Detection of Dechlorane Plus and brominated flame retardants in marketed fish in Japan

Fish samples purchased from Japanese markets were analyzed for Dechlorane Plus (DP)(syn-, anti-), polybrominated diphenyl ether (PBDE), and hexabromocyclododecane (HBCD)(α, γ). Twenty fish were analyzed using gas chromatography-mass spectrometry for DP and PBDE, and using liquid chromatography-tandem mass spectrometry for HBCD. DP was detected in 18 samples and ∑DP concentrations were <0.2-14.2 pg g⁻¹ wet wt. Among the DP isomers, anti-DP was the dominant residue observed in this study. PBDE was detected in all samples. Concentrations of ∑PBDE ranged from 2.2 to 878 pg g⁻¹ wet wt. HBCD was detected in 18 samples, and ∑HBCD concentrations were <0.02-21.9 ng g⁻¹ wet wt. In fish landed near the East China Sea and the Sea of Japan, we detected relatively high concentrations of DP, PBDE, and HBCD. These results indicate that the seawaters around East Asia are contaminated with flame retardants. This study demonstrates the presence of DP in fish marketed in Japan for the first time.     

电子垃圾回收地得克隆的污染水平及分布特征

对浙江某电子垃圾回收地水体、沉积物、土壤以及大气中得克隆（DP）的污染水平及分布特征进行了调查。结果表明,水、沉积物、土壤和大气样品中均检测出了 DP,分别为0．843～1．56 ng/L,0．185～7．03 ng/g干重,0．115～26．4 ng/g干重和11．2 pg/m3;该区域 DP分布特征表明电子垃圾的拆解和焚烧是环境中 DP的重要来源。     

江苏省淮安市大气中德克隆浓度水平及时空分布特征

为评估淮安市大气中DP（德克隆）的水平及分布特征,于2016—2018年采用大气被动采样方法,共收集了96个大气样品,对大气中ρ（DP）、ρ（syn-DP）（syn-DP为顺式DP）和ρ（anti-DP）（anti-DP为反式DP）进行分析,结合f_syn〔ρ（syn-DP）占ρ（DP）的比例〕分布模式,追溯大气中DP的迁移转化规律.结果表明:①所有样品中均检出DP,厂界内大气中ρ（DP）范围为1 925~4 221 pg/m3,平均值为3 053 pg/m3;除厂界内采样点外,其他采样点大气中ρ（DP）范围为9~92 pg/m3,平均值为42 pg/m3.②ρ（DP）最高值出现在厂界内采样点,其ρ（DP）比厂界外采样点高约3个数量级.③大气中ρ（DP）分布受季节性影响较为明显,呈冬季高、夏季低的特征.④厂界内采样点f_syn平均值为0.26,厂界外采样点的f_syn值在0.18~0.53之间,平均值为0.28,与厂界内采样点大气中DP的f_syn平均值相当.研究显示,淮安市大气中的高水平DP主要来源于DP生产,f_syn值受季节和空间变化的影响.