Research Topics
| P WesterhoffSummaryAffiliation: Arizona State University Country: USA Publications
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Detail Information
Publications
Growth parameters of microalgae tolerant to high levels of carbon dioxide in batch and continuous-flow photobioreactorsPaul Westerhoff
Department of Civil and Environmental Engineering, Box 5306, Engineering Centre G Wing Room 252, Tempe, AZ 85287 5306, USA
Environ Technol 31:523-32. 2010..14 +/- 0.02 g C L(-1) d(-1). Reactor modelling indicated that a threshold of reactor size (i.e., HRT) an d reactor depth (path-length of light) exists based upon the optical density of the cells in the water column and their growth rates...- Occurrence and removal of titanium at full scale wastewater treatment plants: implications for TiO2 nanomaterialsPaul Westerhoff
School of Sustainable Engineering and the Built Environment, Civil, Environmental and Sustainable Engineering Program, Ira A Fulton Schools of Engineering, Arizona State University, Engineering Center, Tempe, AZ 85287 5306, USA
J Environ Monit 13:1195-203. 2011.... - Oxidation of organics in retentates from reverse osmosis wastewater reuse facilitiesPaul Westerhoff
Department of Civil, Environmental and Sustainable Engineering, Arizona State University, Tempe, AZ 85287 5306, USA
Water Res 43:3992-8. 2009..These results suggest that UV/TiO(2) plus biodegradation of RO retentates is feasible and would significantly reduce the organic pollutant loading into the environment from wastewater reuse facilities... 
Antimony leaching from polyethylene terephthalate (PET) plastic used for bottled drinking waterPaul Westerhoff
Department of Civil and Environmental Engineering, Arizona State University, Box 5306, Tempe, AZ 85287 5306, USA
Water Res 42:551-6. 2008..Still, the use of alternative types of plastics that do not leach antimony should be considered, especially for climates where exposure to extreme conditions can promote antimony release from PET plastics...- Electron pulse radiolysis determination of hydroxyl radical rate constants with Suwannee River fulvic acid and other dissolved organic matter isolatesPaul Westerhoff
Department of Civil and Environmental Engineering, Arizona State University, Box 5306, Tempe, Arizona 85287 5306, USA
Environ Sci Technol 41:4640-6. 2007..DOM* from hydrophobic acids exhibited broader absorbance spectra than transphilic acids, while wastewater DOM isolates had narrower DOM* spectra more skewed toward shorter wavelengths than did DOM* spectra for hydrophobic acids... - Seasonal occurrence and degradation of 2-methylisoborneol in water supply reservoirsPaul Westerhoff
Department of Civil and Environmental Engineering, Arizona State University, Box 5306, Tempe, AZ 85287 5306, USA
Water Res 39:4899-912. 2005..This was the magnitude change in MIB concentrations commonly observed after autumn thermal destratification of the reservoirs... - Fate of endocrine-disruptor, pharmaceutical, and personal care product chemicals during simulated drinking water treatment processesPaul Westerhoff
Department of Civil and Environmental Engineering, Box 5306, Arizona State University, Tempe, Arizona 85287 5306, USA
Environ Sci Technol 39:6649-63. 2005..Other compounds had low removals by all the WTP processes considered (atrazine, iopromide, meprobamate, TCEP), and removal processes capable of removing these types of compounds should be investigated... - Nitrate removal in zero-valent iron packed columnsPaul Westerhoff
Department of Civil and Environmental Engineering, Arizona State University, P O Box 5306, Tempe 85287 5306, USA
Water Res 37:1818-30. 2003..Different abiotic and microbial-mediated mechanisms may be involved during shorter- and longer-term operation of Fe(0) systems and the role of iron precipitates should be further evaluated... - Reactivity of natural organic matter with aqueous chlorine and bromineP Westerhoff
Department of Civil and Environmental Engineering, Arizona State University, ECG 252, Tempe, AZ 85287 5306, USA
Water Res 38:1502-13. 2004..Overall, the improved knowledge that bromine reacts faster and substitutes more efficiently than chlorine will be useful in developing strategies to control disinfection by-product formation during water treatment... - Fluorescence analysis of a standard fulvic acid and tertiary treated wastewaterP Westerhoff
Department of Civil and Environmental Engineering, Arizona State University, Tempe, USA
J Environ Qual 30:2037-46. 2001..g., rivers, lakes)... 
