...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Human and ecological risk assessment >Are U, Ni, and Hg an Environmental Risk within a RCRA/CERCLA Unit on the U.S. Department of Energy's Savannah River Site?
【24h】

Are U, Ni, and Hg an Environmental Risk within a RCRA/CERCLA Unit on the U.S. Department of Energy's Savannah River Site?

机译：U，Ni和Hg是否在美国能源部萨凡纳河站点的RCRA / CERCLA单元内造成环境风险？

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

The U.S. Department of Energy's Savannah River Site (SRS) is a former nuclear weapon production facility. From 1954-1985, releases of Al, Cu, Cr, Hg, Ni, Pb, U, and Zn were discharged into the Tims Branch-Steed Pond water system. This study investigates whether metal concentrations in Tims Branch's sediment, biofilm, and other biota exceed screening level risk calculations to determine if remedial actions should be pursued for the Contaminants of Potential Concern (U, Ni, Hg). Transfer factors (TFs) were calculated to determine metal concentration changes throughout lower trophic levels and results were compared with sediment benchmarks to create hazard quotients (HQs) to assess risk and a scientific-management decision point. Most TFs for Ni and U from lower to higher trophic level biota were ＜1, suggesting no biomagnifications; however HQs ＞ 1 and cumulative distributions showed the majority of the samples exceeded action levels. Elevated TFs and HQs ＞ 1 in the upper trophic levels for Hg indicated a high degree of bioavailability and biomag-nification. Monte Carlo resampling analyses supported these empirical results. This system should continue to be closely monitored to ensure that contamination does not move off the SRS.
机译：美国能源部的萨凡纳河站点（SRS）是以前的核武器生产设施。从1954年至1985年，Al，Cu，Cr，Hg，Ni，Pb，U和Zn的释放物被排放到Tims Branch-Steed Pond池塘水系统中。这项研究调查了Tims Branch沉积物，生物膜和其他生物区系中的金属浓度是否超过筛选水平风险计算，以确定是否应采取对潜在关注污染物（U，Ni，Hg）的补救措施。计算转移因子（TFs）以确定整个较低营养水平的金属浓度变化，并将结果与​​沉积物基准进行比较以创建危险系数（HQ）来评估风险和科学管理决策点。从较低到较高营养水平的生物区系，Ni和U的大多数TFs ＜1，表明没有生物放大倍数。但是总部> 1和累积分布表明大多数样本超过了行动水平。汞的较高营养水平的TFs和HQs＞ 1表示生物利用度和生物放大倍数较高。蒙特卡洛重采样分析支持了这些经验结果。该系统应继续受到严格监控，以确保污染物不会脱离SRS。

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