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Interaction of functionalized fullerenes and metal accumulation in Daphnia magna
Author(s) -
Yu ZhiGuo,
Wang WenXiong
Publication year - 2014
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.2520
Subject(s) - daphnia magna , fullerene , daphnia , metal , environmental chemistry , chemistry , branchiopoda , cladocera , zoology , biology , toxicity , organic chemistry , crustacean
In aquatic environments, transformation of pollutants by association with functionalized carbon‐based nanoparticles can dramatically change their cycling pathways. The present study quantified the uptake and depuration behavior of cadmium and zinc bound with functionalized fullerene nanoparticles ( f ‐nC 60 ) in a freshwater cladoceran, Daphnia magna , in a well‐dispersed medium. Metal uptake proceeded with a linear pattern during the 8‐h exposure period, and the uptake rate constants ( k u ) were 1.3‐fold to 1.4‐fold higher for Cd or comparable for Zn bound with f ‐nC 60 than those of the free ones. The assimilation efficiencies of Cd and Zn bound with f ‐nC 60 were significantly enhanced when compared with those metals bound with algal food. Furthermore, the depuration of metals bound with f ‐nC 60 was relatively slower compared to the depuration of metals bound with carbon nanotubes. A longer exposure to f ‐nC 60 resulted in an even slower depuration of metals. The authors conclude that metal binding with f ‐nC 60 as modified nanoparticles could serve as a new pathway for the elevated metal accumulation in Daphnia . Environ Toxicol Chem 2014;33:1122–1128 . © 2014 SETAC