Sorption of Organic Contaminants from Water by Environmental Solids: Additivity of Contributions In Heterogeneous Systems

9910174球本项目的目标是加深对地表水和地下水有机污染物在木炭、页岩和沙子等物质上的吸收和吸附方式的了解。水处理实践中使用的工艺通常取决于在处理过程中使用或产生的物质的吸附和吸收特性。在他获得国家科学基金会总统青年研究员奖(9196241)的相关研究中，这位研究员研究了土壤对两种合成有机土壤污染物(三氯苯和三氯乙烯)的吸附特性。所研究的土壤来自共同的母岩，但受自然分解产物和水分入渗的影响，土壤有机质含量不同。在这个项目中，调查者计划增加土壤污染物的数量，包括氯苯、两种二氯苯、氯仿、四氯化碳、林丹和敌草隆。这些化合物在辛醇-水分配比和水中的溶解度上有足够大的差异，这项工作的结果可以用于评估Polanyi理论在预测土壤吸附行为方面的潜在有用性。这项研究的结果可用于校准数学模型，这些模型预测受自然分解过程和淋溶作用影响的土壤有机污染物扩散特性的过程的性能。这一知识有望导致更好的工程设计和环境技术的使用，而不是目前用于净化土壤的过程和系统，以减少或消除污染物对地下水质量的污染影响，并防止污染物从受污染的地点移动。***

9910174 Ball The objective of this project is to obtain an improved understanding of the manner in which organic contaminants of surface and groundwater are absorbed and adsorbed on substances such as charcoal, shale and sand. Processes used in water treatment practice frequently depend on adsorptive and absorptive characteristics of substances used or produced during the treatment process. In related prior research supported by his Presidential Young Investigator award from the National Science Foundation (9196241) the investigator studied sorptive properties of soils toward two synthetic organic soil contaminants (triochlorobenzene and trichloroethene). Soils studied emerged from a common parent rock but differed in their content of soil organic matter as influenced by differences in natural decomposition products and infiltration of water. In this project the investigator plans to increase the number of soil contaminants to include chlorobenze, two dichlorobenzenes, chloroform, carbon tetrachloride, lindane and diuron. These compounds differ sufficiently significantly enough in their octanol-water distribution ratios and aqueous solubility for results of this work to be used in evaluating the Polanyi theory's potential usefulness in predicting sorptive behavior of soil. Results of this research may be applied to calibration of mathematical models that predict the performance of processes affecting the dispersive properties of organic contaminants of soil as affected by natural decomposition processes and leaching. This knowledge is expected to lead toward better engineering design and use of environmental technologies than is now possible for processes and systems to decontaminate soil to reduce or eliminate the pollutional influence of contaminants on the quality of grounewater and prevent movement of contaminants from contaminated sites. ***