CURRICULUM VITAE

​​Eric Warren Pimentel Vejerano

​​Assistant Professor     Environmental Nanoscience and Risk
EDUCATION

Ph. D.
Louisiana State University│2011│ Baton Rouge, LA, USA
Chemistry
Dissertation: Formation and Stabilization of Combustion-Generated Environmentally Persistent Free Radicals on Silica Surface

B.Sc.
University of the Philippines Los Baños │1999 │Philippines
Agricultural Chemistry
Thesis: Modification of the Rapid test Kit Method for Detecting Organophosphate and Carbamate Pesticides Using Enzyme-Inhibition Technique

ACADEMIC APPOINTMENT

Sept. 2011- Nov. 2015
Postdoctoral Associate
Department of Civil and Environmental Engineering
Virginia Tech│Blacksburg, VA


RESEARCH/PROFESSIONAL/INDUSTRY/GOVERNMENT EXPERIENCE

GCMS  SCIENTIST │November  2015-July 2016                     
RESEARCH AND DEVELOPMENT │OIL AND GAS DIVISION
AUTHENTIX INC│Addison, TX

POSTDOCTORAL ASSOCIATE │September 2011-Present                     
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
VIRGINIA TECH │Blacksburg, VA

RESEARCH ASSISTANT │October 2006-May 2011                 
DEPARTMENT OF CHEMISTRY
LOUISIANA STATE UNIVERSITY │Baton Rouge, LA

SENIOR SCIENCE RESEARCH SPECIALIST│February 2005 – June 2005
DEPARTMENT OF SCIENCE AND TECHNOLOGY │Republic of the Philippines

TEACHING EXPERIENCE
TEACHING ASSISTANT │August 2005 – August 2009
DEPARTMENT OF CHEMISTRY
LOUISIANA STATE UNIVERSITY │ Baton Rouge, LA

VOLUNTEER TEACHER │June 1999-March 2000
UNIVERSITY OF THE PHILIPPINES-UGANAYAN NG PAHINUNGOD/DEPARTMENT OF EDUCATION│PHILIPPINES

VOLUNTEER TEACHER-FACILITATOR│September 2003-June 2004
PAMANAKA │ PHILIPPINES

TEACHER│2002
PHILIPPINE SCIENCE HIGH SCHOOL │PHILIPPINES

PEER-REVIEWED PUBLICATIONS

1.                  Vance, M.E., Kuiken, T., Vejerano, E.P., McGinnis, S.P., Hochella, M.F. Jr., Rejeski, D., Hull, M.S. (2015). Nanotechnology in the Real World: Redeveloping the nanomaterial consumer product inventory. Beilstein Journal of Nanotechnology. 6, 1769-1780.

Highlights. The Nanoconsumer Product Inventory database is one of the most cited databases in peer-reviewed literature. The database catalogues consumer products containing nanomaterials or employing nanotechnology in their manufacture. The database was updated by adding new categories to enhance its utility and the validity of the information it contained.

2.  Vejerano, E.P., Ma, Y., Holder, A.L., Pruden, A., Subbiah, E., and Marr, L.C. (2015). Toxicity of particulate matter from nanowaste incineration. Environmental Science: Nano. 2, (2), 143-154. JOURNAL INSIDE FRONT COVER

Highlights. Investigates the toxicity and oxidative potential of PM emitted  by incinerated waste containing nanomaterials.  In most cases, nanomaterials in the waste do not significantly affect the oxidative potential of PM.The presence of these seven nanomaterials at low concentrations in the waste stream is not expected to exacerbate the hazard posed by PM that is produced by incineration.

3.  Apoorva, G., Akbar, M., Vejerano, E.P., Narayanan, S., Nazhandali, L., Marr, L.C., and Agah, M. (2015). Zebra GC: A mini gas chromatography system for trace-level determination of hazardous air pollutants.  Sensors & Actuators B: Chemical.  Sensors & Actuators B: Chemical. 212, 145–154.

Highlights. Novel micro-gas chromatograph (μGC) architecture leverages monolithically integrated separation column and thermal conductivity detector. A method to perform highly sharp injections from preconcentrator that is compatible with flow-sensitive detector is developed. The prototypal μGC is tested for detecting hazardous air pollutants in gasoline.

