University, Subject, Country, Region, World
Hong Kong 85 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 Feb 01, 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 (870.053) 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 engineering
Membrane technology
Desalination
Water reuse
Metrics
H-Index
i10 Index
Citation Counts
119
349
46,187
* Total H IndexRankings
Ranking Based On Selection: 2
Environmental Biotechnology
Environmental Microbiology
Environmental Microbiome
Biological Wastewater Treatment
Metrics
H-Index
i10 Index
Citation Counts
117
323
45,024
* Total H IndexRankings
Ranking Based On Selection: 3
Environmental Sciences
antibiotic resistance
air pollution and health
environmental geochemistry
phytoremediation
Metrics
H-Index
i10 Index
Citation Counts
102
240
40,185
* Total H IndexRankings
Ranking Based On Selection: 4
Metrics
H-Index
i10 Index
Citation Counts
101
200
40,565
* Total H IndexRankings
Ranking Based On Selection: 5
Metal Ecotoxicology and Biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
93
490
31,768
* Total H IndexRankings
Ranking Based On Selection: 6
Urban Sustainability
Sustainable built environment
Carbon neutrality
Sustainability Science
Metrics
H-Index
i10 Index
Citation Counts
90
256
25,177
* Total H IndexRankings
Ranking Based On Selection: 7
Water quality and water supply
Wastewater treatment
Particle dynamics in water
Metrics
H-Index
i10 Index
Citation Counts
77
251
24,780
* Total H IndexRankings
Ranking Based On Selection: 8
Waste recycling
Eco-friendly concrete
CO2 mineralization
Low carbon cement
Metrics
H-Index
i10 Index
Citation Counts
68
160
14,924
* Total H IndexRankings
Ranking Based On Selection: 9
Environmental epidemiology
air pollution and health
chemical carcinogenesis
Metrics
H-Index
i10 Index
Citation Counts
65
165
13,090
* Total H IndexRankings
Ranking Based On Selection: 10
Hydrogeology
Groundwater
Coastal Hydrogeology
Engineering Geology
HKU-DES
Metrics
H-Index
i10 Index
Citation Counts
57
160
9,198
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* Total H IndexRankings
Ranking Based On Selection: 11
Wastewater Treatment
Microplastics and Nanoplastics
Resource Recovery
Environmental Engineering
Environmental Technology
Metrics
H-Index
i10 Index
Citation Counts
56
186
14,142
* Total H IndexRankings
Ranking Based On Selection: 12
air quality
sensor
instrumentation
public health
Metrics
H-Index
i10 Index
Citation Counts
52
107
10,250
* Total H IndexRankings
Ranking Based On Selection: 13
Enviromental Science and Technology
Material Science of cement composite
Materials and Structure Design of Pavements
Metrics
H-Index
i10 Index
Citation Counts
51
91
7,409
* Total H IndexRankings
Ranking Based On Selection: 14
Water
Membrane
and Energy
Metrics
H-Index
i10 Index
Citation Counts
49
115
8,135
* Total H IndexRankings
Ranking Based On Selection: 15
Air Pollution
Combustion
Fluid Mechanics
Fuel Engineering
Heat Transfer
Metrics
H-Index
i10 Index
Citation Counts
48
126
6,549
* Total H IndexRankings
Ranking Based On Selection: 16
wastewater
sewer
treatment
reuse
Metrics
H-Index
i10 Index
Citation Counts
47
187
6,698
* Total H IndexRankings
Ranking Based On Selection: 17
Environmental Health
Epidemiology
Air Pollution
Metrics
H-Index
i10 Index
Citation Counts
46
82
4,986
* Total H IndexRankings
Ranking Based On Selection: 18
Environmental Analytical Chemistry
Analytical Spectrometry
Metrics
H-Index
i10 Index
Citation Counts
46
109
5,890
* Total H IndexRankings
Ranking Based On Selection: 19
atmospheric chemistry modeling
chemistry-climate interactions
Metrics
H-Index
i10 Index
Citation Counts
45
94
7,192
* Total H IndexRankings
Ranking Based On Selection: 20
Indoor Air Quality
Aerosols
Metrics
H-Index
i10 Index
Citation Counts
45
98
7,568
* Total H IndexRankings
Ranking Based On Selection: 21
Environmental Engineering
Chemical Engineering
Biomass Conversion
Waste Valorization
Metrics
H-Index
i10 Index
Citation Counts
39
55
6,847
* Total H IndexRankings
Ranking Based On Selection: 22
Environmental Health
Life course/lifespan
Healthy cities
Chronic diseases
Cohort studies
Metrics
H-Index
i10 Index
Citation Counts
38
55
5,068
* Total H IndexRankings
Ranking Based On Selection: 23
