LT: Selective Alum Recovery and Simultaneous Solid Wastes Reduction in Large Water Treatment Plants

LT：大型水处理厂的选择性明矾回收和同时减少固体废物

• 批准号: 9814265
• 负责人: Arup Sengupta
• 金额: $ 5.5万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814265&HistoricalAwards=false
• 关键词: LT; Selective; Alum; Recovery; Simultaneous

9814265 Sengupta The objective of this research is to understand the mechanisms which allow selective Al(III) recovery by composite ion exchange (CIX) materials while rejecting dissolved organic matter, manganese, heavy metals, arsenic and others. Further, to utilize the understanding of these mechanisms to optimize the CIX properties for enhanced separation and recovery of alum from water treatment sludges. Alum, or aluminum sulfate, is the most widely used coagulant in treatment of drinking water in the U.S. and is a major component (25-50%) of the two million tons of water treatment sludge solids disposed of daily. The successful recovery and reuse of this material would not only reduce the demand for this resource, but more significantly would reduce the quantity of sludges to be disposed of while costs and environmental scrutiny increase. Recent studies have demonstrated the prospect of selectively recovering metal precipitates from the complex background of sludge or slurry using a new type of CIX. The thin-sheet morphology of the CIX makes it compatible with the sludge medium while the functional groups offer high aluminum selectivity. This grant is made pursuant to the joint NSF/Lucent Technologies Industrial Ecology Research Fellowships Program 1998.

9814265 Sengupta本研究的目的是了解通过复合离子交换（CIX）材料进行选择性Al（III）回收的机制，同时拒绝溶解的有机物、锰、重金属、砷等。 此外，利用对这些机制的理解来优化CIX性能，以增强从水处理污泥中分离和回收明矾。 明矾或硫酸铝是美国饮用水处理中最广泛使用的凝结剂，并且是每天处置的200万吨水处理污泥固体的主要组分（25-50%）。 这种材料的成功回收和再利用不仅会减少对这种资源的需求，而且更重要的是会减少在成本和环境审查增加的情况下需要处理的污泥数量。 近年来的研究表明，利用新型CIX从复杂背景的污泥或料浆中选择性回收金属沉淀具有前景。 CIX的薄片形态使其与污泥介质相容，而官能团提供高铝选择性。这项资助是根据1998年NSF/朗讯科技工业生态学研究奖学金计划联合提供的。