FUNDAMENTAL STUDIES OF THERMAL DECONTAMINATION OF SOILS

土壤热净化基础研究

• 批准号: 5211107
• 负责人: JACK B HOWARD
• 金额: --
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/5211107
• 关键词: adsorption; carbon tetrachloride; carbopolycyclic compound; chlorobenzenes; detoxification; environmental toxicology; gas chromatography; 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.

说明：该项目的具体目标包括广泛的、长期的、 学期目标提供新科学和工程理解 用于安全地将热处理应用于土壤净化。的 调查人员将寻求确定这些商业细节， 可实现的治疗方案，确实（和不）引起快速 和有效的破坏或去除有机物和金属 污染物，不会对公众健康造成不可接受的影响。的 该项目有三个具体目标。 具体目标1旨在研究正常治疗条件如何 和干扰条件影响目标的移除/破坏速率， 污染物和产量，身份，生产率和人类细胞 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 添加剂可以与受控的热处理相结合， 固体基质中的金属或杂原子或化合物。的 研究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涉及土壤热环境对健康影响的建模 解吸，并利用数据库和动力学获得的具体 目标1和2。 该研究将检验以下假设：1）现有的商业 热处理可以净化土壤而不产生诱变 可能对公共卫生产生不利影响的副产品; 2） 存在提供有吸引力的热处理方案的替代热处理方案 去除效率高，但可能产生有毒副产物; 3）热 土壤和土壤分解产物的反应可以显着 影响土壤净化行为; 4）处理剂可以结合 金属和杂原子进入固体基质。