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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 66 2121 2024 1 1 264 14146

Qaisar Mahmood publications per year

The chart shows the history of publications by Qaisar Mahmood between 2005 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Qaisar Mahmood published across 21 years, from 2005 to 2025, averaging 16 papers a year. Output peaked at 23 publications in 2020. 31 of the 337 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 2005 to 2025. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 2020. 2005: 2 publications 2006: 6 publications 2007: 10 publications 2008: 20 publications 2009: 14 publications 2010: 19 publications 2011: 22 publications 2012: 7 publications 2013: 16 publications 2014: 17 publications 2015: 22 publications 2016: 20 publications 2017: 19 publications 2018: 14 publications 2019: 16 publications 2020: 23 publications 2021: 17 publications 2022: 22 publications 2023: 20 publications 2024: 16 publications 2025: 15 publications
2005 2025

337 publications in total across all disciplines

View publications per year as a table
Qaisar Mahmood: publications per year, 2005 to 2025
Year Publications
2005 2
2006 6
2007 10
2008 20
2009 14
2010 19
2011 22
2012 7
2013 16
2014 17
2015 22
2016 20
2017 19
2018 14
2019 16
2020 23
2021 17
2022 22
2023 20
2024 16
2025 15
Total 337
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Qaisar Mahmood 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 Qaisar Mahmood 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, 261–270 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: 264 publications — 80th percentile

80% 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
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
261–270 181 264
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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Qaisar Mahmood 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 Qaisar Mahmood 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, 66 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: 66 D-Index — 79th percentile

79% 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
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 66
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

Qaisar Mahmood is affiliated with the University of Bahrain in Bahrain and has made numerous contributions to the field of environmental science. Their work spans multiple subfields such as pollution, plant science, industrial and manufacturing engineering, environmental engineering, and water science and technology. Mahmood's research primarily focuses on wastewater treatment, nitrogen removal, microbial fuel cells, bioremediation, and issues related to heavy metals and nutrient management in the environment.

They have published extensively in various scientific journals and venues. Frequent publication venues include:

  • SSRN Electronic Journal
  • Bioresource Technology
  • Environmental Science and Pollution Research
  • Arabian Journal of Geosciences
  • Water

Mahmood has collaborated frequently with several co-authors across different projects. Notable frequent co-authors are:

  • Jing Cai
  • Bilong Chen
  • Bibi Saima Zeb
  • Wang Kai-quan
  • Malik Tahir Hayat

Their recent papers include the following:

  • "Green synthesis of a silver nanoparticle using Moringa oleifera seed and its applications for antimicrobial and sun-light mediated photocatalytic water detoxification" (2021, Journal of Environmental Chemical Engineering)
  • "Insights into conventional and recent technologies for arsenic bioremediation: A systematic review" (2021, Environmental Science and Pollution Research)
  • "Quantitative determination of cavitation formation and sludge flotation in Anammox granules by using a new diffusion-reaction integrated mathematical model" (2020, Water Research)
  • "Alleviation of cadmium stress by silicon nanoparticles during different phenological stages of Ujala wheat variety" (2021, Arabian Journal of Geosciences)
  • "Promotion of Growth and Physiological Characteristics in Water-Stressed Triticum aestivum in Relation to Foliar-Application of Salicylic Acid" (2021, Water)

In addition to journal articles, Mahmood has contributed to book publications, including:

  • "Pharmaceutical Wastewater Treatment Technologies: Concepts and Implementation Strategies" published by UWA Publishing in 2021
  • "Sustainable Plant Nutrition under Contaminated Environments" published within Sustainable Plant Nutrition in a Changing World in 2022

Their research topics cover a broad range of environmental science issues such as:

  • Wastewater Treatment and Nitrogen Removal
  • Microbial Fuel Cells and Bioremediation
  • Heavy metals in environment
  • Phosphorus and nutrient management
  • Membrane Separation Technologies
  • Plant Stress Responses and Tolerance
  • Water Treatment and Disinfection

Best Publications

  • Performance of high-loaded ANAMMOX UASB reactors containing granular sludge

    Chong-Jian Tang;Ping Zheng;Cai-Hua Wang;Qaisar Mahmood

  • Waste biomass adsorbents for copper removal from industrial wastewater--a review.

    Muhammad Bilal;Jehanzeb Ali Shah;Tayyab Ashfaq;Syed Mubashar Hussain Gardazi

  • Assessing potential dietary toxicity of heavy metals in selected vegetables and food crops

    Ejaz ul Islam;Xiao-e Yang;Zhen-li He;Zhen-li He;Qaisar Mahmood

  • Microbial ecology of anaerobic digesters: the key players of anaerobiosis.

