World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
73
Citations
22744
World Ranking
1398
National Ranking
596

Samir Kumar Khanal 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 Samir Kumar Khanal sits on this spectrum.

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: 283 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: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 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 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 230 publications — 73rd percentile

73% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Samir Kumar Khanal 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 Samir Kumar Khanal sits on this spectrum.

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: 199 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: 19 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: 99 scientists
30 D-Index 125+

This scientist: 73 D-Index — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Samir Kumar Khanal is a researcher affiliated with the University of Hawaii at Manoa in the United States, focusing primarily on Environmental Science and Engineering. Their work spans multiple subfields including Water Science and Technology, Building and Construction, Pollution, Biomedical Engineering, and Industrial and Manufacturing Engineering.

Khanal's research topics cover several areas with a notable emphasis on anaerobic digestion and biogas production. Other significant topics include wastewater treatment and nitrogen removal, innovations in aquaponics and hydroponics systems, microbial fuel cells and bioremediation, biofuel production and bioconversion, minerals flotation and separation techniques, and constructed wetlands for wastewater treatment.

Frequent collaborators in their research include K.C. Surendra, Hui Lü, Sumeth Wongkiew, Wachiranon Chuenchart, and Ashok Pandey. These co-authors have been involved in numerous joint publications contributing to various aspects of environmental and engineering sciences.

Khanal has contributed to a range of scholarly articles published in several reputable venues. The most common journals for their work are Bioresource Technology, Water Research, ACS ES&T Engineering, Waste Management, and the Chemical Engineering Journal. The volume of publications in these venues underscores the scientist's engagement with core topics in environmental technology and waste management.

Among the recent publications by Khanal are:

  • "Anaerobic co-digestion: Current status and perspectives" (2021) published in Bioresource Technology
  • "Rethinking organic wastes bioconversion: Evaluating the potential of the black soldier fly (Hermetia illucens (L.)) (Diptera: Stratiomyidae) (BSF)" (2020) published in Waste Management
  • "Microbiological insights into anaerobic digestion for biogas, hydrogen or volatile fatty acids (VFAs): a review" (2022) published in Bioengineered
  • "Application of machine learning in anaerobic digestion: Perspectives and challenges" (2021) published in Bioresource Technology
  • "Synergistic association between cytochrome bd-encoded Proteiniphilum and reactive oxygen species (ROS)-scavenging methanogens in microaerobic-anaerobic digestion of lignocellulosic biomass" (2020) published in Water Research

Best Publications

  • Insights into the Fate and Removal of Antibiotics in Engineered Biological Treatment Systems: A Critical Review

    Akashdeep Singh Oberoi;Yanyan Jia;Huiqun Zhang;Samir Kumar Khanal

  • Biological hydrogen production: effects of pH and intermediate products

    Samir Kumar Khanal;Wen-Hsing Chen;Ling Li;Shihwu Sung

  • Anaerobic digestion of lignocellulosic biomass: challenges and opportunities.

    Chayanon Sawatdeenarunat;K.C. Surendra;Devin Takara;Hans Oechsner

  • Environmental application of biochar: Current status and perspectives

    Fernanda R. Oliveira;Anil K. Patel;Deb P. Jaisi;Sushil Adhikari

  • Anaerobic Biotechnology for Bioenergy Production: Principles and Applications

    Samir Kumar Khanal

  • Biogas as a sustainable energy source for developing countries: Opportunities and challenges

    K.C. Surendra;Devin Takara;Andrew G. Hashimoto;Samir Kumar Khanal

  • Fate, Transport, and Biodegradation of Natural Estrogens in the Environment and Engineered Systems

    Samir Kumar Khanal;Bin Xie;Michael L. Thompson;Shihwu Sung

  • Biomass-derived syngas fermentation into biofuels: opportunities and challenges.

    Pradeep Chaminda Munasinghe;Samir Kumar Khanal

  • Remote Sensing in Agriculture - Accomplishments, Limitations, and Opportunities

    Unknown

  • Microbiological insights into anaerobic digestion for biogas, hydrogen or volatile fatty acids (VFAs): a review

    Unknown

  • Kinetic study of biological hydrogen production by anaerobic fermentation

    Wen-Hsing Chen;Shen-Yi Chen;Samir Kumar Khanal;Shihwu Sung

  • Bioconversion of organic wastes into biodiesel and animal feed via insect farming

    K.C. Surendra;Robert Olivier;Jeffery K. Tomberlin;Rajesh Jha

  • Ultrasound Applications in Wastewater Sludge Pretreatment: A Review

    Samir Kumar Khanal;David Grewell;Shihwu Sung;J. (Hans) van Leeuwen

  • Anaerobic co-digestion: Current status and perspectives.

    Renisha Karki;Wachiranon Chuenchart;K.C. Surendra;Shilva Shrestha

  • Nitrous oxide (N2O) emission from aquaculture: a review.

    Zhen Hu;Jae Woo Lee;Kartik Chandran;Sungpyo Kim

  • Rethinking organic wastes bioconversion: Evaluating the potential of the black soldier fly (Hermetia illucens (L.)) (Diptera: Stratiomyidae) (BSF).

    K.C. Surendra;Jeffery K. Tomberlin;Arnold van Huis;Jonathan A. Cammack

  • Anaerobic Biotechnology for Bioenergy Production

    Samir Kumar Khanal

  • Nitrogen transformations in aquaponic systems: A review

    Sumeth Wongkiew;Zhen Hu;Kartik Chandran;Jae Woo Lee

  • Anaerobic digestion for bioenergy production: Global status, environmental and techno-economic implications, and government policies.

    Juliana Vasco-Correa;Sami Khanal;Ashish Manandhar;Ajay Shah

  • Effect of plant species on nitrogen recovery in aquaponics

    Zhen Hu;Jae Woo Lee;Kartik Chandran;Sungpyo Kim

  • Understanding the Role of Extracellular Polymeric Substances on Ciprofloxacin Adsorption in Aerobic Sludge, Anaerobic Sludge, and Sulfate-Reducing Bacteria Sludge Systems.

    Huiqun Zhang;Yanyan Jia;Samir Kumar Khanal;Hui Lu

  • Biological strategies for enhanced hydrolysis of lignocellulosic biomass during anaerobic digestion: Current status and future perspectives

    Shilva Shrestha;Xavier Fonoll;Samir Kumar Khanal;Lutgarde Raskin

  • Anaerobic biorefinery: Current status, challenges, and opportunities.

    Chayanon Sawatdeenarunat;Duc Nguyen;K.C. Surendra;Shilva Shrestha

Frequent Co-Authors

Shihwu Sung
Shihwu Sung University of Hawaii at Hilo
Kartik Chandran
Kartik Chandran Albert Einstein College of Medicine
Guanghao Chen
Guanghao Chen Hong Kong University of Science and Technology
Ashok Pandey
Ashok Pandey Indian Institute of Toxicology Research
Lutgarde Raskin
Lutgarde Raskin University of Michigan–Ann Arbor
Sunita Varjani
Sunita Varjani University of Petroleum and Energy Studies
Jeffery K. Tomberlin
Jeffery K. Tomberlin Texas A&M University
Qi Zhou
Qi Zhou Tongji University
Edgard Gnansounou
Edgard Gnansounou École Polytechnique Fédérale de Lausanne
Chettiyappan Visvanathan
Chettiyappan Visvanathan Asian Institute of Technology

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