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Environmental Sciences
Pakistan
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 65 2174 2074 3 3 182 19200

Sardar Khan publications per year

The chart shows the history of publications by Sardar Khan between 1950 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Sardar Khan published across 76 years, from 1950 to 2025, averaging 3.4 papers a year. Output peaked at 28 publications in 2020. 22 of the 255 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1950 to 2025. Vertical axis: number of publications, 0 to 28. Peak 28 publications in 2020. 1950: 5 publications 1951: 0 publications 1952: 0 publications 1953: 0 publications 1954: 0 publications 1955: 0 publications 1956: 0 publications 1957: 0 publications 1958: 0 publications 1959: 0 publications 1960: 0 publications 1961: 0 publications 1962: 0 publications 1963: 0 publications 1964: 0 publications 1965: 0 publications 1966: 0 publications 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 0 publications 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 0 publications 1999: 0 publications 2000: 0 publications 2001: 0 publications 2002: 1 publication 2003: 1 publication 2004: 0 publications 2005: 0 publications 2006: 1 publication 2007: 2 publications 2008: 5 publications 2009: 4 publications 2010: 9 publications 2011: 6 publications 2012: 5 publications 2013: 13 publications 2014: 10 publications 2015: 17 publications 2016: 18 publications 2017: 11 publications 2018: 18 publications 2019: 11 publications 2020: 28 publications 2021: 20 publications 2022: 23 publications 2023: 25 publications 2024: 14 publications 2025: 8 publications
1950 2025

255 publications in total across all disciplines

View publications per year as a table
Sardar Khan: publications per year, 1950 to 2025
Year Publications
1950 5
1951 0
1952 0
1953 0
1954 0
1955 0
1956 0
1957 0
1958 0
1959 0
1960 0
1961 0
1962 0
1963 0
1964 0
1965 0
1966 0
1967 0
1968 0
1969 0
1970 0
1971 0
1972 0
1973 0
1974 0
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 0
1989 0
1990 0
1991 0
1992 0
1993 0
1994 0
1995 0
1996 0
1997 0
1998 0
1999 0
2000 0
2001 0
2002 1
2003 1
2004 0
2005 0
2006 1
2007 2
2008 5
2009 4
2010 9
2011 6
2012 5
2013 13
2014 10
2015 17
2016 18
2017 11
2018 18
2019 11
2020 28
2021 20
2022 23
2023 25
2024 14
2025 8
Total 255
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Sardar Khan publications per year - data summary

  • Sardar Khan, a Environmental Sciences scholar from University of Peshawar, has 255 publications recorded across 76 years, from 1950 to 2025.
  • The oldest publication on record dates to 1950 and the most recent to 2025.
  • The most productive year is 2020, with 28 publications.
  • The least productive years with any output are 2002, 2003 and 2006, with 1 publication each.
  • 53 of the 76 years in the span carry no publications at all (1951, 1952, 1953, 1954 and others).
  • The rate of publication averages 3.4 papers per year over the whole span, or 11.1 per year counting only the 23 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 90 publications, 35% of the career total.
  • Split into equal eras - 1950-1975: 5 publications (0.2 per year); 1976-2001: 0 publications (0.0 per year); 2002-2025: 250 publications (10.4 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Sardar Khan 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 Sardar Khan 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, 181–190 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: 182 publications — 57th percentile

57% 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
181–190 400 182
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
Download as CSV

Sardar Khan 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.
  • Sardar Khan, a Environmental Sciences scholar from University of Peshawar, records 182 publications - the 57th percentile of the discipline.
  • 57% of ranked Environmental Sciences scientists score the same or lower than Sardar Khan, and about 43% score higher.
  • The median of the discipline falls in the 161–170 publications range, and Sardar Khan ranks above 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).

