• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Phytoremediation systems for treatment of contaminant mixtures in soil.
【24h】

Phytoremediation systems for treatment of contaminant mixtures in soil.

机译：植物修复系统，用于处理土壤中的污染物混合物。

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

Plant-based remediation techniques that can address mixtures of heavy metals and organic contaminants in soil warrant investigation due to their cost effectiveness and public acceptability. The potential of phytoremediation to remediate mixtures of heavy metals and hydrocarbons in soil is presented in two papers. A hydropic screening of twenty-seven forage grasses, grown in a solution containing 100 muM Zn, 5 muM Cu and 1 muM Cd, provided six species that were exceptionally metal tolerant. These six species were examined for their growth response and root phenolic secretion at five levels of hydroponic heavy metal contamination. Phenolic secretion, an indicator of a plant's capacity to promote polycyclic aromatic hydrocarbon (PAH) degradation, increased with heavy metal contamination, however, the values were low (30 mug/g root). Two high biomass producing, metal-tolerant grasses, Bromus riparius and Arrhenatherum elatius, were combined with M2Rhizo4, a strain of plant growth-promoting rhizobacteria. The plant-bacterial combinations were established in artificial and genuine soils contaminated with heavy metals and PAHs at a range of concentrations. In contaminant-free artificial soil, inoculation promoted B. riparius growth by 25% compared to non-inoculated plants. In artificial soil, contaminated with 495 mg/kg Zn, 263 mg/kg Cu and 23 mg/kg Cd, M2Rhizo4 promoted B. riparius growth by 22%. In chromated-copper-arsenate (CCA) and creosote contaminated soil, M2Rhizo4 inoculated A. elatius had 15% more biomass and greater survival rates than non-inoculated A. elatius. A phytoremediation system composed of metal-tolerant plants inoculated with hydrocarbon-degrading or plant growth promoting bacteria may be suitable for sites contaminated with a mixtures of hydrocarbons and heavy metals.
机译：基于植物的修复技术可解决土壤中重金属和有机污染物的混合物，因此具有成本效益和公众接受度，因此值得研究。两篇论文介绍了植物修复对土壤中重金属和碳氢化合物混合物进行修复的潜力。在包含100μMZn，5μMCu和1μMCd的溶液中生长的27种草料的水培筛选提供了6种对金属极耐的种。在五个水培重金属污染水平下，检查了这六个物种的生长响应和根部酚类分泌物。酚类物质的分泌是植物促进多环芳烃（PAH）降解的能力的指标，随重金属污染的增加而增加，但是该值很低（<30杯/克根）。将两种高生物量产生金属耐受性的草（Bromus riparius和Arrhenatherum elatius）与促进植物生长的根瘤菌M2Rhizo4结合。植物-细菌组合是在人工和纯正的土壤中建立的，这些土壤在一定浓度范围内被重金属和多环芳烃污染。在无污染的人造土壤中，与未接种的植物相比，接种可促进河曲菌的生长25％。在受495 mg / kg锌，263 mg / kg铜和23 mg / kg镉污染的人造土壤中，M2Rhizo4促进了河豚曲霉的生长22％。在铬酸铜砷酸盐（CCA）和杂酚油污染的土壤中，接种M2Rhizo4的拟南芥比未接种的拟南芥具有15％的生物量和更高的存活率。由耐金属的植物组成的植物修复系统接种了降解碳氢化合物或促进植物生长的细菌，可能适用于碳氢化合物和重金属混合物污染的场所。

著录项

  • 作者

    Duxbury, Patrick H.;

  • 作者单位

    McGill University (Canada).;

  • 授予单位 McGill University (Canada).;
  • 学科 Engineering Agricultural.; Engineering Environmental.; Agriculture Soil Science.
  • 学位 M.Sc.
  • 年度 2000
  • 页码 92 p.
  • 总页数 92
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农业工程;环境污染及其防治;土壤学;
  • 关键词

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