Air-plant exchange of brominated flame retardants at a rural site: Influencing factor, interspecies difference, and forest scavenging
Air-plant exchange of brominated flame retardants at a rural site: Influencing factor, interspecies difference, and forest scavenging
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农村地区溴化阻燃剂的空气-植物交换：影响因素、种间差异和森林清除
DOI：
10.1002/etc.2195
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发表时间：
2013
影响因子：
4.1
通讯作者：
Mai Bi-Xian
中科院分区：
文献类型：
--
作者：
Tian Mi;Chen She-Jun;Luo Yong;Wang Jing;Zhu Zhi-Cheng;Luo Xiao-Jun;Mai Bi-Xian
对中国南方某农村地区桉树叶和松针中的溴化阻燃剂进行了测定，以调查空气-植物交换。松针中BFRs的平均浓度（79.8 ng/g干wt）高于桉树叶（74.5 ng/g），而叶表面颗粒的平均浓度则相反，分别为3490 ng/g和5718 ng/g。对于大多数BFRs，其在植物中的浓度与该站点的气相、大气颗粒、叶表面颗粒和环境变量（温度、风速和相对湿度）的浓度之间的相关性与作者之前在一个电子废物站点观察到的结果相反，表明环境空气水平在关系中起着至关重要的作用。物种间BFR分布的差异和上述相关性表明，松针可能比桉树叶更有利于从气体沉积中吸收BFR，而桉树叶的颗粒结合沉积更为重要。与电子垃圾填埋场一样，BFRs的叶片清除率也受其辛醇-空气分配系数的控制。据估计，该地区森林每年在大气中清除约154 kg的生物固溶体，是大气沉降到非森林地面的1.7倍。环境化学，2013;32(2):1248 - 1253。©2013 setac
Brominated flame retardants (BFRs) in eucalyptus leaves and pine needles from a rural site in southern China were measured to investigate the air–plant exchange. Mean concentrations of BFRs were higher in pine needles (79.8 ng/g dry wt) than in eucalyptus leaves (74.5 ng/g), whereas an inverse result was found for the leaf surface particles, with mean concentrations of 3490 ng/g and 5718 ng/g, respectively. For most of the BFRs, the correlations between their concentrations in plants and those in the vapor phase, atmospheric particles, leaf surface particles, and the environmental variables (temperature, wind speed, and relative humidity) at this site were in contrast to the results the authors observed at an electronic waste site previously, indicating that ambient air level plays a vital role in the relationships. The interspecies difference in the BFR profiles and the correlations above implied that pine needles likely have more advantages for uptake of BFRs from gaseous deposition than eucalyptus leaves, for which particle‐bound deposition is more important. Like the electronic waste site, the leaf scavenging ratios of BFRs were also controlled by their octanol–air partition coefficient. It was estimated that approximately 154 kg of BFRs in the atmosphere are scavenged annually by forest in this region, which was 1.7 times larger than that via atmospheric deposition to nonforest ground.Environ Toxicol Chem2013;32:1248–1253. © 2013 SETAC