Gyan Vihar University

Amine-functionalized copper(ii)-based MOF-14 materials were prepared via post-synthetic modification using ethylenediamine (en), diethylenetriamine (deta), and 1,2-bis(3-aminopropylamino)ethane (bape) at varying incorporation levels. Comprehensive structural, morphological, textural, and thermal analyses verified the successful grafting of amine functionalities while maintaining the integrity of the parent framework. CO2 adsorption studies at 0 degrees C demonstrated that en- and deta-modified MOF-14 exhibited optimal uptake at loadings of 10-15 wt%, achieving a balance between enhanced chemisorption sites and accessible pore volume, whereas the larger bape ligand led to substantial pore obstruction. Additional adsorption measurements at 25 degrees C confirmed measurable CO2 uptake under conditions closer to practical gas separation processes. Furthermore, evaluation of CO2/N2 separation performance, including IAST calculations for a 15% CO2/85% N2 mixture, revealed substantially enhanced selectivity in the amine-modified frameworks compared to pristine MOF-14. Electrochemical evaluation revealed the excellent energy storage performance of MOF-14 (en) 20%, delivering a high specific capacitance of 972 F g-1, markedly outperforming the pristine material. This study highlights the dual capability of amine-modified MOF-14, presenting efficient low-pressure CO2 capture alongside outstanding promise as an electrode material for high-performance supercapacitors.

A solution to the environmental issues is the valorisation of the agro-industrial residues as an association is made between the waste management and the resource recovery. Spent coffee grounds (SCG) have received special concern as a potentially good source of adsorbent, because of their comparably large supply, naturally formed carbon based, and desirable surface performance. However, the low porosity, surface area, adsorption capacity and functional groups such as including hydroxyl (–OH), carboxyl (–COOH), and carboxyl (C=O) do not allow the direct utilization of Spent coffee grounds. In order to address these limitations, chemical activation through pre and post treatment techniques with chemical activating reagents such as alkaline, acidic, metal oxide, and carbonate (H3PO4, KOH, K2CO3, Fe2O3, ZnO, MgCO3) have been studied to improve structural and chemical properties of spent coffee grounds. The results from the mechanism of activations have been elaborated in present study in concern with enhanced surface area, formation of clear and distinct microporous and mesoporous pore structures, functional group modification (such as forming P4O10, and forming alcohol, hydroxyl, saturated hydrocarbon, unsaturated hydrocarbon, aromatic ring and ether groups) are improvement in the result among adsorption capacity. This paper has focused on the activation techniques of SCG using different activating agents and their influence on the development of the pore, surface modification, and adsorption capability for different types of pollutant in waste water.

This article's objective is to solve and analyse the time fractional form of a Fokker Planck equation using two techniques that are renowned for their effectiveness, precision, ease of use and computation, and adaptability: the Homotopy Perturbation Method and the Aboodh Residual Power Series Method. These techniques are well-known for their resilience when solving complicated issues, and they are especially well-suited for handling fractional differential equations. For the analysis of more complex nonlinear differential equations, the two suggested approaches-the Homotopy Perturbation Method and the Aboodh Residual Power Series Method-are very successful mathematical strategies. Beyond the particular equations under study, these techniques can yield accurate approximations of solutions to complex evolution equations. These techniques capture the memory and heredity characteristics present in many physical systems and offer a more realistic depiction of fractional order processes by employing the Caputo derivative.

Mining activities significantly alter environmental conditions by increasing atmospheric aerosol loads and degrading water quality. This study employs Google Earth Engine (GEE) to analyze spatiotemporal anomalies in Aerosol Optical Depth (AOD), PM₂.₅ concentrations, chlorophyll-a levels, and turbidity in Tonk, Rajasthan, between 2016 and 2022. Data from Copernicus Atmosphere Monitoring Service (CAMS) and Landsat 8/9 Surface Reflectance (SR) were used to compute anomalies based on deviations from the 2000–2015 baseline. Results indicate a strong correlation between mining density and AOD (r = 0.82), PM₂.₅ (r = 0.69), chlorophyll-a (r = 0.76), and turbidity (r = 0.88), highlighting significant environmental degradation. Increased AOD and PM₂.₅ values were observed near active mining sites, confirming mining-induced dust emissions. Water quality analysis revealed elevated chlorophyll and turbidity anomalies, likely due to mining runoff, sedimentation, and nutrient enrichment leading to eutrophication. The findings emphasize the need for sustainable mining practices, stricter regulatory measures, and enhanced pollution monitoring to mitigate environmental degradation in the region.

This research evaluates the application of Glass Fiber Reinforced Concrete (GFRC) for improving road pavement durability and sustainability. The primary objective was to ascertain the optimal glass fiber content that enhances pavement performance while maintaining economic feasibility. To achieve this, experimental investigations compared the mechanical properties of GFRC to traditional Portland Cement Concrete (PCC). The experiments focused on key performance metrics such as tensile, compressive, and flexural strengths, with GFRC mixes containing up to 2% glass fiber by volume tested under simulated real-world conditions. The experimental results indicate that GFRC, with 2% glass fiber by volume significantly enhances mechanical properties compared to PCC. Notably, this composition exhibited the highest levels of durability and mechanical strength, demonstrating substantial improvements in resistance to environmental stressors and load-bearing capacity. The study shows that GFRC, particularly with 2% fiber content, offers superior performance, suggesting a shift towards its use in road construction could significantly extend pavement lifespans and reduce maintenance frequency and costs. These findings position GFRC as a viable and advantageous alternative in the construction of more durable and sustainable road infrastructure.