在2009-2010年南半球夏季，用大流量采样器(high-volume air sampler，HVAS)和聚胺酯泡沫(polyurethane foam，PUF)被动采样器采集了南极菲尔德斯半岛和阿德利岛6个点的大气样品，分析了 HBCDs的浓度水平、异构体组成、气相-颗粒相分配和空间分布趋势。主动和被动采集大气样品中ΣHBCDs浓度(α-HBCD、β-HBCD、γ-HBCD的浓度)范围分别为n。d。(未检出)—2。73 pg·m-3和0。41-3。39 pg·m-3，与北极和偏远地区浓度水平一致，远低于城市和工业区的污染水平。HBCDs在主动采集的颗粒相和气相中的平均比例分别为67％和33％，颗粒相以α-HBCD(57％)为主，气相以γ-HBCD(53％)为主;被动采集的PUF样品中γ-HBCD(64％)占优势。经过主动采样和被动采样的对比研究，对采样速率进行校正后，PUF被动采样器可以用于南极大气样品的采集。南极大气中HBCDs的检出，表明HBCDs具有持久性和潜在的长距离大气传输能力;南极长城站附近大气中HBCDs浓度水平略高，反映了有限的人类活动对南极环境产生了影响。
Analysis of Hexabromocyclododecanes(HBCDs)in the atmosphere in Fildes Peninsula and Ardley Island,Antarctica
Air samples were collected in the austral summer of 2009-2010 at six sites in Fildes Peninsula and Ardley Island,Antarctica to investigate the levels,isomer profiles,gas-particle distribution of HBCDs using high-volume air samplers(HVAS)and polyurethane foam(PUF)-disk based passive air samplers.The concentrations of ΣHBCDs(sum of α-,β-and γ-HBCD)in air samples from active air sampling and passive air sampling were in the ranges of n.d.(not detected)—2.73 pg·m-3 and 0.41-3.39 pg·m-3 respectively,which were comparable with those from the Arctic regions and remote sites,and much lower than those from urban areas and industrial districts.For active air sampling,the average percentage of HBCDs were 67％and 33％in the particle-phase and gas-phase,respectively,and α-HBCD(57％)was the dominant isomer in the particle-phase,whereas γ-HBCD(53％)dominated in the gas-phase.As for passive air sampling,the PUF samples were dominated by γ-HBCD(64％).Comparative study of active air sampling and passive air sampling demonstrates the feasibility of using PUF passive samplers in Antarctica after the calibration of sampling rates.The presence of HBCDs in Antarctica suggests that HBCDs are persistent and have potential for long-range atmospheric transport,and the slightly higher level of HBCDs at the Great Wall Station site also reflects the effects of limited anthropogenic activities on the Antarctic environment.
HBCDsisomerAntarcticaactive air samplingpassive air sampling
NETL
NSTL
万方数据
