University of California, Riverside

Environmental Particle Fate and Transport Lab

News and Photos Archive 2005-2015

In The News:

Dr. Walker’s lab group has been receiving a lots of interest regarding their research on bacterial adhesion and food safety. Please see the links below to learn more. 

  1. YouTube:
  2. UCR Promise:

Dr. Walker’s lab group has been receiving a lot of press coverage recently (April-May 2014) regarding their research on “The Fate and Transport of Graphene Oxide Nanoparticles in Groundwater and Surface Water Environments”. Please see below for some of the coverage they have been receiving.

Radio Interviews:

  1. KPCC (89.3)
  2. Canada Broadcasting Channel (CBC):

Web or Magazine Articles Written:

  1. Scientific American 
  2. IEEE Spectrum:'
  3. Forbes:
  4. Scottish EPA
  5. OnEarth
  6. TheWatchers:
  7. UCR Today:
  8. Geographyandyou:
  9. Gigaom:
  10. Slashdot:
  11. Gizmodo:


Jacob Lanphere is the Chair for the upcoming “Environmental Nanotechnology” Gordon Research Seminar that will be held from June 20-21st, 2015 and will be located in West Dover Vermont. More information can be found here Link:

Dr. Walker is the Vice-Chair for the “Environmental Nanotechnology” Gordon Research Conference that will be held from June 21-26th, 2015 and will be located in West Dover Vermont. More information can be found here Link:

Congratulations to Dr. Lanphere and Dr. Honda, Graduation 2014



Jacob Lanphere was awarded the 2014 Graduate Student Award in Environmental Chemistry by the American Chemical Society. Link:

Corey Luth was awarded the ACS Division Environmental Chemistry 2013 Undergraduate Award. Link:

Jacob Lanphere was awarded the Certificate of Merit for “Outstanding Material Content and Manner of Presentation”  at the 245th ACS National Meeting, New Orleans, LA  by the American Chemical Society, Environmental Chemistry Division.

Dr. Walker hosted the 87th Colloid and Surface Science Symposium at UCR, June 23-26th. To learn more about the meeting, read the article here.

Walker LAb Team Building
The 2013 Walker lab spent the day together doing a ropes course and team building. A team that plays together works hard together!


Dr. Marcus, a recent graduate of the Walker lab, was the subject of an article in UCR Today. His work on pathogens in the human colon, septic systems, and groundwater is getting attention! Full Story.
Dr. Marcus’ PhD work with Dr. Walker has also been covered on CNETKPBS and a Scientific American blog.

Alicia Taylor presents her work on nanoparticles and hairdryers at the 33rd Annual SETAC North American Meeting, November 2012.

Alicia Taylor presents her poster at SETAC

The UCR contingent at the National Water Research Institute's Clark Prize Conference, November 2, 2012

2012 Clark Prize

Pictured here are Dr. Matsumoto, Dr. Walker, and Dr. Jassby with their PhD students along with the 2012 Clark Prize winner Dr. Pedro Alvarez, Dr. George Tchabanoglous and Dr. Menachem Elimelech . Dr. Tchabanogluous and Dr. Elimelech are previous Clark Prize winners.

Dr. Walker assists in honoring recent NWRI Fellows at the 2012 Clark Prize Conference

2012 Clark Prize

(L to R), NWRI Director Jeff Mosher, UCLA PhD student Kari Varin, Syracuse University Assistant Professor Doug Call, and Dr. Walker who was one of the original NWRI fellows

Walker group @ the 2012 Spring ACS Conference

2012 Spring ACS Conference

(L to R), Alicia Taylor, Jake Lanphere, Sharon Walker, and Indranil Chowdhury

Dr. Walker, in her role as co-PI of UCR’s NSF Advance grant, chimes in on the issue of women in STEM fields. Read more about the issue of gender bias in STEM hiring here.

Women In Science And Engineering

The Society of Women Engineers (SWE) chapter at UCR hosts Girl Scouts as part of Bourns Space Science and Engineering Day. SWE-UCR also hosts Scouts with programs such as Minds for Design. This upcoming spring SWE-UCR will host the Bourns Space Science and Engineering Day on April 18, 2009. For more information about SWE-UCR please visit

For more news and photos, please click here: Read More



UCR reunion @ the 2011 AEESP Conference

UCR Reunion at AEESP Conference

(L to R)Matt Yates, Sharon Walker, and Berat Haznedaroglu.

