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Chloride in water affects silver nanoparticle toxicity

Scientists from Stanford University, US, have added to the understanding of how silver nanoparticles (AgNPs) oxidise and react with ubiquitous chloride ions in the environment to alter toxicity.

“Though chloride can strongly affect toxicity results for AgNPs, their interaction is rarely considered,” write the researchers in a paper to be published in Environmental Science and Technology.

The interaction is challenging to study because of the number of soluble and solid silver chloride substances that can form. The team’s results suggest that the rate at which silver nanoparticles dissolve in water systems containing chloride ions is strongly dependent on the ratio of chloride to silver.

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