An Evaluation of the Leachability of Heavy Metals from Fly Ash Liner Materials

粉煤灰衬里材料中重金属浸出率的评估

• 批准号: 8908201
• 负责人: Charles Shackelford
• 金额: $ 7.42万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8908201&HistoricalAwards=false
• 关键词: Evaluation; Leachability; Heavy; Metals; Fly

The objective of the research is to conduct laboratory experiments that will provide data on the effects of flow rate, cation exchange capacity, and permeant fluid characteristics on the leachability of heavy metals from fly ash liner materials. The laboratory tests will be conducted on fly ash in various combinations with cement, bentonite, and/or two well- characterized soils. Flow rates ranging from those expected to be operative under field conditions will be used in the experiments. The characteristics of the permeant fluids will range from tap water to a synthetic electrolyte solution varying in both concentration and composition. The concentrations and amounts of specific chemical species being leached from fly ash mixtures will be monitored to draw conclusions about the effect of cation exchange capacity, and the effect of electrolyte solution on the leachability of heavy metals. As a result of the research, a more valid assessment of the use of fly ash in waste impoundment facilities will be possible. Such an assessment will have far reaching technical and economical implications, especially for the electric power industry.

研究的目的是进行实验室 实验将提供关于流速影响的数据， 阳离子交换容量和渗透流体特性 粉煤灰衬里材料中重金属的可吸收性。 实验室试验将在不同的粉煤灰中进行 与水泥、膨润土和/或两个井的组合， 特征土壤。 流速范围从预期的 将在现场条件下使用， 实验 渗透流体的特性将从自来水 水到合成电解质溶液， 浓度和组成。 的浓度和数量 从飞灰混合物中浸出的特定化学物质 将进行监测，以得出关于阳离子影响的结论 交换容量，以及电解质溶液对交换容量的影响。 重金属的可吸收性。 根据研究结果，A 更有效地评估在废物蓄水中使用粉煤灰 设施将是可能的。 这样的评估将有很大的意义。 达到技术和经济影响，特别是对 电力工业。