Citation Rankings
Highly Cited Researchers
Engineering & Technology / Environmental Science & Engineering Highly Cited Researchers Citation Rankings 2025
The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the 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
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,992
5,250
0.876
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Electrochemical degradation
OER catalysis
Advanced Oxidation Processes
Environmental nanotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,102
2,027
0.964
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Satellite remote sensing
South Asian Smog
Air Quality
Climate Change
DOAS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,091
1,773
0.848
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Environmental Sciences
Microbiology
Drinking Water
Pesticides
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,947
1,318
0.677
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Anaerobic Treatment Technology
Biogas Production
Microalgae Production
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,899
1,699
0.895
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Water Resources Engineering
Water Resources Management
Construction Project Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,729
1,266
0.732
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Environmental virology
Infectious Diseases
Epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,663
1,433
0.862
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Water Quality Engineering
Wastewater Treatment
Waste Management
Nanotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,633
1,539
0.942
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Air Quality Management
Renewable Energy
Catalytic Pyrolysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,554
1,502
0.967
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Environmental sciences
water resources management
solid waste management EIA
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
972
614
0.632
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Renewable & Sustainable Energy Systems
Climate Change
Carbon capture & Utilization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
928
853
0.919
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Hydro-climate Extremes
Machine Learning
Deep Learning
Bayesian Statistics
Spatial Statistics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
924
843
0.912
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Energy saving
Energy efficiency
IEQ
Building Energy Simulations
Climate change adaptation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
836
824
0.986
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Environmental chemistry
partitioning
diffusion & toxicity models
passive sampling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
715
466
0.652
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Energy policy
Hybrid Energy Systems
Climate Change
Optimization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
648
635
0.980
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Affordable Housing
Sustainable Urban Development
Urban Environmental Management
Corporate Social Responsibility
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
600
373
0.622
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Water and wastewater treatment
Biosorbent
Heavy metals
Nanoparticles
Phosphatic fertilizer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
556
542
0.975
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Development Studies
Climate Change
Natural Hazards
Disasters' Risk Reduction
Sustainability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
499
496
0.994
* Total Citation Counts Rankings
Ranking Based On Selection: 19
air pollution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
405
400
0.988
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Water and Wastewater Treatment
Anaerobic Digestion
Fermentation
Microbial Protein Production
SCP
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
378
365
0.966
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
353
346
0.980
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Climate Change Mitigation
Energy Conservation
Carbon dioxide Capture
Metal Organic Frameworks
Advanced Materials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
349
328
0.940
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Cartography
Environmental Science
GIS
Ecology
Agronomy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
245
120
0.490
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Environmental sciences
climate change
biochar
energy from waste
fuel cell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
202
199
0.985
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Land Surface Modeling
Climate Change
Deep Learning
Biogeochemistry
Hydrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
188
185
0.984
* Total Citation Counts Rankings
Rankings
171,580
326
15
Ranking Based On Selection: 1
Muhammad Arshad
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,992
5,250
0.876
Environmental Science
* Total Citation Counts Rankings
Rankings
425,043
1,444
78
Ranking Based On Selection: 2
Waqas Qamar Zaman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,102
2,027
0.964
Electrochemical degradation
OER catalysis
Advanced Oxidation Processes
Environmental nanotechnology
* Total Citation Counts Rankings
Rankings
426,709
1,451
79
Ranking Based On Selection: 3
Muhammad Fahim Khokhar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,091
1,773
0.848
Satellite remote sensing
