RESUMO
The extent of per- and polyfluoroalkyl substances (PFAS) in groundwater surrounding legacy landfills is currently poorly constrained. Seventeen PFAS were analysed in groundwater surrounding legacy landfills in a major Australian urban re-development precinct. Sampling locations (nâ¯=â¯13) included sites installed directly in waste material and down-gradient from landfills, some of which exhibited evidence of leachate contamination including elevated concentrations of ammonia-N (≤106â¯mg/L), bicarbonate (≤1,740â¯mg/L) and dissolved methane (≤10.4â¯mg/L). Between one and fourteen PFAS were detected at all sites and PFOS, PFHxS, PFOA and PFBS were detected in all samples. The sum of detected PFAS (∑14PFAS) varied from 26â¯ng/L at an ambient background site to 5,200â¯ng/L near a potential industrial point-source. PFHxS had the highest median concentration (34â¯ng/L; range: 2.6-280â¯ng/L) followed by PFOS (26â¯ng/L; range: 1.3-4,800â¯ng/L), PFHxA (19â¯ng/L; range: Assuntos
Monitoramento Ambiental/métodos
, Fluorocarbonos/análise
, Água Subterrânea/química
, Ácidos Sulfônicos/análise
, Instalações de Eliminação de Resíduos
, Poluentes Químicos da Água/análise
, Austrália
, Ácidos Carboxílicos/análise
, Reforma Urbana