...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Snow Deposition and Melting as Drivers of Polychlorinated Biphenyls and Organochlorine Pesticides in Arctic Rivers, Lakes, and Ocean
【24h】

Snow Deposition and Melting as Drivers of Polychlorinated Biphenyls and Organochlorine Pesticides in Arctic Rivers, Lakes, and Ocean

机译：雪的沉积和融化是北极河流，湖泊和海洋中多氯联苯和有机氯农药的驱动因素

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

Concurrent sampling of freshwater (lakes and rivers), seawater, snow, air, and zooplankton for a range of legacy polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) was undertaken in the Canadian High Arctic during ice-covered, melting, and ice-free conditions. Overall, there was a general trend of higher fluvial PCB/OCP concentrations associated with the spring snow melt (early-mid June), while much lower concentrations were detected during the snow-free season (end of July). In contrast, PCB concentrations in two Arctic lakes (West and East Lakes, Melville Island) and in ocean waters, sharply increased in the ice-free period, likely because of inputs from the ice/snow layer melting and river runoff. The resulting air-water fugacity ratios and fluxes followed a remarkable shift during the sampling campaign. PCBs and OCPs shifted from equilibrium during ice/snow-covered conditions toward a clear net volatilization of PCBs and most of the OCPs during snow/ice-free conditions. Differences in the bioaccumulation factor for PCB/OCPs in zooplankton between West and East Lakes were observed, likely because of zooplankton being exposed to more contaminated food in West Lake due to higher turbidity related to in-lake disturbances.
机译：在加拿大高北极地区，在冰雪覆盖，融化和结冰期间，对淡水（湖泊和河流），海水，雪，空气和浮游动物进行了同时采样，以获取一系列传统的多氯联苯（PCB）和有机氯农药（OCP）。无条件。总体而言，春季融雪（6月上中旬）总体上有较高的河流PCB / OCP浓度趋势，而在无雪季节（7月底）检测到的浓度要低得多。相反，在无冰期，两个北极湖（西湖和东湖，梅尔维尔岛）和海水中的PCB浓度急剧增加，这可能是由于冰/雪层融化和河流径流引起的。在采样过程中，产生的空气-水逸度比和通量发生了显着变化。在冰雪覆盖的条件下，PCB和OCP从平衡状态转变为在无冰/冰的条件下，PCB和大多数OCP的净净挥发分明显。观察到西湖和东湖之间浮游动物中PCB / OCPs的生物蓄积因子存在差异，这可能是由于浮游动物由于与湖内扰动相关的更高的浊度而暴露于西湖中受更多污染的食物。

著录项

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