The Jun group is exploring the environmental impacts of human activities through improved understanding of the fate and transport of contaminants and nanoparticles. In particular, we aim to improve our understanding of the climate change impacts on water supply. We also are studying biogeological cycling in complex environmental systems from nanoscale to macroscale, with a view to conserving and restoring sound water environments.
In addition, our group is performing a comprehensive analysis of the potential risks associated with CO2 sequestration strategies to mitigate climate change and developing new treatment techniques and new catalysts for purifying drinking water and remediating contaminated water and soil.
To Solve Grand Challenges in Energy, Environmental and Chemical Engineering, We Need to Help Our Students Learn about...(click the text for more detailed information)
A Recent Picture of the Environmental NanoChemistry Lab members (Yi's farewell party, January 14, 2014)
NEW: Special symposium on "Theme 10C: “Starting is the hardest part: nucleation dynamics and phase transformations” at the 2014 Goldschmidt conference, June 08 – 13, Sacramento, California. Call for Abstracts
NEW: Special symposium on "Geochemistry and Reactive Transport in Shale Nanopores" in 2014 Spring American Chemical Society, March 16-20, 2014,
Dallas, Texas. Call for Abstracts
We had a Panel Discussion on March 17th from 4 PM to 6 PM in Dallas Convention Hall. The discussion minutes will be available soon.
Fall 2013- Spring 2014: Cool experiments and new learning! The Jun group works with Ms. Eberle, teacher at Brittany Woods Middle School, St. Louis, and Ms. Ruggirello, faculty at Washington University's Institute for School Partnership for developing science curriculum and implementing it in class. (Picture on February 12, 2014, Brittany Woods Middle School)
April 15, 2014: Congratulations! Our paper entitled “Interfacial Energies for Heterogeneous Nucleation of Calcium Carbonate on Mica and Quartz Substrates,” has been accepted to Environmental Science & Technology. This is Qingyun's first first-authored paper! Link to the paper
April 11, 2014: Congratulations to Dr. Yandi Hu! Yandi received a 2014 graduate research award of the Department of Eneregy, Environmental & Chemical Engineering. Yandi, we all are proud of you!
April 5, 2013: Qingyun, Doyoon, Lijie, and Prof. Jun gave hands-on workshop for female high school students to introduce environmental nanochemistry and environmental engineering (nanoparticle synthesis and its application and geologic CO2 sequestration), and talked about engineering career experience. This time, we introduced a newly built demonstration kit for geologic CO2 sequestration! This is as a part of the 2014 Women in Engineering event.
April 3, 2014: Congratulations to Chelsea! Chelsea has been invited to give a talk at Gordon Research Seminar just before Gordon Conference (Environmental Science: Water) in NH, June 2014.
March 28-29, 2014: Jessica will participate in the Edward A. Bouchet Graduate Honor Society Meeting at Yale University and she will be inducted to the society!
March 27, 2014: Congratulations to Althea! She is selected to receive a 2014 Summer Undergraduate Research Award! She will work on CeO2 dissolution in natural and engineered aquatic systems.
March 16-17, 2014: Prof. Jun gave two talks related to geologic CO2 sequestration and arsenic-iron (hydr)oxide nanoparticle interactions at the Spring 2014 ACS meeting in Dallas. She also organized and chaired the special symposium on "Geochemistry and Reactive Transport in Shale Nanopores" at this meeting and led a panel discussion on knowledge gaps and opportunities. Panel discussion minutes will be available soon.
March 12, 2014: Congratulations! Our paper entitled “Water Chemistry Impacts on Arsenic Mobilization and Secondary Mineral Precipitation from Arsenopyrite Dissolution: Implications for Managed Aquifer Recharge,” has been accepted to Environmental Science & Technology. The paper was chosen to be highlighted in the ES&T website! Link to the paper
March 11-13, 2014: Our group (Chelsea and Haesung) visited Bruker (Santa Barbara, CA) and got training for multiple applications of electrochemical atomic force microsocope (EC-AFM) systems. Using built-in potentiostat/galvanostat, our group's EC-AFM can tune experimental electrochemical (redox) conditions.
