• 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 >Reduction of trichloroethylene and nitrate by zero-valent iron with peat
【24h】

Reduction of trichloroethylene and nitrate by zero-valent iron with peat

机译：泥炭零价铁还原三氯乙烯和硝酸盐

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 feasibility of using zero-valent iron (ZVI) and peat mixture as in situ barriers for contaminated sediments and groundwater was investigated. Trichloroethylene (TCE) and nitrate (NO_3~-), redox sensitive contaminants were reduced by ZVI and peat soil mixture under anaerobic condition. Peat was used to support the sorption of TCE, microbial activity for biodegradation of TCE and denitrification while TCE and nitrate were reduced by ZVI. Decreases in TCE concentrations were mainly due to ZVI, while peat supported denitrifying microbes and further affected the sorption of TCE. Due to the competition of electrons, nitrate reduction was inhibited by TCE, while TCE reduction was not affected by nitrate. From the results of peat and sterilized peat, it can be concluded that peat was involved in both dechlorination and denitrification but biological reduction of TCE was negligible compared to that of nitrate. The results from hydrogen and methane gas analyses confirmed that hydrogen utilization by microbes and methanogenic process had occurred in the ZVI-peat system. Even though effect of the peat on TCE reduction were quantitatively small, ZVI and peat contributed to the removal of TCE and nitrate independently. The 16S rRNA analysis revealed that viable bacterial diversity was narrow and the most frequently observed genera were Bacillus and Staphylococcus spp.
机译：研究了使用零价铁（ZVI）和泥炭混合物作为被污染沉积物和地下水的原位屏障的可行性。 ZVI和泥炭土壤混合物在厌氧条件下减少了三氯乙烯（TCE）和硝酸盐（NO_3〜-）的氧化还原敏感性污染物。泥炭用于支持三氯乙烯的吸附，微生物活性以用于三氯乙烯的生物降解和反硝化，而六氯乙烯可降低三氯乙烯的三氯乙烯和硝酸盐。三氯乙烯的浓度降低主要归因于零添加物，而泥炭支撑了反硝化微生物并进一步影响了三氯乙烯的吸附。由于电子的竞争，TCE抑制了硝酸盐的还原，而TCT的还原不受硝酸盐的影响。从泥炭和灭菌泥炭的结果可以得出结论，泥炭既参与脱氯也参与反硝化作用，但是与硝酸盐相比，TCE的生物还原作用可以忽略不计。氢气和甲烷气体分析的结果证实，ZVI-豌豆系统中已发生微生物利用氢和甲烷化过程。尽管泥炭对降低TCE的影响在数量上很小，但ZVI和泥炭独立地有助于去除TCE和硝酸盐。 16S rRNA分析表明，可行的细菌多样性很窄，最常见的属是芽孢杆菌和葡萄球菌。

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