Citation Rankings
Highly Cited Researchers
ASEAN Highly Cited Researchers Citation Engineering & Technology Engineering & 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
Environmental engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,147
23,275
0.595
* Total Citation Counts Rankings
Ranking Based On Selection :2
Environmental engineering
water
reuse
solid waste
recycling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,257
16,689
0.436
* Total Citation Counts Rankings
Ranking Based On Selection :3
Environmental microbiology and biotechnology
MBR
Biological wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,843
19,321
0.524
* Total Citation Counts Rankings
Ranking Based On Selection :4
Pyrolysis
Microwave Pyrolysis
Waste and Biomass Recovery
Water & Wastewater Treatment
Biochar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,348
24,730
0.939
* Total Citation Counts Rankings
Ranking Based On Selection :5
Numerical Weather Prediction
Data Assimilation
Climate Science
Reanalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,576
10,957
0.428
* Total Citation Counts Rankings
Ranking Based On Selection :6
Cardiovascular diseases
Air pollution
Meta-analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,116
19,688
0.784
* Total Citation Counts Rankings
Ranking Based On Selection :7
Hydrogen
Catalysis
Reforming
Photocatalysis
Fischer-Tropsch synthesis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,257
23,773
0.980
* Total Citation Counts Rankings
Ranking Based On Selection :8
Environmental Engineering
Environmental Science
Chemical Engineering
Nanomaterials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,300
14,162
0.608
* Total Citation Counts Rankings
Ranking Based On Selection :9
Environmental governance
climate change adaptation
sustainability science
knowledge systems
narratives
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,965
9,257
0.403
* Total Citation Counts Rankings
Ranking Based On Selection :10
Water resources
Climate Change
Statistical hydrology
Groundwater hydrology
Hydrological
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,606
18,660
0.864
* Total Citation Counts Rankings
Ranking Based On Selection :11
Water Treatment Technology
Water Security Management
Waste Utilization
Water-Food Nexus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,563
10,095
0.544
* Total Citation Counts Rankings
Ranking Based On Selection :12
Environmental Engineering
Membrane Separation
Environmental Nanotechnology
Water and Desalination
Environmental Materials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,018
6,014
0.353
* Total Citation Counts Rankings
Ranking Based On Selection :13
Water Resources
Optimization Model
Dam Operation
Artificial Neural network
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,786
13,415
0.799
* Total Citation Counts Rankings
Ranking Based On Selection :14
environmental engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,500
8,133
0.493
* Total Citation Counts Rankings
Ranking Based On Selection :15
wastewater treatment
recreational water quality
public health
environmental microbiology
biofilms
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,235
7,397
0.486
* Total Citation Counts Rankings
Ranking Based On Selection :16
Microbial fuel cells
Photocatalysis
Adsorption
Phytoremediation
Wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,937
6,846
0.458
* Total Citation Counts Rankings
Ranking Based On Selection :17
Bioprocessing
Biorefinery
Food processing
Microalgae technology
Sustainability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,407
14,188
0.985
* Total Citation Counts Rankings
Ranking Based On Selection :18
Environmental Engineering
Water and Wastewater Treatment
Solid Waste Management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,256
6,071
0.426
* Total Citation Counts Rankings
Ranking Based On Selection :19
Supercritical Fluid Technology
wastewater and water treatment
food technology
polymer
clinical solid wastes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,117
7,562
0.577
* Total Citation Counts Rankings
Ranking Based On Selection :20
Environmental Science and Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,224
11,716
0.958
* Total Citation Counts Rankings
Ranking Based On Selection :21
Environmental Engineering
membrane technology
solid waste managment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,960
5,566
0.465
* Total Citation Counts Rankings
Ranking Based On Selection :22
Bioprocessing and Biomanufacturing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,390
6,213
0.545
* Total Citation Counts Rankings
Ranking Based On Selection :23
Water and Wastewater Treatment
Water Reuse
Membrane Technology
Green Infrastructure
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,351
4,379
0.386
* Total Citation Counts Rankings
Ranking Based On Selection :24
Building science
energy
indoor air quality
ventilation
HVAC
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,241
7,991
0.711
* Total Citation Counts Rankings
Ranking Based On Selection :25
Environment
Optimization
Applied Math
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,235
3,817
0.340
* Total Citation Counts Rankings
Rankings
14,266
17
5
Ranking Based On Selection: 1
Hamidi Abdul Aziz
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,147
23,275
0.595
Environmental engineering
* Total Citation Counts Rankings
Rankings
14,803
86
30
Ranking Based On Selection: 2
Shane A Snyder
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,257
16,689
0.436
Environmental engineering
water
reuse
solid waste
recycling
* Total Citation Counts Rankings
Rankings
15,685
89
32
Ranking Based On Selection: 3
Yu Liu
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,843
19,321
0.524
Environmental microbiology and biotechnology
MBR
Biological wastewater treatment
* Total Citation Counts Rankings
Rankings
26,408
34
1
Ranking Based On Selection: 4
