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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 03, 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 (1.131.752) 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].
* Total H Index Rankings
Rankings
4,172
World Rank
5
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Phytotoxicity and Phytoremidiation of heavy metals and industrial effluents | stress physiology | Environmental Science | biocha
Phytotoxicity and Phytoremidiation of heavy metals and industrial effluents | stress physiology | Environmental Science | biocha
H-Index Metrics
-
H-Index127
-
i10 Index632
-
Citation Counts63,402
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* Total H Index Rankings
Rankings
26,311
World Rank
42
Country Rank
1
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Waste biorefinery | Waste-to-energy | Biofuels | Circular economy | Bioeconom
Waste biorefinery | Waste-to-energy | Biofuels | Circular economy | Bioeconom
H-Index Metrics
-
H-Index77
-
i10 Index194
-
Citation Counts22,028
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* Total H Index Rankings
Rankings
32,969
World Rank
58
Country Rank
5
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Environmental Health | Contaminants and Exposure | ecotoxicolog
Environmental Health | Contaminants and Exposure | ecotoxicolog
H-Index Metrics
-
H-Index72
-
i10 Index218
-
Citation Counts20,296
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* Total H Index Rankings
Rankings
48,936
World Rank
84
Country Rank
1
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
49,154
World Rank
87
Country Rank
1
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
Energy System | Hydrogen Economy | Life Cycle Assessment | Science of Science | Techno-Economic Analysi
Energy System | Hydrogen Economy | Life Cycle Assessment | Science of Science | Techno-Economic Analysi
H-Index Metrics
-
H-Index63
-
i10 Index119
-
Citation Counts9,248
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* Total H Index Rankings
Rankings
112,359
World Rank
275
Country Rank
4
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
environmental Science | Biochemistry | Adsorption | Ultrafiltratio
environmental Science | Biochemistry | Adsorption | Ultrafiltratio
H-Index Metrics
-
H-Index46
-
i10 Index166
-
Citation Counts7,919
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* Total H Index Rankings
Rankings
112,579
World Rank
278
Country Rank
9
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Water Resources | Soil Resouces | Contaminants | Climate Chang
Water Resources | Soil Resouces | Contaminants | Climate Chang
H-Index Metrics
-
H-Index46
-
i10 Index103
-
Citation Counts6,973
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* Total H Index Rankings
Rankings
133,815
World Rank
385
Country Rank
9
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Composite Adsorbents | Water Treatment | Environmental Sustainability | WASH | Climate Chang
Composite Adsorbents | Water Treatment | Environmental Sustainability | WASH | Climate Chang
H-Index Metrics
-
H-Index43
-
i10 Index77
-
Citation Counts5,377
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* Total H Index Rankings
Rankings
146,248
World Rank
438
Country Rank
26
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
Biogeochemistry | Nutrient cycling | Biochar | SO
Biogeochemistry | Nutrient cycling | Biochar | SO
H-Index Metrics
-
H-Index41
-
i10 Index83
-
Citation Counts6,777
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* Total H Index Rankings
Rankings
146,317
World Rank
439
Country Rank
6
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Ecotoxicology | Environmental Health | Biogeochemistry | Wastewater Treatment | Plant Biochemistr
Ecotoxicology | Environmental Health | Biogeochemistry | Wastewater Treatment | Plant Biochemistr
H-Index Metrics
-
H-Index41
-
i10 Index66
-
Citation Counts9,769
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* Total H Index Rankings
Rankings
154,189
World Rank
470
Country Rank
16
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
154,686
World Rank
484
Country Rank
31
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Environmental Microbiology & Biotechnology | Life Sciences | Wastewater Treatment | Bionanotechnolog
Environmental Microbiology & Biotechnology | Life Sciences | Wastewater Treatment | Bionanotechnolog
H-Index Metrics
-
H-Index40
-
i10 Index84
-
Citation Counts6,554
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* Total H Index Rankings
Rankings
172,775
World Rank
569
Country Rank
37
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
181,942
World Rank
609
Country Rank
7
