Partitioning of silver and chemical speciation of free Ag in soils amended with nanoparticles.

ABSTRACT:

Background

Knowledge about silver nanoparticles in soils is limited even if soils are a critical pathway for their environmental fate. In this paper, speciation results have been acquired using a silver ion selective electrode in three different soils.

Results

Soil organic matter and pH were the most important soil properties controlling the occurrence of silver ions in soils. In acidic soils, more free silver ions are available while in the presence of organic matter, ions were tightly bound in complexes. The evolution of the chemical speciation of the silver nanoparticles in soils was followed over six months.

Conclusion

During the first few hours, there appeared to be a strong sorption of the silver with soil ligands, whereas over time, silver ions were released, t

SUBMITTER: Benoit R 

PROVIDER: S-EPMC3648414 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature