News

Exciting news from the Korak 91Ҹ Group. Follow us on LinkedIn!

June 2026: Emma successfully defends her PhD in Environmental Engineering, which advances the use of coagulation as a pre-treatment for non-membrane water reuse treatment processes.

picture of student and professor

May 2026: Prof. Korak is awarded the Early Career Faculty Development Award by the Department of Civil, Environmental, and Architectural Engineering, 91Ҹ 91Ҹ.

April 2026: New paper published in Water 91Ҹ challenging the conservative mixing organic matter as characterized by size exclusion chromatography.

graphical abstract showing blending of organic matter in river

April 2026: Leah successfully defends her PhD in Environmental Engineering, which advances methodologies for studying the corrosion of cast iron pipes in drinking water distribution systems.

picture of student and professor

April 2026: Prof. Korak is inducted into the 40 Under 40 Rising Stars in Environmental Engineering and Science by the American Academy of Environmental Engineers and Scientists.

Logo from the AAEES 40 under 40 program

March 2026: New paper published in Géotechnique Letters collaborating with Prof. Zhang about mine tailings.

March 2026: New paper published in the Journal of Hazardous Materials presenting a more efficient method for regenerating ion exchange resin for arsenic treatment systems with co-occurring contaminants.

graphical abstract showing new regeneration method is more efficient.

Dec 2025: Best paper award! Outstanding Review in Environmental Science: Processes & Impacts of 2024, Royal Society of Chemistry (One paper was selected by the Editorial and Advisory Board Members).

Dec 2025:Isabella passes the Ph.D. Comprehensive Exam. Congrats!

Dec 2025:Emma passes the Ph.D. Comprehensive Exam. Congrats!

Sept 2025: New publication led by PhD student Emma that 91Ҹ organic carbon removal from wastewater effluent for water reuse. Published as part of ACS ES&T Engineering special issue “Global Challenges and Advances in Energy, Food, and Water Sustainability to Strengthen Climate Resilience”.

Graphical abstract from referenced paper

May 2025:Emma passes the Ph.D. Preliminary Exam. Congrats!

May 2025: The Bureau of Reclamation funds a new project through the in collaboration with Prof. Rahman and Leah.

May 2025: Emma wins a USGS 91Ҹ Award. Congrats!

April 2025: The Water 91Ҹ Foundation funds a led by the PI Korak in collaboration with Texas A&M University (Prof. McKay)

April 2025:Emma wins WateReuse Colorado General Scholarship and gives a presentation at the annual conference. Congrats!

January 2025: Leah passes the Ph.D. Comprehensive Exam. Congrats!

December 2024: New review publication in AWWA Water Science about lithium and drinking water treatment.

graphic highlighting lithium over PFAS

September 2024: New Open Access publication in Environmental Science: Advances by first author Annabel Mungan developing a hybrid ion exchange resin for hexavalent chromium removal.

graphical abstract illustrating new material for chromium removal

August 2024: Emma is awarded the James B. Warner Water Studies Scholarship from the Rocky Mountain Section of the American Water Works Association.

June 2024: New Open Access publication in Environmental Science: Processes and Impacts presenting a critical review of optical measurements (absorbance and fluorescence) as surrogates for organic matter aromaticity and molecular size.

graphical abstract showing interconnectedness of optical surrogates and organic matter chemistry

May 2024: Annabel is awarded Outstanding Masters Thesis for the Environmental Engineering Program.

Picture of graduate holding award

May 2024: 91Ҹ assistants Josh and Taylor graduate - thanks for all the hard work advancing several projects!

picture of people at graduation

April 2024: New Open Access publication in Environmental Science & Technology performing a meta-analysis of >700 samples for correlations in optical surrogates (absorbance and fluorescence) for organic matter.

Graphical abstract relating optical surrogates to tools.

Feb 2024: New publication in Environmental Science: Processes and Impacts about water quality after the Camp Fire in California.

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Graphical abstract illustrating run-off after a wildfire

Dec 2023:Ayush graduates with an M.S. in Global Engineering. Congrats!

