Publications

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2024

  • Korak, J.A.*; Brandhuber, P.J.; Goodwill, J.E.* Lithium in drinking water: Review of chemistry, analytical methods, and treatment technologies. AWWA Water Science, 6(6), e70009. https://doi.org/10.1002/aws2.70009
  • Mungan A.L.; Hjelvik, E.A.; Straub, A.P.; Korak, J.A.*; A hybrid anion exchanger with nanoscale zero valent iron for trace hexavalent chromium removal from drinking water. Environmental Science: Advances, 2024, 3, 1598 - 1615.https://doi.org/10.1039/D4VA00246F
  • Korak, J.A. and McKay, G.M. Use of Fluorescence and Absorbance as Surrogates for the Aromaticity and Molecular Weight of Dissolved Organic Matter. Environmental Science: Processes and Impacts, 2024, 26, 1663-1702. https://doi.org/10.1039/D4EM00183D
  • Korak, J.A. and McKay, G.M. Metanalysis of Optical Properties for the Characterization of Dissolved Organic Matter. Environmental Science & Technology, 2024, 58 (17) 7380-7392. https://doi.org/10.1021/acs.est.3c10627
  • Magliozzi, L.; Matiasek, S.; Charles Alpers, C.; Korak, J.A.; McKnight, D., Foster, A.; Ryan, J.; Roth, D.; Tsui, M.T.; Chow, A.T.; Webster, J.P.. Wildland-Urban Interface Wildfire Increases Metal Contributions to Stormwater Runoff in Paradise, CA. Environmental Science: Processes and Impacts, 2024, 26, 667-685. https://doi.org/10.1039/D3EM00298E

2023

  • Warren, M.; Crespo-Medina, M.; Ramirez-Toro, Rodriguez, R.; Hernandez, M.; Rosario-Ortiz, F.L.; Korak, J.A. Water quality in Puerto Rico after Hurricane Maria: Challenges associated with lead assessment and potential regulatory implications. ACS ES&T Water, 2023, 3 (2), 354-365. https://doi.org/ 10.1021/acsestwater.2c00425
  • Korak, J.A.; Mungan, A.L.; Watts, L.T. Critical Review of Waste Brine Management Strategies for Drinking Water Treatment Using Strong Base Ion Exchange. Journal of Hazardous Materials 2022, 129473. https://doi.org/10.1016/j.jhazmat.2022.129473

2022

  • Arias-Paic, M.; Korak, J.A.; Method for purifying and recovering solvent from ion exchange processes. U.S. Patent and Trademark Office. Patent Number 11,478,749 B2. Granted October 25, 2022.

2021

  • Flint, L.C; Arias-Paić M.S.; Korak, J.A.. Removal of hexavalent chromium by anion exchange: non-target anion behavior and practical implications. Environ. Sci.: Water Res. Technol 2021, 7, 2397–2413. https://doi.org/10.1039/d1ew00382h
  • Korak, J. A., Flint, L. C. & Arias-Paić, M. Decreasing waste brine volume from anion exchange with nanofiltration: implications for multiple treatment cycles. Environmental Science: Water Research and Technology,2021. https://doi.org/10.1039/D1EW00001B.

2020

2019

  • Ulliman, S.L.; Korak, J. A.; Linden, K.G.; Rosario-Ortiz, F.L.; Methodology for selection of optical parameters as wastewater effluent organic matter surrogates. Water Research, 2019, https://doi.org/10.1016/j.watres.2019.115321.

2018 

  • McKay, G.; Korak, J. A.; Rosario-Ortiz, F. L. Temperature dependence of the fluorescence of dissolved organic matter: Implications for DOM photophysics. Environmental Science and Technology, 2018, 52, 9022-9032. https://doi.org/10.1021/acs.est.8b00643
  • Korak, J.A.; Huggins, R.; Arias-Paic, M.; Nanofiltration to improve process efficiency of hexavalent chromium treatment using ion exchange. Journal-American Water Works Association, 2018, 110 (6), E13-E26. https://doi.org/10.1002/awwa.1051
  • Kennedy, A.M.; Korak, J.A.; Flint, L.; Hoffman, C.; Arias-Paic, M. Pilot-scale studies of chromium removal using stannous chloride. Journal-American Water Works Association, 2018,110 (4), E29-E42. https://doi.org/10.1002/awwa.1048
  • McKay, G.M.; Korak, J.A.; Erickson, P.R.; Latch, D.E.; McNeill, K.; Rosario-Ortiz, F.L. The case against charge transfer interactions in dissolved organic matter photophysics. Environmental Science and Technology, 2018, 52, 406-414. https://doi.org/10.1021/acs.est.7b03589
  • McKay, G.M.; Korak, J.A.; Erickson, P.R.; Latch, D.E.; McNeill, K.; Rosario-Ortiz, F.L. Response to comment on the case against charge transfer interactions in dissolved organic matter photophysics. Environmental Science and Technology, 2018, 52 (9) 5514-5516. https://doi.org/10.1021/acs.est.8b01807 (Correspondence, not peer-reviewed)
  • Ling, A.; Korak, J.A.; Schliep, A. Lead and Copper Corrosion in Distribution Systems: Current Understanding and Outlook. Breeze Minnesota Section of the AWWA, 2018, 22–24. (Viewpoint, not peer-reviewed)

