卤系阻燃剂在东江工业水体中的质量浓度及其分配特征

本研究分析了东江工业水体中卤系阻燃剂的浓度,组成分布以及分配特征.结果表明多溴联苯醚(PBDEs)是水体中的主要的卤系阻燃剂,占总卤系阻燃剂的41.0%,其质量浓度范围为1 102.3~3 666.9 pg·L~(-1),其中BDE209是颗粒相的主要成分.四溴双酚A(TBBPA)占总卤系阻燃剂的32.4%,其质量浓度范围为1 120.9~2 856.5 pg·L~(-1),其他卤系阻燃剂如十溴二苯乙烷(DBDPE)、德克隆(DP)和六溴环十二烷(HBCDs)分别占总卤系阻燃剂的16.3%、7.3%和3.0%,其质量浓度范围分别为397.7~1 736.8、235.7~778.1和9.5~266.8 pg·L~(-1).在对水体溶解相和颗粒相分配的研究中发现,PBDEs、DBDPE、DP和HBCDs主要存在于水体颗粒相中,而TBBPA由于其较大的水溶性,主要存在于溶解相中;卤系阻燃剂的lgK_(oc)与lgK_(ow)之间存在显著的相关性,但是lgK_(oc)实测值与其理论预测值有一定差异,这可能是受控于悬浮颗粒(SPM)含量和溶解有机碳(DOC)含量这两个因素,此外,颗粒相和溶解相之间分配是否达到平衡也是影响测量lg Koc值的因素.

Concentrations and Partitioning of Halogenated Flame Retardants in Industrial Water of Dongjiang River

The concentrations and partitioning of Halogented Flame Retardants (HFRs) were measured in industrial water of Dongjiang River. Polybrominated biphenyl ether (PBDEs) was the predominant pollutant accounting for 41.0% of the HFRs, dominated by BDE209 in the particulate phase, with the concentration ranging from 1102.3-3666.9 pg·L^-1. The concentrations of Tetrabromobisphenol A (TBBPA) ranged from 1120.9-2856.5 pg·L^-1, accounting for 32.4% of total halogenated flame retardants. The concentrations of other flame retardants, such as Decabromodiphenyl ethane(DBDPE), dechlorane plus (DP) and Hexabromocyclododecanes (HBCDs), accounting for 16.3%, 7.3% and 3.0%, were in the ranges of 397.7-1736.8, 235.7-778.1 and 9.5-266.8 pg·L^-1, respectively. PBDEs, DBDPE, DP and HBCDs mainly existed in the particle phase, while TBBPA mainly existed in the dissolved phase due to its higher water solubility. Significant correlation between lgK_oc and lgK_ow of HFRs was observed in the partitioning between the particulate phase and dissolved phase, but the observed organic carbon partition coefficients (lgK_oc) were different from the predicted organic carbon partition coefficient (lgK_oc), which may be controlled by the suspended particulate matter (SPM) content and dissolved organic carbon (DOC). In addition, whether the equilibrium was attained between dissolved phase and particle phase is another influencing factor for the observation.