environmental
microbiology
Chinese medicine
food
health
Metrics
H-Index
i10 Index
Citation Counts
38
77
4,564
* Total H IndexRankings
Ranking Based On Selection: 24
Environmental Engineering
water reuse
membrane technology
Metrics
H-Index
i10 Index
Citation Counts
35
51
5,383
* Total H IndexRankings
Ranking Based On Selection: 25
energy policy
sustainable development
environmental policy
environmental management
Metrics
H-Index
i10 Index
Citation Counts
35
70
4,499
Chuyang Tang
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
119
349
46,187
Environmental engineering
Membrane technology
Desalination
Water reuse
Tong Zhang Hku
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
117
323
45,024
Environmental Biotechnology
Environmental Microbiology
Environmental Microbiome
Biological Wastewater Treatment
Xd Li Li Xiang Dong
Metrics
H-Index
i10-Index
Citation Counts
102
240
40,185
Environmental Sciences
antibiotic resistance
air pollution and health
environmental geochemistry
phytoremediation
Ho Wing Kei
Metrics
H-Index
i10-Index
Citation Counts
101
200
40,565
Wen Xiong Wang
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
93
490
31,768
Metal Ecotoxicology and Biogeochemistry
Xiaoling Zhang
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
90
256
25,177
Urban Sustainability
Sustainable built environment
Carbon neutrality
Sustainability Science
Xiao Yan Li Xy Li
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
77
251
24,780
Water quality and water supply
Wastewater treatment
Particle dynamics in water
Tung Chai Bill Ling
Metrics
H-Index
i10-Index
Citation Counts
68
160
14,924
Waste recycling
Eco-friendly concrete
CO2 mineralization
Low carbon cement
Linwei Tian
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
65
165
13,090
Environmental epidemiology
air pollution and health
chemical carcinogenesis
Jiu Jimmy Jiao 焦赳赳
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
57
160
9,198
Hydrogeology
Groundwater
Coastal Hydrogeology
Engineering Geology
HKU-DES
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!
Yiu Fai Tsang
Metrics
H-Index
i10-Index
Citation Counts
56
186
14,142
Wastewater Treatment
Microplastics and Nanoplastics
Resource Recovery
Environmental Engineering
Environmental Technology
Zhi Ning
Metrics
H-Index
i10-Index
Citation Counts
52
107
10,250
air quality
sensor
instrumentation
public health
Dongxing Xuan
Metrics
H-Index
i10-Index
Citation Counts
51
91
7,409
Enviromental Science and Technology
Material Science of cement composite
Materials and Structure Design of Pavements
Alicia Kyoungjin An
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
49
115
8,135
Water
Membrane
and Energy
Leung Cw
Metrics
H-Index
i10-Index
Citation Counts
48
126
6,549
Air Pollution
Combustion
Fluid Mechanics
Fuel Engineering
Heat Transfer
Hong Qiu
Metrics
H-Index
i10-Index
Citation Counts
46
82
4,986
Environmental Health
Epidemiology
Air Pollution
Kelvin Sze Yin Leung
Hong Kong Baptist University
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
46
109
5,890
Environmental Analytical Chemistry
Analytical Spectrometry
Meng Gao
Hong Kong Baptist University
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
45
94
7,192
atmospheric chemistry modeling
chemistry-climate interactions
Lai Alvin
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
45
98
7,568
Indoor Air Quality
Aerosols
Season Si Chen
City University of Hong Kong
Kowloon, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
39
55
6,847
Environmental Engineering
Chemical Engineering
Biomass Conversion
Waste Valorization
Cui Guo (郭萃)|Guo, C, C GUO
Metrics
H-Index
i10-Index
Citation Counts
38
55
5,068
Environmental Health
Life course/lifespan
Healthy cities
Chronic diseases
Cohort studies
Peter Yu
Metrics
H-Index
i10-Index
Citation Counts
38
77
4,564
environmental
microbiology
Chinese medicine
food
health
Hao Guo 郭浩|Hao Guo, Guo Hao
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
35
51
5,383
Environmental Engineering
water reuse
membrane technology
Peter Hills
University of Hong Kong
Pokfulam, Hong Kong
Metrics
H-Index
i10-Index
Citation Counts
35
70
4,499
energy policy
sustainable development
environmental policy
environmental management