Abstract

Nanosilver has become one of the most widely used nanomaterials in consumer products because of its antimicrobial properties. Public concern over the potential adverse effects of nanosilver's environmental release has prompted discussion of federal regulation. In this paper, we assess several classes of consumer products for their silver content and potential to release nanosilver into water, air, or soil. Silver was quantified in a shirt, a medical mask and cloth, toothpaste, shampoo, detergent, a towel, a toy teddy bear, and two humidifiers. Silver concentrations ranged from 1.4 to 270,000 μg Ag g product-1. Products were washed in 500 mL of tap water to assess the potential release of silver into aqueous environmental matrices (wastewater, surface water, saliva, etc.). Silver was released in quantities up to 45 μg Ag g product-1, and size fractions were both larger and smaller than 100 nm. Scanning electron microscopy confirmed the presence of nanoparticle silver in most products as well as in the wash water samples. Four products were subjected to a toxicity characterization leaching procedure to assess the release of silver in a landfill. The medical cloth released an amount of silver comparable to the toxicity characterization limit. This paper presents methodologies that can be used to quantify and characterize silver and other nanomaterials in consumer products. The quantities of silver in consumer products can in turn be used to estimate real-world human and environmental exposure levels.

Original languageEnglish (US)
Pages (from-to)1875-1882
Number of pages8
JournalJournal of Environmental Quality
Volume39
Issue number6
DOIs
StatePublished - Nov 2010

Fingerprint

Consumer products
silver
Silver
Nanostructured materials
Toxicity
consumer product
toxicity
Water
saliva
Detergents
detergent
Land fill
Surface waters
water
Leaching
Masks
landfill
Wastewater
scanning electron microscopy
leaching

ASJC Scopus subject areas

  • Environmental Engineering
  • Pollution
  • Management, Monitoring, Policy and Law
  • Waste Management and Disposal
  • Water Science and Technology

Cite this

The release of nanosilver from consumer products used in the home. / Benn, Troy; Cavanagh, Bridget; Hristovski, Kiril; Posner, Jonathan D.; Westerhoff, Paul.

In: Journal of Environmental Quality, Vol. 39, No. 6, 11.2010, p. 1875-1882.

Research output: Contribution to journalArticle

Benn, Troy ; Cavanagh, Bridget ; Hristovski, Kiril ; Posner, Jonathan D. ; Westerhoff, Paul. / The release of nanosilver from consumer products used in the home. In: Journal of Environmental Quality. 2010 ; Vol. 39, No. 6. pp. 1875-1882.
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