Removal of nitrate from groundwater by cyanobacteria: quantitative assessment of factors influencing nitrate uptakeQ Hu
Department of Civil and Environmental Engineering, Arizona State University, Tempe, Arizona 85287, USA
Appl Environ Microbiol 66:133-9. 2000..This result compares favorably with those reported for nitrate removal by other cyanobacteria and algae, and therefore effective nitrate removal from groundwater using this organism could be anticipated on large-scale operations...- Titanium nanomaterial removal and release from wastewater treatment plantsM A Kiser
Department of Civil, Environmental, and Sustainable Engineering, Arizona State University, Tempe, Arizona 85287 5306, USA
Environ Sci Technol 43:6757-63. 2009..is discharged (rivers, lakes, oceans) or biomass disposed (landfills, agriculture and soil amendments, incinerator off-gas or residuals) will increase our knowledge on the fate and transport of other nanomaterials in the environment.. - Stability and removal of water soluble CdTe quantum dots in waterYang Zhang
Department of Civil and Environmental Engineering, Arizona State University, Tempe, Arizona 85287 5306, USA
Environ Sci Technol 42:321-5. 2008..Divalent cations (Mg2+ and Ca2+) in tap water induce the formation of settleable QD flocs such that 70-80% of the QGDs by mass settle out... - Biosorption of nanoparticles to heterotrophic wastewater biomassMehlika A Kiser
School of Sustainable Engineering and the Built Environment, Arizona State University, P O Box 875306, Tempe, AZ 85287 5306, USA
Water Res 44:4105-14. 2010..Further study of carbonaceous NPs showed that different surface functionalities affect biosorption. Thus, the production and transformations in NP surface properties will be key factors in determining their fate in the environment... - The effect of carbon type on arsenic and trichloroethylene removal capabilities of iron (hydr)oxide nanoparticle-impregnated granulated activated carbonsAnne Marie Cooper
Environmental Technology, College of Technology and Innovation Arizona State University Polytechnic Campus, 6075 South Williams Campus Loop West, Mesa, AZ 85212, United States
J Hazard Mater 183:381-8. 2010..This tradeoff is related to several factors, of which changes in surface properties and pore size distributions appeared to be the most dominant... - Evaluation of extraction methods for quantification of aqueous fullerenes in urineTroy M Benn
School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287, USA
Anal Bioanal Chem 399:1631-9. 2011..g., blood, sweat, amniotic fluid) in toxicological studies, enabling a better understanding of the behavior of fullerenes in human and animal systems and facilitating a more comprehensive risk evaluation of fullerenes... - The release of nanosilver from consumer products used in the homeTroy Benn
School of Sustainable Engineering and the Built Environment, Arizona State Univ, PO Box 875306, Tempe, AZ 85287 5306, USA
J Environ Qual 39:1875-82. 2010..The quantities of silver in consumer products can in turn be used to estimate real-world human and environmental exposure levels... - Quantification of C60 fullerene concentrations in waterZhuo Chen
Department of Civil and Environmental Engineering, Arizona State University, Tempe, Arizona 85287 1604, USA
Environ Toxicol Chem 27:1852-9. 2008..This is the first publication on the application of extraction methods for nC60 from ultrapure and tap waters and determination of detection limits by LC/MS... - Nanoparticle silver released into water from commercially available sock fabricsTroy M Benn
Civil and Environmental Engineering, Arizona State University, Box 5306, Tempe, Arizona 85287 5306, USA
Environ Sci Technol 42:4133-9. 2008..However, the high silver concentration may limitthe disposal of the biosolids as agricultural fertilizer... - An approach for evaluating nanomaterials for use as packed bed adsorber media: a case study of arsenate removal by titanate nanofibersKiril Hristovski
