Journal
WATER RESEARCH
Volume 46, Issue 13, Pages 4053-4062Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2012.05.018
Keywords
Fullerene nanoparticle; Carbon nanotubes; Humic acid; Electrolytes; Reactive oxygen species; Transport through silica beads
Funding
- Korea Ministry of Environment [GT-SWS-11-01-002-0]
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2011-0013792]
- National Science Foundation (NSF)
- Environmental Protection Agency (EPA) under NSF, Center for the Environmental Implications of Nano Technology (CEINT) [EF-0830093]
- National Research Foundation of Korea [2011-0013792] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The effects of naturally occurring macromolecules such as humic acid (HA) and electrolytes on four fullerene nanoparticle suspensions (i.e., C-60, C-60(OH)(24), single- and multiwall carbon nanotubes) were explored with respect to: (1) characteristics of nanoparticle aggregates, (2) transport of the aggregates through a silica porous media, and (3) production of reactive oxygen species (ROS) from the photosensitized fullerene aggregates. The presence of HA and salts increased the size of aggregates and relative hydrophobicity associated with transport through silica beads, while decreasing ROS production. These data illustrate the importance that transformation of engineered nanomaterials (ENMs) through interactions with aquatic solutes may have in altering the environmental behavior of nanomaterials. (C) 2012 Elsevier Ltd. All rights reserved.
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