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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 31 9649 9232 23 23 157 5037

Zaini Ujang publications per year

The chart shows the history of publications by Zaini Ujang between 1996 and 2022, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Zaini Ujang published across 27 years, from 1996 to 2022, averaging 6.1 papers a year. Output peaked at 19 publications in 2006. 1 of the 164 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1996 to 2022. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 2006. 1996: 1 publication 1997: 0 publications 1998: 1 publication 1999: 0 publications 2000: 3 publications 2001: 2 publications 2002: 8 publications 2003: 2 publications 2004: 13 publications 2005: 6 publications 2006: 19 publications 2007: 6 publications 2008: 17 publications 2009: 5 publications 2010: 13 publications 2011: 4 publications 2012: 10 publications 2013: 9 publications 2014: 14 publications 2015: 14 publications 2016: 5 publications 2017: 2 publications 2018: 1 publication 2019: 3 publications 2020: 5 publications 2021: 0 publications 2022: 1 publication
1996 2022

164 publications in total across all disciplines

View publications per year as a table
Zaini Ujang: publications per year, 1996 to 2022
Year Publications
1996 1
1997 0
1998 1
1999 0
2000 3
2001 2
2002 8
2003 2
2004 13
2005 6
2006 19
2007 6
2008 17
2009 5
2010 13
2011 4
2012 10
2013 9
2014 14
2015 14
2016 5
2017 2
2018 1
2019 3
2020 5
2021 0
2022 1
Total 164
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Zaini Ujang publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Zaini Ujang sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 151–160 publications, is where this scientist sits. 41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 282 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 157 publications — 45th percentile

45% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539 157
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155
281–290 130
291–300 127
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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Zaini Ujang D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Zaini Ujang sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 31 D-Index, is where this scientist sits. 30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 198 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 20 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125 D-Index: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 31 D-Index — 1st percentile

1% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26 31
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
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Overview

Zaini Ujang is affiliated with the Harvard Business School Alumni Club of Malaysia in Malaysia. Their research spans several key areas within environmental science and engineering, with a focus on wastewater treatment, microbial ecology, and fluid dynamics.

Their publication record includes research on topics such as wastewater treatment and nitrogen removal, anaerobic digestion and biogas production, and microbial community ecology and physiology. Additional topics include wind energy research and development, cavitation phenomena in pumps, fluid dynamics and turbulent flows, and issues related to microplastics and plastic pollution.

Frequent coauthors in their work include Mohd Hakim Ab Halim, Aznah Nor Anuar, Inawati Othman, Hasnida Harun, and Mark C.M. van Loosdrecht.

Their papers have appeared primarily in the following venues:

  • IOP Conference Series Earth and Environmental Science
  • KSCE Journal of Civil Engineering

Representative recent papers include:

  • Predictions of Wake and Central Mixing Region of Double Horizontal Axis Tidal Turbine, 2020, KSCE Journal of Civil Engineering
  • Identification and Role of Microbial Species Developed in Aerobic Granular Sludge Bioreactor for Livestock Wastewater Treatment, 2020, IOP Conference Series Earth and Environmental Science
  • Physical Characteristics and Removal Performance of Aerobic Granular Sludge in Biological Treatment of Domestic Wastewater, 2022, IOP Conference Series Earth and Environmental Science

Their main fields of study include environmental science and engineering. Subfields of focus within their work encompass pollution, building and construction, ecology, aerospace engineering, and mechanics of materials.

Best Publications

  • The food waste hierarchy as a framework for the management of food surplus and food waste

    Effie Papargyropoulou;Rodrigo Lozano;Julia K. Steinberger;Nigel Wright

  • Conceptual framework for the study of food waste generation and prevention in the hospitality sector.

    Effie Papargyropoulou;Nigel Wright;Rodrigo Lozano;Julia Steinberger

  • Arsenic removal technologies for drinking water treatment

    Kuan-Seong Ng;Zaini Ujang;Pierre Le-Clech

  • Patterns and Causes of Food Waste in the Hospitality and Food Service Sector: Food Waste Prevention Insights from Malaysia

    Effie Papargyropoulou;Julia K. Steinberger;Nigel Wright;Rodrigo Lozano

  • Livestock wastewater treatment using aerobic granular sludge.

