EFFECT OF AGING OF POLLUTANTS FOR SOIL ON BIOAVAILABILITY

土壤污染物老化对生物利用度的影响

• 批准号: 6271218
• 负责人: MARTIN ALEXANDER
• 金额: $ 13.29万
• 依托单位: CORNELL UNIVERSITY
• 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/6271218
• 关键词: alkanes; benzene; biotransformation; biphenyl compounds; environmental contamination; environmental toxicology; ground water; hazardous substances; industrial waste; microorganism; mutagen testing; naphthalenes; nonwater solvent; phenanthrene; polystyrenes; soil pollution; toluene; water pollution

During the prolonged period that many organic pollutants react in soil, they appear to become sequestered and their behavior changes. This sequestration or aging affects their susceptibility to biodegradation, extractability, and toxicity. However, the means presently do not exist to predict the extent of change in bioavailability with time for any organic compound. Hence, a study is proposed (1) to determine the properties of organic compounds and of soils that govern how aging-in soil affects bioavailability in terms of extractability, biodegradability, and toxicity; and (2) to establish the feasibility of using biodegradation and extraction methods to predict toxicity of organic compounds in soil. Plant (seed germination, root elongation), microbial (nitrification, Ames Salmonella mutant reversion), and invertebrate (acute toxicity to Eisenia foetida) toxicity tests will be employed as a suite applicable to soil-borne hazardous wastes. In addition, studies will be conducted on the mechanisms by which aging occurs, with attention to both porous and non-porous media (synthetic and natural), soil properties, and pore size, tortuosity, and distribution. Emphasis will be on some 25 14C-labeled compounds for which property- outcomes relationships and shifts in known rate and extent of biodegradability may be related to measures of toxicity and sequestration.

在许多有机污染物在土壤中发生反应的长时间内，