In vivo biodegradation of colloidal quantum dots by a freshwater invertebrate, Daphnia magna
- Title
- In vivo biodegradation of colloidal quantum dots by a freshwater invertebrate, Daphnia magna
- Author
- 윤태현
- Keywords
- Daphnia magna; Quantum dot; Biodegradation; Manufactured nanomaterials; Fluorescence spectromicroscopy
- Issue Date
- 2012-04
- Publisher
- ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
- Citation
- AQUATIC TOXICOLOGY, 114, 217-222
- Abstract
- Impacts of planktonic invertebrate, Daphnia magna, on the speciation of colloidal quantum dots (QD) were investigated using fluorescence spectromicroscopic technique. Well-dispersed (GA/TOPO)QD were prepared by forming a supramolecular assembly of hydrophobic (TOPO)QD with biomacromolecules (i.e., Gum Arabic, GA). Biological degradation of this nanomaterial was monitored by fluorescence spectromicroscopic methods. Our study confirmed the major uptake pathway of manufactured nanomaterials and in vivo biodegradation processes in a well-known toxicity test organism, D. magna. In addition, we also found that D. magna can induce significant deterioration of aquatic media by releasing fragments of partially degraded QD colloids. These biological processes may significantly change the predicted toxicities of nanomaterials in aquatic environments. Thus, we propose that the impacts of aquatic living organisms on the environmental fate of manufactured nanomaterials (MNs) should be carefully taken into account when assessing the risk of MNs to the environment and human health. (c) 2012 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0166445X12000914http://hdl.handle.net/20.500.11754/42598
- ISSN
- 0166-445X
- DOI
- 10.1016/j.aquatox.2012.02.033
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML