Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, 400085, India.
Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400094, India.
Environ Geochem Health. 2018 Dec;40(6):2587-2601. doi: 10.1007/s10653-018-0125-9. Epub 2018 May 22.
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 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 Pb dating technique. Average percentage contribution of commercial penta-BDE (f), octa-BDE (f), and deca-BDE (f) to the profile found in sediments collected across Thane creek were 24 ± 5, 5 ± 1 and 69 ± 7% (p < 0.001) respectively. Levels of all measured PBDEs in sediment met with guideline values except for the penta-BDE (total, BDE-99 and BDE-100) at few locations.
对来自塔纳河的表层沉积物和柱状沉积物中的 15 种多溴二苯醚（PBDE）同系物水平进行了监测，以了解其时空分布情况。表层沉积物中的总 PBDE（ΣPBDE）浓度范围为 15.98 至 132.72ng/g 干重。BDE-209 是最丰富的同系物，其对总 PBDE 的百分比贡献在 19%至 35%之间。总 PBDE 在沉积物中随深度呈多模态分布，其中 10cm 深度处的模式占主导地位。沉积物芯的结果也表明，在过去的二十年中，周边地区大量使用了 PBDE。还使用 Pb 年代测定技术评估了该溪的沉积速率。在整个塔纳河采集的沉积物中，商用五溴二苯醚（f）、八溴二苯醚（f）和十溴二苯醚（f）对剖面的平均百分比贡献分别为 24±5%、5±1%和 69±7%（p<0.001）。除了少数几个地点的五溴二苯醚（总、BDE-99 和 BDE-100）外，所有测量的 PBDE 水平均符合指导值。