Sardar Khan 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 Sardar Khan 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, 65 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: 65 D-Index — 78th percentile

78% 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 65
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
Download as CSV

Sardar Khan 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.
  • Sardar Khan, a Environmental Sciences scholar from University of Peshawar, records 65 D-Index - the 78th percentile of the discipline.
  • 78% of ranked Environmental Sciences scientists score the same or lower than Sardar Khan, and about 22% score higher.
  • The median of the discipline falls in the 51 D-Index range, and Sardar Khan ranks above 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).

Research.com Recognitions

  • 2026 - Research.com Environmental Sciences in Pakistan Leader Award
  • 2023 - Research.com Environmental Sciences in Pakistan Leader Award
  • 2022 - Research.com Environmental Sciences in Pakistan Leader Award

Overview

Sardar Khan is affiliated with the University of Peshawar in Pakistan. Their research primarily falls within the field of Environmental Science, encompassing over 180 publications. The scientist's work extends deeply into several subfields including Pollution, Health, Toxicology and Mutagenesis, Water Science and Technology, Plant Science, and Environmental Chemistry.

Their research covers a diversity of topics, with significant contributions addressing:

  • Heavy metals in environment
  • Heavy Metal Exposure and Toxicity
  • Heavy Metals in Plants
  • Arsenic contamination and mitigation
  • Water Quality and Pollution Assessment
  • Radioactivity and Radon Measurements
  • Groundwater and Isotope Geochemistry

Sardar Khan has been a frequent author in several scientific publication venues including:

  • Arabian Journal of Geosciences
  • Environmental Technology & Innovation
  • Environmental Science and Pollution Research
  • Research Square
  • Environmental Pollution

Some of the recent notable papers authored or co-authored by Sardar Khan include:

  • "Microplastics in the soil environment: A critical review" (2022, Environmental Technology & Innovation)
  • "Phosphorus Mobilization in Plant-Soil Environments and Inspired Strategies for Managing Phosphorus: A Review" (2022, Agronomy)
  • "Abundance, spatial distribution, and characteristics of microplastics in agricultural soils and their relationship with contributing factors" (2022, Journal of Environmental Management)
  • "Evaluation of the Swat River, Northern Pakistan, water quality using multivariate statistical techniques and water quality index (WQI) model" (2020, Environmental Science and Pollution Research)
  • "Potentially harmful metals, and health risk evaluation in groundwater of Mardan, Pakistan: Application of geostatistical approach and geographic information system" (2020, Geoscience Frontiers)

The scientist often collaborates with other researchers. Their frequent co-authors include:

  • Javed Nawab
  • Muhammad Amjad Khan
  • Shahla Nazneen
  • Said Muhammad
  • Junaid Ghani

Best Publications

  • Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China

    S. Khan;Q. Cao;Y.M. Zheng;Y.Z. Huang

  • The uptake and bioaccumulation of heavy metals by food plants, their effects on plants nutrients, and associated health risk: a review.

    Anwarzeb Khan;Sardar Khan;Muhammad Amjad Khan;Zahir Qamar

  • Health risk assessment of heavy metals and their source apportionment in drinking water of Kohistan region, northern Pakistan

    Said Muhammad;M. Tahir Shah;Sardar Khan

  • Soil contamination with cadmium, consequences and remediation using organic amendments

    Muhammad Amjad Khan;Sardar Khan;Sardar Khan;Anwarzeb Khan;Mehboob Alam

  • Sewage sludge biochar influence upon rice (Oryza sativa L) yield, metal bioaccumulation and greenhouse gas emissions from acidic paddy soil

    Sardar Khan;Cai Chao;Muhammad Waqas;Hans Peter H Arp

  • Drinking water quality and human health risk in Charsadda district, Pakistan

    Sardar Khan;Sardar Khan;Maria Shahnaz;Noor Jehan;Shafiqur Rehman

  • Soil and vegetables enrichment with heavy metals from geological sources in Gilgit, northern Pakistan

    Sardar Khan;Shafiqur Rehman;Anwar Zeb Khan;M. Amjad Khan

  • Effects of Cd and Pb on soil microbial community structure and activities

    Sardar Khan;Abd El-Latif Hesham;Min Qiao;Shafiqur Rehman

  • Accumulation of polycyclic aromatic hydrocarbons and heavy metals in lettuce grown in the soils contaminated with long-term wastewater irrigation.