February 28-March 4, 2014: Our group (Jessica, Chelsea, Qingyun, Doyoon, and Haesung) travelled to the Argonne National Laboratory for synchrotron based x-ray beamtime: grazing incidence x-ray scattering (Sector 12ID-B).
February 27-28, 2014: Prof. Jun attend the Editorial Board meeting of the RSC's Environmental Science: Processes & Impacts, University of Toronto, Toronto, Canada.
February 7, 2014: Congratulations! Jessica is nominated to be the member of the Edward A. Bouchet Graduate Honor Society! The Edward Alexander Bouchet Graduate Honor Society (Bouchet Society) recognizes outstanding scholarly achievement and promotes diversity and excellence in doctoral education and the professoriate.
February 7, 2014: Congratulations to Yujia! He passed her Ph.D. proposal defense. Officially, Yujia earned his full Ph.D. candidacy.
January 27-February 1, 2014: Chelsea and Qingyun will visit the Lawrence Berkeley National Laboratory to work with Dr. Carl Steefel. During their stay, they will learn about CRUNCHFLOW reactive transport model.
January 22, 2014: The Jun Group Meeting resumes (4:15-6:00 PM, Every Monday), Brauer Hall 3015. Please see our group meeting schedule.
January 20, 2014: Congratulations to Jessica! Jessica has been selected as a winner of the 2014 Graduate Student Awards in Environmental Chemistry in the Division of Environmental Chemistry of the American Chemical Society.
January 14, 2014: Dr. Yang, Congratulations and Best Wishes!
We had a farewell party for Yi. Best wishes! Dr. Yi Yang accpeted his postdoctoral position to work with Prof. Susan. L. S. Stipp in the NanoGeoScience Group at the University of Copenhagen (Danmark) for his postdoctoral work. Dr. Yang is our proud Ph.D. alumnus of the ENCL group.
January 10, 2014: Congratulations! Prof. Jun was elected to be the Program Chair-Elect of the American Chemical Society's Geochemistry Division.
January 4, 2014: Congratulations! Haesung got married! Best wishes for the newly married couple!
December 6-14, 2013: Prof. Jun travelled to Seoul, Korea to visit the Seoul National University (SNU) to promote the Washington University's McDonnell International Academy. Prof. Jun is the McDonnell Academy Ambassador to SNU. Prof. Jun also visited Yonsei University (Seoul, Korea). During her visit, she also gave an invited seminar.
December 2, 2013: Congratulations! Our paper entitled “Aluminum Affects Heterogeneous Fe(III) (Hydr)oxide Nucleation, Growth, and Ostwald Ripening,” has been accepted to Environmental Science & Technology. Link to the paper
November 22, 2013: Congratulations to Qingyun! She passed her Ph.D. proposal defense! Officially, Qingyun earned her full Ph.D. candidacy! Keep it up good work!
November 22, 2013: Prof. Jun and our group were introduced in Engineering Momentum Magazine! Link to the magazine
November 9, 2013: Welcome to Environmental Enginering! Jessica, Chelsea, Qingyun, Yujia, Doyoon, Lijie, Haesung, and Prof. Jun offered a multi-module learning lab “Moving and Shaking” for students in grades 6-8. During this program, we ran four learning modules related to water treatments, climate change, and ocean acidification.
October 29, 2013: Congratulations! Our paper entitled “Effects of Al/Si Ordering on Feldspar Dissolution: Part II. The pH Dependence of Plagioclases’ Dissolution Rates,” has been accepted to Geochimica et Cosmochimica Acta.
October 29, 2013: Congratulations! Our paper entitled “Effects of Al/Si Ordering on Feldspar Dissolution: Part I. Crystallographic Control on the Stoichiometry of Dissolution Reaction,” has been accepted to Geochimica et Cosmochimica Acta.