4..Ma, Y., Metch, J.W., Vejerano, E. P., Miller, I.J., Leon, E.C., Marr, L.C., Vikesland, P.J. Pruden, A. (2014). Microbial community response of nitrifying sequencing batch reactors to silver, zero-valent iron, titanium dioxide and cerium dioxide nanomaterials.  Water Research. 2015. 68, (0), 87-97.

Highlights. Nitrification function of microbial community unaffected by NanoAg, NZVI, nanoTiO2 and nanoCeO2 from 0.1 to 20 mg/L. Distinct effects of nanoAg and Ag+ on microbial community structure decrease microbial diversity and abundance of gene markers responsible for nitrification.

5.  Ma, Y., Elankumaran, S., Marr, L.C., Vejerano, E.P., Pruden, A. (2014). Toxicity of engineered nanomaterials and their transformation products following wastewater treatment on A549 human lung epithelial cells.  Toxicology Reports, 1, (0), 871-876.

Highlights. Pristine nanomaterials exhibit different extent of cytotoxicity and genotoxicity to A549 cells. Following wastewater treatment, nanomaterials are not cytotoxic or genotoxic  to A549 cells

6.   Tiwari, A. J., Morris, J. R., Vejerano, E.P., Hochella, M.F., Marr, L.C. (2014). Oxidation of C60 aerosols by atmospherically relevant levels of O3. Environmental Science & Technology 48, (5), 2706-2714. 

Highlights. Reaction between aerosolized C60 and atmospherically relevant mixing ratios of O3 at differing levels of relative humidity under ambient conditions forms a variety of oxygen-containing functional groups on the aerosol surface. Exposure to O3 increases the oxidative stress exerted by the C60 aerosols.

7.   Vejerano, E.P., Leon, E.C., Holder, A. L., Marr, L.C. (2014). Characterization of particle emissions and fate of nanomaterials during incineration. Environmental Science: Nano 1, (2), 133-143. JOURNAL COVER

Highlights. Investigates the emissions of particulate matter (PM) and the effect of incineration on nanomaterials. Added nanomaterials do not affect particle number emission factor.  Only at high mass loading of nanomaterials shifts PM size distribution to smaller size. Small amounts of the nanomaterials (0.023–180 mg/g of nanomaterial) partitions into PM while the majority remains in the bottom ash retaining their original size and morphology but form large aggregates.

8.   Holder, A.L., Vejerano, E. P., Zhou, X., Marr, L.C. (2013). Nanomaterial disposal by incineration. Environmental Science: Processes & Impacts 15, 1652-1664.

Highlights. The review ascertains the potential pathways by which nanomaterials in the waste streams may enter incinerators and their fate during incineration.

8.   Vejerano, E.P., Holder, A.L., Marr, L.C. (2013) Emissions of polycyclic aromatic hydrocarbons, polychlorinated dibenzo-p-dioxins, and dibenzofurans from incineration of nanomaterials. Environmental Science & Technology 47, (9), 4866-4874.

Highlights. Examines the formation of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated-dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from incineration of waste containing various nanomaterials. Addition of nanomaterial in waste results in higher emissions of some PAH species and lower emissions of others, depending on the type of waste. The total PAH emission factors are on average ∼6× higher for waste spiked with nanomaterials v. their bulk counterparts. Chlorinated dioxins are not detected from incineration of poly(vinyl chloride) (PVC) waste; however, elevated concentration of chlorinated furans forms with wastes containing silver and titania nanomaterials.

9.   Vejerano, E.P., Lomnicki, S., Dellinger, B. (2012). Formation and stabilization of combustion-generated, environmentally persistent free radicals (EPFRs) on Ni(II)O supported on a silica surface. Environmental Science & Technology 46, (17), 9406-9411.
Highlights. Investigates the formation and stabilization of EPFRs on a Ni(II)O surface.  Phenoxyl-type radical, with g-value between 2.0029 and 2.0044, and a semiquinone-type radical, with g-value from 2.0050 to as high as 2.0081 form.  Long half-lives of EPFRs on Ni(II)O ranges from 1.5 to 5.2 days. Yields of  EPFRs formed on Ni(II)O are ∼8× higher than on Cu(II)O and ∼50× higher than those on Fe(III)2O3.

