State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
Alpine Ecosystem Observation and Experiment Station of Gongga Mountain, The Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China.
Environ Geochem Health. 2018 Oct;40(5):1887-1897. doi: 10.1007/s10653-017-9938-1. Epub 2017 Apr 10.
We investigated the occurrence of halogenated flame retardants (HFRs) including polybrominated diphenyl ethers (PBDEs), six novel brominated flame retardants (NBFRs) and dechlorane plus in air and soils on the eastern slope of Mt. Gongga on the eastern Tibetan Plateau. We detected all of the NBFR except bis(2-ethylhexyl)-tetrabromophthalate and pentabromoethyl benzene. NBFRs constituted the most prevalent group. BDE-28 and BDE-47 dominated among the PBDE congeners. Decabromodiphenyl ethane was detected at relatively high levels up to 171 pg/m and 1450 pg/g dry weight in air and soils, respectively; however, it appeared to be easily degraded in the environment. A general decreasing trend was observed among the HFR concentrations with increasing altitude, and this was due to the prominent contribution of source emissions over possible influence of environmental conditions. This study also suggests that HFRs are supplied to forest soils mainly in the form of precipitation and retained in the O horizon layers.
我们研究了卤代阻燃剂（HFRs）在青藏高原东部贡嘎山东坡的空气和土壤中的存在情况，其中包括多溴二苯醚（PBDEs）、六种新型溴化阻燃剂（NBFRs）和十溴二苯乙烷加。我们检测到了除双（2-乙基己基）四溴邻苯二甲酸酯和五溴乙基苯以外的所有 NBFR。NBFR 构成了最普遍的群体。在 PBDE 同系物中，BDE-28 和 BDE-47 占主导地位。十溴二苯乙烷在空气中的浓度高达 171 pg/m，在土壤中的浓度高达 1450 pg/g 干重；然而，它似乎在环境中很容易降解。随着海拔的升高，HFR 浓度呈现出普遍下降的趋势，这是由于源排放的显著贡献，而可能对环境条件的影响较小。本研究还表明，HFRs 主要以降水的形式输送到森林土壤中，并保留在 O 层中。
