| Environmental Science and Ecology | Lifetime | 32 | ZA 2 | 99.99 |
| Engineering, Technology and Energy | Lifetime | 1,000 | ZA 1 | 99.84 |
| Chemistry | Lifetime | 686 | ZA 3 | 99.49 |
| Materials Science | Lifetime | 836 | ZA 3 | 99.61 |
| Environmental Science and Ecology | 2021-2025 | 12 | ZA 1 | 99.99 |
| Engineering, Technology and Energy | 2021-2025 | 416 | ZA 1 | 99.90 |
| Materials Science | 2021-2025 | 118 | ZA 1 | 99.82 |
| Chemistry | 2021-2025 | 125 | ZA 1 | 99.39 |
| Water Science and Technology | Lifetime | 7 | ZA 1 | 99.98 |
| Industrial Environmental Engineering | Lifetime | 10 | ZA 1 | 99.90 |
| Renewable Energy, Sustainability and the Environment | Lifetime | 146 | ZA 1 | 99.65 |
| Biomedical Engineering | Lifetime | 375 | ZA 2 | 99.48 |
| Environmental Chemistry | Lifetime | 112 | ZA 1 | 99.13 |
| Pollution | Lifetime | 139 | ZA 2 | 99.26 |
| Electrical and Electronic Engineering | Lifetime | 871 | ZA 3 | 99.25 |
| Materials Chemistry | Lifetime | 689 | ZA 1 | 99.28 |
| Health, Toxicology and Mutagenesis | Lifetime | 289 | ZA 1 | 98.85 |
| Analytical Chemistry | Lifetime | 137 | ZA 1 | 98.45 |
| Mechanical Engineering | Lifetime | 882 | ZA 2 | 98.58 |
| Organic Chemistry | Lifetime | 932 | ZA 5 | 97.80 |
| Geochemistry and Petrology | Lifetime | 235 | ZA 1 | 96.76 |
| Biomaterials | Lifetime | 834 | ZA 4 | 92.42 |
| Electrochemistry | Lifetime | 424 | ZA 1 | 89.36 |
| Bioengineering | Lifetime | 433 | ZA 2 | 85.40 |
| Nanoscience and Nanotechnology | Lifetime | 456 | ZA 1 | 81.06 |
| Atmospheric Science and Meteorology | Lifetime | 896 | ZA 1 | 80.60 |
| Water Science and Technology | 2021-2025 | 2 | ZA 1 | 99.97 |
| Industrial Environmental Engineering | 2021-2025 | 12 | ZA 1 | 99.43 |
| Materials Chemistry | 2021-2025 | 80 | ZA 1 | 99.70 |
| Renewable Energy, Sustainability and the Environment | 2021-2025 | 64 | ZA 1 | 99.68 |
| Pollution | 2021-2025 | 58 | ZA 1 | 99.25 |
| Biomedical Engineering | 2021-2025 | 272 | ZA 2 | 98.72 |
| Electrical and Electronic Engineering | 2021-2025 | 656 | ZA 2 | 98.48 |
| Organic Chemistry | 2021-2025 | 183 | ZA 1 | 96.74 |
| Health, Toxicology and Mutagenesis | 2021-2025 | 291 | ZA 2 | 95.33 |
| Mechanical Engineering | 2021-2025 | 772 | ZA 2 | 94.47 |
| Analytical Chemistry | 2021-2025 | 112 | ZA 2 | 93.19 |
| Nanoscience and Nanotechnology | 2021-2025 | 69 | ZA 1 | 86.36 |
| Biomaterials | 2021-2025 | 403 | ZA 3 | 86.12 |
| Chemical Synthesis and Catalysis | 2021-2025 | 300 | ZA 1 | 86.25 |
| Polymers, Plastics and Soft Materials | 2021-2025 | 406 | ZA 5 | 83.88 |
| Infectious Diseases | 2021-2025 | 760 | ZA 16 | 81.40 |
| Catalysis | 2021-2025 | 398 | ZA 2 | 72.91 |
| Water Quality Monitoring and Analysis | Lifetime | 1 | ZA 1 | 99.94 |