    Fayyaz Ali Shah;Qaisar Mahmood;Mohammad Maroof Shah;Arshid Pervez

  • Effect of Pb toxicity on leaf growth, physiology and ultrastructure in the two ecotypes of Elsholtzia argyi.

    Ejazul Islam;Dan Liu;Tingqiang Li;Xiaoe Yang

  • Comparative decolorization of dyes in textile wastewater using biological and chemical treatment

    Huma Hayat;Qaisar Mahmood;Arshid Pervez;Zulfiqar Ahmad Bhatti

  • Phosphate removal from solution using steel slag through magnetic separation

    Jibing Xiong;Zhenli He;Zhenli He;Qaisar Mahmood;Dan Liu

  • Co-digestion, pretreatment and digester design for enhanced methanogenesis

    Fayyaz Ali Shah;Qaisar Mahmood;Naim Rashid;Arshid Pervez

  • Suppression of anaerobic ammonium oxidizers under high organic content in high-rate Anammox UASB reactor.

    Chong-jian Tang;Ping Zheng;Cai-hua Wang;Qaisar Mahmood

  • Perspectives of low cost arsenic remediation of drinking water in Pakistan and other countries.

    Amir Haider Malik;Zahid Mehmood Khan;Qaisar Mahmood;Sadia Nasreen

  • Effects of cadmium on ultrastructure and antioxidative defense system in hyperaccumulator and non-hyperaccumulator ecotypes of Sedum alfredii Hance.

    Xiaofen Jin;Xiaoe Yang;Ejazul Islam;Dan Liu

  • Start-up and inhibition analysis of the Anammox process seeded with anaerobic granular sludge.

    Chong-jian Tang;Ping Zheng;Qaisar Mahmood;Jian-wei Chen

  • Enhanced nitrogen removal from pharmaceutical wastewater using SBA-ANAMMOX process

    Chong-Jian Tang;Ping Zheng;Ting-Ting Chen;Ji-Qiang Zhang

  • Floatation and control of granular sludge in a high-rate anammox reactor.

    Jianwei Chen;Qixing Ji;Ping Zheng;Tingting Chen

  • Anoxic Sulfide Biooxidation Using Nitrite as Electron Acceptor

    Qaisar Mahmood;Ping Zheng;Jing Cai;Donglei Wu

  • Effects of nanoscale zero-valent iron particles on biological nitrogen and phosphorus removal and microorganisms in activated sludge

    Donglei Wu;Yanhong Shen;Aqiang Ding;Qaisar Mahmood

  • Microbe and plant assisted-remediation of organic xenobiotics and its enhancement by genetically modified organisms and recombinant technology: A review.

    Imran Hussain;Gajender Aleti;Ravi Naidu;Markus Puschenreiter

  • Adsorptive removal of phosphate from aqueous media by peat

    J.B. Xiong;Q. Mahmood

  • Lead induced changes in the growth and antioxidant metabolism of the lead accumulating and non-accumulating ecotypes of Sedum alfredii.

    Dan Liu;Ting-Qiang Li;Xiao-Fen Jin;Xiao-E Yang

  • Green synthesis of a silver nanoparticle using Moringa oleifera seed and its applications for antimicrobial and sun-light mediated photocatalytic water detoxification

    Hafiza Mahreen Mehwish;Muhammad Shahid Riaz Rajoka;Yongai Xiong;Huiming Cai

  • Comparison of synthetic chelators and low molecular weight organic acids in enhancing phytoextraction of heavy metals by two ecotypes of Sedum alfredii Hance

    Dan Liu;Ejazul Islam;Tingqiang Li;Xiaoe Yang

  • Phytoremediation potential of Arundo donax in arsenic-contaminated synthetic wastewater

    Nosheen Mirza;Qaisar Mahmood;Arshid Pervez;Raza Ahmad

Frequent Co-Authors

Ping Zheng
Ping Zheng Zhejiang University
Tang Chongjian
Tang Chongjian Central South University
Xiaoe Yang
Xiaoe Yang Zhejiang University
Baolan Hu
Baolan Hu Zhejiang University
Tingqiang Li
Tingqiang Li Zhejiang University
Zhenli He
Zhenli He University of Florida
Liyuan Chai
Liyuan Chai Central South University
Shafaqat Ali
Shafaqat Ali Government College University, Faisalabad
Naser A. Anjum
Naser A. Anjum Aligarh Muslim University
A. Egrinya Eneji
A. Egrinya Eneji University of Calabar

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