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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 41 7841 7536 15 15 140 5374

Olalekan S. Fatoki publications per year

The chart shows the history of publications by Olalekan S. Fatoki between 1983 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Olalekan S. Fatoki published across 44 years, from 1983 to 2026, averaging 3.4 papers a year. Output peaked at 19 publications in 2013. 1 of the 151 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1983 to 2026. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 2013. 1983: 1 publication 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 1 publication 1988: 0 publications 1989: 1 publication 1990: 2 publications 1991: 2 publications 1992: 1 publication 1993: 3 publications 1994: 2 publications 1995: 1 publication 1996: 3 publications 1997: 2 publications 1998: 0 publications 1999: 0 publications 2000: 1 publication 2001: 4 publications 2002: 4 publications 2003: 5 publications 2004: 6 publications 2005: 1 publication 2006: 0 publications 2007: 0 publications 2008: 0 publications 2009: 3 publications 2010: 5 publications 2011: 7 publications 2012: 18 publications 2013: 19 publications 2014: 12 publications 2015: 10 publications 2016: 6 publications 2017: 7 publications 2018: 7 publications 2019: 3 publications 2020: 7 publications 2021: 3 publications 2022: 3 publications 2023: 0 publications 2024: 0 publications 2025: 0 publications 2026: 1 publication
1983 2026

151 publications in total across all disciplines

View publications per year as a table
Olalekan S. Fatoki: publications per year, 1983 to 2026
Year Publications
1983 1
1984 0
1985 0
1986 0
1987 1
1988 0
1989 1
1990 2
1991 2
1992 1
1993 3
1994 2
1995 1
1996 3
1997 2
1998 0
1999 0
2000 1
2001 4
2002 4
2003 5
2004 6
2005 1
2006 0
2007 0
2008 0
2009 3
2010 5
2011 7
2012 18
2013 19
2014 12
2015 10
2016 6
2017 7
2018 7
2019 3
2020 7
2021 3
2022 3
2023 0
2024 0
2025 0
2026 1
Total 151
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Olalekan S. Fatoki publications per year - data summary

  • Olalekan S. Fatoki, a Environmental Sciences scholar from Cape Peninsula University of Technology, has 151 publications recorded across 44 years, from 1983 to 2026.
  • The oldest publication on record dates to 1983 and the most recent to 2026.
  • The most productive year is 2013, with 19 publications.
  • The least productive years with any output are 1983, 1987, 1989, 1992 and others, with 1 publication each.
  • 12 of the 44 years in the span carry no publications at all (1984, 1985, 1986, 1988 and others).
  • The rate of publication averages 3.4 papers per year over the whole span, or 4.7 per year counting only the 32 years with at least one publication.
  • The last 5 years on the chart (2022-2026) hold 4 publications, 3% of the career total.
  • Split into equal eras - 1983-1997: 19 publications (1.3 per year); 1998-2012: 54 publications (3.6 per year); 2013-2026: 78 publications (5.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Olalekan S. Fatoki 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 Olalekan S. Fatoki 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, 131–140 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: 140 publications — 36th percentile

36% 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
131–140 544 140
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
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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Olalekan S. Fatoki publication distribution in Environmental Sciences in 2026 - data summary

  • The chart plots the publication count of all 9,676 Environmental Sciences scientists ranked by Research.com in 2026, grouped into 66 ranges running from 41–50 to 690+ publications.
  • Olalekan S. Fatoki, a Environmental Sciences scholar from Cape Peninsula University of Technology, records 140 publications - the 36th percentile of the discipline.
  • 36% of ranked Environmental Sciences scientists score the same or lower than Olalekan S. Fatoki, and about 64% score higher.
  • The median of the discipline falls in the 161–170 publications range, and Olalekan S. Fatoki ranks below the median.
  • The most crowded range is 121–130 publications, holding 617 scientists (6% of the field).
  • 67% of the field sits in the lowest quarter of the value range (up to 201–210 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 690 publications or more, 100 scientists in all (1% of the field).

Olalekan S. Fatoki 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 Olalekan S. Fatoki 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, 41 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: 41 D-Index — 22nd percentile

22% 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 41
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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Olalekan S. Fatoki D-index placement in Environmental Sciences in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 9,676 Environmental Sciences scientists ranked by Research.com in 2026, grouped into 97 ranges running from 30 to 126+ D-Index.
  • Olalekan S. Fatoki, a Environmental Sciences scholar from Cape Peninsula University of Technology, records 41 D-Index - the 22nd percentile of the discipline.
  • 22% of ranked Environmental Sciences scientists score the same or lower than Olalekan S. Fatoki, and about 78% score higher.
  • The median of the discipline falls in the 51 D-Index range, and Olalekan S. Fatoki ranks below the median.
  • The most crowded range is 45 D-Index, holding 348 scientists (4% of the field).
  • 59% of the field sits in the lowest quarter of the value range (up to 54 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 126 D-Index or more, 92 scientists in all (<1% of the field).

Overview

Olalekan S. Fatoki is affiliated with the Cape Peninsula University of Technology in South Africa. Their research primarily focuses on Environmental Science, with notable contributions across several related subfields such as Health, Toxicology and Mutagenesis, Pollution, Water Science and Technology, Biomedical Engineering, and Biomaterials.

The scientist's research topics encompass various specific areas including Toxic Organic Pollutants Impact, Environmental remediation with nanomaterials, Per- and polyfluoroalkyl substances research, Heavy metals in environment, Iron oxide chemistry and applications, Pharmaceutical and Antibiotic Environmental Impacts, and Microplastics and Plastic Pollution.

