Tags

Type your tag names separated by a space and hit enter

Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag.
Environ Sci Technol. 2011 Aug 01; 45(15):6600-7.ES

Abstract

We compared silver (Ag) bioavailability and toxicity to a freshwater gastropod after exposure to ionic silver (Ag(+)) and to Ag nanoparticles (Ag NPs) capped with citrate or with humic acid. Silver form, exposure route, and capping agent influence Ag bioaccumulation dynamics in Lymnaea stagnalis. Snails efficiently accumulated Ag from all forms after either aqueous or dietary exposure. For both exposure routes, uptake rates were faster for Ag(+) than for Ag NPs. Snails efficiently assimilated Ag from Ag NPs mixed with diatoms (assimilation efficiency (AE) ranged from 49 to 58%) and from diatoms pre-exposed to Ag(+) (AE of 73%). In the diet, Ag NPs damaged digestion. Snails ate less and inefficiently processed the ingested food, which adversely impacted their growth. Loss rates of Ag were faster after waterborne exposure to Ag NPs than after exposure to dissolved Ag(+). Once Ag was taken up from diet, whether from Ag(+) or Ag NPs, Ag was lost extremely slowly. Large Ag body concentrations are thus expected in L. stagnalis after dietborne exposures, especially to citrate-capped Ag NPs. Ingestion of Ag associated with particulate materials appears as the most important vector of uptake. Nanosilver exposure from food might trigger important environmental risks.

Authors+Show Affiliations

US Geological Survey, Menlo Park, California 94025, United States. mcroteau@usgs.govNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

21667957

Citation

Croteau, Marie-Noële, et al. "Silver Bioaccumulation Dynamics in a Freshwater Invertebrate After Aqueous and Dietary Exposures to Nanosized and Ionic Ag." Environmental Science & Technology, vol. 45, no. 15, 2011, pp. 6600-7.
Croteau MN, Misra SK, Luoma SN, et al. Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag. Environ Sci Technol. 2011;45(15):6600-7.
Croteau, M. N., Misra, S. K., Luoma, S. N., & Valsami-Jones, E. (2011). Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag. Environmental Science & Technology, 45(15), 6600-7. https://doi.org/10.1021/es200880c
Croteau MN, et al. Silver Bioaccumulation Dynamics in a Freshwater Invertebrate After Aqueous and Dietary Exposures to Nanosized and Ionic Ag. Environ Sci Technol. 2011 Aug 1;45(15):6600-7. PubMed PMID: 21667957.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag. AU - Croteau,Marie-Noële, AU - Misra,Superb K, AU - Luoma,Samuel N, AU - Valsami-Jones,Eugenia, Y1 - 2011/07/06/ PY - 2011/6/15/entrez PY - 2011/6/15/pubmed PY - 2011/12/13/medline SP - 6600 EP - 7 JF - Environmental science & technology JO - Environ Sci Technol VL - 45 IS - 15 N2 - We compared silver (Ag) bioavailability and toxicity to a freshwater gastropod after exposure to ionic silver (Ag(+)) and to Ag nanoparticles (Ag NPs) capped with citrate or with humic acid. Silver form, exposure route, and capping agent influence Ag bioaccumulation dynamics in Lymnaea stagnalis. Snails efficiently accumulated Ag from all forms after either aqueous or dietary exposure. For both exposure routes, uptake rates were faster for Ag(+) than for Ag NPs. Snails efficiently assimilated Ag from Ag NPs mixed with diatoms (assimilation efficiency (AE) ranged from 49 to 58%) and from diatoms pre-exposed to Ag(+) (AE of 73%). In the diet, Ag NPs damaged digestion. Snails ate less and inefficiently processed the ingested food, which adversely impacted their growth. Loss rates of Ag were faster after waterborne exposure to Ag NPs than after exposure to dissolved Ag(+). Once Ag was taken up from diet, whether from Ag(+) or Ag NPs, Ag was lost extremely slowly. Large Ag body concentrations are thus expected in L. stagnalis after dietborne exposures, especially to citrate-capped Ag NPs. Ingestion of Ag associated with particulate materials appears as the most important vector of uptake. Nanosilver exposure from food might trigger important environmental risks. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/21667957/Silver_bioaccumulation_dynamics_in_a_freshwater_invertebrate_after_aqueous_and_dietary_exposures_to_nanosized_and_ionic_Ag_ L2 - https://doi.org/10.1021/es200880c DB - PRIME DP - Unbound Medicine ER -