...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Optimization of an Aerobic Polishing Stage To Complete the Anaerobic Treatment of Munitions-Contaminated Soils
【24h】

Optimization of an Aerobic Polishing Stage To Complete the Anaerobic Treatment of Munitions-Contaminated Soils

机译：优化需氧抛光步骤以完成对弹药污染土壤的厌氧处理

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 addition of an external carbon source to allow the creation of anaerobic conditions for the remediation of soils contaminated with nitroaromatic compounds has been successfully applied to soils contaminated with Dinoseb (2-sec-butyl-3,4-dinitro-o-cresol), an herbicide, and 2,4,6-trinitrotoluene (TNT), an explosive. The addition of an aerobic stage to remove excess external carbon after the anaerobic stage produces a treated soil with a lower oxygen demand than the soil, which is presently left after the anaerobic stage. The use of acetate, soluble starch, glucose, and insoluble starch as sources of external carbon for the creation and maintenance of anaerobic conditions was examined. The addition of glucose to statically incubated soil reactors allowed for the fastest reduction in redox potential and produced cultures with the lowest redox potentials (-400 mV). The amount of glucose added was optimized resulting in the use of 0.25% (w/v) glucose to treat a sandy soil contaminated with 12 000 mg of TNT, 3000 mg of RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), and 30 mg of HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetraazo-cine)/kg of soil. In these treatments, the anaerobic stage was complete within 14 days, and an additional 7-day aerobic stage resulted in TOC concentrations of 30 mg/L remaining in the aqueous phase.
机译：添加外部碳源以创造厌氧条件来修复被硝基芳族化合物污染的土壤已成功应用于Dinoseb（2-仲丁基-3,4-二硝基-邻甲酚）污染的土壤，除草剂和2,4,6-三硝基甲苯（TNT）（炸药）。在厌氧阶段之后增加需氧阶段以去除过量的外部碳，产生的经处理土壤的需氧量比目前在厌氧阶段之后剩下的土壤要低。检查了使用乙酸盐，可溶性淀粉，葡萄糖和不溶性淀粉作为外部碳源，以产生和维持厌氧条件。在静态培养的土壤反应器中添加葡萄糖可以最大程度地降低氧化还原电位，并产生具有最低氧化还原电位（-400 mV）的培养物。优化了添加的葡萄糖量，从而使用了0.25％（w / v）的葡萄糖来处理被12000 mg TNT，3000 mg RDX（六氢-1,3,5-三硝基-1， 3,5-三嗪）和30 mg HMX（八氢-1,3,5,7-四硝基-1,3,5,7-四偶氮电影）/ kg土壤。在这些处理中，厌氧阶段在14天内完成，另外7天有氧阶段导致水相中残留的TOC浓度为30 mg / L。

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