...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >EFFECT OF CYCLODEXTRIN AND TRANSFORMER OIL AMENDMENTS ON THE CHEMICAL EXTRACTABILITY OF AGED [~(14)C]POLYCHLORINATED BIPHENYL AND [~(14)C]POLYCYCLIC AROMATIC HYDROCARBON RESIDUES IN SOIL
【24h】

EFFECT OF CYCLODEXTRIN AND TRANSFORMER OIL AMENDMENTS ON THE CHEMICAL EXTRACTABILITY OF AGED [~(14)C]POLYCHLORINATED BIPHENYL AND [~(14)C]POLYCYCLIC AROMATIC HYDROCARBON RESIDUES IN SOIL

机译：环糊精和转化油的改性对老化的[〜（14）C]多氯联苯和[〜（14）C]多环芳烃的化学残基的化学萃取性

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

Sequestration of hydrophobic organic contaminants (HOCs) in soils limits chemical and biological availability. Concerns exist regarding the long-term stability of sequestered contaminants in the environment, and stability needs to be demonstrated if bioavailability considerations are to be adopted into the risk assessment and remediation of contaminated land. The aim of the present study was to test the short-term influence of two organic amendments on the chemical extractability of HOC residues that had been present in soils for more than 12 years. The amendments investigated were cyclodextrin and transformer oil (a light, non-aqueous phase liquid [LNAPL]). The contaminants investigated were fluoranthene and benzo[a]pyrene in one soil and the poly-chlorinated biphenyls (PCBs) 28 and 52 in a second soil. The addition of cyclodextrin to the soils did not result in a significant increase in chemical extractability of the residues after a 36-d contact time. The addition of transformer oil resulted in an increase in chemical extractability of the PCBs after a 14-d soil-LNAPL contact time and a further increase after a 36-d contact time. The present study demonstrates that the chemical availability of aged HOCs in soil may be influenced by the presence of other chemicals and has implications for the long-term management of contaminated land.
机译：螯合土壤中的疏水性有机污染物（HOC）限制了化学和生物利用度。存在对环境中螯合污染物的长期稳定性的担忧，如果要在污染评估和补救中采用生物利用度考虑因素，则需要证明其稳定性。本研究的目的是测试两种有机改良剂对土壤中存在超过12年的HOC残留物的化学可萃取性的短期影响。所研究的改良剂是环糊精和变压器油（轻质非水相液体[LNAPL]）。调查的污染物是一种土壤中的荧蒽和苯并[a] re，另一种土壤中的多氯联苯（PCBs）28和52。在36天的接触时间后，向土壤中添加环糊精不会导致残留物的化学可萃取性显着提高。在14天的土壤-LNAPL接触时间后，添加变压器油导致PCB的化学萃取性增加，而在36天的接触时间后，PCB的化学萃取性进一步增加。本研究表明，土壤中老化的HOC的化学有效性可能受到其他化学物质的存在的影响，并且对受污染土地的长期管理具有影响。

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