| Wastewater Treatment and Nitrogen Removal | Lifetime | 11 | CN 4 | 99.94 |
| Membrane Separation Technologies | Lifetime | 14 | CN 4 | 99.88 |
| Constructed Wetlands for Wastewater Treatment | Lifetime | 14 | CN 5 | 99.61 |
| Adsorption and biosorption for pollutant removal | Lifetime | 53 | CN 14 | 99.64 |
| Anaerobic Digestion and Biogas Production | Lifetime | 27 | CN 7 | 99.62 |
| Microplastics and Plastic Pollution | Lifetime | 84 | CN 25 | 99.23 |
| Microbial Fuel Cells and Bioremediation | Lifetime | 47 | CN 18 | 99.35 |
| Membrane-based Ion Separation Techniques | Lifetime | 77 | CN 25 | 99.07 |
| Water Treatment and Disinfection | Lifetime | 71 | CN 19 | 99.07 |
| Ammonia Synthesis and Nitrogen Reduction | Lifetime | 153 | CN 75 | 98.42 |
| Water Quality Monitoring and Analysis | Lifetime | 216 | CN 44 | 98.35 |
| Pharmaceutical and Antibiotic Environmental Impacts | Lifetime | 337 | CN 83 | 98.46 |
| Bacterial biofilms and quorum sensing | Lifetime | 299 | CN 7 | 98.24 |
| Nanomaterials for catalytic reactions | Lifetime | 526 | CN 218 | 97.84 |
| Effects and risks of endocrine disrupting chemicals | Lifetime | 374 | CN 51 | 97.93 |
| Recycling and Waste Management Techniques | Lifetime | 407 | CN 102 | 97.22 |
| Biofuel production and bioconversion | Lifetime | 847 | CN 154 | 97.54 |
| Microbial Metabolic Engineering and Bioproduction | Lifetime | 874 | CN 115 | 97.06 |
| thermodynamics and calorimetric analyses | Lifetime | 176 | CN 7 | 96.17 |
| Minerals Flotation and Separation Techniques | Lifetime | 453 | CN 126 | 96.39 |
| Algal biology and biofuel production | Lifetime | 678 | CN 83 | 96.47 |
| Phosphorus and nutrient management | Lifetime | 395 | CN 90 | 95.92 |
| Water Quality Monitoring Technologies | Lifetime | 465 | CN 101 | 94.46 |
| Wastewater Treatment and Reuse | Lifetime | 436 | CN 31 | 93.28 |
| Chromium effects and bioremediation | Lifetime | 490 | CN 100 | 92.38 |
| Electrostatics and Colloid Interactions | Lifetime | 917 | CN 25 | 90.90 |
| Regional Economic and Spatial Analysis | Lifetime | 809 | CN 314 | 82.41 |
| Wastewater Treatment and Nitrogen Removal | 2021-2025 | 9 | CN 6 | 99.52 |
| Pharmaceutical and Antibiotic Environmental Impacts | 2021-2025 | 84 | CN 58 | 98.04 |
| Constructed Wetlands for Wastewater Treatment | 2021-2025 | 32 | CN 19 | 97.42 |
| Algal biology and biofuel production | 2021-2025 | 96 | CN 22 | 97.38 |
| Adsorption and biosorption for pollutant removal | 2021-2025 | 363 | CN 87 | 95.33 |
| Membrane Separation Technologies | 2021-2025 | 389 | CN 211 | 95.62 |
| Microbial Fuel Cells and Bioremediation | 2021-2025 | 177 | CN 111 | 94.00 |
| Effects and risks of endocrine disrupting chemicals | 2021-2025 | 295 | CN 108 | 91.57 |
| Recycling and Waste Management Techniques | 2021-2025 | 625 | CN 241 | 92.36 |
| Nanomaterials for catalytic reactions | 2021-2025 | 729 | CN 304 | 91.55 |
| Ammonia Synthesis and Nitrogen Reduction | 2021-2025 | 501 | CN 396 | 92.10 |
| Water Quality Monitoring and Analysis | 2021-2025 | 308 | CN 153 | 87.35 |
| Phosphorus and nutrient management | 2021-2025 | 394 | CN 194 | 85.60 |
| Anaerobic Digestion and Biogas Production | 2021-2025 | 696 | CN 315 | 83.07 |
| Water Treatment and Disinfection | 2021-2025 | 838 | CN 551 | 77.67 |
| Wastewater Treatment and Reuse | 2021-2025 | 529 | CN 68 | 69.59 |
| Fluoride Effects and Removal | 2021-2025 | 373 | CN 155 | 68.07 |
| Subcritical and Supercritical Water Processes | 2021-2025 | 608 | CN 334 | 55.49 |
