Migration of polybrominated diphenyl ethers in biosolids-amended soil

作者：Gorgy Tamer; Li Loretta Y^*; Grace John R; Ikonomou Michael G

来源：Environmental Pollution, 2013, 172: 124-130.

DOI：10.1016/j.envpol.2012.07.047

• Polybrominated diphenyl ethers
• Biosolids
• Mobility
• Soils

A field investigation was carried out to determine PBDE concentrations over a one-year period in agricultural soils onto which 80 tonnes biosolids/hectare had been applied. The PBDE concentrations increased from 80 to 300 pg/g dry weight basis to 300 x 10(3)-600 x 10(3) pg/g dw due to biosolids application, and PBDEs migrated downwards to depths of at least 0.85 m. Concentrations decreased non-uniformly with depth. PBDE levels decreased exponentially in the topmost biosolids-amended soils layer, while increasing in the next underlying soil layer over the one-year period. The rate of decrease of total PBDE mass in the top 0.00-0.05 m layer was almost two orders of magnitude greater than the rates of increase in total PBDE mass in the lower layers, indicating that effects such as photodegradation and/or volatilization likely were to have been significant in the surface layer.

• 出版日期2013-1