World Scientist and University Rankings 2025
China Engineering & Technology 1.318 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 30, 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
Environmental Soil Science & Biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
163
719
96,642
* Total H IndexRankings
Ranking Based On Selection: 2
Water Treatment Processes
Environmental Nanotechnology
Advanced Oxidation
Membrane Technology
Metrics
H-Index
i10 Index
Citation Counts
133
800
70,499
* Total H IndexRankings
Ranking Based On Selection: 3
Groundwater
Hydrogeology
Hydrology
Earth Sciences
Metrics
H-Index
i10 Index
Citation Counts
127
1,089
76,844
* Total H IndexRankings
Ranking Based On Selection: 4
Glacier energy and mass balance
Climate change at high altitude region
Glacier hydology
Metrics
H-Index
i10 Index
Citation Counts
125
1,218
83,520
* Total H IndexRankings
Ranking Based On Selection: 5
environmental science
chemical engineering
water treatment
catalysis
Metrics
H-Index
i10 Index
Citation Counts
123
580
53,657
* Total H IndexRankings
Ranking Based On Selection: 6
Hydrological modeling and prediction
Surface water and groundwater interaction
Hydrological response to climate change
Metrics
H-Index
i10 Index
Citation Counts
123
999
64,993
* Total H IndexRankings
Ranking Based On Selection: 7
Environmental analytical chemistry
Environmental monitoring
the fate of pollutants
Metrics
H-Index
i10 Index
Citation Counts
119
990
69,651
* Total H IndexRankings
Ranking Based On Selection: 8
Water Treatment
Environmental Engineering
Environmental Nanotechnology
Bioremediation
Metrics
H-Index
i10 Index
Citation Counts
115
431
40,607
* Total H IndexRankings
Ranking Based On Selection: 9
Metrics
H-Index
i10 Index
Citation Counts
112
525
45,580
* Total H IndexRankings
Ranking Based On Selection: 10
Energy storage and conversion
Batteries
Li-S battery
metal air battery
Na ion battery
Metrics
H-Index
i10 Index
Citation Counts
110
451
40,491
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
* Total H IndexRankings
Ranking Based On Selection: 11
Emerging Contaminants
Metrics
H-Index
i10 Index
Citation Counts
110
431
41,676
* Total H IndexRankings
Ranking Based On Selection: 12
Envrionmental Biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
110
488
53,658
* Total H IndexRankings
Ranking Based On Selection: 13
Climate Change Economics
Ecological Economics
Emission Data Accounting
Metrics
H-Index
i10 Index
Citation Counts
109
276
42,845
* Total H IndexRankings
Ranking Based On Selection: 14
Energy and environmental policy
Metrics
H-Index
i10 Index
Citation Counts
109
492
47,087
* Total H IndexRankings
Ranking Based On Selection: 15
Disinfection and DBPs
DBP precursors and characterization
nitrosamines
NOM
T&O
Metrics
H-Index
i10 Index
Citation Counts
108
769
48,679
* Total H IndexRankings
Ranking Based On Selection: 16
Environmental Engineering
Metrics
H-Index
i10 Index
Citation Counts
106
418
41,338
* Total H IndexRankings
Ranking Based On Selection: 17
Soil remediation
Biochar
Waste management
Soil CN cycling
Water quality
Metrics
H-Index
i10 Index
Citation Counts
103
467
40,952
* Total H IndexRankings
Ranking Based On Selection: 18
emission
atmospheric chemistry
health impacts
mercury
Metrics
H-Index
i10 Index
Citation Counts
103
373
36,543
* Total H IndexRankings
Ranking Based On Selection: 19
Disinfection byproducts
emerging contaminants
water treatment
water chemistry
Metrics
H-Index
i10 Index
Citation Counts
100
431
38,208
* Total H IndexRankings
Ranking Based On Selection: 20
POPs
Emerging Contaminants
PFAS
PPCPs
Metrics
H-Index
i10 Index
Citation Counts
99
333
32,782
* Total H IndexRankings
Ranking Based On Selection: 21
Water treatment
Metrics
H-Index
i10 Index
Citation Counts
99
381
33,071
* Total H IndexRankings
Ranking Based On Selection: 22
Atmosperic Environment
Cryosphere
Climate Change
Metrics
H-Index
i10 Index
Citation Counts
97
614
41,346
* Total H IndexRankings
Ranking Based On Selection: 23
Chemistry
Environmental Sciences & Ecology
Toxicology
Metrics
H-Index
i10 Index
Citation Counts
