SBIR Phase I: Removal of Contaminants from Soil Using an Enhanced Phytoextraction Process

SBIR 第一阶段：使用增强的植物提取工艺去除土壤中的污染物

• 批准号: 9760703
• 负责人: Dalibor Hodko
• 金额: $ 10万
• 依托单位: Lynntech, Inc
• 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: 1998-01-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9760703&HistoricalAwards=false
• 关键词: SBIR; Phase; Removal; Contaminants; Soil

*** 9760703 Hodko This Small Business Innovation Research Phase I project describes the development of an innovative approach for decontamination of soils and wastes polluted by heavy metals. Heavy metal contamination presents one of the most intractable problems for soil clean-up. Present technology relies mostly upon ex situ metal extraction or in situ contaminant immobilization processes, which are expensive and which remove all biological activity in the soil during the soil treatment. Recently, the use of metal-accumulating plants was explored for the removal of metals from contaminated soils. This new phytoremediation technology utilizes specially selected or engineered metal accumulating plants or plants native to metalliferous soils with a capacity to bioaccumulate metals to concentrations greater than 2% in the aerial plant dry matter. However, the use of this technology is limited to superficially-contaminated soils, which is determined by the plant root length and plant suction potential. Lynntech, Inc. proposes a development of an innovative approach to phytoremediation, which will significantly enhance the process of phytoextraction and extend its application to soils with deep subsurface contamination. The approach involves a process which allows an upward, counter-gravitational transport of contaminants, water, as well as nutrients through the soil matrix to the rhizosphere. Once the contaminants are transported to the rhizosphere they will be extracted by contaminant-accumulating plants which can concentrate contaminants from the soil into the harvestable parts of roots and above-ground shoots. Potential Commercial Applications of the Research: The development of this technology, if shown to be successful, will have a large potential commercial applications: (i) in remediation of mixed waste polluted soils (heavy metals, organics and radionuclides); (ii) in agriculture for remediation of sewage sludge amended soils and for removal of pesticides and other toxins fr om the rhizosphere zone, and (iii) as an innovative practice for nutrient and moisture transport and containment in dry soils. ***

*** 9760703 Hodko 这个小型企业创新研究第一阶段项目描述了一种创新方法的开发，用于净化受重金属污染的土壤和废物。 重金属污染是土壤清理中最棘手的问题之一。 目前的技术主要依赖于异位金属提取或原位污染物固定工艺，这些工艺昂贵并且在土壤处理过程中消除了土壤中的所有生物活性。 最近，人们探索使用蓄积金属的植物来去除受污染土壤中的金属。 这种新的植物修复技术利用专门选择或设计的金属积累植物或原产于含金属土壤的植物，能够将金属生物积累到气生植物干物质中的浓度大于 2%。 然而，该技术的使用仅限于表面污染的土壤，这是由植物根长和植物吸力潜力决定的。 Lynntech, Inc. 提出开发一种创新的植物修复方法，该方法将显着增强植物提取过程，并将其应用范围扩展到深层地下污染的土壤。 该方法涉及一个过程，允许污染物、水和养分通过土壤基质向上、反重力输送到根际。 一旦污染物被运输到根际，它们将被污染物积累植物提取，这些植物可以将土壤中的污染物浓缩到根和地上芽的可收获部分中。 研究的潜在商业应用：如果这项技术的开发成功，将具有巨大的潜在商业应用：（i）修复混合废物污染的土壤（重金属、有机物和放射性核素）； (ii) 在农业中用于修复污水污泥改良土壤并去除根际区域的农药和其他毒素，以及 (iii) 作为干燥土壤中养分和水分运输和遏制的创新实践。 ***