Environmental Technology Laboratory, Arizona State University Polytechnic Campus, Mesa, AZ 85212, USA
J Hazard Mater 156:604-11. 2008.... - Oxidation of bisphenol A, 17beta-estradiol, and 17alpha-ethynyl estradiol and byproduct estrogenicityAbsar Alum
Department of Civil and Environmental Engineering, Arizona State University, Tempe, Arizona 85287-5306, USA
Environ Toxicol 19:257-64. 2004..Oxidation with ozone resulted in the rapid transformation of test compounds, reaching a stabilized estrogenic level in 10 min, whereas for chlorination it took more than 120 min for elicited estrogenicity to stabilize... - Intraparticle diffusion and adsorption of arsenate onto granular ferric hydroxide (GFH)Mohammad Badruzzaman
Department of Civil and Environmental Engineering, Box 5306, Arizona State University, Tempe, AZ 85287 5306, USA
Water Res 38:4002-12. 2004.... - Biosorption of humic and fulvic acids to live activated sludge biomassMario Esparza-Soto
Department of Civil and Environmental Engineering, Arizona State University, Engineering Center Room, ECG 252, Tempe, AZ 85287 5306, USA
Water Res 37:2301-10. 2003..These results showed that pH, divalent cation concentration and ionic strength play an important role in the fate and removal of influent wastewater HS in full-scale treatment plants... - Simultaneous removal of perchlorate and arsenate by ion-exchange media modified with nanostructured iron (hydr)oxideKiril Hristovski
Environmental Technology Laboratory, Arizona State University, 6075 S WMS Campus Loop W, Mesa, AZ 85212, United States
J Hazard Mater 152:397-406. 2008..Short bed adsorber (SBA) tests demonstrated that the mass transport kinetics for both ions are adequately rapid to permit simultaneous removal using HIX media in a fixed bed reactor... - HPLC-fluorescence detection and adsorption of bisphenol A, 17beta-estradiol, and 17alpha-ethynyl estradiol on powdered activated carbonYeomin Yoon
Department of Civil and Environmental Engineering, Arizona State University, ECG 252, Tempe, AZ 85287 5306, USA
Water Res 37:3530-7. 2003..This study confirms that PAC treatment is feasible for >99% removal of three estrogenic compounds from raw drinking waters that may be at risk for containing such compounds, at least at initial concentration of 500 ng/l and higher... - Dissolved organic nitrogen measurement using dialysis pretreatmentWontae Lee
Department of Civil and Environmental Engineering, Arizona State University, Tempe, Arizona 85287 5306, USA
Environ Sci Technol 39:879-84. 2005..Dialysis experiments using surface water spiked with different DIN/TDN ratios concluded that dialysis pretreatment leads to more accurate DON determination than no dialysis when DIN/TDN ratios exceed 0.6 mg of N/mg of N... - Selecting metal oxide nanomaterials for arsenic removal in fixed bed columns: from nanopowders to aggregated nanoparticle mediaKiril Hristovski
Environmental Technology Laboratory, Arizona State University Polytechnic Campus, 7001 East Williamsfield Road Building 50, Mesa, AZ 85212, USA
J Hazard Mater 147:265-74. 2007..1-0.5 min and Re x Sc=1000 and 2000. These SBA tests suggested that the binder has a negligible role in adsorbing arsenic and that mass transport is controlled by rapid intraparticle diffusion rather than external film diffusion... - Nitrogen enriched dissolved organic matter (DOM) isolates and their affinity to form emerging disinfection by-productsA Dotson
Department of Civil and Environmental Engineering, Arizona State University, Engineering Center G Wing, Room ECG 252, Tempe, AZ 85287, USA
Water Sci Technol 60:135-43. 2009..Other results indicated that nitrogen-enriched DOM resulted in increased yields of the other N-DBPs studied... - User-oriented batch reactor solutions to the homogeneous surface diffusion model for different activated carbon dosagesQiong Zhang
Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI 49931, USA
