Africa Scientist and University Rankings 2025
Africa Engineering & Technology 2.070 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 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 6 years. As of Jan 31, 2025, 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 (873.690) 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 IndexRankings
Ranking Based On Selection: 1
Metrics
H-Index
i10 Index
Citation Counts
84
321
24,238
* Total H IndexRankings
Ranking Based On Selection: 2
Climate Change
Metrics
H-Index
i10 Index
Citation Counts
72
148
46,658
* Total H IndexRankings
Ranking Based On Selection: 3
Wastewater Technology
Algal Biotechnology
Biofuels
Bioremediation
Metrics
H-Index
i10 Index
Citation Counts
67
218
19,002
* Total H IndexRankings
Ranking Based On Selection: 4
Environmental Engineerning
Metrics
H-Index
i10 Index
Citation Counts
63
196
16,338
* Total H IndexRankings
Ranking Based On Selection: 5
enviornmental science
enviornmental biology
Metrics
H-Index
i10 Index
Citation Counts
60
321
18,190
* Total H IndexRankings
Ranking Based On Selection: 6
Wastewater treatment technologies
Bioreactors
Membrane technology
Water reuse
Microbial fuel
Metrics
H-Index
i10 Index
Citation Counts
55
167
16,073
* Total H IndexRankings
Ranking Based On Selection: 7
climate change mitigation
poverty
global stocktake
policy analysis
sustainable development
Metrics
H-Index
i10 Index
Citation Counts
54
131
16,212
* Total H IndexRankings
Ranking Based On Selection: 8
vulnerability
adaptation
climate change
development
Metrics
H-Index
i10 Index
Citation Counts
51
103
12,369
* Total H IndexRankings
Ranking Based On Selection: 9
Génie de l'Environnement
Génie des Procédés
Chimie de l'Environnement
Metrics
H-Index
i10 Index
Citation Counts
51
109
7,717
* Total H IndexRankings
Ranking Based On Selection: 10
Adsorption
Water treatment
nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
50
100
8,509
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* Total H IndexRankings
Ranking Based On Selection: 11
Environmental Science
Reproductive Toxicology
Endocrine Disruption
Hepatotoxicity
Drug Toxicity
Metrics
H-Index
i10 Index
Citation Counts
48
96
10,729
* Total H IndexRankings
Ranking Based On Selection: 12
sustainability engineering
biogas
LCA
Future Technologies
Metrics
H-Index
i10 Index
Citation Counts
46
194
9,126
* Total H IndexRankings
Ranking Based On Selection: 13
Climate Science
Metrics
H-Index
i10 Index
Citation Counts
43
79
11,047
* Total H IndexRankings
Ranking Based On Selection: 14
Water Microbiology
nanotechnology
biotechnology
Metrics
H-Index
i10 Index
Citation Counts
42
126
5,850
* Total H IndexRankings
Ranking Based On Selection: 15
Algal Biofuels
Biotechnology
Nutrient recovery
Metrics
H-Index
i10 Index
Citation Counts
41
49
7,532
* Total H IndexRankings
Ranking Based On Selection: 16
Environmental Engineering
Water Treatment
Desalination
Circular Economy
Metrics
H-Index
i10 Index
Citation Counts
41
61
6,857
* Total H IndexRankings
Ranking Based On Selection: 17
Advanced Oxidation Processes
Ozone
UV
Electrolysis
Metrics
H-Index
i10 Index
Citation Counts
41
85
10,028
* Total H IndexRankings
Ranking Based On Selection: 18
High Voltage Engineering
Lightning
EMI/EMC
Environmental Science
Extreme Natural Events
Metrics
H-Index
i10 Index
Citation Counts
40
136
8,486
* Total H IndexRankings
Ranking Based On Selection: 19
climate change
risk
biodiversity
health
sustainability
Metrics
H-Index
i10 Index
Citation Counts
39
63
14,120
* Total H IndexRankings
Ranking Based On Selection: 20
water resources analysis and modelling
water quality analysis and remediation
surface and groundwater hydrology
Metrics
H-Index
i10 Index
Citation Counts
39
101
5,444
* Total H IndexRankings
Ranking Based On Selection: 21
Microbiologie de l'Environnement
Metrics
H-Index
i10 Index
Citation Counts
39
100
4,666
* Total H IndexRankings
Ranking Based On Selection: 22
Climate Change
Loss and Damage
Disaster Risk Reduction
SDGs
Coastal Resilience and Livelihoods
Metrics
H-Index
i10 Index
Citation Counts
38
116
5,807
* Total H IndexRankings
Ranking Based On Selection: 23
Environmental Engineering
Wastewater Treatment
Environmental Modeling
Pollution
Waste Management
Metrics
H-Index
i10 Index
Citation Counts
38
99
4,521
* Total H IndexRankings
Ranking Based On Selection: 24
Sensors Applications
Environmental Science
air Pollution Control
Materials Science
Semiconductor
Metrics
H-Index
i10 Index
Citation Counts