UCR Reunion @ Yale

UCR Reunion at Yale

UCR reunion at Yale, October 2011: Indranil, James and Berat (current Walker PhD student, previous Walker undergrad researcher and Yale PhD student, and previous Walker PhD student and Yale post-doc, respectively).

Congratulations to Dr. Amy Gong for her successful defense (August 2011)!

Summer 2011 Undergraduate Team present their research at the annual MSRIP Summer Research Symposium, August 2011


Hailey explaining poster.


Hailey explaining poster.


Jose Explaining poster


Liz explaining poster to group


Liz with Poster


Louise explaining Research to group


Louise with poster.


Shanin explaining poster.


Shanin with Poster


Steve explaining poster to group


Steve with Poster


Tyler explaining research to group


Tyler with Poster

  • HaileyGroup
  • HaileySolo
  • JoseGroup
  • LizGroup
  • LizSolo
  • LouiseGroup
  • LouiseSolo
  • ShaninGroup
  • ShaninSolo
  • SteveGroup
  • SteveSolo
  • TylerGroup
  • TylerGroup

Dr. Walker was recently interviewed by the Press Enterprise about her Fulbright in Israel and her new USDA-funded collaboration with Ben Gurion University. Read the article here.

Dr. Walker was recently interviewed for the Israeli edition of Scientific American (August, 2010). The Hebrew article can be found here. The English translation can be downloaded here


Walker Lab Summer 2010


Walker Lab Summer 2009


Dr. Walker was interviewed by the Jerusalem Post about her water research and Fulbright experience. See the transcript of this interview here (1/10).

Congratulations to Dr. Berat Haznedaroglu for his successful defense! (December 2009)

Celebrating Dr. Nick Kim and Dr. Gexin Chen’s PhD Defenses, August 2009

Long overdue celebration of awards in the Walker group!

Berat Haznedarolgu has received the 2009 International Scholarship Award by the Phi Beta Kappa Alumni (Alpha Association) of Southern California! It is an award to assist international graduate students towards the completion of their studies in the US.

Amy Gong received the 2009 Academic Excellence Award for a Graduate Student from the Women's Resource Center at UCR!

Nick Kim received a 2009 UCR Graduate Division Dissertation Fellowship!

Gexin Chen received a 2009 UCR Graduate Division Dissertation Scholarship!

Nick Kim recieved the 2009 Krieger and Stewart Graduate Student Award for Water Research!

Dr. Walker was interviewed about issues of women in STEM fields. See the transcript of this interview here (1/09).

Our research efforts have hit the airwaves!  See the transcript and listen to our blurb here(9/08).

Dr. Walker and the Building Bridges Program are in the USDA news! See the article here (8/08).

Dr. Walker and the 2007-2009 Building Bridges Program Participants Juan Lucio, Yasmine Salas, Karynn Kirby, and Melissa Reimer were in the University of California Science News.  See the video and read the transcript here!

Well Done Everyone!


Dr. Walker participates in Highgrove Elementary School's Career Day (11/2008)

Pictured below is Dr. Walker with some curious 2nd and 3rd grade future engineers...

Juan Lucio, a 2007-2008 Participant in the Building Bridges Program was in the news. Check out the article in the Press Enterprise here.

Dr. Walker has received a NSF Undergraduate Research and Mentoring grant entitled MY BEST @ UCR, Mentoring Year-round in Biological Engineering, Science and Technology. This grant will fund UCR and RCC undergraduate student research starting in the summer of 2008. Read more about the program here or in this Press Enterprise article. Information on how to apply can be found at:

Dr. Walker has received a USDA grant to fund a project entitled Building Bridges Across Riverside through Water Quality Research in collaboration with Riverside Community College. More information is available on the project website. This project was recently in the news. For the articles please click on this link.

Dr. Walker has received a USDA grant to fund a project in collaboration with the USDA Salinity Lab and the University of Utah. For more information click here.

Dr. Walker was interviewed by Jim Ness of Inland News Radio ( regarding the water quality challenges facing New Orleans in the aftermath of Hurricane Katrina (8/31/05). The interview aired on KVCR 91.9 can be heard here (please note the report is ~1 minute into the segment).

