Grantee Research Project Results
2010 Progress Report: Interactions of Natural Organic Matter with C60 Fullerene and their Impact on C60 Transport, Bioavailability and Toxicity
EPA Grant Number: R834093Title: Interactions of Natural Organic Matter with C60 Fullerene and their Impact on C60 Transport, Bioavailability and Toxicity
Investigators: Li, Qilin , Alvarez, Pedro J.
Institution: Rice University
EPA Project Officer: Hahn, Intaek
Project Period: January 1, 2009 through December 31, 2011
Project Period Covered by this Report: July 1, 2008 through June 3,2011
Project Amount: $399,995
RFA: Exploratory Research: Nanotechnology Research Grants Investigating Fate, Transport, Transformation, and Exposure of Engineered Nanomaterials: A Joint Research Solicitation - EPA, NSF, & DOE (2007) RFA Text | Recipients Lists
Research Category: Nanotechnology , Safer Chemicals
Objective:
The objectives of this research are to 1) understand the chemical nature of NOM C60 interactions and their impact on “solubility” and physicochemical properties of nC60 in realistic aqueous environments; 2) determine the effect of NOM on nC60 adsorption/deposition and transport in surface water and groundwater systems; 3) investigate the effect of NOM-C60 interactions on nC60 toxicity mechanisms. During our investigation, solar irradiation was found to greatly alter the physicochemical properties of nC60, and consequently influence its fate, transport and toxicity. Another type of carbon-based nanomaterials, carbon nanotubes, also were found to undergo photochemical transformation under sunlight. As a result, we adjusted our focus to include the investigation on the role of sunlight and expanded our scope of research to include carbon nanotubes.
Progress Summary:
Figure 1. Impact of solar irradiation and humic acid on the deposition of
nC60 nanoparticles.
Figure 2. Attachment efficiencies of pristine, 20-hour UVA-irradiated (20hUV) adn 7-day UVA-irradiated (7DUV) nC60 as a function of NaCl concentration. | Figure 3. Attachment efficiencies of pristine nC60 onto silica surfacea as a function of NaCl concentratin in the presence of dissolve Suwanee River humic acid or Elliott Soil humic acid. |
Figure 4. Attachment efficiencies of (a) pristine, (b) 7-day UVA-irradiated nC60 onto bare and humic
coated silica surface as a function of NaCl concentration.
Figure 5. Deposition of the pristine MWNT-COOH and
7-days UVA-irradiated MWNT- COOH in NaCl Solutions
Figure 6. Loss of E. coli viability in the presence of 50 mg/L
carbon nanotubes after 3 h exposure
Future Activities:
Journal Articles on this Report : 2 Displayed | Download in RIS Format
Other project views: | All 13 publications | 5 publications in selected types | All 5 journal articles |
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Type | Citation | ||
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Hwang YS, Qu X, Li Q. The role of photochemical transformations in the aggregation and deposition of carboxylated multiwall carbon nanotubes suspended in water. Carbon 2013;55:81-89. |
R834093 (2009) R834093 (2010) R834093 (Final) |
Exit |
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Qu X, Alvarez PJJ, Li Q. Impact of sunlight and humic acid on the deposition kinetics of aqueous fullerene nanoparticles (nC60). Environmental Science & Technology 2012;46(24):13455-13462. |
R834093 (2009) R834093 (2010) R834093 (Final) |
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Supplemental Keywords:
fullerene nanoparticles, carbon nanotubes, nanomaterials, natural organic matter, NOM, UV, irradiation, sunlight, transport, fate, bioavailability, toxicity, photochemical transformation, aggregation, deposition, sorption, stability, MWCNTs, CNTs, Health, Scientific Discipline, Water, Environmental Chemistry, Health Risk Assessment, Risk Assessments, Biochemistry, Drinking Water, Engineering, Chemistry, & Physics, fate and transport, human health effects, carbon fullerene, epidemelogy, nanotechnology, other - risk assessment, particle exposure, community water system, ambient particle health effects, human exposure, engineered nanomaterials, toxicity, nanomaterials, water quality, cellular responses, drinking water contaminants, biochemical research, human health risk, drinking water systemProgress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.