Citation Rankings
Highly Cited Researchers
Engineering & Technology / Environmental Science & Engineering Highly Cited Researchers 30 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list 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 engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,623
23,005
0.553
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Water Treatment Technology
Water Security Management
Waste Utilization
Water-Food Nexus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,448
9,083
0.467
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Supercritical Fluid Technology
wastewater and water treatment
food technology
polymer
clinical solid wastes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,681
6,877
0.503
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Water Resources Management
Flood Management
Environmental Management
Climatology
Ecotourism
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,312
3,207
0.604
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Zwitterionic Adsorbent
Wastewater Treatment
Membrane separation
Adsorption
Water shut-off
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,157
2,757
0.535
* Total Citation Counts Rankings
Ranking Based On Selection: 6
water and wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,145
1,926
0.374
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Wastewater treatment
Supercritical Carbon Dioxide
Solid waste Management
Renewable energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,099
3,764
0.738
* Total Citation Counts Rankings
Ranking Based On Selection: 8
wastewater treatment
life cycle assessment (LCA)
phytoremediation
phycoremediation
intelligent systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,365
2,068
0.474
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Water Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,119
2,113
0.513
* Total Citation Counts Rankings
Ranking Based On Selection: 10
green products
environmental management system
environmental footprint
environmental risk management
ISO 14001
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,739
3,144
0.841
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Landfill Leachate
Wastewater
Adsorption
Waste Treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,244
1,874
0.835
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Water and wastewater treatment
waster and wastewater quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,755
1,425
0.812
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Environmental science
catalysis
mesoporous titania
Advance material
mesoporous material
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,577
956
0.606
* Total Citation Counts Rankings
Ranking Based On Selection: 14
climate change reporting
responsible innovation
sustainable business performance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,494
1,161
0.777
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Environmental Science and Technology
PM2.5
Atmospheric Chemistry and Physics
Safety Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,380
964
0.699
* Total Citation Counts Rankings
Ranking Based On Selection: 16
water Treatment
Wastewater Treatment
Fate and Transport
Water Quality Modeling
Nanoparticles
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,355
865
0.638
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Water and wastewater treatment
Activated carbon production
adsorption
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,332
588
0.441
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Environmental Engineering
Air Pollution
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,272
765
0.601
* Total Citation Counts Rankings
Ranking Based On Selection: 19
waste management
odour pollution
anaerobic digestion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,229
769
0.626
* Total Citation Counts Rankings
Ranking Based On Selection: 20
water resources engineering
remote sensing
GIS
Satellite systems design
structure design
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,018
597
0.586
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Wastewater treatment
activated sludge
adsorption
bioremediation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
895
666
0.744
* Total Citation Counts Rankings
Ranking Based On Selection: 22
adsorption
synthesis materials
environmental health
heavy metal
waste water treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
862
491
0.570
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
148
51
0.345
* Total Citation Counts Rankings
Ranking Based On Selection: 24
environmental engineering
environmental science
agricultural engineering
aquatic science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
102
84
0.824
* Total Citation Counts Rankings
Ranking Based On Selection: 25
environmental engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
90
60
0.667
* Total Citation Counts Rankings
Rankings
13,746
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
41,623
23,005
0.553
Environmental engineering
* Total Citation Counts Rankings
Rankings
43,058
79
13
Ranking Based On Selection: 2
Keng Yuen Foo
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,448
9,083
0.467
Water Treatment Technology
Water Security Management
Waste Utilization
Water-Food Nexus
* Total Citation Counts Rankings
Rankings
68,896
161
26
Ranking Based On Selection: 3
Mohd Omar AB Kadir
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,681
6,877
0.503
Supercritical Fluid Technology
