National conference on Recent Trend interdisciplinary in Science

Performance Evaluation of Cashew Nutshell Ash Aiming Their Use in Cement Composites
Sanaboina Nagarajua , Dr. R. Sudhab, Dr.S.Durgalakshmic
aResearch Scholar, Department of Chemistry,School of Basic sciences, (VISTAS), Pallavaram, Ch 17 bDepartment of Chemistry, School of Basic sciences, (VISTAS), Pallavaram, Chennai 17 cDepartment of Civil Engineering, School of Engineering, (VISTAS), Pallavaram, Chennai 17
Every year, the agro-industrial sector generates a lot of waste by-products that, due to poor management and a lack of awareness of their values, present risks to the environment, society,and economy. One of the promising substitute materials for cement that can be used in the construction industry is cashew nut shell waste. Thus, the ash from cashew nutshell was investigated in this work. Since they are a byproduct of the energy generation process, ashes maintain a significant position among the agro-industrial wastes. Because most ashes include pozzolanic activity, they can be utilized in place of cement to create low-cost composites withless energy waste. The current study uses Thermogravimetric analysis (TGA), and differential thermogravimetric analysis (DTGA), X-Ray Fluorescence Analysis (XRF) and X-Ray diffraction (XRD). It is concluded that using CNSAin concrete is beneficial in reducing environmental and sustainability issues. CNSA concrete is advantageous in environments with high sulfate concentration. It was found that the total amount of silicon oxide (SiO2), aluminum oxide (Al2O3), and iron oxide (Fe2O3) obtained in CNSA. An amorphous structure is indicated by the broadened peak that occurs in the XRD pattern at about . Increasing the activation temperature tends to cause the activated carbon to graphitize. Chemical testing revealed a low silicon (SiO2) content, and the analysis of the CNSA-soluble extract revealed the presence of heavy metals.
Keywords: Cashew nut ashes; Agroindustrial waste; X-Ray diffraction; X-Ray Fluorescence Analysis; Thermogravimetric analysis

Comparative Study on Green Synthesis, Characterization, and Biological Applications of Cerium Oxide Nanoparticles Using Artabotrys hexapetalus, Justicia adhatoda, Gloriosa superba, and Murraya koenigii Leaf Extracts.
Shamsudheen.Va M.Priyaa*
aResearch Scholar, Department of Chemistry ,V ISTAS, Pallavaram, Chennai
a*Assistant professor , Department of Chemistry School of basic science, VISTAS. Chennai-India

physicochemical properties, including high redox activity, oxygen storage capacity, and biocompatibility. Green synthesis methods utilizing plant leaf extracts offer an eco-friendly, cost-effective alternative to traditional chemical approaches, minimizing toxic byproducts and enhancing nanoparticle stability through natural capping agents. This review article compares the green synthesis, characteri
extracts: Artabotrys hexapetalus, Justicia adhatoda, Gloriosa superba, and Murraya koenigii. Drawing from recent studies, we highlight variations in synthesis protocols, nanoparticle properties (e.g., size, shape, and band gap), and applications such as antibacterial, anticancer, and photocatalytic activities. Comparative analysis reveals plant-specific influences on NP morphology and efficacy, underscoring the potential for tailored biomedical and environmental uses.
Keywords: Green Synthesis, Nanoparticles, Metal oxide, Biological Application