主题词：Nanoparticles: synthesis and applications; Advanced Photocatalysis Techniques; Microplastics and Plastic Pollution; Advanced Nanomaterials in Catalysis; Graphene and Nanomaterials Applications; Carbon and Quantum Dots Applications; Diverse Scientific and Economic Studies; Environmental remediation with nanomaterials; Catalytic Processes in Materials Science; Iron oxide chemistry and applications; Nanomaterials for catalytic reactions; Membrane Separation Technologies; Gas Sensing Nanomaterials and Sensors; Electrochemical Analysis and Applications; Cell Image Analysis Techniques; Biotechnology and Related Fields; Adsorption and biosorption for pollutant removal; TiO2 Photocatalysis and Solar Cells; Arsenic contamination and mitigation; Advanced oxidation water treatment; Geochemistry and Elemental Analysis; Radioactive element chemistry and processing; Graphene research and applications; Covalent Organic Framework Applications; Recycling and Waste Management Techniques