Nano-scale Mechanisms of Metal(loid) Rhizostabilization in Desert Mine Tailings

沙漠尾矿中金属(类)根系稳定的纳米机制

基本信息

  • 批准号:
    7993085
  • 负责人:
  • 金额:
    $ 29.71万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2009
  • 资助国家:
    美国
  • 起止时间:
    2009-01-08 至 2012-11-30
  • 项目状态:
    已结题

项目摘要

DESCRIPTION (provided by applicant): Metalliferous mine tailings in arid regions pose a significant health risk to proximal populations because they are prone to wind-borne dispersion and water erosion. The problems are extensive and persistent as impacted sites lack normal soil stabilization. Phytostabilization is the revegetation of mine tailings to ameliorate these issues with the goal of root zone metal accumulation to avoid metals from entering the food chain through above-ground biomass. The role of plant roots and microbes in promoting mineral dissolution-precipitation reactions and associated metal sequestration is an active area of research, but little is known about reaction trajectories and changes in particle-scale metal speciation of plant-tailings systems, owing largely to their geochemical heterogeneity and microbial complexity. Since the form or speciation of a metal controls its bioavailability and toxicity, research that probes coupling between metal speciation and microbial dynamics in response to phytostabilization is needed. The overarching goal of the proposed work is to identify multi-scale process-links between biological structure and contaminant geochemistry during phytostabilization of mine tailings. The four Specific Aims are: (i) to deduce the dependence of metal(loid) molecular environment on particle-specific weathering processes; (ii) to assess the spatial correlations between biogenic (and geogenic) weathering products and specific microbial cells and biofilms; (iii) to relate these direct observations of solid phase biogeochemistry with time- and depth-resolved measurements of tailings pore waters (focusing on the mobility and bioavailability of metal contaminants); and (iv) to measure the influence of solid and solution phase dynamics [(i) through (iii)] on the evolution of tailings microbiology and geochemistry both in the rhizosphere and in the bulk tailings over the course of phytostabilization. Embedded within these objectives is the additional goal of statistically integrating the nano- to macro-scale "geo" and "bio" information gained to better understand the phytostabilization process and possible outcomes in terms of exposure and toxicity risks associated with tailings sites in arid environments. Biostabilization will be probed over a 27 month mesocosm experiment using an array of advanced tools that can interrogate the complex associations of roots, microbes, minerals and metals at high spatial resolution. A time series of bulk and micro-focused X-ray spectroscopic, molecular biology/microbial ecology, and aqueous geochemical data will be generated for analysis of coupled processes that control the local contaminant environment. To assess how these process-links affect the larger goal of metal stabilization, we will coordinate our "bio" and "geo" observations so that they probe identical locations, together traversing molecular to macroscopic (mesocosm-level) scales. This research is both timely and necessary as growth in the US Southwest is exploding and communities are being developed in closer proximity to such tailings sites.
描述(由申请人提供): 干旱地区的金属矿尾矿对邻近人口构成重大健康风险,因为它们容易受到风的传播和水的侵蚀。这些问题是广泛和持久的,因为受影响的地点缺乏正常的土壤稳定。植物稳定化是对尾矿进行重新植被,以改善这些问题,目的是在根区积累金属,避免金属通过地上生物量进入食物链。植物根和微生物在促进矿物溶解-沉淀反应和相关金属螯合中的作用是一个活跃的研究领域,但对植物尾矿系统的反应轨迹和颗粒尺度金属形态的变化知之甚少,这主要是由于其地球化学异质性和微生物的复杂性。由于金属的形态或形态控制其生物利用度和毒性,因此需要研究金属形态和微生物动力学之间的耦合以响应植物稳定化。 拟议的工作的总体目标是确定多尺度的过程中的生物结构和污染物地球化学的尾矿植物稳定化之间的联系。四个具体目标是:(i)推断金属(类)分子环境对颗粒特定风化过程的依赖性;(ii)评估生物成因的(和地质)风化产物和特定的微生物细胞和生物膜;(iii)将固相地球化学的这些直接观测与尾矿孔隙沃茨的时间和深度分辨测量相关联(重点是金属污染物的流动性和生物利用度);以及(iv)测量固相和溶液相动力学的影响[(i)至(iii)]在植物稳定过程中,根际和大量尾矿中尾矿微生物学和地球化学的演变。在这些目标中,还有一个目标,即在统计上整合所获得的纳米到宏观尺度的"地理"和"生物"信息,以更好地了解植物稳定化过程以及与干旱环境中尾矿场相关的接触和毒性风险方面的可能结果。生物稳定将在27个月的围隔实验中使用一系列先进的工具进行探索,这些工具可以在高空间分辨率下询问根,微生物,矿物质和金属的复杂关系。将生成大量和微聚焦X射线光谱、分子生物学/微生物生态学和含水地球化学数据的时间序列,用于分析控制当地污染物环境的耦合过程。为了评估这些过程链接如何影响金属稳定化的更大目标,我们将协调我们的“生物”和“地理”观测,使它们探测相同的位置,一起穿越分子到宏观(中观层次)尺度。这项研究是及时和必要的,因为美国西南部的增长正在爆炸式增长,社区正在靠近这些尾矿场发展。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Jon D Chorover其他文献