10.   Vejerano, E.P., Lomnicki, S., Dellinger, B. (2012). Lifetime of combustion-generated environmentally persistent free radicals on Zn(II)O and other transition metal oxides. Journal of Environmental Monitoring. 14, (10), 2803-2806.

Highlights. EPFRs on Zn(II)O are the most persistent with half-lives ranging from 3 to 73 days compared to those on different transition metal oxides. The half-life of EPFRs correlates with the standard reduction potential of the transition metal.

12.   Vejerano, E.P., Lomnicki, S., Dellinger, B. (2011) Formation and stabilization of combustion-generated environmentally persistent free radicals on an Fe(III)2O3/silica surface. Environmental Science & Technology 45, (2), 589-594.
Highlights. A phenoxyl-type radical with g-value of 2.0024−2.0040, and a second semiquinone-type radical, with a g-value of 2.0050−2.0065 form on Fe(III)2O3 surface.  Yields of EPFRs were ∼10× lower for iron than copper. Half-lives of EPFRs on iron ranges from 24 to 111 h, compared to the half-lives on copper which have half-lives ranging from 27 to 74 min.

13.    Khachatryan, L., Vejerano, E.P., Lomnicki, S., Dellinger, B. (2010) Environmentally persistent free radicals (EPFRs). 1. Generation of reactive oxygen species in aqueous solutions. Environmental Science & Technology 45, (19), 8559-8566.

Highlights. Environmentally persistent free radicals (EPFRs) from 2-monochlorophenol on  Cu(II)O/silica particles form hydroxyl radical as detected by spin trapping and electron paramagnetic resonance  spectroscopy. EPFRs on Cu(II)O generate hydroxyl radical (•OH), superoxide anion radical (O2•–), and hydrogen peroxide (H2O2). EPFRs catalytically produces •OH radicals.

14.   Lomnicki, S., Truong, H., Vejerano, E.P., Dellinger, B. (2008). Copper oxide-based model of persistent free radical formation on combustion-derived particulate matter. Environmental Science & Technology 42, (13), 4982-4988.

Highlights. Environmentally persistent free radicals (EPFRs) form by adsorption of substituted aromatic compounds particles containing Cu(II)O at the post-combustion zone (100 and 400 °C) and may form on other transition metal oxide as well. Phenoxyl and semiquinone radicals form depending on the precursor and the adsorption temperature. EPFRs form via sequential physisorption, chemisorption, and  electron transfer mechanisms. Lifetimes of EPFRs'  under vacuum appear to be indefinite. 


CONFERENCE PROCEEDINGS & PRESENTATIONS

Marr, L.C., Pruden, A., Vejerano, E.P., Ma, Y., Elankumaran, S., Holder, A.L., Leon, E.C. Transformation and fate of nanomaterials during wastewater treatment and incineration, 9th International Conference on the Environmental Effects of Nanoparticles and Nanomaterials,  September 7-11, 2014, Columbia, South Carolina.

Ma, Y., Metch, J., Vejerano, E.P., Marr, L.C.,  and Pruden, A. Effects of nanomaterial disposal on wastewater treatment microbial communities and toxicity implications. 2012 Sustainable Nanotechnology Organization Conference. November 5-11, 2013, Santa Barbara, CA.

Vejerano, E.P, Dellinger, B., Marr, L.C., Holder, A.L. Leon, E.C. Environmentally persistent free radicals and nanomaterials as emerging environmental contaminant. 247th ACS National Award for Creative Advances in Environmental Science & Technology:  Symposium in Honor of Harold Bartlett Dellinger. March 16-20, 2014, Dallas, TX.

Vejerano, E.P., Ma, Y., Metch, J., Leon, E.C., Holder, A.L., Pruden, A., and Marr, L.C. Fate and transformation of nanomaterials during wastewater treatment and incineration, 2013 NSF Nanoscale Science and Engineering Grantees Conference. December 4-6, 2014, Alexandria, VA.

Vejerano, E.P., Holder, A.L., Marr, L.C. Emissions of polycyclic aromatic hydrocarbon, and polychlorinated dibenzo-p-dioxin and dibenzofurans from incineration of nanomaterials, 13th International Congress on Combustion By-Products and Their Health Effects. May 14-18, 2013, New Orleans, LA.

