Title

Behavior Of Engineered Nanoparticles In Landfill Leachate

Abstract

This research sought to understand the behavior of engineered nanoparticles in landfill leachate by examining the interactions between nanoparticles and leachate components. The primary foci of this paper are the effects of ZnO, TiO2, and Ag nanoparticles on biological landfill processes and the form of Zn, Ti, and Ag in leachate following the addition of nanoparticles. Insight into the behavior of nanoparticles in landfill leachate was gained from the observed increase in the aqueous concentrations over background for Zn, Ti, and Ag in some tested leachates attributed to leachate components interacting with the nanoparticle coatings resulting in dispersion, dissolution/ dissociation, and/or agglomeration. Coated nanoparticles did not affect biological processes when added to leachate; five-day biochemical oxygen demand and biochemical methane potential results were not statistically different when exposed to nanoparticles, presumably due to the low concentration of dissolved free ionic forms of the associated metals resulting from the interaction with leachate components. Chemical speciation modeling predicted that dissolved Zn in leachate was primarily associated with dissolved organic matter, Ti with hydroxide, and Ag with hydrogen sulfide and ammonia; less than 1% of dissolved Zn and Ag was in the free ionic form, and free ionic Ti and Ag concentrations were negligible. © 2013 American Chemical Society.

Publication Date

8-6-2013

Publication Title

Environmental Science and Technology

Volume

47

Issue

15

Number of Pages

8114-8122

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/es305175e

Socpus ID

84881467132 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84881467132

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