Mirror image between gas-particle partitioning and soil-moss distribution of polybrominated diphenyl ethers in the polar regions
Mirror image between gas-particle partitioning and soil-moss distribution of polybrominated diphenyl ethers in the polar regions
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极地地区多溴二苯醚气体-颗粒分配与土壤-苔藓分布的镜像
DOI：
10.1016/j.scitotenv.2018.11.452
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发表时间：
2019
影响因子：
9.8
通讯作者：
Jiang Guibin
中科院分区：
文献类型：
--
作者：
Ma Xindong;Wang Zhen;Yu Limin;Yao Wenjun;Xiao Lin;Yao Ziwei;Na Guangshui;Wang Yawei W;Jiang Guibin
研究了多溴联苯醚（PBDEs）在北极斯瓦尔巴群岛Ny -Ålesund和南极洲菲尔德斯半岛King Georgia岛（KGI）的大气、土壤和苔藓中的浓度和同源特征。多溴二苯醚的同源剖面在Ny -Ålesund和KGI的气体和苔藓之间以及颗粒和土壤之间都是对称的，类似于“镜像”。高溴化同系物（BDE-99、- 153和- 183）在颗粒相和土壤中所占比例均高于气相和苔藓，而三溴化和四溴化bde在气相和苔藓中所占比例均较高。与城市地区相比，两个站点的多溴二苯醚气粒分配系数（Kp）和过冷液体蒸汽压（p°L）之间的对数对数线性相关斜率有所变化。此外，logKpvs的斜率。logp°L（在Ny -Ålesund和 - 0.29）与无因次土壤-苔藓商（QSM）与p°L（在Ny -Ålesund和KGI分别为- 0.42和- 0.22）之间的对数-对数线性相关斜率显著接近。两个站点的颗粒分数（φparticle）与土壤分数（φsoil）呈显著相关，表明多溴二苯醚的气粒分配与其在苔藓和土壤中的分布有直接关系。
The concentrations and congener-specific profiles of polybrominated diphenyl ethers (PBDEs) were investigated in the atmosphere, soil and moss samples were collected from Ny–Ålesund, Svalbard in the Arctic and King Georgia Island (KGI), Fildes Peninsula in Antarctica, respectively. The congener profiles of PBDEs were symmetrical between gas and moss, as well as between particles and soil at Ny–Ålesund and KGI, respectively, similar to a “mirror image”. The proportions of highly brominated congeners (for example, BDE–99, –153 and –183) in the particle phase and soil were higher than those in the gas phase and moss, while tri– and tetra–BDEs possessed higher proportions in the gas phase and moss at both sites. The slopes of log–log linear correlations between the gas–particle partition coefficient (Kp) and sub–cooled liquid vapor pressures (p°L) of PBDEs were observed at both sites compared with the values in the urban areas. Moreover, the slopes of logKpvs. logp°L(−0.51 at Ny–Ålesund and − 0.29 at KGI) were notably close to the slopes of log–log linear correlations between the dimensionless soil–moss quotient (QSM) andp°L(−0.42 at Ny–Ålesund and −0.22 at KGI). Significant correlations between particle fraction (φparticle) and soil fraction (φsoil) at both sites indicated that the gas–particle partitioning of PBDEs is directly related to their distribution in moss and soil.