96
500
32,883
* Total H IndexRankings
Ranking Based On Selection: 24
environmental engineering
water treatment
environmental nanotechnology
adsorption
advanced oxidation processes
Metrics
H-Index
i10 Index
Citation Counts
93
281
30,706
* Total H IndexRankings
Ranking Based On Selection: 25
Nitrogen deposition and cycling
Metrics
H-Index
i10 Index
Citation Counts
89
356
38,474
Yong-Guan Zhu
Metrics
H-Index
i10-Index
Citation Counts
163
719
96,642
Environmental Soil Science & Biogeochemistry
Jun Ma 马军
Harbin Institute of Technology
Harbin, China
Metrics
H-Index
i10-Index
Citation Counts
133
800
70,499
Water Treatment Processes
Environmental Nanotechnology
Advanced Oxidation
Membrane Technology
Wang Jinsheng（王金生）
Beijing Normal University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
127
1,089
76,844
Groundwater
Hydrogeology
Hydrology
Earth Sciences
Shenghai Li （李生海）
Metrics
H-Index
i10-Index
Citation Counts
125
1,218
83,520
Glacier energy and mass balance
Climate change at high altitude region
Glacier hydology
Xie Quan
Dalian University of Technology
Dalian, China
Metrics
H-Index
i10-Index
Citation Counts
123
580
53,657
environmental science
chemical engineering
water treatment
catalysis
Hydrological modeling and prediction
Surface water and groundwater interaction
Hydrological response to climate change
Chen ling
Tongji University
Shanghai, China
Metrics
H-Index
i10-Index
Citation Counts
119
990
69,651
Environmental analytical chemistry
Environmental monitoring
the fate of pollutants
Shenglian Luo
Hunan University
Changsha, China
Metrics
H-Index
i10-Index
Citation Counts
115
431
40,607
Water Treatment
Environmental Engineering
Environmental Nanotechnology
Bioremediation
Renjie Chen
Beijing Institute of Technology
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
110
451
40,491
Energy storage and conversion
Batteries
Li-S battery
metal air battery
Na ion battery
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Emerging Contaminants
Lena Q Ma
Zhejiang University
Hangzhou, China
Metrics
H-Index
i10-Index
Citation Counts
110
488
53,658
Envrionmental Biogeochemistry
Dabo Guan 关大博
Tsinghua University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
109
276
42,845
Climate Change Economics
Ecological Economics
Emission Data Accounting
Yi-Ming Wei 魏一鸣
Beijing Institute of Technology
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
109
492
47,087
Energy and environmental policy
Chao Chen
Tsinghua University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
108
769
48,679
Disinfection and DBPs
DBP precursors and characterization
nitrosamines
NOM
T&O
Junhua Li
Tsinghua University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
106
418
41,338
Environmental Engineering
Hailong Wang
Foshan University
Foshan, China
Metrics
H-Index
i10-Index
Citation Counts
103
467
40,952
Soil remediation
Biochar
Waste management
Soil CN cycling
Water quality
wang shuxiao
Tsinghua University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
103
373
36,543
emission
atmospheric chemistry
health impacts
mercury
Xin Yang
Sun Yat Sen University
Guangzhou, China
Metrics
H-Index
i10-Index
Citation Counts
100
431
38,208
Disinfection byproducts
emerging contaminants
water treatment
water chemistry
Jun Huang
Tsinghua University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
99
333
32,782
POPs
Emerging Contaminants
PFAS
PPCPs
Huijuan Liu
Metrics
H-Index
i10-Index
Citation Counts
99
381
33,071
Shichang Kang
Metrics
H-Index
i10-Index
Citation Counts
97
614
41,346
Atmosperic Environment
Cryosphere
Climate Change
Weiping Liu
Zhejiang University
Hangzhou, China
Metrics
H-Index
i10-Index
Citation Counts
96
500
32,883
Chemistry
Environmental Sciences & Ecology
Toxicology
bingcai pan
Nanjing University
Nanjing, China
Metrics
H-Index
i10-Index
Citation Counts
93
281
30,706
environmental engineering
water treatment
environmental nanotechnology
adsorption
advanced oxidation processes
Xuejun Liu
China Agricultural University
Beijing, China
Metrics
H-Index
i10-Index
Citation Counts
89
356
38,474
Nitrogen deposition and cycling