Effects of humic acid and electrolytes on photocatalytic reactivity and transport of carbon nanoparticle aggregates in water.
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.
School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia. soryong.chae@sydney.edu.au
So-Ryong
SR
Chae
Yao
Y
Xiao
Shihong
S
Lin
Tahereh
T
Noeiaghaei
Jong-Oh
JO
Kim
Mark R
MR
Wiesner
D000465:Algorithms; D002384:Catalysis / Q000187:drug effects; D004058:Diffusion / Q000187:drug effects; D004573:Electrolytes / Q000737:chemistry* / Q000494:pharmacology; D006812:Humic Substances; D057927:Hydrophobic and Hydrophilic Interactions; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D055668:Photochemical Processes / Q000187:drug effects; D017382:Reactive Oxygen Species / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D014867:Water / Q000737:chemistry*
D004573:Electrolytes; D006812:Humic Substances; D037742:Nanotubes, Carbon; D017382:Reactive Oxygen Species; D014867:Water; D012822:Silicon Dioxide