# Decabromodifenyl Ether (BDE-209) in Surface Soils from Warsaw and Surrounding Areas: Characterization of Non-Carcinogenic Risk Associated with Oral and Dermal Exposure

## TL;DR

This study measured BDE-209 levels in Warsaw soils and found no significant health risk to young children from oral or dermal exposure.

## Contribution

The study provides new data on BDE-209 soil concentrations and evaluates non-carcinogenic health risks in a specific urban area.

## Key findings

- BDE-209 concentrations in Warsaw soils ranged from 0.4 to 158 ng g−1 d.w.
- High BDE-209 levels were found near heavy traffic and a CHP plant.
- No significant health risk was identified for young children via oral or dermal exposure.

## Abstract

Polybrominated diphenyl ethers (PBDEs) have been used for many years as flame retardants. Due to their physicochemical and toxicological properties, they are considered to be persistent organic pollutants (POPs). BDE-209 is the main component of deca-BDE, the one PBDE commercial mixture currently approved for use in the European Union. The aim of this study was to analyse BDE-209 in surface soil samples from Warsaw and surrounding areas (Poland) as an indicator of environmental pollution with PBDEs, and to characterise the associated health risk. A total of 40 samples were analysed using gas chromatography with electron capture detection (GC-µECD). Concentrations of BDE-209 in soil ranged from 0.4 ng g−1 d.w. (limit of quantification) to 158 ng g−1 d.w. Overall, 52.5% of results were above the method’s limit of quantification. The highest levels were found at several locations with heavy traffic and in the vicinity of a CHP plant in the city. The lowest concentrations were observed in most of the samples collected from low industrialized or green areas (<0.4 to 1.68 ng g−1 d.w.). Exposure to BDE-209 was estimated for one of the most sensitive populations, i.e., young children. The following exposure routes were selected: oral and dermal. No risk was found to young children’s health.