August 21, 2013: Congratulations! Our paper entitled "Mechanistic Understanding of Plagioclase Dissolution Based on Al-occupancy and T−O Bond Length: From Ambient to Geologic Carbon Sequestration Conditions" has been accepted to Physical Chemistry Chemical Physics. This work presented predictions of dissolution of plagioclase under geologic carbon sequestration and ambient conditions and compared with experimental data! Link to the paper
August 1, 2013: Welcome! Professor Youn Sang Kim joined our group for his sabbatical research. Professor Kim is Associate Professor in the Department of Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University (South Korea). His group has extensive experiences in nanostructure fabrication using lithography techniques.
July 22, 2013: Congratulations! Our paper entitled "Control of Heterogeneous Fe (III) (Hydr)oxide Nucleation and Growth by Interfacial Energies and Local Saturations," has been accepted to Environmental Science & Technology. Link to the paper
July 18-19: Prof. Jun was invited to present at the DOE's Energy Frontier Research Center PI's meeting, Washington, DC. The image credit: DOE-EFRC
July 1, 2013: Prof. Jun provided an invited lecture on Nanochemistry, Nanotechnology, and the Environment for high school students and teachers in St. Louis as a part of Students and Teachers as Research Scientists (STARS) program, at the University of Missouri-St. Louis, St. Louis.
June 18th, 2013: We purchased a new ion chromatography (Dionex ICS-1600) for anions and organic acid concentration measurements. We appreciate the support from the Consortium for Clean Coal Utilization.
June 14, 2013: Best Wishes to Dr. Hu! Dr. Hu will start her tenure track faculty position in the Department of Civil and Environmental Engineering at the University of Houston on July 15. We had a farewell BBQ party for Yandi. Well done and Best wishes!
June 3, 2013: Two of our group articles were selected as Top 10 Most Read Articles in Q1 2013 Environmental Science & Technology. (1) Environmental and Geochemical Aspects of Geologic Carbon Sequestration: A Special Issue and (2) Impacts of Geochemical Reactions on Geologic Carbon Sequestration
May 30-June3, 2013: Our group travelled to the Argonne National Laboratory for synchrotron based x-ray beamtime: grazing incidence x-ray scattering (Sector 12ID-B). (left to right) Haesung, Doyoon, Qingyun, Jessica, and Chelsea. This is the first beamtime trip for Haesung and Doyoon.
May 17, 2013: Congratulations! Yi and Yandi walked on the commencement day. Yandi defened her Ph.D. thesis this month and Yi will defende his thesis in June. Congratulations and best wishes!
April 27, 2013: Prof. Jun became the McDonnell Academy's Ambassador to Seoul National University, Seoul, South Korea. "The McDonnell Academy Ambassadors are appointed by Chancellor Mark S. Wrighton to advise the Scholars and charged to strengthen collaboration with the partner universities. Collaborative efforts engage faculty and students of the University and those of the partner universities in various activities that enhance Scholarly interests and international understanding."
April 19, 2013: Congratulations to Jessica! As a part of the Ryckman Lecture and Earth Day Event, Jessica received a 2013 graduate research award of the Department of Eneregy, Environmental & Chemical Engineering. Ryckman Lecture speaker, Dr. Alvarez-Cohen, and Dr. Biswas presented the award to Jessica. Jessica, we all are proud of you!
March 1, 2013: Congratulations! The Chancellor Wrighton and Washington University's Board of Trustees approved Prof. Jun's promotion to associate professor with tenure.
(Present from the ENCL members)
February 23, 2013: Prof. Jun, Chelsea, and Doyoon gave hands-on demonstration for female high school students and teachers (>110 participants) to introduce environmental nanochemistry and environmental engineering (nanoparticles and managed aquifer recharge), and talked about engineering career experience. This is as a part of the 2013 Women in Engineering Day event.