| Adsorption and biosorption for pollutant removal | Lifetime | 5 | ZA 1 | 99.97 |
| Nanomaterials for catalytic reactions | Lifetime | 10 | ZA 1 | 99.94 |
| Extraction and Separation Processes | Lifetime | 15 | ZA 1 | 99.77 |
| Advanced oxidation water treatment | Lifetime | 10 | ZA 1 | 99.87 |
| Advanced Photocatalysis Techniques | Lifetime | 60 | ZA 1 | 99.88 |
| Electrokinetic Soil Remediation Techniques | Lifetime | 3 | ZA 1 | 99.47 |
| Water Treatment and Disinfection | Lifetime | 16 | ZA 1 | 99.68 |
| Analytical chemistry methods development | Lifetime | 50 | ZA 1 | 99.52 |
| Environmental remediation with nanomaterials | Lifetime | 18 | ZA 1 | 99.64 |
| Environmental Chemistry and Analysis | Lifetime | 9 | ZA 1 | 99.35 |
| Membrane Separation Technologies | Lifetime | 80 | ZA 1 | 99.48 |
| Recycling and Waste Management Techniques | Lifetime | 83 | ZA 2 | 98.96 |
| TiO2 Photocatalysis and Solar Cells | Lifetime | 107 | ZA 1 | 99.39 |
| Water Quality and Pollution Assessment | Lifetime | 82 | ZA 1 | 98.98 |
| Microplastics and Plastic Pollution | Lifetime | 120 | ZA 2 | 98.90 |
| Phosphorus and nutrient management | Lifetime | 67 | ZA 1 | 98.93 |
| Nanoparticles: synthesis and applications | Lifetime | 172 | ZA 3 | 98.77 |
| Electrochemical Analysis and Applications | Lifetime | 546 | ZA 4 | 98.56 |
| Arsenic contamination and mitigation | Lifetime | 103 | ZA 1 | 98.49 |
| Pharmaceutical and Antibiotic Environmental Impacts | Lifetime | 254 | ZA 2 | 98.75 |
| Gas Sensing Nanomaterials and Sensors | Lifetime | 603 | ZA 3 | 98.44 |
| Groundwater and Isotope Geochemistry | Lifetime | 173 | ZA 1 | 98.36 |
| Fluoride Effects and Removal | Lifetime | 60 | ZA 1 | 97.76 |
| Wastewater Treatment and Reuse | Lifetime | 78 | ZA 2 | 98.32 |
| Iron oxide chemistry and applications | Lifetime | 161 | ZA 1 | 97.89 |
| Chemical Synthesis and Characterization | Lifetime | 258 | ZA 2 | 97.89 |
| Covalent Organic Framework Applications | Lifetime | 284 | ZA 1 | 98.30 |
| Advanced Chemical Sensor Technologies | Lifetime | 628 | ZA 2 | 97.70 |
| Radioactive element chemistry and processing | Lifetime | 542 | ZA 2 | 97.43 |
| Advanced Nanomaterials in Catalysis | Lifetime | 485 | ZA 3 | 97.88 |
| Geophysical and Geoelectrical Methods | Lifetime | 266 | ZA 2 | 97.43 |
| Graphene and Nanomaterials Applications | Lifetime | 443 | ZA 2 | 97.51 |
| Mine drainage and remediation techniques | Lifetime | 167 | ZA 1 | 97.58 |
| Electrochemical sensors and biosensors | Lifetime | 925 | ZA 8 | 97.36 |
| Mercury impact and mitigation studies | Lifetime | 402 | ZA 1 | 97.09 |
| Dye analysis and toxicity | Lifetime | 150 | ZA 1 | 95.56 |
| Heavy metals in environment | Lifetime | 968 | ZA 1 | 96.98 |
| Advanced Cellulose Research Studies | Lifetime | 615 | ZA 3 | 96.02 |
