Avadaiappan Aarthi, Antony Smonia Joe Princy Soosai, Franci Bindhu, Mahalingam Umadevi, Ramasamy Parimaladevi, Conchalish Hentry, Sath Vasant
Department of Physics, Mother Teresa Women's University, Kodaikanal, 624102, India.
Department of Physics, St. Jude's College, Thoothoor, 629176, India.
Environ Sci Pollut Res Int. 2022 Dec;29(60):90023-90033. doi: 10.1007/s11356-022-22058-0. Epub 2022 Jul 21.
Mismanagement of obsolete solid waste generates a massive deteriorating effect on the environment. There is a high level of open trash disposal contaminating its neighboring water bodies. This despoliation trash causes an endangerment to the living environment. The waste management act is to hinder harmful effects on human beings, animals, plants, and their natural environment through the principles of waste prevention, waste processing, and waste disposal. Surface-enhanced Raman scattering (SERS) enhances the hazardous chemical sensing of environmental pollutants. To vigorously focus on the leaching of a couple of landfills in groundwater and surface water, an unusual combination of SERS-based poly vinyl thiol and silica-modified silver nanocomposites (PVT/SiO2@Ag NCs) was synthesized. The optical, crystalline, and structural properties of PVT/SiO@Ag NCs were described with UV-visible spectroscopy (UV-Vis), X-ray diffractometer (XRD), transmission electron microscope (TEM), and energy-dispersive X-ray analysis (EDX). The surface plasmon resonance (SPR) is detected at 403 nm from the PVT/SiO@Ag NPs. The average crystallite size of PVT/SiO @ Ag NCs is estimated using the Scherrer formula as 11 nm. The calculated specific surface area (SSA), strains, and dislocation densities demonstrate the improved mechanical properties of the substrate. The well-separated spherical shape of NPs is also observed, and the composition of silica and sulfur element in addition of Ag was confirmed by EDAX. Negatively charged SiO were bound strongly with the SH group and Ag NPs through electrostatic interaction mechanism as S-Ag-O-Si-O-Ag-S. SERS sensitivity is demonstrated by the prepared nanoparticles using an environmentally ignored leachate of municipal solid waste (MSW) and tannery waste (TW) landfill. PVT/SiO@Ag NCs has detected the presence of innards of MSW leachate viz., aromatic hydrocarbon, phenols, phthalates, and pesticide from the groundwater. Furthermore, the TW leachate compositions of benzenes, hydrocarbons, amines, and chromium VI were analytically identified. Also, the leaching of TW leachate was confirmed in the water samples referred. Hence, this study provides a novel SERS sensor of PVT/SiO@Ag NCs in the tile to detect and analyze environmentally ignored organic and inorganic compounds.
废弃固体垃圾管理不善会对环境产生巨大的恶化影响。存在大量露天垃圾处理，污染周边水体。这种被破坏的垃圾对生存环境造成危害。废物管理法案旨在通过废物预防、废物处理和废物处置原则，防止对人类、动物、植物及其自然环境产生有害影响。表面增强拉曼散射（SERS）增强了对环境污染物的有害化学传感。为了大力关注一些垃圾填埋场在地下水和地表水中的渗滤液情况，合成了一种基于SERS的聚乙烯硫醇和二氧化硅改性银纳米复合材料（PVT/SiO2@Ag NCs）的特殊组合。通过紫外可见光谱（UV-Vis）、X射线衍射仪（XRD）、透射电子显微镜（TEM）和能量色散X射线分析（EDX）对PVT/SiO@Ag NCs的光学、晶体和结构性质进行了描述。从PVT/SiO@Ag NPs在403nm处检测到表面等离子体共振（SPR）。使用谢乐公式估计PVT/SiO @ Ag NCs的平均微晶尺寸为11nm。计算得到的比表面积（SSA）、应变和位错密度表明了基底力学性能的改善。还观察到NPs呈良好分离的球形，通过能谱分析（EDAX）证实了除Ag外还有硅和硫元素的组成。带负电荷的SiO通过静电相互作用机制以S-Ag-O-Si-O-Ag-S的形式与SH基团和Ag NPs牢固结合。使用城市固体废物（MSW）和制革厂废物（TW）填埋场被环境忽视的渗滤液，通过制备的纳米颗粒证明了SERS的灵敏度。PVT/SiO@Ag NCs检测到了MSW渗滤液中的内部成分，即地下水中的芳烃、酚类、邻苯二甲酸盐和农药。此外，还对TW渗滤液中的苯、烃类、胺类和六价铬成分进行了分析鉴定。同时，在所提及的水样中证实了TW渗滤液的渗滤情况。因此，本研究提供了一种用于检测和分析被环境忽视的有机和无机化合物的新型PVT/SiO@Ag NCs SERS传感器。
