RECOVERY OF TOXIC HEAVY METALS FROM CONTAMINATED WATER SUPPLIES USING PLANTS

使用工厂从受污染的供水中回收有毒重金属

• 批准号: 3734117
• 负责人: JORGE L GARDEA-TORRESDA
• 金额: --
• 依托单位: UNIVERSITY OF TEXAS EL PASO
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3734117
• 关键词: atomic absorption spectrometry; cadmium; chemical binding; chromium; copper; electrochemistry; electron microscopy; environmental toxicology; heavy metals; lead; luminescence; mercury; metal poisoning; nuclear magnetic resonance spectroscopy; physical separation; plants; polarography; water pollution; water pollution control; water supply

Accumulation of toxic heavy metal ions in water supplies is a matter of increasing health concern. Metal ions such as lead, copper, cadmium, mercury, chromium, and nickel cause acute and chronic illnesses in humans and other animals. At the present time, development of low cost and highly effective methods for the removal of toxic heavy metal ions from waters is of great health importance. We propose to study the metal binding properties of biologically-derived materials that are currently present in large quantities in the southwestern part of the united Stats. Some of the biological materials selected grow around smelters and in the heavy metal- rich tailings of abandoned mines, areas where few other plants will survive. Thus, these plants may be biologically adapted to bind metal ions. Four concurrent areas of research will be active. 1) Study of the toxic heavy metal ion binding properties of Russian thistle (Salsola species). Larrea divaricata (creosote bush), and Sphagnum peat moss. 2). Use of spectroscopic and electrochemical techniques as well as chemical modification methods to investigate the mechanism of metal ion binding to the biomaterial. 3) Study of silica-based and alginate-based cell immobilization techniques in order to use the biomaterial in columns under flow conditions. 4). Examine the possibility of purifying local water supplies contaminated with heavy metal ions by using the immobilized biological materials. The long term goal of this research is to understand the mechanisms of toxic metal ion binding to the biological materials and consequently, this understanding will enable the optimization of toxic metal removal from contaminated waters using biologically derived materials. Thus, the proposed research has a direct relevance upon environmental health.

供水中有毒重金属离子的积累是一个问题 日益增加的健康关注。 金属离子如铅、铜、镉、 汞、铬和镍会导致人类急性和慢性疾病 和其他动物。 目前，正在开发低成本、高性价比的产品。 去除水中有毒重金属离子的有效方法是 对健康具有重要意义。 我们建议研究金属结合 目前存在于生物材料中的生物材料的特性 美国西南部大量存在。 一些 选择的生物材料在冶炼厂周围和重金属中生长 废弃矿山的丰富尾矿，很少有其他工厂可以利用的区域 存活。 因此，这些植物可能在生物学上适合结合金属 离子。 四个并行研究领域将活跃起来。 1）研究 俄罗斯蓟（Salsola）的有毒重金属离子结合特性 物种）。 Larrea divaricata（杂酚油灌木）和泥炭藓。 2）。 使用光谱和电化学技术以及化学技术 修饰方法研究金属离子结合的机制 生物材料。 3）二氧化硅基和海藻酸盐基细胞的研究 固定技术，以便在柱中使用生物材料 流动条件。 4). 检查净化当地水的可能性 使用固定化物处理被重金属离子污染的物资 生物材料。 这项研究的长期目标是了解 有毒金属离子与生物材料结合的机制和 因此，这种理解将有助于优化有毒物质 使用生物衍生技术从受污染的水中去除金属 材料。 因此，拟议的研究与 环境健康。