wastewater and water treatment
food technology
polymer
clinical solid wastes
* Total Citation Counts Rankings
Rankings
196,920
776
105
Ranking Based On Selection: 4
Ngai Weng Chan
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,312
3,207
0.604
Water Resources Management
Flood Management
Environmental Management
Climatology
Ecotourism
* Total Citation Counts Rankings
Rankings
202,681
809
110
Ranking Based On Selection: 5
Suzylawati Ismail
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,157
2,757
0.535
Zwitterionic Adsorbent
Wastewater Treatment
Membrane separation
Adsorption
Water shut-off
* Total Citation Counts Rankings
Rankings
203,156
811
111
Ranking Based On Selection: 6
Mohd Nordin Adlan
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,145
1,926
0.374
water and wastewater treatment
* Total Citation Counts Rankings
Rankings
204,975
820
113
Ranking Based On Selection: 7
Md Sohrab Hossain
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,099
3,764
0.738
Wastewater treatment
Supercritical Carbon Dioxide
Solid waste Management
Renewable energy
* Total Citation Counts Rankings
Rankings
237,322
1,019
133
Ranking Based On Selection: 8
Norhashimah Morad
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,365
2,068
0.474
wastewater treatment
life cycle assessment (LCA)
phytoremediation
phycoremediation
intelligent systems
* Total Citation Counts Rankings
Rankings
250,399
1,101
140
Ranking Based On Selection: 9
Ismail Abustan
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,119
2,113
0.513
* Total Citation Counts Rankings
Rankings
272,690
1,247
157
Ranking Based On Selection: 10
MISyakir
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,739
3,144
0.841
green products
environmental management system
environmental footprint
environmental risk management
ISO 14001
* Total Citation Counts Rankings
Rankings
411,915
2,409
284
Ranking Based On Selection: 11
Mohamad Anuar Kamaruddin
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,244
1,874
0.835
Landfill Leachate
Wastewater
Adsorption
Waste Treatment
* Total Citation Counts Rankings
Rankings
490,457
3,123
351
Ranking Based On Selection: 12
Puganeshwary Palaniandy
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,755
1,425
0.812
Water and wastewater treatment
waster and wastewater quality
* Total Citation Counts Rankings
Rankings
526,373
3,473
388
Ranking Based On Selection: 13
Nur Farhana Jaafar
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,577
956
0.606
Environmental science
catalysis
mesoporous titania
Advance material
mesoporous material
* Total Citation Counts Rankings
Rankings
544,666
3,678
410
Ranking Based On Selection: 14
SK Ooi
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,494
1,161
0.777
climate change reporting
responsible innovation
sustainable business performance
* Total Citation Counts Rankings
Rankings
572,082
3,935
432
Ranking Based On Selection: 15
Norhaniza Amil
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,380
964
0.699
Environmental Science and Technology
PM2.5
Atmospheric Chemistry and Physics
Safety Science
* Total Citation Counts Rankings
Rankings
578,496
4,008
439
Ranking Based On Selection: 16
Fatehah Mohd Omar
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,355
865
0.638
water Treatment
Wastewater Treatment
Fate and Transport
Water Quality Modeling
Nanoparticles
* Total Citation Counts Rankings
Rankings
584,560
4,074
445
Ranking Based On Selection: 17
Tamer Alslaibi
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,332
588
0.441
Water and wastewater treatment
Activated carbon production
adsorption
* Total Citation Counts Rankings
Rankings
600,675
4,258
461
Ranking Based On Selection: 18
Noor Faizah Fitri Md Yusof
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,272
765
0.601
Environmental Engineering
Air Pollution
* Total Citation Counts Rankings
Rankings
612,728
4,385
471
Ranking Based On Selection: 19
Qamaruz Zaman N
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,229
769
0.626
waste management
odour pollution
anaerobic digestion
* Total Citation Counts Rankings
Rankings
680,319
5,108
551
Ranking Based On Selection: 20
Azlin Md Said
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,018
597
0.586
water resources engineering
remote sensing
GIS
Satellite systems design
structure design
* Total Citation Counts Rankings
Rankings
726,399
5,627
608
Ranking Based On Selection: 21
Si Ling Ng
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
895
666
0.744
Wastewater treatment
activated sludge
adsorption
bioremediation
* Total Citation Counts Rankings
Rankings
739,927
5,772
618
Ranking Based On Selection: 22
Nur Fatien Muhamad Salleh
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
862
491
0.570
adsorption
synthesis materials
environmental health
heavy metal
waste water treatment
* Total Citation Counts Rankings
Rankings
1,441,563
13,649
1,544
Ranking Based On Selection: 23
Nor Habsah Md Sabiani
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
148
51
0.345
Environmental Engineering
* Total Citation Counts Rankings
Rankings
1,593,842
15,628
1,743
Ranking Based On Selection: 24
Harlina, A.
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
102
84
0.824
environmental engineering
environmental science
agricultural engineering
aquatic science
* Total Citation Counts Rankings
Rankings
1,643,469
16,270
1,800
Ranking Based On Selection: 25
Rosnani Alkarimiah
Universiti Sains Malaysia
Penang, Malaysia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
90
60
0.667
environmental engineering