Polyfluoroalkyl compounds in landfill leachates.

Environmental pollution (Barking, Essex : 1987) (2010-01-08)
Jan Busch, Lutz Ahrens, Renate Sturm, Ralf Ebinghaus
ABSTRACT

Polyfluoroalkyl compounds (PFCs) are widely used in industry and consumer products. These products could end up finally in landfills where their leachates are a potential source for PFCs into the aqueous environment. In this study, samples of untreated and treated leachate from 22 landfill sites in Germany were analysed for 43 PFCs. SigmaPFC concentrations ranged from 31 to 12,819 ng/L in untreated leachate and 4-8060 ng/L in treated leachate. The dominating compounds in untreated leachate were perfluorobutanoic acid (PFBA) (mean contribution 27%) and perfluorobutane sulfonate (PFBS) (24%). The discharge of PFCs into the aqueous environment depended on the cleaning treatment systems. Membrane treatments (reverse osmosis and nanofiltrations) and activated carbon released lower concentrations of PFCs into the environment than cleaning systems using wet air oxidation or only biological treatment. The mass flows of summation operatorPFCs into the aqueous environment ranged between 0.08 and 956 mg/day.

MATERIALS
Product Number
Brand
Product Description

Supelco
Heptafluorobutyric acid, suitable for ion chromatography, ≥99.5% (GC)
Sigma-Aldrich
Heptafluorobutyric acid, 98%
Sigma-Aldrich
Heptafluorobutyric acid, ≥99.0% (GC)
Supelco
Heptafluorobutyric acid solution, 0.5 M in H2O, LiChropur, suitable for ion pair chromatography
Sigma-Aldrich
Silver heptafluorobutyrate, 97%