| Minerals Flotation and Separation Techniques | Lifetime | 577 | ZA 15 | 95.78 |
| SARS-CoV-2 detection and testing | Lifetime | 494 | ZA 6 | 93.21 |
| Geochemistry and Elemental Analysis | Lifetime | 683 | ZA 7 | 96.27 |
| Water Quality Monitoring Technologies | Lifetime | 510 | ZA 3 | 94.00 |
| Membrane-based Ion Separation Techniques | Lifetime | 653 | ZA 3 | 95.14 |
| Metal Extraction and Bioleaching | Lifetime | 865 | ZA 16 | 94.23 |
| Layered Double Hydroxides Synthesis and Applications | Lifetime | 523 | ZA 1 | 93.07 |
| Healthcare and Environmental Waste Management | Lifetime | 216 | ZA 1 | 91.11 |
| Magnesium Oxide Properties and Applications | Lifetime | 605 | ZA 2 | 93.18 |
| Coagulation and Flocculation Studies | Lifetime | 256 | ZA 3 | 91.59 |
| Chromium effects and bioremediation | Lifetime | 721 | ZA 5 | 90.00 |
| Solar-Powered Water Purification Methods | Lifetime | 927 | ZA 3 | 90.05 |
| Odor and Emission Control Technologies | Lifetime | 629 | ZA 1 | 90.53 |
| Magnetic and Electromagnetic Effects | Lifetime | 985 | ZA 5 | 89.10 |
| Laser-Ablation Synthesis of Nanoparticles | Lifetime | 903 | ZA 5 | 87.55 |
| Landfill Environmental Impact Studies | Lifetime | 591 | ZA 4 | 88.98 |
| Ultrasound and Cavitation Phenomena | Lifetime | 650 | ZA 1 | 87.65 |
| COVID-19 impact on air quality | Lifetime | 331 | ZA 2 | 82.25 |
| Scientific and Engineering Research Topics | Lifetime | 560 | ZA 1 | 46.32 |
| Adsorption and biosorption for pollutant removal | 2021-2025 | 2 | ZA 1 | 99.92 |
| Nanomaterials for catalytic reactions | 2021-2025 | 4 | ZA 1 | 99.82 |
| TiO2 Photocatalysis and Solar Cells | 2021-2025 | 3 | ZA 1 | 99.57 |
| Advanced Photocatalysis Techniques | 2021-2025 | 37 | ZA 1 | 99.84 |
| Membrane Separation Technologies | 2021-2025 | 35 | ZA 1 | 99.33 |
| Advanced oxidation water treatment | 2021-2025 | 48 | ZA 1 | 98.89 |
| Water Quality Monitoring and Analysis | 2021-2025 | 25 | ZA 1 | 97.37 |
| Electrochemical Analysis and Applications | 2021-2025 | 150 | ZA 2 | 97.58 |
| Electrochemical sensors and biosensors | 2021-2025 | 153 | ZA 3 | 97.56 |
| Environmental remediation with nanomaterials | 2021-2025 | 45 | ZA 1 | 97.27 |
| Nanoparticles: synthesis and applications | 2021-2025 | 125 | ZA 5 | 97.87 |
| Advanced Nanomaterials in Catalysis | 2021-2025 | 207 | ZA 2 | 97.78 |
| Dye analysis and toxicity | 2021-2025 | 13 | ZA 1 | 97.42 |
| Microplastics and Plastic Pollution | 2021-2025 | 206 | ZA 2 | 97.62 |
| Pharmaceutical and Antibiotic Environmental Impacts | 2021-2025 | 138 | ZA 2 | 97.35 |
| Covalent Organic Framework Applications | 2021-2025 | 205 | ZA 1 | 97.31 |
| Recycling and Waste Management Techniques | 2021-2025 | 186 | ZA 1 | 97.08 |
| SARS-CoV-2 detection and testing | 2021-2025 | 187 | ZA 2 | 95.67 |
