...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Influence of Organic Matter Content and Human Activities on the Occurrence of Organic Pollutants in Antarctic Soils, Lichens, Grass, and Mosses
【24h】

Influence of Organic Matter Content and Human Activities on the Occurrence of Organic Pollutants in Antarctic Soils, Lichens, Grass, and Mosses

机译：有机质含量和人类活动对南极土壤，地衣，草和青苔中有机污染物的发生的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Banned pesticides such as HCB and p,p'-DD£., and other legacy and ongoing pollutants such as PCBs and PAHs, were measured in different vegetation types and soil samples collected at selected areas from Antarctic Peninsula (Deception and Livingstone Islands, Southern Shetlands). Two Antarctic expeditions (in 2005 and 2009) were carried out to assess POPs levels at remote areas, and close to current and abandoned Antarctic research settlements, to assess potential sources of pollutants. Overall, the patterns in lichens, mosses, and grass were dominated by low molecular PCB congeners and PAHs and the presence of HCB and p,p'-DDE rather than heavier compounds, suggesting the importance of long-range atmospheric transport of POPs as the main vector for the introduction of these chemicals to Antarctica. Statistically significant correlations (p-level < 0.05) between concentrations in vegetation of PCBs, p,p '-DDE, and the more volatile PAHs with lipid content were found with r~2 of 0.22-0.52 for PCBs, 0.42 for p,p'-DDE, and 0.44-0.72 for the more volatile PAHs. Thus, lipid content is an important factor controlling POPs in Antarctic lichens, mosses, and grass. A strong significant dependence of HCB (r~2 = 0.83), p,p'-DDE (r~2 = 0.60), and PCBs (r~2 = 0.36-0.47) concentrations in soil on its organic carbon content was also observed, indicating the important role of soil organic matter (SOM) in the retention of PCBs and OCPs in Polar Regions, where SOM content is low. Penguin colonies enhance the SOM content in some areas which is reflected in higher concentrations of all POPs, especially of persistent compounds such as p,p'- DDE. Higher concentrations of PCBs and PAHs found at the currently active Byers Camp (in an Antarctic Specially Protected Area) were explained by higher SOM content, thus indicating that Antarctic regulations are being successfully fulfilled in this small research area. On the other hand, PAHs in soils proximate to current Juan Carlos I research station show that even small human settlements are an important source of PAHs to the local environment. Therefore, even though the concentrations in Antarctica are low, there is evidence of local hotspots of contamination.
机译：在南极半岛某些地区（欺骗和利文斯通群岛，南部）的不同植被类型和土壤样品中，测量了禁用的农药（例如HCB和p，p'-DD£。）以及其他遗留和正在进行的污染物（例如PCB和PAHs）。设得兰群岛）。进行了两次南极考察（2005年和2009年），以评估偏远地区，靠近当前和废弃的南极研究定居点的持久性有机污染物含量，以评估潜在的污染物来源。总体而言，地衣，苔藓和草丛中的模式主要由低分子PCB同源物和PAHs以及HCB和p，p'-DDE而不是较重的化合物组成，这表明POPs在大气中的远距离运输很重要。将这些化学物质引入南极洲的主要载体。多氯联苯植被中的浓度，p，p'-DDE和具有脂质含量的挥发性更高的多环芳烃之间存在统计学上的显着相关性（p水平<0.05），r〜2对于多氯联苯为0.22-0.52，对于p，p为0.42 -DDE，而对于挥发性更高的PAH，则为0.44-0.72。因此，脂质含量是控制南极地衣，苔藓和草中持久性有机污染物的重要因素。还观察到土壤中六氯代苯（r〜2 = 0.83），p，p'-DDE（r〜2 = 0.60）和PCBs（r〜2 = 0.36-0.47）浓度强烈依赖于其有机碳含量，表明土壤有机质（SOM）在SOM含量低的极区中PCB和OCP保留中的重要作用。企鹅菌落提高了某些地区的SOM含量，这反映在所有POP，尤其是持久性化合物（例如p，p'-DDE）的较高浓度中。较高的SOM含量可以解释当前活跃的Byers营地（在南极特殊保护区）发现的PCBs和PAHs浓度较高，因此表明在这个小型研究区中，南极法规已得到成功实施。另一方面，当前胡安·卡洛斯一世研究站附近土壤中的多环芳烃表明，即使很小的人类住区也是当地环境中多环芳烃的重要来源。因此，即使南极洲的浓度很低，也有证据表明存在局部污染热点。

著录项

  • 来源
    《Environmental Science & Technology》 |2012年第3期|p.1396-1405|共10页
  • 作者

    Ana Cabrerizo; Jordi Dachs; Damia Barcelo; Kevin C. Jones;

  • 作者单位

    Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, Barcelona, 08034, Catalonia, Spain;

    Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, Barcelona, 08034, Catalonia, Spain;

    Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18-26, Barcelona, 08034, Catalonia, Spain;

    Lancaster Environment Centre, Lancaster University, Lancaster, LAI 4YQi U.K.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号