主题词：Membrane Separation Technologies; Advanced Photocatalysis Techniques; Extraction and Separation Processes; Advanced oxidation water treatment; Membrane Separation and Gas Transport; Membrane-based Ion Separation Techniques; Adsorption and biosorption for pollutant removal; Covalent Organic Framework Applications; Carbon Dioxide Capture Technologies; Catalytic Processes in Materials Science; Metal-Organic Frameworks: Synthesis and Applications; Environmental remediation with nanomaterials; Radioactive element chemistry and processing; Nanomaterials for catalytic reactions; Metal Extraction and Bioleaching; Ionic liquids properties and applications; Recycling and Waste Management Techniques; Surface Modification and Superhydrophobicity; Gas Sensing Nanomaterials and Sensors; Minerals Flotation and Separation Techniques; Solar-Powered Water Purification Methods; Chemical Synthesis and Characterization; Fuel Cells and Related Materials; TiO2 Photocatalysis and Solar Cells; Industrial Gas Emission Control