| Extraction and Separation Processes | 2021-2025 | 220 | ZA 1 | 96.38 |
| Gas Sensing Nanomaterials and Sensors | 2021-2025 | 391 | ZA 4 | 96.79 |
| Copper-based nanomaterials and applications | 2021-2025 | 241 | ZA 3 | 96.00 |
| Graphene and Nanomaterials Applications | 2021-2025 | 266 | ZA 7 | 94.34 |
| Healthcare and Environmental Waste Management | 2021-2025 | 54 | ZA 1 | 92.29 |
| Analytical chemistry methods development | 2021-2025 | 309 | ZA 8 | 92.81 |
| Water Quality Monitoring Technologies | 2021-2025 | 187 | ZA 1 | 91.36 |
| Iron oxide chemistry and applications | 2021-2025 | 123 | ZA 2 | 90.90 |
| Metal-Organic Frameworks: Synthesis and Applications | 2021-2025 | 984 | ZA 1 | 93.25 |
| Analytical Chemistry and Sensors | 2021-2025 | 764 | ZA 7 | 90.27 |
| Phosphorus and nutrient management | 2021-2025 | 230 | ZA 2 | 89.54 |
| Mercury impact and mitigation studies | 2021-2025 | 329 | ZA 1 | 89.26 |
| Chromium effects and bioremediation | 2021-2025 | 128 | ZA 2 | 87.05 |
| Water Treatment and Disinfection | 2021-2025 | 295 | ZA 1 | 89.51 |
| COVID-19 impact on air quality | 2021-2025 | 119 | ZA 1 | 86.05 |
| Toxic Organic Pollutants Impact | 2021-2025 | 741 | ZA 4 | 87.67 |
| Wastewater Treatment and Nitrogen Removal | 2021-2025 | 671 | ZA 3 | 89.12 |
| Carbon and Quantum Dots Applications | 2021-2025 | 887 | ZA 6 | 84.77 |
| Chemical Synthesis and Characterization | 2021-2025 | 507 | ZA 2 | 82.88 |
| Medicinal Plants and Neuroprotection | 2021-2025 | 377 | ZA 7 | 80.61 |
| Heavy Metal Exposure and Toxicity | 2021-2025 | 795 | ZA 1 | 81.97 |
| Membrane-based Ion Separation Techniques | 2021-2025 | 819 | ZA 5 | 85.01 |
| Layered Double Hydroxides Synthesis and Applications | 2021-2025 | 423 | ZA 3 | 79.38 |
| Electrohydrodynamics and Fluid Dynamics | 2021-2025 | 732 | ZA 3 | 79.50 |
| Thermal Expansion and Ionic Conductivity | 2021-2025 | 627 | ZA 1 | 78.78 |
| Magnesium Oxide Properties and Applications | 2021-2025 | 835 | ZA 5 | 81.17 |
| Magnetic Properties and Synthesis of Ferrites | 2021-2025 | 709 | ZA 6 | 78.33 |
| Water-Energy-Food Nexus Studies | 2021-2025 | 656 | ZA 10 | 77.04 |
| Chemical Synthesis and Reactions | 2021-2025 | 767 | ZA 4 | 73.10 |
| Clay minerals and soil interactions | 2021-2025 | 733 | ZA 5 | 71.54 |
| Heusler alloys: electronic and magnetic properties | 2021-2025 | 769 | ZA 1 | 70.86 |
| Wastewater Treatment and Reuse | 2021-2025 | 655 | ZA 11 | 66.10 |
| Chemistry and Chemical Engineering | 2021-2025 | 456 | ZA 7 | 62.97 |
| Polymer Nanocomposite Synthesis and Irradiation | 2021-2025 | 931 | ZA 10 | 52.20 |
| Coagulation and Flocculation Studies | 2021-2025 | 365 | ZA 11 | 50.57 |
| Scientific and Engineering Research Topics | 2021-2025 | 255 | ZA 1 | 52.93 |
| Oil Spill Detection and Mitigation | 2021-2025 | 615 | ZA 1 | 44.75 |