Polybrominated diphenyl ethers (PBDEs) in core sediments from creek ecosystem: occurrence, geochronology, and source contribution

Autor: M. Tiwari, Sanjay Kumar Sahu, P.Y. Ajmal, R.C. Bhangare, Gauri Girish Pandit
Rok vydání: 2018
Předmět:
Zdroj: Environmental Geochemistry and Health. 40:2587-2601
ISSN: 1573-2983
0269-4042
Popis: The levels of 15 polybrominated diphenyl ether (PBDE) congeners in grab sediment and sediment cores from the Thane creek were monitored for their spatial and temporal distribution. Total PBDE (ΣPBDE) concentrations in grab sediments were ranging from 15.98 to 132.72 ng g-1 dry weight. BDE-209 was the most abundant congener with percentage contribution in the range of 19-35% to total PBDEs. Total PBDE show multimode concentration with depth in sediment, among which mode at a depth of 10 cm is predominant. Results of sediment core also indicates PBDEs were enormously used in last two decades in surrounding area. Sedimentation rate at the creek was also evaluated using Pb210 dating technique. Average percentage contribution of commercial penta-BDE (fP), octa-BDE (fO), and deca-BDE (fD) to the profile found in sediments collected across Thane creek were 24 ± 5, 5 ± 1 and 69 ± 7% (p
Databáze: OpenAIRE