FUNDAMENTAL STUDIES OF THERMAL DECONTAMINATION OF SOILS

土壤热净化基础研究

• 批准号: 6271032
• 负责人: JACK B HOWARD
• 金额: $ 17.74万
• 依托单位: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-04-01 至 1999-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6271032
• 关键词: adsorption; carbon tetrachloride; carbopolycyclic compound; chlorobenzenes; detoxification; environmental toxicology; gas chromatography; hazardous substances; heat; interferometry; mutagen testing; mutagens; soil; soil pollution; thermogravimetry; thermostability; toluene; toxicant interaction; trichloroethylene; waste treatment

Description: The specific aims of the project include the broad, long- term objective to provide new scientific and engineering understanding for safely applying thermal treatment to soil decontamination. The investigators will seek to identify those details of commercially realizable treatment schedules that do (and do not) give rise to rapid and efficient destruction or removal of organic and metallic contaminants without causing unacceptable public health impacts. The project has three specific aims. Specific aim 1 is directed at a study of how normal treatment conditions and upset conditions affect the rates of removal/destruction of targeted contaminants and yields, identities, production rates, and human cell mutagenicity of toxic by-products. Specific aim 2 is to determine if pretreatment of soil with low cost additives can be combined with controlled thermal treatment to isolate metals or heteroatoms in solid matrices or as chemical compounds. The investigators will determine if these isolated species are suited for separation, storage, and\or reprocessing. Specific aim 3 involves modeling of health impacts of soil thermal desorption and utilizes data bases and kinetics obtained for specific aims 1 and 2. The research will test the hypotheses that: 1) existing commercial thermal treatment can decontaminate soils without generating mutagenic by-products that could contribute to adverse public health impacts; 2) there are alternate thermal treatment schedules that provide attractive removal efficiencies but could generate toxic by-products; 3) thermal reactions of soil and soil decomposition products can significantly affect soil decontamination behavior; and 4) treating agents can bind metals and heteroatoms into solid matrices.

描述：该项目的具体目标包括广泛的、长期的- 学期目标提供新的科学和工程理解 用于安全地将热处理应用于土壤去污。这个 调查人员将寻求查明这些商业上的细节 有(和没有)引起快速反应的可实现的治疗计划 有效地销毁或移除有机和金属 不会对公众健康造成不可接受的影响。这个 该项目有三个具体目标。 具体目标1是针对正常治疗条件的研究 和颠覆条件影响目标的移除/销毁速度 污染物和产量、身份、生产率和人体细胞 有毒副产物的致突变性。 具体目标2是确定是否以低成本对土壤进行预处理 添加剂可以与受控热处理相结合来分离 固体基质或化合物中的金属或杂原子。这个 调查人员将确定这些孤立的物种是否适合 分离、储存和/或再加工。 具体目标3涉及模拟土壤热对健康的影响 解吸和利用获得的特定的数据库和动力学 目标1和2。 这项研究将检验以下假设：1)现有的商业 热处理可以在不产生诱变性的情况下净化土壤 可能对公共卫生造成不利影响的副产品；2) 有其他的热处理时间表，可以提供有吸引力的 去除效率高，但可能产生有毒副产品；3)热 土壤和土壤分解产物的反应可以显著 影响土壤去污行为；以及4)处理剂可以结合 金属和杂原子形成固体基质。