38
77
3,536
* Total H IndexRankings
Ranking Based On Selection: 25
Climate change
sustainability
Metrics
H-Index
i10 Index
Citation Counts
38
78
15,282
Charlie Shackleton
Rhodes University
Grahamstown, South Africa
Metrics
H-Index
i10-Index
Citation Counts
84
321
24,238
Mark New
University of Cape Town
Cape Town, South Africa
Metrics
H-Index
i10-Index
Citation Counts
72
148
46,658
Faizal Bux
Metrics
H-Index
i10-Index
Citation Counts
67
218
19,002
Wastewater Technology
Algal Biotechnology
Biofuels
Bioremediation
George Ekama
University of Cape Town
Cape Town, South Africa
Metrics
H-Index
i10-Index
Citation Counts
63
196
16,338
Environmental Engineerning
Mazharuddin Khan
Addis Ababa University
Addis Ababa, Ethiopia
Metrics
H-Index
i10-Index
Citation Counts
60
321
18,190
enviornmental science
enviornmental biology
Ali Akbar Zinatizadeh
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
55
167
16,073
Wastewater treatment technologies
Bioreactors
Membrane technology
Water reuse
Microbial fuel
Harald Winkler
University of Cape Town
Cape Town, South Africa
Metrics
H-Index
i10-Index
Citation Counts
54
131
16,212
climate change mitigation
poverty
global stocktake
policy analysis
sustainable development
Gina Ziervogel
University of Cape Town
Cape Town, South Africa
Metrics
H-Index
i10-Index
Citation Counts
51
103
12,369
vulnerability
adaptation
climate change
development
Hakim Lounici
Université de Bouira
Bouïra, Algeria
Metrics
H-Index
i10-Index
Citation Counts
51
109
7,717
Génie de l'Environnement
Génie des Procédés
Chimie de l'Environnement
Maurice S. Onyango
Tshwane University of Technology
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
50
100
8,509
Adsorption
Water treatment
nanotechnology
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Mokhtar Ibrahim Yousef
Alexandria University
Alexandria, Egypt
Metrics
H-Index
i10-Index
Citation Counts
48
96
10,729
Environmental Science
Reproductive Toxicology
Endocrine Disruption
Hepatotoxicity
Drug Toxicity
Charles Mbohwa
University of Johannesburg
Johannesburg, South Africa
Metrics
H-Index
i10-Index
Citation Counts
46
194
9,126
sustainability engineering
biogas
LCA
Future Technologies
Christopher Lennard
University of Cape Town
Cape Town, South Africa
Metrics
H-Index
i10-Index
Citation Counts
43
79
11,047
MNB Momba
Tshwane University of Technology
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
42
126
5,850
Water Microbiology
nanotechnology
biotechnology
Ismail Rawat
Metrics
H-Index
i10-Index
Citation Counts
41
49
7,532
Algal Biofuels
Biotechnology
Nutrient recovery
Mohamed Chaker Ncibi
Mohammed VI Polytechnic University
Ben Guerir, Morocco
Metrics
H-Index
i10-Index
Citation Counts
41
61
6,857
Environmental Engineering
Water Treatment
Desalination
Circular Economy
Joon Wun Kang
Addis Ababa University
Addis Ababa, Ethiopia
Metrics
H-Index
i10-Index
Citation Counts
41
85
10,028
Advanced Oxidation Processes
Ozone
UV
Electrolysis
Chandima Gomes
University of the Witwatersrand
Johannesburg, South Africa
Metrics
H-Index
i10-Index
Citation Counts
40
136
8,486
High Voltage Engineering
Lightning
EMI/EMC
Environmental Science
Extreme Natural Events
Christopher Trisos
University of Cape Town
Cape Town, South Africa
Metrics
H-Index
i10-Index
Citation Counts
39
63
14,120
climate change
risk
biodiversity
health
sustainability
John Odiyo
University of Venda
Thohoyandou, South Africa
Metrics
H-Index
i10-Index
Citation Counts
39
101
5,444
water resources analysis and modelling
water quality analysis and remediation
surface and groundwater hydrology
Slim Abdelkafi
Université de Sfax
Sfax, Tunisia
Metrics
H-Index
i10-Index
Citation Counts
39
100
4,666
Microbiologie de l'Environnement
Godwell Nhamo
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
38
116
5,807
Climate Change
Loss and Damage
Disaster Risk Reduction
SDGs
Coastal Resilience and Livelihoods
Mahmoud Nasr
Egypt Japan University of Science & Technology
Alexandria, Egypt
Metrics
H-Index
i10-Index
Citation Counts
38
99
4,521
Environmental Engineering
Wastewater Treatment
Environmental Modeling
Pollution
Waste Management
Hassan Shokry
Egypt Japan University of Science & Technology
Alexandria, Egypt
Metrics
H-Index
i10-Index
Citation Counts
38
77
3,536
Sensors Applications
Environmental Science
air Pollution Control
Materials Science
Semiconductor
Barend Erasmus
University of Pretoria
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
38
78
15,282
Climate change
sustainability