Frequent collaboration is observed with several coauthors, including:

  • Beatrice Olutoyin Opeolu
  • Omoniyi Pereao
  • Michael Ovbare Akharame
  • Bamidele Oladapo Fagbayigbo
  • Olatunde Stephen Olatunji

Olalekan S. Fatoki's recent papers cover a range of environmental science topics, with publications in established journals. Representative works include:

  • Microplastics in aquatic environment: characterization, ecotoxicological effect, implications for ecosystems and developments in South Africa (2020) - Environmental Science and Pollution Research
  • Preparation and characterisation of activated carbon from Vitis vinifera leaf litter and its adsorption performance for aqueous phenanthrene (2020) - Applied Biological Chemistry
  • Sorption and partitioning of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) onto sediments of Diep and Plankenburg river systems Western Cape, South Africa (2021) - Environmental Technology & Innovation
  • Adsorption of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) from water using leaf biomass (Vitis vinifera) in a fixed-bed column study (2020) - Journal of Environmental Health Science and Engineering
  • Accumulation and risk assessment of metals in palm oil cultivated on contaminated oil palm plantation soils (2020) - Toxicology Reports

The venues in which they publish are diverse but include Environmental Science and Pollution Research, Applied Biological Chemistry, Environmental Technology & Innovation, Journal of Environmental Health Science and Engineering, and Toxicology Reports, indicating a multidisciplinary approach within environmental science.

Best Publications

  • Assessment of the impact of point source pollution from the Keiskammahoek Sewage Treatment Plant on the Keiskamma River - pH, electrical conductivity, oxygen- demanding substance (COD) and nutrients

    G Morrison;OS Fatoki;L Persson;A Ekberg

  • Methods for selective determination of persistent organochlorine pesticide residues in water and sediments by capillary gas chromatography and electron-capture detection.

    O.S Fatoki;R.O Awofolu

  • An assessment of heavy metal pollution in the East London and Port Elizabeth harbours

    OS Fatoki;S Mathabatha

  • Levels of trace metals in water and sediment from Tyume River and its effects on an irrigated farmland

    OR Awofolu;Z Mbolekwa;V Mtshemla;OS Fatoki

  • A review of sequential extraction procedures for heavy metals speciation in soil and sediments.

    HK Okoro;Olalekan S Fatoki;Folahan A Adekola;Bhekumusa J Ximba

  • Adsorption of Cr (VI) on synthetic hematite (α-Fe2O3) nanoparticles of different morphologies

    Haleemat Iyabode Adegoke;Folahan AmooAdekola;Olalekan Siyanbola Fatoki;Bhekumusa Jabulani Ximba

  • Trace metal pollution in Umtata River

    OS Fatoki;N Lujiza;AO Ogunfowokan

  • Endocrine disrupting chemicals (phenol and phthalates) in the South African environment: a need for more monitoring

    O.O. Olujimi;Olalekan S Fatoki;James P Odendaal;J.O. Okonkwo

  • Determination of polycyclic aromatic hydrocarbons [PAHs] in processed meat products using gas chromatography – Flame ionization detector

    Olatunde Stephen Olatunji;Olalekan S Fatoki;Beatrice O Opeolu;Bhekumusa J Ximba

  • Phthalate esters in rivers of the greater Manchester area, U.K.

    Olalekan S Fatoki;F Vernon

  • Situation analysis of water quality in the Umtata River catchment

    O.S. Fatoki;N.Y.O. Muyima;N. Lujiza

  • Phthalate ester plasticizers in freshwater systems of Venda, South Africa and potential health effects.

    O.S. Fatoki;Maria S. Bornman;L. Ravandhalala;L. Chimuka

  • Solid Phase Extraction Method for Selective Determination of Phthalate Esters in the Aquatic Environment

    O. S. Fatoki;A. Noma

  • Levels of Cd, Hg and Zn in some surface waters from the Eastern Cape Province, South Africa

    OS Fatoki;R Awofolu

  • Human Exposure, Biomarkers, and Fate of Organotins in the Environment

    Hussein K. Okoro;Olalekan S. Fatoki;Folahan A. Adekola;Bhekumusa J. Ximba

  • Pollution assessment in the Keiskamma River and in the impoundment downstream

    Olalekan S Fatoki;P Gogwana;AO Ogunfowokan

  • Sorptive Interaction of Oxyanions with Iron Oxides: A Review

    Haleemat Iyabode Adegoke;Folahan Amoo Adekola;Olalekan Siyanbola Fatoki;Bhekumusa Jabulani Ximba

  • Removal of PFOA and PFOS from aqueous solutions using activated carbon produced from Vitis vinifera leaf litter

    Bamidele Oladapo Fagbayigbo;Beatrice Olutoyin Opeolu;Olalekan Siyanbola Fatoki;Terresa Ayuko Akenga

  • Determination and distribution of polycyclic aromatic hydrocarbons in rivers, surface runoff, and sediments in and around Thohoyandou, Limpopo Province, South Africa

    Takalani Joyce Nekhavhambe;Teunis van Ree;Olalekan Siyanbola Fatoki

  • Chemical monitoring and temporal variation in levels of endocrine disrupting chemicals (priority phenols and phthalate esters) from selected wastewater treatment plant and freshwater systems in Republic of South Africa

    O.O. Olujimi;Olalekan S Fatoki;James P Odendaal;Adegbenro P Daso

  • Determination of phthalate ester plasticizers in the aquatic environment of Southwestern Nigeria

    O.S. Fatoki;A.O. Ogunfowokan

Frequent Co-Authors

Gregory M. Morrison
Gregory M. Morrison Curtin University
Luke Chimuka
Luke Chimuka University of the Witwatersrand
Patrick A. Ndakidemi
Patrick A. Ndakidemi Agriculture Department of Natural Resources and Environment Tasmania
Oladele Osibanjo
Oladele Osibanjo University of Ibadan
Stephen J. Hill
Stephen J. Hill University of Nottingham

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