2017

  • Korak, J.A.; Huggins, R; Arias-Paic, M. Regeneration of pilot-scale ion exchange columns for hexavalent chromium removal. Water Research, 2017, 118, 141-151. https://doi.org/10.1016/j.watres.2017.03.018
  • Cawley, K.; Hohner, A.; Podgorski, D.; Cooper, W.; Korak, J.A.; Rosario-Ortiz, F. Molecular and spectroscopic characterization of water extractable organic matter from thermally altered soils reveal insight into disinfection byproduct precursors. Environmental Science and Technology, 2017, 51 (2), 771-779. https://doi.org/10.1021/acs.est.6b05126
  • Rosario-Ortiz, F.L.; Korak, J.A.; Oversimplification of Dissolved Organic Matter Fluorescence Analysis: Potential Pitfalls of Current Methods. Environmental Science and Technology, 2017, 51 (2), 759-761. https://doi.org/10.1021/acs.est.6b06133 (Viewpoint Article, not peer-reviewed)

2015

  • Korak, J.A.; Rosario-Ortiz, F.L.; Summers, R.S. Evaluation of optical surrogates for the characterization of DOM removal by coagulation. Environmental Science: Water Research & Technology, 2015, 1 493-506. https://doi.org/10.1039/C5EW00024F
  • Korak, J. A.; Wert, E. C.; Rosario-Ortiz, F. L. Fluorescence spectroscopy as a surrogate for the release of intracellular organic matter upon oxidation of cyanobacteria cells. Journal-American Water Works Association, 2015, 107 (1), E523-E542. https://doi.org/10.5942/jawwa.2015.107.0142
  • Korak, J.A.; Wert, E.C.; Rosario-Ortiz, F.L. Evaluating fluorescence spectroscopy as a tool to characterize cyanobacteria intracellular organic matter upon simulated release and oxidation in natural water. Water Research, 2015, 68 432-443. https://doi.org/10.1016/j.watres.2014.09.046
  • Cawley, K.M.; Korak, J.A.; Rosario-Ortiz, F.L. Quantum yields for the formation of reactive intermediates from dissolved organic matter samples from the Suwannee River. Environmental Engineering Science, 2015. 32 31-37. https://doi.org/10.1089/ees.2014.0280
  • Lester, Y.; Thurman, E.M.; Ferrer, I.; Sitterley, K.; Korak, J.A.; Aiken, G.; Linden, K.; Characterization of fracturing flowback water in Colorado: Implications for water treatment. Science of the Total Environment, 512-513, 2015, 637-644. https://doi.org/10.1016/j.scitotenv.2015.01.043

2014

  • Wert, E.C.; Korak, J.A.; Trenholm, R.A.; Rosario-Ortiz, F.L. Effect of oxidant exposure on the release of intracellular microcystin, MIB, geosmin from three cyanobacteria. Water Research, 2014, 52, 251-259. https://doi.org/10.1016/j.watres.2013.11.001
  • Korak, J.A.; Dotson, A.D.; Summers, R.S.; Rosario-Ortiz, F.L. Critical analysis of commonly used fluorescence metrics to characterize dissolved organic matter. Water Research, 2014, 49, 327–338. https://doi.org/10.1016/j.watres.2013.11.025
  • Korak, J.A.; Rosario-Ortiz, F.L.; Summers, R.S. Fluorescence characterization of humic substance coagulation: Application of new tools to an old process. In Advances in the Physicochemical Characterization of Organic Matter; Rosario-Ortiz, F.L., Ed; ACS Symposium Series 1160; American Chemical Society: Washington DC, 2014; pp 281-300. https://doi.org/10.1021/bk-2014-1160.ch014
  • Mostafa, S.; Korak, J.A.; Shimabuku, K; Glover, C.M.; Rosario-Ortiz, F.L. Relation between optical properties and formation of reactive intermediates from different size fractions of organic matter. In Advances in the Physicochemical Characterization of Organic Matter; Rosario-Ortiz, F.L., Ed; ACS Symposium Series 1160; American Chemical Society: Washington DC, 2014; pp 159-179. https://doi.org/10.1021/bk-2014-1160.ch008

2013

  • Beggs, K. M. H.; Bilica, J. A.; Korak, J.A.; Rosario-Ortiz, F. L.; McKnight, D. M.; Summers, R. S. Spectral evaluation of watershed dissolved organic matter and DBP precursors. Journal-American Water Works Association, 2013, 105 (4) E173-188.