Vejerano, E.P., Holder, A.L., Marr, L. C. Oxidative stress potential of combustion-derived nanomaterial-containing particulate matter, 13th International Congress on Combustion By-Products and Their Health Effects. May 14-18, 2013, New Orleans, LA. 

Lomnicki, S., Kiruri, L., Vejerano, E.P., Dellinger, B. Lifetime and stability of environmentally persistent free radicals - What matters? Southwest Regional ACS Meeting. November 4-6, 2012, Baton Rouge, LA.

Marr, L.C., Pruden, A.J., Holder, A., Ma, Y., Vejerano, E.P., Transformation and fate of nanomaterials during wastewater treatment and incineration, Society of Environmental Toxicology and Chemistry (SETAC) 33rd Annual Meeting. November 11-15, 2012, Long Beach, CA.

Hull, M.S., Kuiken, T., Wong, A., McGinnis, S., Vejerano, E.P., Marr, L.C., Ewing, T., Rejeski, D., Hochella, M.F. Re-inventing the nanotechnology consumer products inventory through a university/NGO partnership, Sustainable Nanotechnology Organization Conference. November 4-6, 2012, Arlington, VA.

Vejerano, E.P., Holder, A.L., Marr, L.C. Fate of nanomaterials during combustion. American Association for Aerosol Research 31st Annual Conference. October 8-12, 2012, Minneapolis, MN.

Vejerano, E.P., Holder, A.L., Marr, L.C. Emission of PAHs from nanowaste incineration. Internal Meeting of the Center for Environmental Implications of Nanotechnology. Duke University. Durham, NC, March 2012.

Katchatryan, L., Vejerano, E.P., Lomnicki, S., and Dellinger, B. Environmentally persistent free radicals: Generation of reactive oxygen species in aqueous solutions. 12th International Congress on Combustion By-Products and their Health Effects. Zhejiang University, Zhejiang, China, June 2012.

Lomnicki, S., Vejerano, E.P., Dellinger, B. Transition metal ions and environmentally persistent free radicals. 12th International Congress on Combustion By-Products and Their Health Effects. Zhejiang University, Zhejiang, China, June 2012.

Lomnicki, S., Vejerano, E.P., Dellinger, B. Lifetime of combustion-generated environmentally persistent radicals on Zn(II)O  and other transition metal oxides Louisiana State University. 34th International Symposium on Combustion. July 29 - August 3, 2012, Warsaw, Poland.

Vejerano, E.P., Lomnicki, S., Dellinger, B. Formation and stabilization of environmentally persistent free radical on an Fe(III)2O3 on silica surface. Superfund Annual Meeting. November 2010, Portland, OR.

Vejerano, E.P., Lomnicki, S., Dellinger, B. Formation and stabilization of persistent free radical on Fe(III)2O3/silica surface. 11th International Congress on Combustion By-Products and Their Health Effects. June 2009, EPA, Research Triangle Park, NC.

Vejerano, E.P., Lomnicki, S., Dellinger, B. Formation and stabilization of persistent free radical on Cu(II)O/silica surface. 10th International Congress on Combustion By-products and Their Health Effects. June 5-7, 2007, Naples, Italy.

HONORS AND AWARDS

Article entitled “Characterization of Particle Emissions and Fate of Nanomaterials During Incineration” featured as journal front cover in Environmental Science: Nano │2014
Article entitled “Toxicity of Particulate Matter from Nanowaste Incineration” featured as journal inside front cover in Environmental Science: Nano │2015
National Science Foundation Travel Award to attend the 11th International Congress on Combustion By-products and Their Health Effects│June 2009│EPA Triangle Park, NC, USA
National Science Foundation Travel Award to attend the 10th International Congress on Combustion By-products and Their Health Effects│June 2007│Naples, Italy


PROFESSIONAL AFFILIATIONS
Member, American Association for the Advancement of Science│2014-2015
Member, American Chemical Society│2014-2015
Member, American Association for Aerosol Research│2014-2015
Member, Center for Environmental Implication of Nanotechnology│2014-2015
Member, Sustainable Nanotechnology Organization│ 2014-2015
Member, Virginia Tech Sustainable Nanotechnology│2014-2015
Member, Professional Regulatory Commission (Chemistry)│Philippines │2000-2005

​​Eric P. Vejerano