Citation Rankings
Highly Cited Researchers
Arab League Highly Cited Researchers CitationEngineering & Technology / Environmental Science & Engineering Rankings 2025
Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Water Treatment
Waste to Value-added Products
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
92,638
38,499
0.416
* Total Citation Counts Rankings
Ranking Based On Selection :2
Environmental Engineering
Green Chemistry
Chemical Engineering
Water Treatment
Environmental Analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,841
60,956
0.718
* Total Citation Counts Rankings
Ranking Based On Selection :3
Membrane technology for water and wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,567
8,179
0.347
* Total Citation Counts Rankings
Ranking Based On Selection :4
Environmental Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,775
11,884
0.669
* Total Citation Counts Rankings
Ranking Based On Selection :5
chronic respirotery disease
Air pollution
Health programing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,857
5,793
0.344
* Total Citation Counts Rankings
Ranking Based On Selection :6
Water desalination
Renewable energy
Desalination economics
Innovative desalination technologies
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,508
11,905
0.721
* Total Citation Counts Rankings
Ranking Based On Selection :7
Analytical and environmental chemistry
Environmental Remediation
Validation method in analytical chemistry
Remediation
Adsor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,353
10,297
0.771
* Total Citation Counts Rankings
Ranking Based On Selection :8
Climate change biology
climate change ecology
climate change vulnerability
arctic ecology
ITEX
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,602
8,249
0.655
* Total Citation Counts Rankings
Ranking Based On Selection :9
Waste management
Water resources management
Air pollution control
Climate change and sustainable development
Environmental i
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,991
4,942
0.412
* Total Citation Counts Rankings
Ranking Based On Selection :10
Antimicrobial Agents
Nanoformulation
Silver nanoparticles
Phosphate solubilization
Biofilm
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,954
8,609
0.720
* Total Citation Counts Rankings
Ranking Based On Selection :11
Electrochemistry
Physical Chemistry
Nanotechnology
Renewable Energy
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,783
8,391
0.778
* Total Citation Counts Rankings
Ranking Based On Selection :12
Environmental Science
Reproductive Toxicology
Endocrine Disruption
Hepatotoxicity
Drug Toxicity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,416
3,759
0.361
* Total Citation Counts Rankings
Ranking Based On Selection :13
Environmental Biotechnology
Microbial Electrochemical Systems
Aerobic Granular Sludge
Anammox
Resource Recovery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,617
6,499
0.754
* Total Citation Counts Rankings
Ranking Based On Selection :14
Water Treatment
Seawater Desalination
Wastewater Reuse
Reverse Osmosis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,588
5,390
0.628
* Total Citation Counts Rankings
Ranking Based On Selection :15
Climate
Climate Change
Impact of Climate Change in water resources and environment
climate extremes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,276
6,634
0.802
* Total Citation Counts Rankings
Ranking Based On Selection :16
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,010
5,491
0.686
* Total Citation Counts Rankings
Ranking Based On Selection :17
Génie de l'Environnement
Génie des Procédés
Chimie de l'Environnement
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,415
3,460
0.467
* Total Citation Counts Rankings
Ranking Based On Selection :18
Integrated Assessment
Climate Change
Water-Energy-Land Nexus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,377
5,720
0.775
* Total Citation Counts Rankings
Ranking Based On Selection :19
Earth and Planetary Sciences
Climate Change
Renewable Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,261
4,052
0.558
* Total Citation Counts Rankings
Ranking Based On Selection :20
Water-Energy-Food nexus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,192
2,945
0.409
* Total Citation Counts Rankings
Ranking Based On Selection :21
Desalination
water treatment
environmental engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,130
7,000
0.982
* Total Citation Counts Rankings
Ranking Based On Selection :22
Air Pollution. Ecophysiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,787
4,084
0.602
* Total Citation Counts Rankings
Ranking Based On Selection :23
Membranes
Wastewater treatment
Environmental science
Food Packaging
Waste to Energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,697
6,636
0.991
* Total Citation Counts Rankings
Ranking Based On Selection :24
water desalination
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,505
2,330
0.358
* Total Citation Counts Rankings
Ranking Based On Selection :25
Environmental Engineering
Water Treatment
Desalination
Circular Economy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,334
4,667
0.737
* Total Citation Counts Rankings
Rankings
3,473
1
1
Ranking Based On Selection: 1
Gordon Mckay
Hamad Bin Khalifa University
Ar-Rayyan, Qatar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
92,638
38,499
0.416
Water Treatment
Waste to Value-added Products
* Total Citation Counts Rankings
Rankings
4,061
9
2
Ranking Based On Selection: 2
Mika Sillanpää
King Saud University
Riyadh, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,841
60,956
0.718
Environmental Engineering
Green Chemistry
Chemical Engineering
Water Treatment
Environmental Analysis
* Total Citation Counts Rankings
Rankings
31,191
12
4
Ranking Based On Selection: 3
Simon Judd
Qatar University