Aug 2023:Annabel graduated with an M.S. in Environmental Engineering. Congrats!

May 2023: Prof. Korak is awarded the CEAE Department Teaching Award.

Jan 2023: Welcome graduate student Emma Wilder to the group.

Dec 2022: Prof. Korak joins as an Associate Editor.

Logo for journal

Dec 2022: New publication in the ACE ES&T Waterwith first author Melanie Warrenabout water quality sampling in Puerto Rico after Hurricane Maria.

2022 EST Water graphical abstract


Dec 2022: Ida graduated with an M.S. in Environmental Engineering. Congrats!

Dec 2022: Ayush is awarded theFigueroa Family Foundation Fellowship

Aug 2022: Landon graduated with an M.S. in Environmental Engineering. Congrats!

July 2022: Ayush is awarded a from the Rocky Mountain Section of the American Water Works Association.

June 2022: New publication in the Journal of Hazardous Materialswith Annabel and Landon reviewing strategies for managing waste brine from ion exchange processes.

2022 JHM Graphical abstract

May 2022: Ayush is awarded theCDM Smith Scholarship from the American Water Works Association and wins 2nd place in the poster competition at theRocky Mountain Section of the American Water Works Association Student Conference

May 2022: Prof. Korak is awardedFaculty Appreciation Award for Environmental Engineering voted by undergraduate students.

May 2022: Eva is awarded the Outstanding Graduate in the Environmental Engineering Program.

graduate and professor holding awards

April 2022: Annabel is awarded the NSF Graduate 91Ҹ Fellowship

March 2022:Annabel is awarded theHarlan Erker Memorial Scholarship

Oct 2021: New publication in Environmental Science: Water 91Ҹ and Technology with first author Leah Flint comparing resins for hexavalent chromium removal.

Flint 2021 graphical abstract

Aug2021:Welcome M.S. student Annabel Mungan to the group.

June 2021: Welcome B.S student Eva Thoresen to the group who started through the CU Summer Program for Undergraduate 91Ҹ(CU SPUR) program.

Mar 2021: New publication in Environmental Science: Water 91Ҹ and Technology with Leah Flint on decreasing waste brine volume from ion exchange using nanofiltration.

Mar21 TOC image

Jan 2021: Prof. Korak is invited to join the for Environmental Science & Technology.

Journal Advisory Board Cover

Dec 2020:Leah is awarded a from the Rocky Mountain Section of the American Water Works Association. Congrats!

Dec2020:based on Arias-Paic and Korak

Aug2020: Welcome graduate student Ida Clarke to the group!

July 2020:Juliette and Leah successfully complete and defend their Master Theses. Congrats!

May 2020: Ayush successfully passes his Ph.D. Preliminary Exam. Congrats!

May 2020: Prof. Korak is awardedFaculty Appreciation Award for Environmental Engineering voted by undergraduate students.

Jan 2020: New publication in Environmental Science and Technology Letterson integrating forward osmosis to manage ion echange waste.

Forward osmosis ion exchange

Jan 2020:Welcome graduate student Landon Watts to the group!

Jan 2020: Prof. Korak recognized as Top Reviewer for

Dec 2019: New publication in Water 91Ҹ on the
selection of optical properties for detection of wastewater effluent organic matter.

Graphical Abstract

Sept 2019: Welcome EVEN senior Peter Heller to the group!

Aug2019: Welcome graduate Student Ayush Raj Shahi to the group!

May 2019: Melanie Warren successfully defends her Masters Thesis on Post-Hurricane Maria water quality sampling in Puerto Rico. Congrats!

May 2019:Juliette Kaplan (M.S.) and Nadia Jorgenson (CU SPUR Program)jointhe group!

Feb 2019:Prof. Korak wins the 2019 Membrane Technology Best Paper Award from a publication in the

Nov 2018: Welcome EVEN senior Yiqun Yao to the group!

Sept 2018: Welcome M.S. studentsMelanie Warren and Leah Flint to the group!

Aug 2018: Prof. Korak joins the Civil, Environmental, and Architectural Engineering Department at the 91Ҹ 91Ҹ