Water Res 43:1859-66. 2009..The solutions to the HSDM framework are provided as simplified algebraic equations suitable for quick and easy estimations of D(S). The excel spread sheet is provided in the supplemental information and a detailed example is discussed... - Stability of commercial metal oxide nanoparticles in waterYang Zhang
Department of Civil and Environmental Engineering, Arizona State University, Tempe, AZ 85287 5306, USA
Water Res 42:2204-12. 2008..Filtration using a 0.45 microm filter was required to remove more than 90% of the nanoparticle mass... - Toxicity and cellular responses of intestinal cells exposed to titanium dioxideBrian A Koeneman
Cellular and Molecular Biosciences Faculty, School of Life Sciences, Arizona State University, PO Box 874501, Tempe, AZ 85287 4501, USA
Cell Biol Toxicol 26:225-38. 2010..Although TiO(2) does not show cell death, the implication of other, non-lethal, effects could lead to undesired outcomes (i.e., disease, malnutrition, shortened life span, etc.)... - Dissolved organic nitrogen removal during water treatment by aluminum sulfate and cationic polymer coagulationWontae Lee
HDR Engineering, Inc, 3200 East Camelback Road Suite 350, Phoenix, AZ 85018, USA
Water Res 40:3767-74. 2006..Results indicated that the DON added as part of the cationic polymer was almost completely removed at optimum aluminum sulfate and polymer doses... - Comparison of dissolved-organic-carbon residuals from air- and pure-oxygen-activated-sludge sequencing-batch reactorsMario Esparza-Soto
Centro Interamericano de Recursos del Agua, Universidad Autonoma del Estado de Mexico, Toluca
Water Environ Res 78:321-9. 2006..Analysis of a database from side-by-side O2- and air-AS pilot tests from literature supported these observations... - Transformation of molecular weight distributions of dissolved organic carbon and UV-absorbing compounds at full-scale wastewater-treatment plantsMario Esparza-Soto
Centro Interamericano de Recursos del Agua at Universidad Autónoma del Estado de México, Toluca
Water Environ Res 78:253-62. 2006..The removal of DOC by air- and O2-AS bacteria followed trends predicted by a macromolecule degradation model. Trickling-filter effluent DOC exhibited a skewed distribution toward the high MWF (50% DOC, > 3 KDa)... - Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matterWen Chen
PBS4J INC. 7310 N. 16th St. Ste 310, Phoenix, AZ 85020, USA
Environ Sci Technol 37:5701-10. 2003..Aromatic carbon and the presence of specific aromatic compounds (as indicated by solid-state 13C NMR and FTIR data) resulted in EEMs that aided in differentiating wastewater effluent DOM from drinking water DOM... - Factors affecting formation of haloacetonitriles, haloketones, chloropicrin and cyanogen halides during chloraminationXin Yang
Department of Civil Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Water Res 41:1193-200. 2007..Chloropicrin concentrations were always low (around detection limits) under all conditions. Increasing the concentrations of bromide ions enhanced the formation of bromine-substituted DBPs... - Dissolved organic nitrogen as a precursor for chloroform, dichloroacetonitrile, N-nitrosodimethylamine, and trichloronitromethaneWontae Lee
HDR Engineering, Inc, 3200 East Camelback Road, Suite 350, Phoenix, Arizona 85018, USA
Environ Sci Technol 41:5485-90. 2007..e., increasing nitrogen content of DOM). NDMA formation also increased as the amino sugar to aromatic ratio of DOM increased. The results support the hypothesis that DON promotes the formation of N-DBPs... - Correlations between organic matter properties and DBP formation during chloraminationXin Yang
Department of Civil Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Water Res 42:2329-39. 2008..A modified model is proposed to simplify the reactions involving chloramination of OM fractions. FTIR spectra of OM before and after chloramination partially confirmed that ketone groups were reactive with monochloramine...