Department of Chemical and Environmental Engineering Undergraduate Graduation Celebration

June 14, 2008

Pictured below is Dr. Walker with '08 Graduates

Berat Makes the News:


On and off campus recognition for CEE graduate student


June 27, 2008

smasll Third-year Ph.D. student Berat Z. Haznedaroglu’s work has been recognized by Krieger & Stewart Inc.’s Fellowship Award and the Graduate Dean’s Dissertation Research Grant. Both awards will provide financial assistance to Berat for his ongoing research in the Department of Chemical and Environmental Engineering.

Berat is continuing doctoral studies in the Bacterial Adhesion Research Laboratory supervised by Dr. Sharon Walker. His work focuses on the fate and transport of bacterial pathogens in groundwater conditions, specifically understanding pathogenicity and transport behavior of Escherichia coli O157:H7 and Salmonella spp., both problematic in nation’s source water systems. This recognition of his work is especially timely in light of the current outbreaks of Salmonella across the country.

The Graduate Research Mentorship Programs (GRMP) are intended to enhance the mentoring of doctoral students during their second, third or fourth years of graduate study. Recipients are eligible for one, two or three quarters of support (including summers) to continue their research.

Founded in 1971 by Robert A. Krieger and Julian D. Stewart, Krieger & Stewart is a leading company providing civil and environmental engineering consulting services to numerous public agency clients throughout California, including cities, counties, redevelopment agencies, water and wastewater agencies, community services districts, parks and recreation districts, airport districts, and school districts.

Ten other BCOE students received Dissertation and GRMP fellowships, designed to provide a stipend and pay fees so the student may focus full-time on completing their dissertations. The selection process is rigorous, examining teaching experience, GPA, community involvement, strength of recommendation letters, and number of publications. Besides Haznedaroglu, Seung Kang, Jose Medina, Teddy Yap, Nissim Amos, Irene Calizo, Suchismita Ghosh, Alfredo Martinez-Morales, Zijun Fang, Jie Lian and Henry Vu were chosen to receive the prestigious fellowships.

Article from :

Congratulations Gexin on his marriage!

May 2008

Annual Biomedical Research Conference for Minority Students (ABRCMS)

November 2007, Austin, TX

Pictured below are Magda Benavides (summer 07 undergraduate research intern, currently a chemical engineering student at University of Maryland) and Maria Franco Aguilar (UCR Graduate Division and summer research program coordinator extraordinaire) at the ABRCMS conference. At this meeting Magda presented a poster of the work she conducted during the summer of 2007 at UCR in partnership with Amy Gong.

Visit to the University of Utrecht, The Netherlands, for Shiva and Saeed's MS and PhD Defenses (respectively)

October 2007

Pictured below is Dr. Walker, along with Shiva, Saeed, and their son Arman after Saeed's defense. Also pictured is the classic room in which the defense occurred. The final picture is of Dr. Walker with colleague Jan Willem Foppen (L) and his student Mohan Basnet (miiddle), from UNESCO-IHE in Delft, The Netherlands.


California's Water Town Hall, hosted by Huell Howser

Sept. 2007

Pictured below is Dr. Walker, Dr. and Mrs. Cwiertny, along with Huell Howser at the Town Hall event sponsored by the Association of California Water Agencies to discuss the developing water crisis in southern California and the state at large. More about Huell Howser and his educational programs on California and our water issues can be found here.

NSF REU Program BRITE Symposium

August 2007

Pictured below is Kathy Nguyen Huynh (our summer BRITE student) presenting her work at the end of the summer research symposium. More on Kathy's research can be found at

National Water Research Institute, Clarke Prize Lecture

July 2007

Pictured below is the Riverside research group along with the 2007 Clarke Prize Laureate, Dr. James Barnard.


American Chemical Society Colloid and Surface Science Symposium

June 2007

Pictured below is the Riverside gang. Front row (L to R): Dr. Walker and Dr. Scott Bradford (USDA Salinity Lab); back row (L to R): Nick, Gexin, and Saeed.

Pictured here are our colloid friends and collaborators (L to R) Marcin and Dr. Bill Johnson (both from the Univ. of Utah) as well as Allison and Dr. Qilin Li (both from Rice University)

Pictured here are additional colloid friends(L to R) Dr. Yan Jin (Univ. of Delaware), Dr. Scott Bradford, Dr. Huilian Ma (Univ. of Utah), and Saeed


American Society of Microbiology

May 2007

Berat Haznedaroglu and Amy Gong traveled to Toronto to participate in the annual ASM meeting. Pictured here Berat presents his poster.

