Reduction of Chromium(VI) by Dissolved and Particulate-BoundNatural Organic Matter

通过溶解和颗粒结合的天然有机物质减少六价铬

• 批准号: 8918091
• 负责人: Alan Stone
• 金额: $ 15.69万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8918091&HistoricalAwards=false
• 关键词: Reduction; Chromium; VI; Dissolved; Particulate

This is an award to support research on the interactions of chromium species in water solution with reducing substances. Principal focus of this project is on reducing effects of naturally occurring, organic compounds. The research will also consider effects of hydrogen-ion concentration, dissolved oxygen, iron, manganese and other naturally occurring reductive substances. The goal of this project is to understand and predict changes in chromium speciation and mobility in aquatic environments. Project objectives include determination of reaction rates and mechanisms for reduction of chromates by low-molecular weight reducing substances for guidance in subsequent work with natural organic compounds that may be found in soils and in surface water sediments that have been contaminated by chromium compounds. Chromium compounds are used industrially, for the tanning of leather, metal finishing, pulp and wood processing. A better understanding than now exists for the processes that affect transformations of chromium in the environment and which affect its mobility in groundwater are likely to be applied in engineering design of systems for management of chromium-containing wastes and to deal with the contamination of groundwater from existing deposits of chromium wastes.

该奖项旨在支持水溶液中铬物质与还原物质相互作用的研究。 该项目的主要重点是减少天然有机化合物的影响。 该研究还将考虑氢离子浓度、溶解氧、铁、锰和其他天然还原物质的影响。 该项目的目标是了解和预测水生环境中铬形态和迁移性的变化。 项目目标包括确定低分子量还原物质还原铬酸盐的反应速率和机制，以指导后续处理可能存在于被铬化合物污染的土壤和地表水沉积物中的天然有机化合物。 铬化合物在工业上用于皮革鞣制、金属表面处理、纸浆和木材加工。对影响环境中铬的转化和影响其在地下水中的流动性的过程有了比现在更好的了解，可能会应用于含铬废物管理系统的工程设计，并处理现有铬废物沉积物对地下水的污染。