Su Shiung Lam 蓝世雄
Universiti Malaysia Terengganu
Kuala Terengganu, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,348
24,730
0.939
Pyrolysis
Microwave Pyrolysis
Waste and Biomass Recovery
Water & Wastewater Treatment
Biochar
* Total Citation Counts Rankings
Rankings
27,591
170
1
Ranking Based On Selection: 5
Dale Barker
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,576
10,957
0.428
Numerical Weather Prediction
Data Assimilation
Climate Science
Reanalysis
* Total Citation Counts Rankings
Rankings
28,366
182
93
Ranking Based On Selection: 6
Wilson Tam
National University of Singapore
Queenstown, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,116
19,688
0.784
Cardiovascular diseases
Air pollution
Meta-analysis
* Total Citation Counts Rankings
Rankings
29,877
11
2
Ranking Based On Selection: 7
Dai Viet N Vo
Nguyen Tat Thanh University
Ho Chi Minh City, Vietnam
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,257
23,773
0.980
Hydrogen
Catalysis
Reforming
Photocatalysis
Fischer-Tropsch synthesis
* Total Citation Counts Rankings
Rankings
31,688
203
62
Ranking Based On Selection: 8
Teik Thye Lim
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,300
14,162
0.608
Environmental Engineering
Environmental Science
Chemical Engineering
Nanomaterials
* Total Citation Counts Rankings
Rankings
32,380
21
1
Ranking Based On Selection: 9
Louis Lebel
Chiang Mai University
Chiang Mai, Thailand
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,965
9,257
0.403
Environmental governance
climate change adaptation
sustainability science
knowledge systems
narratives
* Total Citation Counts Rankings
Rankings
35,236
50
3
Ranking Based On Selection: 10
Shamsuddin Shahid
Universiti Teknologi Malaysia
Johor Bahru, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,606
18,660
0.864
Water resources
Climate Change
Statistical hydrology
Groundwater hydrology
Hydrological
* Total Citation Counts Rankings
Rankings
43,487
79
13
Ranking Based On Selection: 11
Keng Yuen Foo
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,563
10,095
0.544
Water Treatment Technology
Water Security Management
Waste Utilization
Water-Food Nexus
* Total Citation Counts Rankings
Rankings
48,990
329
104
Ranking Based On Selection: 12
Darren Delai Sun
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,018
6,014
0.353
Environmental Engineering
Membrane Separation
Environmental Nanotechnology
Water and Desalination
Environmental Materials
* Total Citation Counts Rankings
Rankings
49,898
96
13
Ranking Based On Selection: 13
Ahmed El Shafie
University of Malaya
Kuala Lumpur, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,786
13,415
0.799
Water Resources
Optimization Model
Dam Operation
Artificial Neural network
* Total Citation Counts Rankings
Rankings
51,030
337
108
Ranking Based On Selection: 14
Wunjern Ng
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,500
8,133
0.493
environmental engineering
* Total Citation Counts Rankings
Rankings
56,784
366
116
Ranking Based On Selection: 15
Stefan Wuertz
Nanyang Technological University
Jurong West, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,235
7,397
0.486
wastewater treatment
recreational water quality
public health
environmental microbiology
biofilms
* Total Citation Counts Rankings
Rankings
58,281
50
1
Ranking Based On Selection: 16
Sandhya Babel
Thammasat University
Bangkok, Thailand
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,937
6,846
0.458
Microbial fuel cells
Photocatalysis
Adsorption
Phytoremediation
Wastewater treatment
* Total Citation Counts Rankings
Rankings
61,075
131
3
Ranking Based On Selection: 17
Kit Wayne Chew
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,407
14,188
0.985
Bioprocessing
Biorefinery
Food processing
Microalgae technology
Sustainability
* Total Citation Counts Rankings
Rankings
61,925
4
2
Ranking Based On Selection: 18
Mohamed Hasnain Isa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,256
6,071
0.426
Environmental Engineering
Water and Wastewater Treatment
Solid Waste Management
* Total Citation Counts Rankings
Rankings
69,042
159
26
Ranking Based On Selection: 19
Mohd Omar AB Kadir
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,117
7,562
0.577
Supercritical Fluid Technology
wastewater and water treatment
food technology
polymer
clinical solid wastes
* Total Citation Counts Rankings
Rankings
75,355
178
3
Ranking Based On Selection: 20
Jun Wei Lim
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,224
11,716
0.958
Environmental Science and Engineering
* Total Citation Counts Rankings
Rankings
77,398
75
1
Ranking Based On Selection: 21
Visvanathan C
Asian Institute of Technology Thailand
Klong Luang, Thailand
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,960
5,566
0.465
Environmental Engineering
membrane technology
solid waste managment
* Total Citation Counts Rankings
Rankings
82,112
207
40
Ranking Based On Selection: 22
Arbakariya B Ariff
Universiti Putra Malaysia
Seri Kembangan, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,390
6,213
0.545
Bioprocessing and Biomanufacturing
* Total Citation Counts Rankings
Rankings
82,464
549
287
Ranking Based On Selection: 23
Say Leong Ong
National University of Singapore
Queenstown, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,351
4,379
0.386
Water and Wastewater Treatment
Water Reuse
Membrane Technology
Green Infrastructure
* Total Citation Counts Rankings
Rankings
83,403
554
290
Ranking Based On Selection: 24
Chandra Sekhar
National University of Singapore
Queenstown, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,241
7,991
0.711
Building science
energy
indoor air quality
ventilation
HVAC
* Total Citation Counts Rankings
Rankings
83,453
555
291
Ranking Based On Selection: 25
Christine A Shoemaker
National University of Singapore
Queenstown, Singapore
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,235
3,817
0.340
Environment
Optimization
Applied Math