    Inawati Othman;Aznah Nor Anuar;Zaini Ujang;Noor Hasyimah Rosman

  • Polymer-based chelating adsorbents for the selective removal of boron from water and wastewater: A review

    Mohamed Mahmoud Nasef;Madana Nallappan;Zaini Ujang

  • Characterization of aerobic granular sludge treating high strength agro-based wastewater at different volumetric loadings.

    Norhayati Abdullah;Ali Yuzir;Thomas P. Curtis;Adibah Yahya

  • The influenced of PAC, zeolite, and Moringa oleifera as biofouling reducer (BFR) on hybrid membrane bioreactor of palm oil mill effluent (POME).

    A. Damayanti;Zaini Ujang;M. R. Salim

  • Projection of CO2 emissions in Malaysia

    Nor Sharliza Mohd Safaai;Zainura Zainon Noor;Haslenda Hashim;Zaini Ujang

  • Aerobic granular sludge formation for high strength agro-based wastewater treatment.

    Norhayati Abdullah;Zaini Ujang;Adibah Yahya

  • Cultivation of aerobic granular sludge for rubber wastewater treatment.

    Noor Hasyimah Rosman;Aznah Nor Anuar;Inawati Othman;Hasnida Harun

  • Characteristics and performance of aerobic granular sludge treating rubber wastewater at different hydraulic retention time

    Noor Hasyimah Rosman;Aznah Nor Anuar;Shreeshivadasan Chelliapan;Mohd Fadhil Md Din

  • Water pinch analysis for an urban system: a case study on the Sultan Ismail Mosque at the Universiti Teknologi Malaysia (UTM)

    Z.A. Manan;S.R. Wan Alwi;Z. Ujang

  • Bio-fouling reducers for improving the performance of an aerobic submerged membrane bioreactor treating palm oil mill effluent

    Adhi Yuniarto;Zainura Zainon Noor;Zaini Ujang;Gustaf Olsson

  • Greenhouse gas reductions through enhanced use of residues in the life cycle of Malaysian palm oil derived biodiesel.

    Sune Balle Hansen;Stig Irving Olsen;Zaini Ujang

  • Settling behaviour of aerobic granular sludge.

    A. Nor Anuar;Z. Ujang;M.C.M. van Loosdrecht;M.K. de Kreuk

  • Runoff quality and pollution loadings from a tropical urban catchment

    Z. Yusop;L. W. Tan;Zaini Ujang;M. Mohamed

  • Water and wastewater in developing countries: Present reality and strategy for the future

    Z. Ujang;C. Buckley

  • Application of low-pressure reverse osmosis membrane for Zn2+ and Cu2+ removal from wastewater

    Zaini Ujang;G. K. Anderson

  • Influence of high temperature on the performance of aerobic granular sludge in biological treatment of wastewater.

    Mohd Hakim Ab Halim;Aznah Nor Anuar;Nur Syahida Abdul Jamal;Siti Izaidah Azmi

Frequent Co-Authors

Gustaf Olsson
Gustaf Olsson Lund University
Thorkild Hvitved-Jacobsen
Thorkild Hvitved-Jacobsen Aalborg University
M.C.M. van Loosdrecht
M.C.M. van Loosdrecht Delft University of Technology
Mohamed Mahmoud Nasef
Mohamed Mahmoud Nasef University of Technology Malaysia
Jes Vollertsen
Jes Vollertsen Aalborg University
Mogens Henze
Mogens Henze Technical University of Denmark
Shreeshivadasan Chelliapan
Shreeshivadasan Chelliapan University of Technology Malaysia
Zulkifli Yusop
Zulkifli Yusop University of Technology Malaysia
Zainuddin Abdul Manan
Zainuddin Abdul Manan University of Technology Malaysia
Rodrigo Lozano
Rodrigo Lozano University of A Coruña

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