• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Coupling bio/phytoremediation with switchgrass to biofuel feedstock production in mixed-contaminant soils.
【24h】

Coupling bio/phytoremediation with switchgrass to biofuel feedstock production in mixed-contaminant soils.

机译：将生物/植物修复与柳枝to耦合到混合污染土壤中的生物燃料原料生产。

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

Soil contamination with anthropogenic chemicals is a worldwide concern. The situation is complicated further by the presence of mixtures of chemicals at most contaminated sites. Potential exists for deploying bio/phytoremediation strategies with warm season perennial grasses (WSPGs) to ameliorate mixed contaminant (MC) soils with simultaneous production of bioenergy feedstocks. This study investigated the use of vermicompost (VC) and mycorrhizae - Glomus etunicatum (Ge) and Scutellospora heterogama (Sh), respectively, to enhance biomass productivities of model bioenergy feedstock switchgrass (SG) in MC soils. Designated portions of soils were contaminated with mixture of 50 mg˙kg--1 Cr and coal fly ash (10% FA (w/w)) representing inorganic contaminants, and with the nursery insecticide, bifenthrin (10 mg˙kg--1), representing an organic contaminant. After eight weeks of growth in moisture replacement soil microcosms (MRS), biomass productivity of switchgrass was not significantly inhibited by the presence of mixed contaminants in soil. The SG yield was enhanced slightly, but not significantly, by the application of VC amendment, mycorrhizal inoculation, or both to the MC soil (0.98 to 1.14, compared to unamended-MC soil, 0.96g). There was a significant decrease in Cr in the switchgrass rhizosphere with Ge inoculation alone, by combination of Ge inoculation and VC amendment, and by combination of Sh inoculation and VC amendment (64.4, 65.5, and 57.1 mg˙kg--1, respectively, compared to the initial Cr concentration in the MC soil, 76.67 mg˙kg --1). Accumulation of Cr in SG roots was significantly higher than Cr accumulation in SG shoots for all treatments. Roots of SG grown with VC amendment or AMF inoculation in MC soil contained less Cr than those grown in unamended MC soil. The above observation suggests the potential of VC and AMF in phytostabilization of Cr, and the importance of phytostabilization in the fate of Cr. Results also showed that between 41 and 50% of initially added bifenthrin to the MC soil had dissipated after eight weeks. This suggested strongly, the importance of bioremediation in the fate of bifenthrin in soil. Overall, the study shows that SG and associated rhizosphere microbial communities have the potential to bio/phytoremediate mixed contaminant soil and simultaneously produce biomass for biofuel feedstock.
机译：人为化学物质对土壤的污染已成为世界关注的问题。在大多数受污染的地点，由于化学品混合物的存在，使情况更加复杂。存在利用暖季多年生草（WSPG）部署生物/植物修复策略来改善混合污染物（MC）土壤并同时生产生物能源原料的潜力。这项研究分别调查了com堆肥（VC）和菌根-广mus香（Ge）和异枝S（Shcutellospora heterogama（Sh））在MC土壤中提高模型生物能源原料柳枝（（SG）的生物量生产力。指定部分的土壤被50 mg·kg--1 Cr和代表无机污染物的粉煤灰（10％FA（w / w））的混合物污染，并被苗圃杀虫剂联苯菊酯（10 mg·kg--1）污染。 ），代表有机污染物。在水分替代土壤微观世界（MRS）中生长了八周之后，柳枝biomass的生物量生产力并未受到土壤中混合污染物的明显抑制。通过在MC土壤上施用VC改良剂，菌根接种或同时对MC土壤施用SG，产量略有提高，但没有显着提高（与未经改良的MC土壤0.96g相比，0.98至1.14）。仅Ge接种，Ge接种和VC改良剂结合以及Sh接种和VC改良剂结合，柳枝rh根际的Cr显着降低（分别为64.4、65.5和57.1 mg·kg--1，与MC土壤中的初始Cr浓度相比为76.67 mg·kg -1）。在所有处理中，SG根中Cr的积累均显着高于SG芽中的Cr积累。在MC土壤中添加VC或AMF接种后生长的SG根所含的Cr比未改良MC土壤中生长的SG少。上述观察表明，VC和AMF在Cr的植物稳定中具有潜力，并且在Cr的命运中植物稳定的重要性。结果还显示，八周后，最初添加至联苯菊酯土壤中的联苯菊酯有41％至50％消散。这强烈表明了生物修复对联苯菊酯在土壤中的命运的重要性。总体而言，研究表明，SG和相关的根际微生物群落具有生物/植物修复混合污染土壤并同时生产生物燃料原料的潜力。

著录项

  • 作者

    Ogunmayowa, Oluwatosin Thompson.;

  • 作者单位

    Tennessee State University.;

  • 授予单位 Tennessee State University.;
  • 学科 Soil sciences.;Microbiology.;Environmental science.
  • 学位 M.S.
  • 年度 2015
  • 页码 124 p.
  • 总页数 124
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 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