GKSS Research Centre Geesthacht GmbH, Institute for Coastal Research, Max-Planck-Strasse 1, 21502 Geesthacht, Germany.
Environ Sci Technol. 2010 Dec 1;44(23):8977-82. doi: 10.1021/es103047n. Epub 2010 Nov 3.
Dechlorane Plus (DP), a highly chlorinated flame retardant, was investigated in marine boundary layer air and surface seawater from East Greenland Sea and in the Northern and Southern Atlantic toward Antarctica. The concentrations of DP ranged from 0.05 to 4.2 pg m(-3) in the atmosphere and from <MDL to 1.3 pg L(-1) in seawater. The occurrence of DP even in the remote areas of the Arctic and Antarctica suggests that DP is susceptible to long-range atmospheric transport (LRAT). Along the Atlantic atmosphere, the highest concentration was observed in the English Channel originating from continental air passing Western Europe indicating Western Europe as source region of DP in the marine environment. Thereby, the fractional abundance of the syn isomer (f(syn)) increased with decreasing northern latitude from 0.37 which is close to the commercial mixture (f(syn) = 0.32) to ∼0.67 showing a stereoselective depletion of the anti isomer likely caused by UV-sunlight during LRAT. In addition, two degradation products ([-1Cl+1H] and [-2Cl+2H]) were detected in seawater from the Arctic. This paper presents the first report of DP in the marine environment, especially in remote areas, together with stereoselective LRAT potential.
戴氯烷 Plus（DP），一种高度氯化的阻燃剂，在东格陵兰海的海洋边界层空气和表层海水中，以及在向南极洲的北大西洋和南大西洋进行了研究。DP 在大气中的浓度范围为 0.05 到 4.2 pg m(-3)，在海水中的浓度范围为 <MDL 到 1.3 pg L(-1)。DP 甚至在北极和南极洲的偏远地区存在，表明 DP 容易受到长程大气传输（LRAT）的影响。在大西洋大气中，在英吉利海峡中观察到的浓度最高，这是源于经过西欧的大陆空气的，表明西欧是 DP 在海洋环境中的源区。因此，顺式异构体的分数丰度（f(syn)）随着纬度的降低而增加，从接近于商业混合物（f(syn) = 0.32）的 0.37 增加到约 0.67，表明反式异构体在 LRAT 过程中可能由于紫外线阳光而具有立体选择性的耗尽。此外，在北极的海水中还检测到了两种降解产物（[-1Cl+1H] 和 [-2Cl+2H]）。本文首次报道了 DP 在海洋环境中的存在，特别是在偏远地区，同时还报道了立体选择性 LRAT 潜力。
