ENVIRONMENTAL HEALTH ASPECTS OF COAL FLY ASH UTILIZATION AS A MEDIUM FOR PLANTS

这个子项目是许多利用资源的研究子项目之一 由NIH/NCRR资助的中心拨款提供。子项目的主要支持 而子项目的主要调查员可能是由其他来源提供的， 包括其它NIH来源。 列出的子项目总成本可能 代表子项目使用的中心基础设施的估计数量， 而不是由NCRR赠款提供给子项目或子项目工作人员的直接资金。 该项目的重点是煤燃烧残留物，粉煤灰（FA），含有大量的重金属的环境友好利用的问题。迄今为止，关于FA作为植物生长培养基组分的潜在用途的知识 是支离破碎的。此外，在粉煤灰填埋场上提供植物覆盖的FA利用对环境的影响以及其处置的未解决问题的重要性相对较少受到关注。本研究项目将通过FA/土壤淋溶实验与实验室和温室实验相结合，测试植物物种/品种在生长环境中对FA的反应。 申请人将测试北达科他州粉煤灰可以安全地用作植物生长介质的组分而不损害环境健康的总体假设。申请人将尝试确定适应的植物物种/品种 我们会研究这些植物累积潜在有毒重金属的程度。从而减少燃煤粉煤灰堆对环境健康的危害。该项目的长期目标是研究粉煤灰（FA）作为植物生长介质的潜在用途。本项目的具体目标如下：1.确定由FA和土壤组成的不同生长介质的环境安全性; 2.研究FA/土壤复合培养液中不同FA含量（高达100% FA）对植物萌发、生长及吸收重金属、硼（B）和硒（Se）的影响。评估大多数抗性物种的品种对生长培养基中高浓度FA的抗性。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. This project is focused on the problems of environmentally friendly utilization of coal combustion residue, fly ash (FA), containing significant amounts of heavy metals. To date, knowledge about the potential use of FA as a component of growth media for plants is fragmentary. Furthermore, the environmental impact of FA utilization in providing a plant cover over the coal fly ash landfills and the importance of the unsolved problem of its disposal had attracted relatively little attention. This research project will be performed trough the combination of FA/soil leaching experiments with laboratory and greenhouse experiments testing plant species/varieties response to FA in the growth environment. The applicant will test the overall hypothesis that North Dakota fly ash can be safely used as a component of growing media for plants, without compromising environmental health. The applicant will attempt to identify plant species/varieties that are adapted to such condition and we will determine the level of accumulation of potentially toxic heavy metals by these plants. It should lead to diminishing of environmental health endangerment of coal FA piles. The long-term goal of this project is to study the potential use of fly ash (FA) as the medium for growing plants. The Specific Aims of this project are as follows: 1. To determine the environmental safety of different growth media composed of FA and soil; 2. To study the influence of various FA content in FA/soil composed media (up to 100% of FA) on the germination, growth, and uptake of heavy metals, boron (B), and selenium (Se) by the plants; 3. To assess the resistance to high concentrations of FA in growth medium among the varieties of most resistant species.