Jon D Chorover的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Jon D Chorover', 18)}}的其他基金

Nano-scale Mechanisms of Metal(loid) Rhizostabilization in Desert Mine Tailings
沙漠尾矿中金属(类)根系稳定的纳米机制
  • 批准号:
    7573098
  • 财政年份:
    2009
  • 资助金额:
    $ 29.71万
  • 项目类别:
Environmental Controls on Bioavailability of Arsenic and Toxic Metals
对砷和有毒金属生物利用度的环境控制
  • 批准号:
    10337263
  • 财政年份:
    1997
  • 资助金额:
    $ 29.71万
  • 项目类别:
Environmental Controls on Bioavailability of Arsenic and Toxic Metals
对砷和有毒金属生物利用度的环境控制
  • 批准号:
    10558769
  • 财政年份:
    1997
  • 资助金额:
    $ 29.71万
  • 项目类别:

相似国自然基金

湍流和化学交互作用对H2-Air-H2O微混燃烧中NO生成的影响研究
  • 批准号:
    51976048
  • 批准年份:
    2019
  • 资助金额:
    61.0 万元
  • 项目类别:
    面上项目

相似海外基金

Development of acceptor materials for the large-area air-stable Organic Solar Cell with low energy loss
低能量损失大面积空气稳定有机太阳能电池受体材料的开发
  • 批准号:
    23K04913
  • 财政年份:
    2023
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Air pollution and the health effects in South Asia: Comparison between urban and rural area and assessment of prevention with mask
南亚空气污染与健康影响:城乡比较及口罩预防评估
  • 批准号:
    18K10059
  • 财政年份:
    2018
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Evaluation of the mercury pollution and elution risk of mercury in air, water and soil from bauxite mining area
铝土矿矿区空气、水和土壤中汞污染及汞洗脱风险评价
  • 批准号:
    18K18207
  • 财政年份:
    2018
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Prediction of minimum air temperature in the next morning in the sloping area and internet delivery of the prediction result
坡地次日清晨最低气温预测及预测结果网络发布
  • 批准号:
    26450343
  • 财政年份:
    2014
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Natural Fluid Transport Systems Limited: A novel “Microcomb” heat exchange module comprising a matrix of microtube air passageways designed to dramatically increase primary heat rejection surface area efficiency, and as a consequence provide significant i
Natural Fluid Transport Systems Limited:一种新颖的“微梳”热交换模块,包含微管空气通道矩阵,旨在显着提高主要散热表面积效率,从而提供显着的热交换效率。
  • 批准号:
    710501
  • 财政年份:
    2014
  • 资助金额:
    $ 29.71万
  • 项目类别:
    GRD Proof of Concept
Development of interfacial area transport model of two-phase flow for improvement of ship drag reduction technology based on air lubrication method
基于空气润滑法改进船舶减阻技术的两相流界面区域输运模型的建立
  • 批准号:
    26289331
  • 财政年份:
    2014
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development and application of fast and large-area MEMS optical calorimeter at picowatt resolution in air at room temperature
室温空气中皮瓦分辨率快速大面积MEMS光学量热仪的研制与应用
  • 批准号:
    26420407
  • 财政年份:
    2014
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Study on Optimal Air Traffic Control in Terminal Area using Topology Concept
基于拓扑概念的航站区空中交通优化控制研究
  • 批准号:
    25630388
  • 财政年份:
    2013
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Study on Emission Control Area for Reducing Air Pollution From Shipping
减少船舶大气污染的排放控制区研究
  • 批准号:
    24710052
  • 财政年份:
    2012
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Development of a method to estimate the traffic characteristic values for air pollution substance estimation in the Metropolitan area in East Asia
东亚都市区空气污染物质估算交通特征值估算方法的开发
  • 批准号:
    24510216
  • 财政年份:
    2012
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了