Tyler Prize Banquet

April 2007

Professor Gatze Lettinga, creator of the Upflow Anaerobic Sludge Bed Reactor (UASB) system was awarded the 2007 Tyler Prize for Environmental Achievement. Pictured at this event are Dr. Walker and her long time mentor Professor Perry McCarty (2007 Stockholm Water Prize, 1997 Clarke Prize, and the 1992 Tyler Laureate).

Chemical and Environmental Engineering Department

Fall 2006

Holiday Dinner

December, 2006

The extended lab group, including (back row from L to R) Dr. Walker, Shiva, Amy, Gexin (with Arman), and Nick. Berat and Saeed (L to R) are in front.


Persian Feast

December, 2006

The extended lab group, including Scott and Simone Bradford, joined together for a fabulous Persian feast! Our youngest lab member, Arman (4 months), joined in as well.

AIChE National Meeting

November 2006

Dr. Walker enjoyed a reunion with her PhD Advisor, Meny Elimelech (middle) and previous labmate Jeff McCutcheon (left) at the AIChE meeting. Also, Dr. Walker and Nick (left) dined with Professor Vlad Tarabara and his group from Michigan State University.

Southern California Conference for Undergraduate Research (SCCUR)

November 2006

Dewi, DJ, and Jose presented their research at the annual SCCUR conference hosted at Occidental College, November 18th. They did a fantastic job!

Summer '06 Research Group

Summer 2006

Matt Yates from UC Davis and and Crystal Bray from UC Berkeley joined our group for the summer. Pictured here from left to right are Matt, Dr. Walker, Dr. Smith (in hat), Jose, DJ, Dewi, Crystal, Gexin, and Nick.

Our Newest Lab Member has Arrived!

August, 2006

Saeed and Shiva are pleased to announce the birth of their son Arman Torkzaban. He was born August 10th. Pictured on the left are the proud new parents. On the right is Dr. Walker, who happily gave Arman his first lesson on column experiments...

Research Group Beach Party

July 2006

Research Group End of the Year BBQ

June 2006

Dr. Matsumoto grilled up some great food for the group while Breanne demonstrated her new water quality game.

College of Engineering End of the Year Student Banquet

June 2006

The Society of Women Engineers (SWE) chapter at UCR presented Dr. Walker with this special advisor "hoodie".

Department of Chemical Engineering Advisory Board Meeting

May 2006

Berat, Gexin, and Nick presented the work of the research group to the visiting Advisory Board members.

American Society of Microbiology

May 2006

Gexin presented a poster of his research at the national ASM meeting in Orlando, Florida! Well done Gexin!

Engineering Faculty Honored

May 2006

Dr. Walker was honored along with engineering faculty members Yushan Yan, Cengiz and Mihri Oskan, and Marko Princevac (shown here with Dean Reza Abbaschian - in the middle) for awards won during the 2005-2006 academic year.

UC LEADS Symposium hosted at UC Santa Cruz

March 2006

Chris presented his research to interested faculty and talked "science" with other UC LEADS participants.

The Riverside UC LEADS participants.

Graduate Student Holiday Dinner

December 2005

Pictured from left to right: (front) Helen, Berat, Gexin (back) Nick, Shiva, Saeed, and Sharon (Saeed and Shiva are our visitors from the University of Utrecht)

Professor Craig Criddle's (Stanford Univ.) visit to UCR

December 9th, 2005

Southern California Conference for Undergraduate Research at UCR

November 19th, 2005

Bourns College of Engineering Industry Day

October 19, 2005

Pictures from our tour of the Inland Empire Utilities Agency's Desalting Plant...(hosted by UCR student and IEUA intern Gene McKinley and UCR alum Randy Lee)

and the Stringfellow Superfund Site

September 22, 2005


Pictures from the 17th Annual Summer Research Symposium at UC Riverside


Pictures from the group's fieldtrip to the Coachella Valley Water District

July 2005


More Information 

General Campus Information

University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

College Information

Bourns College of Engineering
Walker Research Group

Tel: (951) 827-6094
Fax: (951) 827-5696