetime were found to be reliable. Finally, the assembled sensor probe was validated by the testing of realsamples, which exhibited acceptable and satisfied results. It is introduced a new route for the detection ofchemicals using novel nanocomposite materials by electrochemical approach for the safety of healthcarefields in a broad scales.