Spatial Distribution and Seasonal Variation of Organophosphate Esters in Air above the Bohai and Yellow Seas, China,Environmental Science & Technology

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Spatial Distribution and Seasonal Variation of Organophosphate Esters in Air above the Bohai and Yellow Seas, China
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1021/acs.est.7b03807
Jing Li _{1,

2} , Jianhui Tang ₃ , Wenying Mi ₄ , Chongguo Tian ₃ , Kay-Christian Emeis _{1,

2} , Ralf Ebinghaus ₁ , Zhiyong Xie ₁

Affiliation

Nine organophosphate esters (OPEs) were investigated in air samples collected over the Bohai and Yellow Seas (East Asia) during a research cruise between June 28 and July 13, 2016. These same OPEs were quantified at a research site (North Huangcheng Island, NHI) in the middle of the Bohai Strait from May 16, 2015, to March 21, 2016. The median total OPE (ΣOPE) concentration over the Bohai and Yellow Seas was 280 pg/m³. Tris(1-chloro-2-propyl) (TCPP) was the most abundant OPE, followed by tris(2-chloroethyl) phosphate (TCEP), tri-iso-butyl phosphate (TiBP), and tri-n-butyl phosphate (TnBP). Particle-bound OPEs accounted for 51 ± 21% of the total OPEs. On NHI, the median ΣOPE concentration was 210 pg/m³, and the average particle-bound fraction was 82 ± 17%. For samples collected on NHI, significant negative linear correlations were found between the gaseous OPEs and 1/T (T: temperature (K)) (except TDCP, TPeP, and TCP). Among the 79 investigated samples, significant correlations between the measured OPE gas/particle partitioning coefficients (K_p,m) and subcooled liquid pressure (P_L^◦) (p < 0.05) were found for only 14 samples, suggesting that OPEs have low potential to achieve equilibrium or ascribe to the artificial sampling. The annual dry deposition input of OPEs into the Bohai and Yellow Seas is estimated to be 12 tons/year.

中文翻译：

渤海和黄海上方空气中有机磷酯的空间分布和季节性变化

在2016年6月28日至7月13日期间的一次研究航行中，对在渤海和黄海（东亚）收集的空气样本中的9种有机磷酸酯进行了调查。在研究地点（北黄城岛，NHI）对这些OPE进行了定量）从2015年5月16日到2016年3月21日在渤海海峡中部。渤海和黄海的总OPE（ΣOPE）中位数浓度为280 pg / m ³。三（1-氯-2-丙基）（TCPP）是最丰富的OPE，其次是三（2-氯乙基）磷酸酯（TCEP），磷酸三异丁酯（TIBP），和三- Ñ丁基磷酸酯（ TnBP）。颗粒结合的OPE占总OPE的51±21％。在NHI上，中位数ΣOPE浓度为210 pg / m ³，平均颗粒结合分数为82±17％。对于在NHI上采集的样品，发现气态OPE与1 / T（T：温度（K））之间存在显着的负线性相关（TDCP，TPeP和TCP除外）。间的79克研究的样品，测得的OPE气体/粒子分配系数（间显著相关ķ _P，M）和过冷液体压力（P_大号^◦）（p被发现仅用于14个样品<0.05），这表明的OPE具有低电势达到平衡或归因于人工抽样。每年在渤海和黄海中的OPE的干沉降量估计为12吨/年。

更新日期：2017-12-15

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