February 21-22, 2013: Prof. Jun participated in an NSF Materials Genome Initiative sponsored workshop, Arlington, VA. The detailed information is available at the following websites. NSF MGI Workshop and the Whitehouse Website. A report about this workshop was published in Ceramic Tech Today. Photo credit: ACerS and De Guire.
January 18, 2013: Prof. Jun became the Director of Graduate Studies of the Department of Energy, Environmental & Chemical Engineering.
January 1, 2013: The special focus issue on Geologic Carbon Sequestration in Environmental Science & Technology was published on January 1st 2013. Prof. Jun served as the lead guest editor. The entire special issue is accessible free of charge.
January 1, 2013: Prof. Jun became an editorial board member for the Royal Society of Chemistry's Environmental Science: Processes & Impacts (Formerly the Journal of Environmental Monitoring).
December 20, 2012: Congratulations! Our paper entitled "Effects of Formation Conditions on the Physico-Chemical Properties, Aggregation, and Phase Transformation of Iron Oxide Nanoparticles," has been accepted to Langmuir. Link to the paper
November 16, 2012: Congratulations! Our paper entitled "Formation of Iron(III) Hydroxides on Polyaspartate- and Alginate-Coated SiO2: Effects of Substrate Hydrophilicity and Functional Groups at the Surface,” has been accepted to Environmental Science & Technology. Link to the paper
November 10, 2012: Welcome to Environmental NanoChemistry Lab! Jessica, Chelsea, Yi, Yujia, Qingyun, Doyoon, Lijie, James, and Prof. Jun offered a learning lab as a part of “Moving and Shaking: An Introduction to Engineering” for students in grades 6-8. During this program, we ran four learning modules related to water treatments and climate change.
November 6, 2012: Congratulations! Our feature article entitled "Impacts of Geochemical Reactions on Geologic Carbon Sequestration," has been accepted to Environmental Science & Technology. The authors are Drs. Young-Shin Jun, Daniel E. Giammar, and Charles J. Werth. Link to the paper
November 1, 2012: Our New Genergation Engineers! Sophomore undergraduate students had a tour to the Advanced Coal and Energy Research Facility as a part of ChE 351 course (Engineering Analaysis of Chemical Systems) and learned how to link what they learned in class to the real process units.
October 27, 2012: Yunke Liu and James Cooper (our undergraduate researchers) presented in the 2012 Fall Undergraduate Research Symposium. They got a lot of attentions from the visitors. Good job!
October 16-17, 2012: Prof. Jun participated in a National Science Foundation funded EarthCube Early Career Strategic Visioning Workshop at the Carnegie Institution for Science in Washington, D.C. The EarthCube is a bold initiative by the NSF to advance research and understanding of Earth systems through a robust cyberinfrastructure that enables cross-disciplinary science.
September 18, 2012: Congratulations! Our paper entitled "Biotite Dissolution in Brine at Varied Temperatures and CO2 Pressures: Its Activation Energy and Potential CO2 Intercalation," has been accepted to Langmuir. Link to the paper
September 14, 2012: Congratulations! Our paper entitled "Structure-Dependent Interactions between Alkali Feldspars and Organic Compounds: Implications for Reactions in Geologic Carbon Sequestration," has been accepted to Environmental Science & Technology. Link to the paper.
September 1, 2012: Congratulations! Our group received a new grant from the National Science Foundation's Environmental Chemical Sciences Program.
July 1, 2012: Congratulations! Our group received a new grant from the Consortium for Clean Coal Utilization. Through this project, we will collaborate with Prof. Don Zhang (Peking University, China), Prof. Yun Moon Lim (Yonsei University, South Korea), and Prof. Ruben Juanes (MIT).
