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| Type |
Poster Presentation |
| Area |
환경에너지 |
| Room No. |
포스터발표장 |
| Time |
4월 20일 (목요일) 11:00~12:30 |
| Code |
ENVR.P-496 |
| Subject |
Comparative toxicity of surface-modified zerovalent iron nanoparticles on aquatic and terrestrial organisms |
| Authors |
강유경, 장윤석*
POSTECH 환경공학부, Korea
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| Abstract |
Nanoscale zerovalent iron (nZVI)-based materials are increasingly being applied in environmental remediation, therby lead to their exposure to aquatic and terrestrial biota. However, little is known regarding the fate and ecological effects of nZVI, particularly of surface-modified nZVI. In this study, we compared the toxicities of different forms of nZVIs, such as bare nZVI, carboxymethyl cellulose (CMC)-stabilized nZVI, tetrapolyphosphate (TPP)-coated nZVI, and bismuth (Bi)-doped nZVI, on a range of aquatic and terrestrial organisms, including bacteria (Escherichia coli and Bacillus subtilis), plant (Arabidopsis thaliana), water flea (Daphnia magna), and earthworm (Eisenia fetida). Bi- and CMC-nZVI induced adverse biological responses across all test systems, except E. fetida, that varied from cell death in E. coli, B. subtilis, to inhibition of the physiological state in D. magna and A. thaliana. The particle characterization under exposure conditions indicated that surface modification of nZVI played a significant role by changing their physicochemical properties and therefore, their toxicity. The underlying mechanism by which nZVI induces toxicity may be a combination of oxidative stress and cell membrane destabilization and/or the toxic effect of bismuth itself. Overall, our findings provide important implications in the development of environment-friendly nZVI materials and direct further research regarding interspecies exploration |
| E-mail |
ygkang74@postech.ac.kr |
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119th General Meeting of the KCS