South Asian Smog
Air Quality
Climate Change
DOAS
* Total Citation Counts Rankings
Rankings
449,187
1,573
85
Ranking Based On Selection: 4
Imran Hashmi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,947
1,318
0.677
Environmental Sciences
Microbiology
Drinking Water
Pesticides
* Total Citation Counts Rankings
Rankings
457,150
1,616
88
Ranking Based On Selection: 5
Zeshan|Dr Zeshan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,899
1,699
0.895
Anaerobic Treatment Technology
Biogas Production
Microalgae Production
* Total Citation Counts Rankings
Rankings
487,615
1,803
96
Ranking Based On Selection: 6
Hamza Farooq Gabriel
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,729
1,266
0.732
Water Resources Engineering
Water Resources Management
Construction Project Management
* Total Citation Counts Rankings
Rankings
500,638
1,890
103
Ranking Based On Selection: 7
Tahir Ahmad
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,663
1,433
0.862
Environmental virology
Infectious Diseases
Epidemiology
* Total Citation Counts Rankings
Rankings
506,659
1,921
106
Ranking Based On Selection: 8
Musharib Khan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,633
1,539
0.942
Water Quality Engineering
Wastewater Treatment
Waste Management
Nanotechnology
* Total Citation Counts Rankings
Rankings
523,432
2,018
108
Ranking Based On Selection: 9
Muhammad Zeeshan Ali Khan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,554
1,502
0.967
Air Quality Management
Renewable Energy
Catalytic Pyrolysis
* Total Citation Counts Rankings
Rankings
688,717
3,124
159
Ranking Based On Selection: 10
Muhammad Anwar Baig
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
972
614
0.632
Environmental sciences
water resources management
solid waste management EIA
* Total Citation Counts Rankings
Rankings
705,116
3,253
167
Ranking Based On Selection: 11
Irfan Ahmad Gondal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
928
853
0.919
Renewable & Sustainable Energy Systems
Climate Change
Carbon capture & Utilization
* Total Citation Counts Rankings
Rankings
706,660
3,266
170
Ranking Based On Selection: 12
Techn Firdos Khan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
924
843
0.912
Hydro-climate Extremes
Machine Learning
Deep Learning
Bayesian Statistics
Spatial Statistics
* Total Citation Counts Rankings
Rankings
742,600
3,519
176
Ranking Based On Selection: 13
Waqas Khalid
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
836
824
0.986
Energy saving
Energy efficiency
IEQ
Building Energy Simulations
Climate change adaptation
* Total Citation Counts Rankings
Rankings
797,247
3,941
201
Ranking Based On Selection: 14
Deedar Nabi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
715
466
0.652
Environmental chemistry
partitioning
diffusion & toxicity models
passive sampling
* Total Citation Counts Rankings
Rankings
830,290
4,206
211
Ranking Based On Selection: 15
Abdul Kashif Janjua
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
648
635
0.980
Energy policy
Hybrid Energy Systems
Climate Change
Optimization
* Total Citation Counts Rankings
Rankings
855,806
4,424
223
Ranking Based On Selection: 16
Malik Asghar Naeem
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
600
373
0.622
Affordable Housing
Sustainable Urban Development
Urban Environmental Management
Corporate Social Responsibility
* Total Citation Counts Rankings
Rankings
879,914
4,635
234
Ranking Based On Selection: 17
Muhammad Ali Inam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
556
542
0.975
Water and wastewater treatment
Biosorbent
Heavy metals
Nanoparticles
Phosphatic fertilizer
* Total Citation Counts Rankings
Rankings
918,373
4,962
253
Ranking Based On Selection: 18
Umer Khayyam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
499
496
0.994
Development Studies
Climate Change
Natural Hazards
Disasters' Risk Reduction
Sustainability
* Total Citation Counts Rankings
Rankings
1,003,246
85
23
Ranking Based On Selection: 19
Jargalsaikhan Galsuren
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
405
400
0.988
* Total Citation Counts Rankings
Rankings
1,030,871
5,951
321
Ranking Based On Selection: 20
Hafiz Muhammad Aamir Shahzad
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
378
365
0.966
Water and Wastewater Treatment
Anaerobic Digestion
Fermentation
Microbial Protein Production
SCP
* Total Citation Counts Rankings
Rankings
1,057,930
6,177
342
Ranking Based On Selection: 21
Aneela Iqbal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
353
346
0.980
Environmental Science
* Total Citation Counts Rankings
Rankings
1,062,687
6,224
344
Ranking Based On Selection: 22
Aisha Asghar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
349
328
0.940
Climate Change Mitigation
Energy Conservation
Carbon dioxide Capture
Metal Organic Frameworks
Advanced Materials
* Total Citation Counts Rankings
Rankings
1,209,822
10,211
166
Ranking Based On Selection: 23
Vyacheslav Bogdanets|Vjacheslav Bogdanets, V Bogdanets, V Bohdanets
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
245
120
0.490
Cartography
Environmental Science
GIS
Ecology
Agronomy
* Total Citation Counts Rankings
Rankings
1,290,383
8,937
453
Ranking Based On Selection: 24
Saira Kanwal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
202
199
0.985
Environmental sciences
climate change
biochar
energy from waste
fuel cell
* Total Citation Counts Rankings
Rankings
1,320,773
9,312
478
Ranking Based On Selection: 25
Muhammad Umair
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
188
185
0.984
Land Surface Modeling
Climate Change
Deep Learning
Biogeochemistry
Hydrology