Katar, Qatar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,567
8,179
0.347
Membrane technology for water and wastewater treatment
* Total Citation Counts Rankings
Rankings
46,126
116
12
Ranking Based On Selection: 4
Ma Barakat
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,775
11,884
0.669
Environmental Sciences
* Total Citation Counts Rankings
Rankings
49,617
1
1
Ranking Based On Selection: 5
Yousser Mohammad
Tishreen University
Kaohsiung City, Syria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,857
5,793
0.344
chronic respirotery disease
Air pollution
Health programing
* Total Citation Counts Rankings
Rankings
51,001
141
62
Ranking Based On Selection: 6
Ghaffour Noreddine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,508
11,905
0.721
Water desalination
Renewable energy
Desalination economics
Innovative desalination technologies
* Total Citation Counts Rankings
Rankings
67,499
46
18
Ranking Based On Selection: 7
Mohammad A Al Ghouti
Qatar University
Katar, Qatar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,353
10,297
0.771
Analytical and environmental chemistry
Environmental Remediation
Validation method in analytical chemistry
Remediation
Adsor
* Total Citation Counts Rankings
Rankings
72,630
48
19
Ranking Based On Selection: 8
Juha M Alatalo
Qatar University
Katar, Qatar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,602
8,249
0.655
Climate change biology
climate change ecology
climate change vulnerability
arctic ecology
ITEX
* Total Citation Counts Rankings
Rankings
77,192
27
19
Ranking Based On Selection: 9
Mutasem El Fadel
American University of Beirut
Beirut, Lebanon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,991
4,942
0.412
Waste management
Water resources management
Air pollution control
Climate change and sustainable development
Environmental i
* Total Citation Counts Rankings
Rankings
77,448
209
18
Ranking Based On Selection: 10
Oves M
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,954
8,609
0.720
Antimicrobial Agents
Nanoformulation
Silver nanoparticles
Phosphate solubilization
Biofilm
* Total Citation Counts Rankings
Rankings
87,648
240
28
Ranking Based On Selection: 11
Iqbal Ismail
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,783
8,391
0.778
Electrochemistry
Physical Chemistry
Nanotechnology
Renewable Energy
Environmental Science
* Total Citation Counts Rankings
Rankings
91,344
124
10
Ranking Based On Selection: 12
Mokhtar Ibrahim Yousef
Alexandria University
Alexandria, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,416
3,759
0.361
Environmental Science
Reproductive Toxicology
Endocrine Disruption
Hepatotoxicity
Drug Toxicity
* Total Citation Counts Rankings
Rankings
113,401
317
109
Ranking Based On Selection: 13
Pascal E Saikaly
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,617
6,499
0.754
Environmental Biotechnology
Microbial Electrochemical Systems
Aerobic Granular Sludge
Anammox
Resource Recovery
* Total Citation Counts Rankings
Rankings
113,853
322
113
Ranking Based On Selection: 14
Muhammad Tariq Khan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,588
5,390
0.628
Water Treatment
Seawater Desalination
Wastewater Reuse
Reverse Osmosis
* Total Citation Counts Rankings
Rankings
118,692
338
43
Ranking Based On Selection: 15
Mansour Almazroui
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,276
6,634
0.802
Climate
Climate Change
Impact of Climate Change in water resources and environment
climate extremes
* Total Citation Counts Rankings
Rankings
123,019
355
46
Ranking Based On Selection: 16
Rajeev Kumar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,010
5,491
0.686
Environmental Science
* Total Citation Counts Rankings
Rankings
133,959
24
1
Ranking Based On Selection: 17
Hakim Lounici
Université de Bouira
Bouïra, Algeria
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,415
3,460
0.467
Génie de l'Environnement
Génie des Procédés
Chimie de l'Environnement
* Total Citation Counts Rankings
Rankings
134,606
395
1
Ranking Based On Selection: 18
Mohamad Hejazi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,377
5,720
0.775
Integrated Assessment
Climate Change
Water-Energy-Land Nexus
* Total Citation Counts Rankings
Rankings
136,970
33
21
Ranking Based On Selection: 19
Yassine Charabi
Sultan Qaboos University
Muscat, Oman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,261
4,052
0.558
Earth and Planetary Sciences
Climate Change
Renewable Energy
* Total Citation Counts Rankings
Rankings
138,385
112
21
Ranking Based On Selection: 20
Zhaoyang Liu
Hamad Bin Khalifa University
Ar-Rayyan, Qatar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,192
2,945
0.409
Water-Energy-Food nexus
* Total Citation Counts Rankings
Rankings
139,626
113
2
Ranking Based On Selection: 21
Khaled Elsaid
Texas A&M University at Qatar
Ar-Rayyan, Qatar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,130
7,000
0.982
Desalination
water treatment
environmental engineering
* Total Citation Counts Rankings
Rankings
147,116
443
59
Ranking Based On Selection: 22
Ibrahim Hassan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,787
4,084
0.602
Air Pollution. Ecophysiology
* Total Citation Counts Rankings
Rankings
149,166
166
48
Ranking Based On Selection: 23
Rambabu K
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,697
6,636
0.991
Membranes
Wastewater treatment
Environmental science
Food Packaging
Waste to Energy
* Total Citation Counts Rankings
Rankings
153,740
475
6
Ranking Based On Selection: 24
Hisham El Dessouky
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,505
2,330
0.358
* Total Citation Counts Rankings
Rankings
158,003
38
7
Ranking Based On Selection: 25
Mohamed Chaker Ncibi
Mohammed VI Polytechnic University
Ben Guerir, Morocco
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,334
4,667
0.737
Environmental Engineering
Water Treatment
Desalination
Circular Economy