• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Application of hydroxypropyl[β]cyclodextrin to evaluation of polycyclic aromatic hydrocarbon losses during sewage sludges composting
【24h】

Application of hydroxypropyl[β]cyclodextrin to evaluation of polycyclic aromatic hydrocarbon losses during sewage sludges composting

机译：羟丙基[β]环糊精在评价污泥堆肥过程中多环芳烃损失中的应用

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 aims of the present study were to test the application of the non-exhaustive extraction technique (NEET) with hydroxypropyl[β]cyclodextrin (HPCD) for the evaluation of the content of potentially bioavailable polycyclic aromatic hydrocarbon (PAH) fraction as well as the evaluation of changes in the content of this fraction during composting of municipal sewage sludges. A possibility to apply this method for the forecasting of PAH losses during composting was also studied. Four sludges (from different sewage treatment plants) with varied properties have been selected for the present experiment. The sludges were composted for 76 days. PAH content was determined as extracted with dichloromethane (exhaustive extraction technique) and potentially bioavailable PAH content by means of HPCD (non-exhaustive extraction technique) in both sewage sludges and composts obtained from them. The content of fraction extracted with HPCD ranged from 63.5 to 83.1% depending on the sludge. After composting, a significant lowering of this fraction contribution was noted for 3 sludges. However, in the composts obtained, the fraction extracted with HPCD still constituted 54.7-62.1% of the total PAH content. The composting process clearly influenced a decrease in the bioavailable fraction in the case of 3- and 5-ring PAHs. However, the 4-ring PAHs content of bioavailable fraction did not undergo any significant changes. No satisfactory results were obtained when HPCD was used as a tool to forecast PAH losses. In a number of cases only, PAH remaining after HPCD extraction achieved a value similar to that of PAH after the composting process. In the case of a number of PAH, the method with HPCD application changed the values of the bioavailable fraction.
机译：本研究的目的是测试非穷尽萃取技术（NEET）与羟丙基[β]环糊精（HPCD）的应用，以评估潜在的生物利用多环芳烃（PAH）馏分的含量以及评估城市污水污泥堆肥过程中该馏分含量的变化。还研究了将该方法用于堆肥过程中PAH损失预测的可能性。本实验选择了四种具有不同特性的污泥（来自不同的污水处理厂）。将污泥堆肥76天。确定的PAH含量是用二氯甲烷（穷举提取技术）提取的，潜在的生物利用PAH含量是通过HPCD（非穷举提取技术）测定的污泥和从其获得的堆肥中的生物利用度。根据污泥的不同，用HPCD萃取的馏分含量为63.5％至83.1％。堆肥后，注意到3种污泥的这一部分贡献显着降低。但是，在获得的堆肥中，用HPCD萃取的部分仍占PAH总含量的54.7-62.1％。在3环和5环PAHs的情况下，堆肥过程明显影响了生物利用度的降低。但是，生物可利用级分的四环PAHs含量没有发生任何显着变化。当将HPCD用作预测PAH损失的工具时，未获得令人满意的结果。仅在许多情况下，HPCD提取后残留的PAH值类似于堆肥处理后的PAH值。在使用多个PAH的情况下，应用HPCD的方法会更改生物可利用分数的值。

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