主题词：Recycling and Waste Management Techniques; Municipal Solid Waste Management; Recycling and utilization of industrial and municipal waste in materials production; Concrete and Cement Materials Research; Extraction and Separation Processes; Recycled Aggregate Concrete Performance; Healthcare and Environmental Waste Management; Microplastics and Plastic Pollution; Thermochemical Biomass Conversion Processes; Anaerobic Digestion and Biogas Production; Landfill Environmental Impact Studies; Innovative concrete reinforcement materials; Food Waste Reduction and Sustainability; Composting and Vermicomposting Techniques; Coal and Its By-products; Sustainable Supply Chain Management; Phosphorus and nutrient management; Natural Fiber Reinforced Composites; Biofuel production and bioconversion; biodegradable polymer synthesis and properties; Adsorption and biosorption for pollutant removal; Magnesium Oxide Properties and Applications; Toxic Organic Pollutants Impact; Metal Extraction and Bioleaching; Innovations in Concrete and Construction Materials