Atmospheric hexachlorobenzene determined during the third China arctic research expedition: Sources and environmental fate

Atmospheric hexachlorobenzene determined during the third China arctic research expedition: Sources and environmental fate
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中国第三次北极科考期间测定的大气六氯苯:来源和环境归宿

DOI:
10.5094/apr.2014.056
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发表时间:
2014-07
影响因子:
4.5
通讯作者:
Lam,P.K.S.
Lam,P.K.S.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Xia,C.H.;Kang,H.;Xie, Z.Q.;Lam,P.K.S.

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摘要2008年7月至9月,在2008年中国北极科学考察计划的支持下,在“雪龙”号考察破冰船上采集了大气样品。所有的空气样品进行了分析,以确定六氯苯(HCB)的浓度。六氯代苯的浓度范围为24至180 pg m-3,平均浓度为88 pg m-3。总体而言,六氯苯在北太平洋和北冰洋的分布较其他有机氯污染物均匀。从地理上看,六氯苯的平均浓度从高到低依次为:北冰洋中部(110 ± 57 pg m −3)、楚科奇海和博福特海(93 ± 29 pg m −3)、东亚(75 ± 49 pg m −3)和北太平洋(69 ± 38 pg m −3)。在东亚海和北太平洋,来自附近大陆和/或海洋的六氯苯的初次和二次排放都可能导致大气中的六氯苯。在北极,2008年夏季海冰的剧烈融化可能导致六氯苯的重新流动,并提高该区域大气中的六氯苯含量。
Abstract In July to September 2008, air samples were collected aboard a research expedition icebreaker, Xuelong (Snow Dragon), under the support of the 2008 Chinese Arctic Research Expedition Program. All the air samples were analyzed for determination of the concentrations of Hexachlorobenzene (HCB). The levels of HCB ranged from 24 to 180 pg m −3 , with an average concentration of 88 pg m −3 . Generally, HCB were more uniform than other organchlorine pollutants in the North Pacific Ocean and the Arctic Ocean. Geographically, the average concentrations of HCB from high to low were in the following order: the Central Arctic Ocean (110 ± 57 pg m −3 ), the Chukchi and Beaufort Seas (93 ± 29 pg m −3 ), the East Asia (75 ± 49 pg m −3 ) and the North Pacific Ocean (69 ± 38 pg m −3 ). In the East Asia Sea and the North Pacific Ocean, both primary and secondary emissions of HCB from the nearby continents and/or oceans might contribute to the atmospheric HCB. In the Arctic, intense sea–ice melting in the summer of 2008 might result in the remobilization of HCB and enhance its atmospheric levels in this region.
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