Phytofiltration of Arsenic-Contaminated Drinking Water

砷污染饮用水的植物过滤

• 批准号: 6549820
• 负责人: MARK P ELLESS
• 金额: $ 36.21万
• 依托单位: EDENSPACE SYSTEMS CORPORATION
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-03 至 2004-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6549820
• 关键词: acidity /alkalinity; arsenic; biotechnology; biotransformation; detoxification; environmental toxicology; plant ecology; plants; technology /technique development; water quality; water supply; water treatment

DESCRIPTION (provided by applicant): Arsenic contamination of drinking water poses significant health risks to millions of people worldwide. Current technologies used to clean arsenic-contaminated water have significant drawbacks, such as high cost and generation of large volumes of toxic waste. Edenspace Systems Corporation proposes to create the basis for a cost-effective phytofiltration technology using a recently identified arsenic hyperaccumulating fern to remove arsenic from drinking water to concentrations below regulatory limits. Phase I research demonstrates that the fern can rapidly reduce arsenic concentrations in a variety of source waters, achieving levels less than the new USEPA drinking water limit of 10 mug/L. Phase II research will further explore the fern's arsenic removal capability by varying such important water treatment factors as arsenic valences, water pH, dissolved minerals including iron, sulfur, sodium and calcium compounds, chlorination/fluoridation, intensity and spectrum of light, and fern size and root density. The work will culminate in a continuous process demonstration conducted in collaboration with the City of Albuquerque, New Mexico and Virginia Department of Health. The anticipated results of this research may provide the foundation for development of a solar-powered (photosynthetic) hydroponic technique that enables cost-effective, small-scale cleanup of arsenic-contaminated drinking water.

描述（由申请人提供）：饮用水的砷污染对全世界数百万人构成重大健康风险。目前用于净化砷污染水的技术具有显着的缺点，例如成本高和产生大量有毒废物。 Edenspace Systems Corporation 提议使用最近发现的砷超富集蕨类植物来建立具有成本效益的植物过滤技术的基础，以将饮用水中的砷去除至低于监管限值的浓度。第一阶段的研究表明，蕨类植物可以迅速降低各种水源水中的砷浓度，使其浓度低于美国环保署新的饮用水限值 10 杯/升。第二阶段研究将通过改变砷价、水 pH 值、溶解矿物质（包括铁、硫、钠和钙化合物）、氯化/氟化、光的强度和光谱以及蕨类植物的大小等重要的水处理因素，进一步探索蕨类植物的除砷能力和根密度。这项工作将在与新墨西哥州阿尔伯克基市和弗吉尼亚州卫生部合作进行的连续过程演示中达到高潮。这项研究的预期结果可能为开发太阳能（光合作用）水培技术奠定基础，该技术能够以经济高效的方式小规模净化受砷污染的饮用水。