...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Riverine Inputs of Polybrominated Diphenyl Ethers from the Pearl River Delta (China) to the Coastal Ocean
【24h】

Riverine Inputs of Polybrominated Diphenyl Ethers from the Pearl River Delta (China) to the Coastal Ocean

机译：珠江三角洲（中国）到沿海海洋的多溴联苯醚的河川输入

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

Riverine runoff is an important mode to transport anthropogenic pollutants from terrestrial sources to oceans. Polybrominated diphenyl ethers (PBDEs) were measured in riverine runoff samples from the eight major outlets within the Pearl River Delta (PRD), China, an economically fast developing region housing a vast number of electronics manufacturing and assembling plants. The ∑_(17)~- PBDEs (sum of 17 BDE congeners, i.e., BDE-28, -47, -66, -85, -99, -100, -138, -153, -154, -183, -196, -197, -203, -206, -207, -208, and -209) concentrations varied from 344 to 68 000 pg/ L, with those of BDE-209, BDE-47, and BDE-99 being 335-65 200,3-143, and < 1-200 pg/L, respectively. These levels were in the high end of the global PBDEs concentrations in the aquatic environments. The monthly inputs of ∑_(17)~- PBDEs ranged from 0.21 to 215 kg at individual outlets, and the annual input of ∑_(17)~-PBDES from all the outlets was estimated at 2140 kg/year. Of the target BDE congeners, BDE-209 was the most predominant component with an annual input of 1960 kg/year, followed by BDE-47 (13.3 kg/ year) and BDE-99 (11.7 kg/year). An extrapolation of the past use of PBDEs in the region concluded that 23 metric tons of ∑_(17)~-PBDEs have been discharged into the coastal ocean from the PRD in the last 20 years. The amount of PBDEs imported to China in the form of e-waste was estimated at 35 000 metric tons/year, higher than the annual domestic production of brominated fire retardants (～10 000 metric tons/year) and the annual riverine input of total PBDEs from the PRD, suggesting that the majority of PBDEs inventory has been accumulated from importation of e-wastes. Because of the continuous importation of e-wastes and strong demand for brominated fire retardants, the impact of PBDEs on China's and the world's environments is expected to persist for many years to come.
机译：河流径流是将人为污染源从陆地来源转移到海洋的一种重要方式。在中国珠江三角洲（PRD）的八个主要出口的河流径流样品中测量了多溴联苯醚（PBDEs），该地区是经济快速发展的地区，拥有大量电子制造和装配工厂。 ∑_（17）〜-PBDEs（17个BDE同系物的总和，即BDE-28，-47，-66，-85，-99，-100，-138，-153，-154，-183，- 196，-197，-203，-206，-207，-208和-209）浓度在344至6.8 pg / L之间变化，其中BDE-209，BDE-47和BDE-99的浓度为335- 65 200,3-143和<1-200 pg / L。这些水平处于水生环境中全球多溴二苯醚浓度的高端。每个出口的∑_（17）〜-PBDEs每月输入量在0.21到215 kg之间，估计所有出口的∑_（17）〜-PBDES的年输入量为2140 kg /年。在目标BDE同系物中，BDE-209是最主要的成分，年输入量为1960 kg /年，其次是BDE-47（13.3 kg /年）和BDE-99（11.7 kg /年）。根据该地区过去多溴二苯醚的使用情况推断，在过去的20年中，已有23吨∑_（17）〜-PBDEs从珠三角排放到沿海海洋中。据估计，以电子废物的形式进口到中国的多溴二苯醚的数量为每年3.5万吨，高于国内溴化阻燃剂的年产量（约10000吨/年）和河川总年输入量。珠三角的多溴二苯醚表明，大多数多溴二苯醚清单是从电子废物进口中积累的。由于电子废物的不断进口以及对溴化阻燃剂的强劲需求，预计多溴二苯醚对中国和世界环境的影响将持续很多年。

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