World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
105
Citations
35592
World Ranking
273
National Ranking
124

Chemistry

D-Index
101
Citations
32408
World Ranking
1236
National Ranking
478

John M. Zachara 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 John M. Zachara 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: 356 publications — 91st percentile

91% of scientists in this discipline score the same or lower.

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

John M. Zachara 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 John M. Zachara 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: 105 D-Index — 97th percentile

97% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2006 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

John M. Zachara is affiliated with the Pacific Northwest National Laboratory in the United States. Their research is primarily situated within the field of Environmental Science, with particular focus on subfields such as Environmental Engineering, Water Science and Technology, Environmental Chemistry, Ecology, and Global and Planetary Change.

The scientist's main research topics include Groundwater flow and contamination studies, Hydrology and Watershed Management Studies, Soil and Water Nutrient Dynamics, Hydrology and Sediment Transport Processes, Atmospheric and Environmental Gas Dynamics, and Radioactive element chemistry and processing.

John M. Zachara has contributed to several research articles published in diverse venues. Recent notable papers include:

  • "River Dynamics Control Transit Time Distributions and Biogeochemical Reactions in a Dam-Regulated River Corridor", 2020, Water Resources Research
  • "Using Ensemble Data Assimilation to Estimate Transient Hydrologic Exchange Flow Under Highly Dynamic Flow Conditions", 2022, Water Resources Research
  • "Kilometer-Scale Hydrologic Exchange Flows in a Gravel Bed River Corridor and Their Implications to Solute Migration", 2020, Water Resources Research
  • "Understanding Contaminant Migration Within a Dynamic River Corridor Through Field Experiments and Reactive Transport Modeling", 2020, Frontiers in Water
  • "Understanding Contaminant Migration within a Dynamic River Corridor Through Integrated Field and Laboratory Experiments and Reactive Transport Modeling", 2020, Goldschmidt Abstracts

Frequent co-authors collaborating with John M. Zachara include:

  • Xingyuan Chen
  • Glenn Hammond
  • Yilin Fang
  • Xuehang Song
  • Pin Shuai

Publications by John M. Zachara commonly appear in the following venues:

  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)
  • Water Resources Research
  • Frontiers in Water
  • Goldschmidt Abstracts

John M. Zachara was awarded the distinction of Fellow of the American Association for the Advancement of Science (AAAS) in 2006.

Best Publications

  • Subsurface transport of contaminants

    John F. McCarthy;John M. Zachara

  • Metal Oxide Surfaces and Their Interactions with Aqueous Solutions and Microbial Organisms.

    Gordon E. Brown;Victor E. Henrich;William H. Casey;David L. Clark

  • BIOGENIC IRON MINERALIZATION ACCOMPANYING THE DISSIMILATORY REDUCTION OF HYDROUS FERRIC OXIDE BY A GROUNDWATER BACTERIUM

    James K. Fredrickson;John M. Zachara;David W. Kennedy;Hailang Dong

  • Microbial Reduction of Crystalline Iron(III) Oxides: Influence of Oxide Surface Area and Potential for Cell Growth

    Eric E. Roden;John M. Zachara

  • RESPIRATION OF METAL (HYDR)OXIDES BY SHEWANELLA AND GEOBACTER: A KEY ROLE FOR MULTIHAEM C-TYPE CYTOCHROMES

    Liang Shi;Thomas C. Squier;John M. Zachara;James K. Fredrickson

  • Sorption of divalent metals on calcite

    J.M. Zachara;C.E. Cowan;C.T. Resch

  • Environmental chemistry of chromium.

    Unknown

  • Chemical contaminants on DOE lands and selection of contaminant mixtures for subsurface science research

    Unknown

  • Characterization of an electron conduit between bacteria and the extracellular environment

    Robert S. Hartshorne;Catherine L. Reardon;Daniel Ross;Jochen Nuester

  • Bacterial reduction of crystalline Fe (super 3+) oxides in single phase suspensions and subsurface materials

    John M. Zachara;James K. Fredrickson;Shu-Mei Li;David W. Kennedy

  • Biomineralization of Poorly Crystalline Fe(III) Oxides by Dissimilatory Metal Reducing Bacteria (DMRB)

    John M. Zachara;Ravi K. Kukkadapu;James K. Fredrickson;Yuri A. Gorby

  • Auger parameter measurements of zinc compounds relevant to zinc transport in the environment

    L. S. Dake;D. R. Baer;J. M. Zachara

  • Reduction of U(VI) in goethite (α-FeOOH) suspensions by a dissimilatory metal-reducing bacterium

    James K Fredrickson;John M Zachara;David W Kennedy;Martine C Duff

  • Geomicrobiology of High-Level Nuclear Waste-Contaminated Vadose Sediments at the Hanford Site, Washington State

    James K. Fredrickson;John M. Zachara;David L. Balkwill;David Kennedy

  • c-Type cytochrome-dependent formation of U(IV) nanoparticles by Shewanella oneidensis.

    Matthew J Marshall;Alexander S Beliaev;Alice C Dohnalkova;David W Kennedy

  • The roles of outer membrane cytochromes of Shewanella and Geobacter in extracellular electron transfer.

    Liang Shi;David J. Richardson;Zheming Wang;Sebastien N. Kerisit

  • Reduction kinetics of Fe(III), Co(III), U(VI), Cr(VI), and Tc(VII) in cultures of dissimilatory metal‐reducing bacteria

    Chongxuan Liu;Yuri A. Gorby;John M. Zachara;James K. Fredrickson

  • Structure of a bacterial cell surface decaheme electron conduit

    Thomas A. Clarke;Marcus J. Edwards;Andrew J. Gates;Andrea Hall

  • Sorption of Cs+ to micaceous subsurface sediments from the Hanford site, USA

    John M Zachara;Steven C Smith;Chongxuan Liu;James P McKinley

  • Inhibition of bacterial U(VI) reduction by calcium

    Scott C. Brooks;James K. Fredrickson;Sue L. Carroll;David W. Kennedy

  • The effect of calcium on aqueous uranium(VI) speciation and adsorption to ferrihydrite and quartz

    Patricia M. Fox;James A. Davis;John M. Zachara

  • Isolation of a high-affinity functional protein complex between OmcA and MtrC: Two outer membrane decaheme c-type cytochromes of Shewanella oneidensis MR-1.

    Liang Shi;Baowei Chen;Zheming Wang;Dwayne A. Elias

  • Models for Association of Metal Ions with Heterogeneous Environmental Sorbents. 1. Complexation of Co(II) by Leonardite Humic Acid as a Function of pH and NaClO4 Concentration.

    John C. Westall;John D. Jones;Gary D. Turner;John M. Zachara

  • Kinetic analysis of the bacterial reduction of goethite.

    Chongxuan Liu;Sreenivas Kota;John M. Zachara;Jim K. Fredrickson

Frequent Co-Authors

Chongxuan Liu
Chongxuan Liu Southern University of Science and Technology
James K. Fredrickson
James K. Fredrickson Pacific Northwest National Laboratory
James P. McKinley
James P. McKinley Pacific Northwest National Laboratory
Liang Shi
Liang Shi Pacific Northwest National Laboratory
Ravi K. Kukkadapu
Ravi K. Kukkadapu Environmental Molecular Sciences Laboratory
Steve M. Heald
Steve M. Heald Argonne National Laboratory
Alice Dohnalkova
Alice Dohnalkova Pacific Northwest National Laboratory
David J. Richardson
David J. Richardson Microsoft (United States)
Chunmiao Zheng
Chunmiao Zheng Southern University of Science and Technology
Julea N. Butt
Julea N. Butt University of East Anglia

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