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Surface charge-dependent toxicity of silver nanoparticles.
Environ Sci Technol. 2011 Jan 01; 45(1):283-7.ES

Abstract

As a result of the extensive number of applications of silver nanoparticles (AgNPs), their potential impacts, once released into the environment, are of concern. The toxicity of AgNPs was reported to be dependent on various factors such as particle size, shape and capping agent. Although these factors may play a role in AgNPs toxicity, the results presented herein suggest that surface charge is one of the most important factors that govern the toxicity of AgNPs. In the current study, the toxicity of four AgNPs representing various surface charging scenarios ranging from highly negative to highly positive was investigated. These AgNPs were (1) uncoated H(2)-AgNPs, (2) citrate coated AgNPs (Citrate-AgNPs), (3) polyvinylpyrrolidone coated AgNPs (PVP-AgNPs), and (4) branched polyethyleneimine coated AgNPs (BPEI-AgNPs). Our results clearly demonstrate that the AgNPs exhibited surface charge-dependent toxicity on the bacillus species investigated. Furthermore, ultrafiltration membranes were utilized to purify the AgNPs suspensions from residual impurities prior to the introduction to the microbes. This step was crucial in determining the true AgNPs toxicity and is either missing or not explicitly mentioned in most of the reported toxicity studies.

Authors+Show Affiliations

Department of Civil & Environmental Engineering, University of Cincinnati, Cincinnati, Ohio, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

21133412

Citation

El Badawy, Amro M., et al. "Surface Charge-dependent Toxicity of Silver Nanoparticles." Environmental Science & Technology, vol. 45, no. 1, 2011, pp. 283-7.
El Badawy AM, Silva RG, Morris B, et al. Surface charge-dependent toxicity of silver nanoparticles. Environ Sci Technol. 2011;45(1):283-7.
El Badawy, A. M., Silva, R. G., Morris, B., Scheckel, K. G., Suidan, M. T., & Tolaymat, T. M. (2011). Surface charge-dependent toxicity of silver nanoparticles. Environmental Science & Technology, 45(1), 283-7. https://doi.org/10.1021/es1034188
El Badawy AM, et al. Surface Charge-dependent Toxicity of Silver Nanoparticles. Environ Sci Technol. 2011 Jan 1;45(1):283-7. PubMed PMID: 21133412.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Surface charge-dependent toxicity of silver nanoparticles. AU - El Badawy,Amro M, AU - Silva,Rendahandi G, AU - Morris,Brian, AU - Scheckel,Kirk G, AU - Suidan,Makram T, AU - Tolaymat,Thabet M, Y1 - 2010/12/06/ PY - 2010/12/8/entrez PY - 2010/12/8/pubmed PY - 2011/2/26/medline SP - 283 EP - 7 JF - Environmental science & technology JO - Environ Sci Technol VL - 45 IS - 1 N2 - As a result of the extensive number of applications of silver nanoparticles (AgNPs), their potential impacts, once released into the environment, are of concern. The toxicity of AgNPs was reported to be dependent on various factors such as particle size, shape and capping agent. Although these factors may play a role in AgNPs toxicity, the results presented herein suggest that surface charge is one of the most important factors that govern the toxicity of AgNPs. In the current study, the toxicity of four AgNPs representing various surface charging scenarios ranging from highly negative to highly positive was investigated. These AgNPs were (1) uncoated H(2)-AgNPs, (2) citrate coated AgNPs (Citrate-AgNPs), (3) polyvinylpyrrolidone coated AgNPs (PVP-AgNPs), and (4) branched polyethyleneimine coated AgNPs (BPEI-AgNPs). Our results clearly demonstrate that the AgNPs exhibited surface charge-dependent toxicity on the bacillus species investigated. Furthermore, ultrafiltration membranes were utilized to purify the AgNPs suspensions from residual impurities prior to the introduction to the microbes. This step was crucial in determining the true AgNPs toxicity and is either missing or not explicitly mentioned in most of the reported toxicity studies. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/21133412/Surface_charge_dependent_toxicity_of_silver_nanoparticles_ L2 - https://doi.org/10.1021/es1034188 DB - PRIME DP - Unbound Medicine ER -