Distribution and bioavailability of ceria nanoparticles in an aquatic ecosystem model.
Along with the increasing utilization of engineered nanoparticles, there is a growing concern for the potential environmental and health effects of exposure to these newly designed materials. Understanding the behavior of nanoparticles in the environment is a basic need. The present study aims to investigate the distribution and fate of ceria nanoparticles in an aquatic system model which consists of sediments, water, hornworts, fish and snails, using a radiotracer technique. Concentrations of ceria in the samples at regular time intervals were measured. Ceria nanoparticles were readily removed from the water column and partitioned between different organisms. Both snail and fish have fast absorption and clearance abilities. Hornwort has the highest bioaccumulation factors. At the end of the experiment, sediments accumulated most of the nanoparticles with a recovery of 75.7 ± 27.3% of total ceria nanoparticles, suggesting that sediments are major sinks of ceria nanoparticles.
Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100049, China.
Peng
P
Zhang
Xiao
X
He
Yuhui
Y
Ma
Kai
K
Lu
Yuliang
Y
Zhao
Zhiyong
Z
Zhang
D000818:Animals; D059001:Aquatic Organisms / Q000187:drug effects / Q000378:metabolism*; D001682:Biological Availability; D002563:Cerium / Q000737:chemistry* / Q000493:pharmacokinetics* / Q000633:toxicity; D002565:Cerium Radioisotopes / Q000737:chemistry / Q000493:pharmacokinetics; D017753:Ecosystem; D053768:Metal Nanoparticles / Q000737:chemistry / Q000633:toxicity; D036103:Nanotechnology; D010087:Oxides / Q000737:chemistry; D011849:Radioactive Tracers; D012449:Safety; D014018:Tissue Distribution
D002565:Cerium Radioisotopes; D010087:Oxides; D011849:Radioactive Tracers; D002563:Cerium