    Sardar A. Khan;Lin Aijun;Shuzhen Zhang;Qinhong H Hu

  • A comparative study of human health risks via consumption of food crops grown on wastewater irrigated soil (Peshawar) and relatively clean water irrigated soil (lower Dir)

    F. Akbar Jan;M. Ishaq;S. Khan;I. Ihsanullah

  • Heavy metals in agricultural soils and crops and their health risks in Swat District, northern Pakistan

    Kifayatullah Khan;Yonglong Lu;Hizbullah Khan;Muhammad Ishtiaq

  • Use of constructed wetland for the removal of heavy metals from industrial wastewater.

    Sardar Khan;Irshad Ahmad;M. Tahir Shah;Shafiqur Rehman

  • Biochars induced modification of dissolved organic matter (DOM) in soil and its impact on mobility and bioaccumulation of arsenic and cadmium.

    Gang Li;Sardar Khan;Sardar Khan;Muhammad Ibrahim;Tian Ran Sun

  • Arsenic health risk assessment in drinking water and source apportionment using multivariate statistical techniques in Kohistan region, northern Pakistan.

    Said Muhammad;M. Tahir Shah;Sardar Khan

  • The influence of various biochars on the bioaccessibility and bioaccumulation of PAHs and potentially toxic elements to turnips (Brassica rapa L.).

    Sardar Khan;Sardar Khan;Muhammad Waqas;Fenghua Ding;Isha Shamshad

  • Determination of major and trace elements in ten important folk therapeutic plants of Haripur basin, Pakistan

    Shazia Jabeen;Muhammad Tahir Shah;Sardar Khan;Muhammad Qasim Hayat

  • Soil enzymatic activities and microbial community structure with different application rates of Cd and Pb

    Sardar Khan;Sardar Khan;Qing Cao;Abd El-Latif Hesham;Yue Xia

  • Application of biochar to soil reduces cancer risk via rice consumption: a case study in Miaoqian village, Longyan, China.

    Sardar Khan;Brian J. Reid;Gang Li;Yong-Guan Zhu

  • Health risks associated with heavy metals in the drinking water of Swat, northern Pakistan

    Kifayatullah Khan;Kifayatullah Khan;Yonglong Lu;Hizbullah Khan;Shahida Zakir

  • The effects of sewage sludge and sewage sludge biochar on PAHs and potentially toxic element bioaccumulation in Cucumis sativa L.

    Muhammad Waqas;Sardar Khan;Huang Qing;Brian J. Reid

  • Health risk assessment via surface water and sub-surface water consumption in the mafic and ultramafic terrain, Mohmand agency, northern Pakistan

    M.T. Shah;J. Ara;S. Muhammad;S. Muhammad;S. Khan

Frequent Co-Authors

Said Muhammad
Said Muhammad University of Peshawar
Yong-Guan Zhu
Yong-Guan Zhu Chinese Academy of Sciences
Mark L. Brusseau
Mark L. Brusseau University of Arizona
Huaiying Yao
Huaiying Yao Chinese Academy of Sciences
Brian J. Reid
Brian J. Reid University of East Anglia
Jian-Qiang Su
Jian-Qiang Su Chinese Academy of Sciences
Asad U. Khan
Asad U. Khan Aligarh Muslim University
Yonglong Lu
Yonglong Lu Chinese Academy of Sciences
Hans Peter H. Arp
Hans Peter H. Arp Norwegian University of Science and Technology
Ji-Zheng He
Ji-Zheng He University of Melbourne

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