May 30, 2012: Congratulations! Our paper entitled "In situ Determination of Interfacial Energies between Heterogeneously Nucleated CaCO3 and Quartz Substrates: Thermodynamics of CO2 Mineral Trapping," has been accepted to Environmental Science & Technology. This article was chosen as one of featured research papers in the ES&T website. Link to the paper
May 22, 2012: Congratulations! Our paper entitled "Arsenic Mobilization and Attenuation by Mineral-Water Interactions: Implications for Managed Aquifer Recharge" has been accepted to the special issue for “2012 Emerging Investigators” of Journal of Environmental Monitoring. Link to the paper
and Link to the 2012 Emerging Investigators' Profile (Please look at pages 3-4 for Prof. Jun's interview)
May 4, 2012: Congratulations! Our paper entitled “Na+, Ca2+, and Mg2+ in Brines Affect Supercritical CO2–Brine–Biotite Interactions: Ion Exchange, Biotite Dissolution, and Illite Precipitation” has been accepted to Environmental Science & Technology. Link to the paper
April 27, 2012: Congratulations! Our DOE-EFRC collaboration project paper has been accetped to Geochimica et Cosmochimica Acta. The title of the paper is "Energetic and structural studies of the amorphous Ca1-xMgxCO3 • nH2O (0 ≤ x ≤ 1) systems." Link to the paper
April 25, 2012: Congratulations! Our GISAXS paper on "Environmentally Abundant Anions Influence the Nucleation, Growth, Ostwald Ripening, and Aggregation of Hydrous Fe(III) Oxides" has been accepted to Langmuir. Link to the paper
February 25, 2012: Prof. Jun and Jessica gave hands-on demonstration for female high school students (61 participants) to introduce environmental nanochemistry and nanotechnology, environmental engineering, and talked about engineering career experience. This is as a part of the 2012 Women in Engineering Day event. We hope that two Nano moles' efforts can encourage many young nano moles' career in engineering in the future! (FYI, a mole is the mascot of the American Chemical Society)
December 2, 2011: Congratulations! Our paper entitled as“Supercritical CO2–Brine Induced Dissolution, Swelling, and Secondary Mineral Formation on Phlogopite Surfaces at 75–95oC and 75 atm” has been accepted to Energy & Environmental Science.
October 7-8, 2011: Prof. Jun was invited to participate the NSF sponsored SEES (Science, Engineering and Education for Sustainability) Workshop on Natural and Engineered Carbon Sequestration, Minneapolis, Minnesota.
September 13, 2011: Congratulations! Daniel Garcia's research paper has been chosed to be one of three feature articles among more than 200 student papers in Undergraduate Research Digest.
September 12, 2011: Congratulations! Our paper entitled as "Effects of Organic Ligands on Supercritical CO2-Induced Phlogopite Dissolution and Secondary Mineral Formation," has been accepted to Chemical Geology. Link to the paper.
• Phlogopite dissolution is affected by organic ligands under GCS conditions.
• Organic ligands alter brine’s pH and form surface complexation with phlogopite.
• Supercritical CO2 extracted monocarboxylic acid from saline water.
|September, 1, 2011: Congratulations to Prof. Jun! She received the NSF CAREER Award. More detailed information|
"The Faculty Early Career Development (CAREER) Program is a Foundation-wide activity that offers the National Science Foundation's most prestigious awards in support of junior faculty who exemplify the role of teacher-scholars through outstanding research, excellent education and the integration of education and research within the context of the mission of their organizations. Such activities should build a firm foundation for a lifetime of leadership in integrating education and research." from www.nsf.gov
August 8, 2011: Congratulations! Our paper entitled as "The Effects of Initial Acetate Concentration on CO2–Brine–Anorthite Interactions under Geologic CO2 Sequestration Conditions," has been accepted to Energy & Environmental Science. Link to the paper.
Acetate decreases the cumulative aqueous metal concentrations upon CO2 injection by inhibiting anorthite dissolution and facilitating secondary mineral precipitation.
