Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Sci Total Environ. 2017 Dec 31;607-608:103-108. doi: 10.1016/j.scitotenv.2017.06.259. Epub 2017 Jul 5.
Concentrations and vertical distributions of organophosphate esters (OPEs) were investigated in the sediment cores collected from the Laizhou Bay, Bohai Sea of China. The total concentrations of OPEs in the sediment core (CA) collected near the Yellow River Estuary were in the range of 11.8-102ng/g, while the total concentrations in the sediment core (CB) near a mariculture area were 6.65-41.5ng/g. Significantly high concentrations of OPEs were found in the sediments near the Yellow River Estuary than those in the mariculture area. Vertical distributions in the sediment cores demonstrated a recent increase of OPE emissions, especially for tri-n-butyl phosphate (TnBP), tris (2-chloroethyl) phosphate (TCEP), and tris (2-chloroisopropyl) phosphate (TCPP). Generally, TCEP and TCPP were the dominant congeners in the sediment cores, while the profiles of TnBP were increase in the surface 0-20cm layers of the CA core. OPEs in the CA core may be remarkably influenced by the discharge of Yellow River, whereas OPEs in the CB core may originate from the transport through seawater. The remarkable increase of OPE flame retardants in the surface sediments raises the concern about their emissions and risks to the environment and indicates the need for further monitoring.
在中国渤海莱州湾的沉积物岩芯中研究了有机磷酸酯 (OPEs) 的浓度和垂直分布。在黄河口附近采集的沉积物岩芯 (CA) 中，OPEs 的总浓度范围为 11.8-102ng/g，而在水产养殖区附近采集的沉积物岩芯 (CB) 中，OPEs 的总浓度为 6.65-41.5ng/g。在黄河口附近的沉积物中发现了浓度明显较高的 OPEs，而在水产养殖区的沉积物中则较低。沉积物岩芯的垂直分布表明 OPEs 的排放最近有所增加，尤其是三丁基磷酸酯 (TnBP)、三(2-氯乙基)磷酸酯 (TCEP) 和三(2-氯异丙基)磷酸酯 (TCPP)。一般来说，TCEP 和 TCPP 是沉积物岩芯中的主要同系物，而 TnBP 的分布则在 CA 岩芯的表层 0-20cm 层中增加。CA 岩芯中的 OPEs 可能受到黄河排放的显著影响，而 CB 岩芯中的 OPEs 可能源自海水的传输。表面沉积物中 OPE 阻燃剂的显著增加引起了人们对其排放及其对环境的风险的关注，表明需要进一步监测。
