International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
Environ Sci Technol. 2010 Apr 1;44(7):2305-8. doi: 10.1021/es9027106.
Surface water and sediment samples concurrently collected in Songhua River in northeastern China from May to October 2006 were analyzed for Dechlorane Plus (DP), a chlorinated flame retardant. Samples were obtained from three main areas: SHR-Rul (rural area of Songhua River), SHR-Hrb (the section of the river within the city of Harbin), and Hrb (urban waters of Harbin). The majority of SHR-Rul water samples (85%) and SHR-Hrb water samples (73%) and 33% of urban water samples (Hrb) were below the detection limit. The mean water DP concentration in Hrb (0.55 +/- 0.81 ng L(-1)) was approximately 3 times greater than the levels measured in SHR-Hrb (0.17 +/- 0.38 ng L(-1)) and more than 15 times greater than the levels measured in SHR-Rul (0.03 +/- 0.07 ng L(-1)). DP detection rates in sediment samples were 50% (Hrb), 100% (SHR-Hrb), and 78% (SHR-Rul). The mean sediment DP concentration in SHR-Hrb (0.11 +/- 0.05 ng g(-1)) was approximately three times greater than that in SHR-Rul (0.04 +/- 0.05 ng g(-1)). These DP concentrations are likely attributable to local sources in urban areas rather than distant sources via long-range transport. The mean fractional abundance of the syn isomer of DP (f(syn)) was 0.34 +/- 0.10 in all water samples, a value indistinguishable from that of a commercial mixture (f(syn) = 0.35), indicating the source was local. The mean f(syn) value of 0.23 +/- 0.06 in all sediment samples suggested a stereoselective depletion of syn-DP relative to the anti-DP isomer in sediments. To our knowledge, this paper represents the first report of DP concentrations in Chinese water and sediments.
2006 年 5 月至 10 月，同时采集了中国东北部松花江中地表水和沉积物样本，对其中的 Dechlorane Plus（DP）进行分析。DP 是一种氯化阻燃剂。这些样本来自三个主要地区：SHR-Rul（松花江农村地区）、SHR-Hrb（哈尔滨市区内河段）和 Hrb（哈尔滨市区水域）。大多数 SHR-Rul 水样（85%）和 SHR-Hrb 水样（73%）以及 33%的城市水样（Hrb）均低于检测限。Hrb 水中 DP 的平均浓度（0.55 +/- 0.81 ng L(-1))）大约是 SHR-Hrb 测量值（0.17 +/- 0.38 ng L(-1))的 3 倍，是 SHR-Rul 测量值（0.03 +/- 0.07 ng L(-1))的 15 倍以上。沉积物样本中 DP 的检出率为 50%（Hrb）、100%（SHR-Hrb）和 78%（SHR-Rul）。SHR-Hrb 沉积物中 DP 的平均浓度（0.11 +/- 0.05 ng g(-1))）大约是 SHR-Rul 的 3 倍（0.04 +/- 0.05 ng g(-1))。这些 DP 浓度可能归因于城市地区的当地来源，而不是通过长距离传输的远距离来源。所有水样中 DP 顺式异构体的平均分数丰度（f(syn))为 0.34 +/- 0.10，与商业混合物（f(syn) = 0.35）的值相同，表明来源是当地的。所有沉积物样本中 0.23 +/- 0.06 的平均 f(syn)值表明，相对于反式 DP 异构体，顺式 DP 在沉积物中存在立体选择性消耗。据我们所知，这是第一篇关于中国水和沉积物中 DP 浓度的报告。