June 2, 2011: Congratulations! Our paper entitled as "Biotite–Brine Interactions under Acidic Hydrothermal Conditions: Fibrous Illite, Goethite, and Kaolinite Formation and Biotite Surface Cracking," has been published to Environmental Science & Technology. Link to the paper
March 28, 2011: Prof. Jun organized a special symposium on "Environmental and Geochemical Aspect of Sustainable Waster Reuse" with Dr. Jeffrey Yang (U.S. EPA) at the 241th American Chemical Society Spring National Meeting in Anaheim, California. This symposium has been chosen as one of Chemical & Engineering News (C&EN) Picks. The video is produced by the American Chemical Society. During this symposium, Chelsea successfully presented her first oral presentation at ACS meeting! Congratulations, Chelsea!
C&EN Picks: Anaheim Edition (March 28th, 2011) from ACS Pressroom on Vimeo.
* In the April 25 issue of C&EN, our symposium was introduced. Please click the following link if you want to review the report. (pages 38-39).
January 13, 2011: Congratulations! Our collaboration paper with researchers in biomedica engineering and the school of medicine has been published to Journal of the Royal Society Interface. This paper is entitled as “Nanogel Surface Coatings for Improved Single-Molecule Imaging Substrates” Link to the paper
December 28, 2010: Congratulations! Our paper entitled as “Effects of Salinity and the Extent of Water on Supercritical CO2-Induced Phlogopite Dissolution and Secondary Mineral Formation,” has been published to Environmental Science & Technology. Link to the paper.
Both salinity and the extent of water affect the interactions of CO2, saline water, and clay minerals, and potentially influence the fate and transport of CO2.
October 21, 2010: Congratulations! Our paper entitled as “Viability and Metal Reduction of Shewanella Oneidensis MR-1 under CO2 stress: Implications for Ecological Effects of CO2 Leakage from Geologic CO2 Sequestration,” has been published to Environmental Science & Technology. Link to the paper.
CO2 leakage to shallow groundwater and soil/sediments from geologic CO2 sequestration sites influences the viability and metal reduction of Shewanella oneidensis MR-1.
September 15, 2010: Congratulations! Our paper entitled as "In Situ Observations of Nanoparticle Early Development Kinetics at Mineral-Water Interfaces" has been published to Environmental Science & Technology.
Using x-ray scattering, this study quantitatively and qualitatively monitors highly amorphous iron oxide nanoparticles’ formation and morphology evolution in real time. Link to the paper
June 4, 2010: Congratulations, Dr. Shao and Jessica! Our paper entitled as "Dissolution and Precipitation of Clay Minerals under Geologic CO2 Sequestration Conditions: CO2-Brine-Phlogopite Interactions" has been published in Environmental Science & Technology. Link to the paper
Environmental NanoChemistry Course (EECE 534) will be offered in every spring semester. Please click the below link to see more detailed information.
Our research group interests
Chemical kinetics, thermodynamics, and mechanisms of environmental interfacial reactions.
Reactions at dynamic water-mineral interfaces: dissolution/precipitation, adsorption/desorption, passivation/activation, relaxation/reconstruction, and reduction/oxidation.
A more comprehensive analysis of the risks associated with CO2 geologic sequestration strategies related to climate changes.
Sustainable engineering solutions to alleviate the climate change impacts on water supply.
Physico-chemical reaction mechanisms during aquifer storage, treatment, and recovery using water reuse to secure underground sources for drinking waters (USDWs).
Scaling up from microscopic to macroscopic observations in aqueous systems.
Development of new environmental catalysts for remediating contaminated water and soils.
Heavy metal adsorption and incorporation to manganese (hydr)oxides.
Structure, reactivity, and antimicrobial activity of iron and manganese oxide nanoparticles in aqueous systems.
Mechanisms of oxide film growth at nanoscale in aqueous systems.
Structure and reactivity of oxide thin films on mineral surfaces.
Effects of organic compounds and microbial biofilm on mineral dissolution/precipitation.
Biomineralization and bio-inspired chemistry.