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Pharmacology | Anti-cancer | Endocrine diseases | Inflammatory diseases | Drug Developmen
Pharmacology | Anti-cancer | Endocrine diseases | Inflammatory diseases | Drug Developmen
H-Index Metrics
-
H-Index37
-
i10 Index101
-
Citation Counts4,501
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* Total H Index Rankings
Rankings
203,822
World Rank
732
Country Rank
45
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
water quality | arsenic and fluoride in groundwater | geochemistr
water quality | arsenic and fluoride in groundwater | geochemistr
H-Index Metrics
-
H-Index35
-
i10 Index57
-
Citation Counts4,403
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* Total H Index Rankings
Rankings
241,718
World Rank
932
Country Rank
7
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
Conventional/Emerging pollutants | Environmental matrices | Climate change | Environmental-management and polic
Conventional/Emerging pollutants | Environmental matrices | Climate change | Environmental-management and polic
H-Index Metrics
-
H-Index32
-
i10 Index49
-
Citation Counts3,627
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* Total H Index Rankings
Rankings
261,764
World Rank
1,071
Country Rank
28
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Environmental Analysis of Air | Water and Soi
Environmental Analysis of Air | Water and Soi
H-Index Metrics
-
H-Index31
-
i10 Index62
-
Citation Counts4,909
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* Total H Index Rankings
Rankings
270,483
World Rank
1,096
Country Rank
10
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
Electrocoagulation | ceramic membranes | Advanced oxidation | climate change adaptio
Electrocoagulation | ceramic membranes | Advanced oxidation | climate change adaptio
H-Index Metrics
-
H-Index30
-
i10 Index71
-
Citation Counts3,729
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* Total H Index Rankings
Rankings
287,088
World Rank
1,193
Country Rank
54
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Electrocatalysis | Water Splitting | OER | Iridium Dioxide | Environmental Nanotechnolog
Electrocatalysis | Water Splitting | OER | Iridium Dioxide | Environmental Nanotechnolog
H-Index Metrics
-
H-Index29
-
i10 Index48
-
Citation Counts2,540
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* Total H Index Rankings
Rankings
287,755
World Rank
1,205
Country Rank
61
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Soil Biogeochemistry | Soil Organic Matter | Biochar | Soil qualit
Soil Biogeochemistry | Soil Organic Matter | Biochar | Soil qualit
H-Index Metrics
-
H-Index29
-
i10 Index51
-
Citation Counts4,637
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* Total H Index Rankings
Rankings
288,133
World Rank
1,210
Country Rank
10
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Plant Biotechnology | Bioprocess Technology | Nanobiotechnology | Controlled Environment Horticultur
Plant Biotechnology | Bioprocess Technology | Nanobiotechnology | Controlled Environment Horticultur
H-Index Metrics
-
H-Index29
-
i10 Index40
-
Citation Counts3,447
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* Total H Index Rankings
Rankings
289,740
World Rank
1,223
Country Rank
87
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
Degraded soils | water | air quality and GIS mappin
Degraded soils | water | air quality and GIS mappin
H-Index Metrics
-
H-Index29
-
i10 Index59
-
Citation Counts2,622
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* Total H Index Rankings
Rankings
290,799
World Rank
1,231
Country Rank
9
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Water and waste water treatment | Pretreatment of MSW | Biological Treatment | Waste Agricultural Biomass | Anaerobic co-digestion
Water and waste water treatment | Pretreatment of MSW | Biological Treatment | Waste Agricultural Biomass | Anaerobic co-digestion
H-Index Metrics
-
H-Index29
-
i10 Index82
-
Citation Counts3,592
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* Total H Index Rankings
Rankings
292,739
World Rank
1,244
Country Rank
57
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
Environmental Sciences | Microbiology | Drinking Water | Pesticide
Environmental Sciences | Microbiology | Drinking Water | Pesticide
H-Index Metrics
-
H-Index29
-
i10 Index55
-
Citation Counts2,315
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* Total H Index Rankings
Rankings
295,119
World Rank
1,251
Country Rank
89
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Oral pathology | Periodontology | Oral medicin
Oral pathology | Periodontology | Oral medicin
H-Index Metrics
-
H-Index29
-
i10 Index98
-
Citation Counts4,069
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