Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education; College of Environment, HoHai University, Nanjing, Jiangsu Province, 210098, China.
Environ Monit Assess. 2018 Mar 15;190(4):222. doi: 10.1007/s10661-018-6587-5.
Organophosphate flame retardants (OPFRs) have been detected in the surface water, suspended sediments, and river sediments from the Yangtze River in China. A modified polar organic chemical integrative sampler (m-POCIS) was successfully used to quantify the OPFR concentrations in surface water. The OPFR concentrations estimated by the field m-POCIS at six sampling locations ranged from 8.99 to 112.45 ng/L with an average concentration of 47.04 ng/L. The OPFR concentrations in suspended sediments were related to the sediment particle size distribution. Chlorinated and alkyl OPFRs were the principle compounds in sediments, especially tris(2-chloroisopropyl) phosphate (TCPP) with concentrations of 3.37-29.65 ng/g. The relationship between the OPFR concentrations and total organic carbon (TOC) contents in sediments was examined. The results suggested that the OPFR concentrations were significantly correlated with the TOC contents. The primary OPFR transport mechanism in a freshwater environment occurs in surface water rather than sediment. This was evaluated by the logK and field sediment-water partition coefficient (logK) values between the sediment and water. Finally, the various distributions and transport of OPFRs at the sampling sites indicated that human activities, agricultural production, and wastewater effluents from sewage plants have an important effect on the OPFR levels in a freshwater environment.
在中国长江的地表水、悬浮沉积物和河底沉积物中都检测到了有机磷阻燃剂 (OPFRs)。改良型极性有机化学整合采样器 (m-POCIS) 已成功用于量化地表水的 OPFR 浓度。在六个采样点用现场 m-POCIS 估计的 OPFR 浓度范围为 8.99 至 112.45ng/L，平均浓度为 47.04ng/L。悬浮沉积物中的 OPFR 浓度与沉积物颗粒大小分布有关。氯化和烷基 OPFRs 是沉积物中的主要化合物，特别是三（2-氯异丙基）磷酸酯 (TCPP)，浓度为 3.37-29.65ng/g。还检查了沉积物中 OPFR 浓度与总有机碳 (TOC) 含量之间的关系。结果表明，OPFR 浓度与 TOC 含量显著相关。在淡水环境中，OPFR 的主要迁移机制发生在地表水而不是沉积物中。这可以通过沉积物与水之间的 logK 和现场沉积物-水分配系数 (logK) 值来评估。最后，采样点的各种 OPFR 分布和迁移表明，人类活动、农业生产和污水处理厂的废水对淡水环境中的 OPFR 水平有重要影响。
