Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
Juan M. Lema|Juan M Lema Rodicio
Environmental Biotechnology
Chemical Engineering
Wastewater treatment
Environmental Engineering
Metrics
H-Index
i10 Index
Citation
96
375
33,345
* Rankings
Ranking Based On Selection :2
Gumersindo Feijoo Costa
Life Cycle Assessment
Circular Economy
Carbon Footprint
Ecodesign
Biochemical Reactors
Metrics
H-Index
i10 Index
Citation
86
329
22,984
* Rankings
Ranking Based On Selection :3
Sara González-García
Chemical Engineering
Life Cycle Assessment
Sustainable Agri-food Biorefineries
Circular Economy
Sustainable diets
Metrics
H-Index
i10 Index
Citation
63
157
9,582
* Rankings
Ranking Based On Selection :4
Marta Carballa
Environmental biotechnology
environmental engineering
emerging contaminants
Metrics
H-Index
i10 Index
Citation
59
101
14,098
* Rankings
Ranking Based On Selection :5
Francisco Omil
environmental engineering
wastewater
bioreactors
biodegradation
Metrics
H-Index
i10 Index
Citation
59
87
13,001
* Rankings
Ranking Based On Selection :7
Almudena Hospido
Life Cycle Assessment
Energy Efficiency
Water-Energy Nexus
Bioplastics
Food processing and production
Metrics
H-Index
i10 Index
Citation
50
75
8,756
Juan M. Garrido
Chemical Engineering
Environmental Engineering
Water and Wastewater Treatment
Metrics
H-Index
i10 Index
Citation
34
52
4,406
* Rankings
Ranking Based On Selection :14
Isaac Fernández
Chemical Engineering
Environmental Engineering
Water and Wastewater
Metrics
H-Index
i10 Index
Citation
18
20
3,103
* Rankings
Ranking Based On Selection :15
Eugenio Fernández Carrasco
Ecodiseño
Huella Ecológica
Análisis de Ciclo de Vida
Evaluación de Riesgo Ambiental
Metrics
H-Index
i10 Index
Citation
16
18
3,507
* Rankings
Ranking Based On Selection :16
Ricardo Rebolledo-Leiva
Life Cycle Assessment
Circular Bioeconomy
Multi-criteria decision analysis
Metrics
H-Index
i10 Index
Citation
13
18
658
* Rankings
Ranking Based On Selection :17
Diego Martiñá Prieto
Chemical Engineering
Soil Science
Environmental Science
Biogeochesmisty
Water Treatment
Metrics
H-Index
i10 Index
Citation
12
14
598
Rankings
Ranking Based On Selection: 1
Juan M. Lema|Juan M Lema Rodicio
Metrics
H-Index
i10 Index
Citation Counts
96
375
33,345
Environmental Biotechnology
Chemical Engineering
Wastewater treatment
Environmental Engineering
Rankings
Ranking Based On Selection: 2
Gumersindo Feijoo Costa
Metrics
H-Index
i10 Index
Citation Counts
86
329
22,984
Life Cycle Assessment
Circular Economy
Carbon Footprint
Ecodesign
Biochemical Reactors
Rankings
Ranking Based On Selection: 3
Sara González-García
Metrics
H-Index
i10 Index
Citation Counts
63
157
9,582
Chemical Engineering
Life Cycle Assessment
Sustainable Agri-food Biorefineries
Circular Economy
Sustainable diets
Rankings
Ranking Based On Selection: 4
Marta Carballa
Metrics
H-Index
i10 Index
Citation Counts
59
101
14,098
Environmental biotechnology
environmental engineering
emerging contaminants
Rankings
Ranking Based On Selection: 5
Francisco Omil
Metrics
H-Index
i10 Index
Citation Counts
59
87
13,001
environmental engineering
wastewater
bioreactors
biodegradation
Rankings
Ranking Based On Selection: 6
Anuska Mosquera-Corral
Metrics
H-Index
i10 Index
Citation Counts
51
115
9,924
Wastewater treatment. Nitrogen removal. Biofilms. Granular biomass
Rankings
Ranking Based On Selection: 7
Almudena Hospido
Metrics
H-Index
i10 Index
Citation Counts
50
75
8,756
Life Cycle Assessment
Energy Efficiency
Water-Energy Nexus
Bioplastics
Food processing and production
Rankings
Ranking Based On Selection: 8
Juan M. Garrido
Metrics
H-Index
i10 Index
Citation Counts
34
52
4,406
Chemical Engineering
Environmental Engineering
Water and Wastewater Treatment
Rankings
Ranking Based On Selection: 9
Diego Gomez
Metrics
H-Index
i10 Index
Citation Counts
31
93
3,180
Rankings
Ranking Based On Selection: 10
Eva Rodil
Metrics
H-Index
i10 Index
Citation Counts
30
62
2,733
Rankings
Ranking Based On Selection: 11
Ángeles Val Del Río
Metrics
H-Index
i10 Index
Citation Counts
29
55
2,671
Rankings
Ranking Based On Selection: 12
Miguel Mauricio-Iglesias
Metrics
H-Index
i10 Index
Citation Counts
28
45
2,652
Modelling
Environmental biotechnology
Process Control
Rankings
Ranking Based On Selection: 13
Thelmo A. Lu-Chau
Metrics
H-Index
i10 Index
Citation Counts
25
48
3,147
Biorefinery
Environmental Technology
Chemical Engineering
Rankings
Ranking Based On Selection: 14
Isaac Fernández
Metrics
H-Index
i10 Index
Citation Counts
18
20
3,103
Chemical Engineering
Environmental Engineering
Water and Wastewater
Rankings
Ranking Based On Selection: 15
Eugenio Fernández Carrasco
Metrics
H-Index
i10 Index
Citation Counts
16
18
3,507
Ecodiseño
Huella Ecológica
Análisis de Ciclo de Vida
Evaluación de Riesgo Ambiental
Rankings
Ranking Based On Selection: 16
Ricardo Rebolledo-Leiva
Metrics
H-Index
i10 Index
Citation Counts
13
18
658
Life Cycle Assessment
Circular Bioeconomy
Multi-criteria decision analysis
Rankings
Ranking Based On Selection: 17
Diego Martiñá Prieto
Metrics
H-Index
i10 Index
Citation Counts
12
14
598
Chemical Engineering
Soil Science
Environmental Science
Biogeochesmisty
Water Treatment
Rankings
Ranking Based On Selection: 18
Antonio Cortés)
Metrics
H-Index
i10 Index
Citation Counts
10
11
423
Rankings
Ranking Based On Selection: 19
Jorge González Rodríguez
Metrics
H-Index
i10 Index
Citation Counts
7
7
166
Chemical Engineering
Catalysis
photo-Fenton
nanoparticles
Rankings
Ranking Based On Selection: 20
Abel Muñiz Mouro
Metrics
H-Index
i10 Index
Citation Counts
7
6
152
Biocatalysis
laccase
flavonoids
nutraceuticals
value-added products
Rankings
Ranking Based On Selection: 21
Lorenzo-Toja, Yago
Metrics
H-Index
i10 Index
Citation Counts
6
6
753
Ingenieria Quimica
Medioambiente
Tratamiento de Aguas