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Assessment of Assimilation and Elimination of Silver and TiO2 Nanoparticles in Artemia franciscana in Different Salinities
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Mina Tavana   , Mohammad Reza Kalbassi , Abdolmohammad Abedian Kenari , Seyed Ali Johari |
| , kalbassi_m@modares.ac.ir |
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Abstract: (9010 Views) |
| Artemia is a passive filter-feeder organism that uptakes particles between 1-50 micron without
selection. In this study, potential of Artemia franciscana for nano particles assimilation and release in
different salinities were investigated. Artemia nauplii were exposed to colloidal silver nano particles (32
mg/l) as well as TiO2 nano particles (100 mg/l) for 12 and 48 hours, respectively. Treated Artemia nauplii
were collected and dried and the uptake rate of nanoparticles was measured by atomic absorption analysis.
Also, to examine the elimination rate of adsorbed nano materials in naupliies, treated Artemia were
returned to freshwater and were sampled after 5, 15, 30, 60, and 120 minutes, the release rate of nano
materials was measured and 35, 70, 105 and 140 mg/l salinities was investigated in periods of 2, 6, 24, 48,
72 and 96 hours by spectrophotometer by furnace atomic absorption analysis. The results of silver and
TiO2 nano particles absorption indicated that the uptake of TiO2 (68.16±38.18) has been significantly
higher than metal silver ion (2.13 ±1.79) (P<0.05). In addition, the release rate of silver ion in comparison
with titanium ion in nauplies were returned to freshwater has been higher significantly (P<0.05).
Moreover, the results of 24 h spectrophotometry showed that the silver ion deposition rate was increased
by increasing salinity. Regarding the TiO2 with concentration of 100 mg/l, in the salinity of 70 mg/l,
although, the deposition and aggregation rate in solution phase increased, the deposition rate of particles
reached the maximum rate in 105 and 140 mg/l salinities. Conclusion of this research confirmed that, in
the presence of silver or TiO2 nano particles in natural habitats of artemia or in the culture media with
different salinities, a part of this nano materials deposited in salt waters and the rest would be absorbed by
this organism which could be transmitted to the next consumer of Artemia. |
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| Keywords: Uptake and release, Silver and TiO2 nanoprticles, Artemia franciscana, Salinity |
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Full-Text [PDF 146 kb]
(3154 Downloads)
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Type of Study: Research/ Original/ Regular Article |
Received: 2014/12/28 | Revised: 2015/02/28 | Accepted: 2014/12/28 | ePublished: 2014/12/28
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