The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 5 years. As of Jan 01, 2026, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (1.131.755) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
Rankings
Phytotoxicity and Phytoremidiation of heavy metals and industrial effluents | stress physiology | Environmental Science | biocha
H-Index Metrics
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H-Index127
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i10 Index632
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Citation Counts63,402
Rankings
Waste biorefinery | Waste-to-energy | Biofuels | Circular economy | Bioeconom
H-Index Metrics
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H-Index77
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i10 Index194
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Citation Counts22,028
Rankings
Environmental Health | Contaminants and Exposure | ecotoxicolog
H-Index Metrics
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H-Index72
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i10 Index218
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Citation Counts20,296
Rankings
Rankings
Energy System | Hydrogen Economy | Life Cycle Assessment | Science of Science | Techno-Economic Analysi
H-Index Metrics
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H-Index63
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i10 Index119
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Citation Counts9,248
Rankings
environmental Science | Biochemistry | Adsorption | Ultrafiltratio
H-Index Metrics
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H-Index46
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i10 Index166
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Citation Counts7,919
Rankings
Water Resources | Soil Resouces | Contaminants | Climate Chang
H-Index Metrics
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H-Index46
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i10 Index103
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Citation Counts6,973
Rankings
Composite Adsorbents | Water Treatment | Environmental Sustainability | WASH | Climate Chang
H-Index Metrics
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H-Index43
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i10 Index77
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Citation Counts5,377
Rankings
Biogeochemistry | Nutrient cycling | Biochar | SO
H-Index Metrics
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H-Index41
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i10 Index83
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Citation Counts6,777
Rankings
Ecotoxicology | Environmental Health | Biogeochemistry | Wastewater Treatment | Plant Biochemistr
H-Index Metrics
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H-Index41
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i10 Index66
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Citation Counts9,769
Rankings
Rankings
Environmental Microbiology & Biotechnology | Life Sciences | Wastewater Treatment | Bionanotechnolog
H-Index Metrics
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H-Index40
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i10 Index84
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Citation Counts6,554
Rankings
Rankings
Pharmacology | Anti-cancer | Endocrine diseases | Inflammatory diseases | Drug Developmen
H-Index Metrics
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H-Index37
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i10 Index101
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Citation Counts4,501
Rankings
water quality | arsenic and fluoride in groundwater | geochemistr
H-Index Metrics
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H-Index35
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i10 Index57
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Citation Counts4,403
Rankings
Conventional/Emerging pollutants | Environmental matrices | Climate change | Environmental-management and polic
H-Index Metrics
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H-Index32
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i10 Index49
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Citation Counts3,627
Rankings
Environmental Analysis of Air | Water and Soi
H-Index Metrics
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H-Index31
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i10 Index62
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Citation Counts4,909
Rankings
Electrocoagulation | ceramic membranes | Advanced oxidation | climate change adaptio
H-Index Metrics
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H-Index30
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i10 Index71
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Citation Counts3,729
Rankings
Electrocatalysis | Water Splitting | OER | Iridium Dioxide | Environmental Nanotechnolog
H-Index Metrics
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H-Index29
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i10 Index48
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Citation Counts2,540
Rankings
Soil Biogeochemistry | Soil Organic Matter | Biochar | Soil qualit
H-Index Metrics
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H-Index29
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i10 Index51
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Citation Counts4,637
Rankings
Plant Biotechnology | Bioprocess Technology | Nanobiotechnology | Controlled Environment Horticultur
H-Index Metrics
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H-Index29
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i10 Index40
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Citation Counts3,447
Rankings
Degraded soils | water | air quality and GIS mappin
H-Index Metrics
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H-Index29
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i10 Index59
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Citation Counts2,622
Rankings
Water and waste water treatment | Pretreatment of MSW | Biological Treatment | Waste Agricultural Biomass | Anaerobic co-digestion
H-Index Metrics
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H-Index29
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i10 Index82
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Citation Counts3,592
Rankings
Environmental Sciences | Microbiology | Drinking Water | Pesticide
H-Index Metrics
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H-Index29
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i10 Index55
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Citation Counts2,315
Rankings
Oral pathology | Periodontology | Oral medicin
H-Index Metrics
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H-Index29
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i10 Index98
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Citation Counts4,069
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