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首页> 外文学位 >Establishing a vegetative cap for sustainable stabilization of copper contaminated soils in Torch Lake, Michigan.
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Establishing a vegetative cap for sustainable stabilization of copper contaminated soils in Torch Lake, Michigan.

机译：在密歇根州的火炬湖建立一个植物冠以可持续稳定受铜污染的土壤。

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摘要

Extensive mining activities during the late 19th and early 20th centuries in the Upper Peninsula, Michigan have resulted in a number of contaminated sites with mine tailings. Several million metric tons of mine tailings were generated during the peak of copper (Cu) mining activities in this region. These tailings are called "stamp sands" because they were generated by crushing native Cu containing rocks, by a process known as stamping. The stamp sands were discharged into Lake Superior, other interior lakes and their shorelines, converting these areas into vast, fallow lands. The Cu contaminated stamp sands are being eroded back into the lakes, severely affecting the benthic community. The stamp sands are slightly alkaline in nature, have very low organic matter content and are highly deficient in nutrients, such as nitrogen, phosphorus and carbon. The Gay and Hubbell/Tamarack site stamp sand sites have about 50 and 19 times higher total Cu concentration compared to a normal agricultural soil, respectively. Biosolids collected from the local Portage Lake Water and Sewage Authority (PLWSA) and locally available compost was used as source of nutrients for the plants. The goal was to grow the oil seed crops camelina (Camelina sativa) and field pennycress (Thlaspi arvense) on these marginal lands, which can serve the dual purpose of producing feedstock for biofuels and reducing erosion of the Cu contaminated soils into the lakes. We conducted: i) laboratory incubation study to evaluate the geochemical fate of copper and soil nutrient profile in contaminated stamp sands with the addition of biosolids and compost amendments, ii) greenhouse column study to evaluate the effect of compost addition and plant cover (camelina, field pennycress) on the control of stamp sand erosion and fate and distribution of Cu, iii) field simulation study to evaluate the effect of plant cover (camelina, field pennycress) on control of stamp sand erosion and to evaluate the quality of biofuels from the biofuel feedstock (camelina, field pennycress) grown in stamp sands, and iv) door to door survey of the Torch Lake Township in Upper Peninsula of MI to get the opinions of local people about starting our project of reducing stamp sand erosion and biofuel feedstock production in the Torch Lake area. Results from this study will help in the (1) development of a novel technique for the establishment of a sustainable vegetative cap to prevent erosion of stamp sands into the Torch Lake which will serve as a model for the re-vegetation of other metal-impacted areas and (2) development of a novel biodiesel feedstock production system in marginal lands using oilseed crops, which is inexpensive, sustainable and regionally-appropriate.
机译：在19世纪末期和20世纪初，密歇根州上半岛的大量采矿活动导致许多受污染的矿山尾矿场。在该地区的铜（Cu）开采活动高峰期，产生了数百万吨的尾矿。这些尾矿之所以被称为“邮票砂”，是因为它们是通过将天然的含Cu岩石通过称为冲压的过程压碎而产生的。 stamp沙被排入苏必利尔湖，其他内部湖泊及其海岸线，将这些地区转变为广阔的休耕地。受到铜污染的邮票沙正被侵蚀回湖中，严重影响着底栖生物群落。印模砂本质上是弱碱性的，有机物含量非常低，并且营养素（例如氮，磷和碳）高度缺乏。与正常的农业土壤相比，盖伊和哈贝尔/塔玛拉克印模砂站点的总铜浓度分别高出约50倍和19倍。从当地的Portage湖水和污水管理局（PLWSA）收集的生物固体和当地可获得的堆肥被用作植物的营养来源。目标是在这些边缘土地上种植油料作物山茶花（Camelina sativa）和田间豆瓣菜（Thlaspi arvense），这可以达到生产生物燃料的目的，并减少被铜污染的土壤对湖泊的侵蚀。我们进行了以下项目：i）实验室孵化研究，通过添加生物固体和堆肥改良剂来评估受污染的印章沙中铜的地球化学命运和土壤养分状况； ii）温室柱研究以评估添加堆肥和植物覆盖物（山茶，田间竹ny）在控制of沙侵蚀和铜的命运和分布中的应用，iii）田间模拟研究，以评估植物覆盖物（山茶科，田pen竹）在控制stamp沙侵蚀和评价生物燃料质量方面的作用iv）在密歇根州上半岛的Torch Lake Township进行门到门调查，以征询当地民众对我们开始减少邮票沙土侵蚀和生物燃料原料生产项目的意见在火炬湖地区。这项研究的结果将有助于（1）开发一种新技术，以建立一种可持续的植物帽来防止印章砂侵蚀到Torch湖中，这将成为其他受金属影响的植物重新植被的模型（2）在廉价土地上开发一种新型的生物柴油原料生产系统，该系统使用油料作物，价格便宜，可持续且符合地区特点。

著录项

  • 作者

    Sidhu, Virinder Pal Singh.;

  • 作者单位

    Montclair State University.;

  • 授予单位 Montclair State University.;
  • 学科 Environmental management.
  • 学位 Ph.D.
  • 年度 2016
  • 页码 170 p.
  • 总页数 170
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 等离子体物理学;
  • 关键词

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