Anode Modification to Target Pb Removal for Drinking Water Purification using Inverted Capacitive Deionization

使用倒置电容去离子对阳极进行修饰以实现饮用水净化中的铅去除目标

• 批准号: 9345861
• 负责人: Lindsay Boehme
• 金额: $ 15.03万
• 依托单位: POWERTECH WATER, INC.
• 依托单位国家: 美国
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-15 至 2019-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9345861
• 关键词: Adopted; Adoption; Adsorption; Anodes; Applications Grants; Biological; Carbon; Cations; Cereals; Chemicals; Chemistry; Child; Coagulation Process; Complex; Copper; Corrosion; Development; Devices; Electrodes; Elements; Ensure; Excision; Goals; Hardness; Heavy Metals; Home environment; Ion Exchange; Ions; Iron; Kentucky; Lead; Lead Poisoning; Lead levels; Legal patent; Ligands; Maintenance; Measures; Medical; Metals; Methods; Michigan; Modification; Natural regeneration; Osmosis; Phase; Plumbing; Population; Precipitation; Process; Property; Research; Site; Sodium Chloride; Solid; Source; Specificity; Stream; Surface; System; Technology; Translating; United States Environmental Protection Agency; Universities; Water; Water Purification; Water Supply; base; blood lead; commercialization; contaminated drinking water; conventional therapy; cost; drinking water; effective therapy; feeding; hazard; improved; innovation; interest; novel; operation; research and development; toxic metal; voltage; water solution; water treatment

Project Summary/Abstract PowerTech Water (PTW) intends to demonstrate the use of inverted capacitive deionzation (i-CDI) technology to target the removal of heavy metals, lead (Pb) in particular, from drinking water. Heavy metals such as lead and copper can enter the water distribution system due to corrosion of pipes and fittings, contaminating drinking water. The US Environmental Protection Agency (EPA) established The Lead and Copper Rule in 1991 to limit exposure of these elements and set action levels to 0.015 ppm (15 ppb) and 1.3 ppm for lead and copper, respectively. The water crisis that occurred in Flint, Michigan, last year is an unfortunate case that shows how important it is to ensure lead is below the action level in drinking water. Point-of-use (POU) solutions for lead removal include chemical precipitation, coagulation, ion-exchange, and reverse osmosis (RO), all of which have arduous regeneration steps and/or require costly maintenance to replace materials. PTW's solution offers a low-cost, low-maintenance, reversible adsorption technology that can target metals removal. More specifically, using unique surface chemistries to impart selectivity to the carbon anode, metals can reversibly adsorb and desorb from solution using PTW's patented i-CDI process that provides stability and pH control during operation. The specific aims of this Phase I grant application include: 1. Demonstrating functionalization of carbon-based anodes with soft base ligands to induce specificity for metals adsorption. 2. Determining the minimum metal concentration, in tap water, allowed to maintain an adsorption selectivity >50% over non-metal, divalent ions.

项目总结/摘要 PowerTech Water（PTW）打算展示使用反向电容去离子（i-CDI）技术， 目标是去除饮用水中的重金属，特别是铅。重金属如铅和 由于管道和配件的腐蚀，铜可能进入供水系统，污染饮用水。 美国环境保护署（EPA）于1991年制定了铅和铜规则，以限制 这些元素，并设定行动水平为0.015 ppm（15 ppb）的铅和铜分别为1.3 ppm。水 去年发生在密歇根州弗林特的危机是一个不幸的案例，表明确保铅的重要性 低于饮用水中的行动水平。 用于除铅的使用点（POU）解决方案包括化学沉淀、混凝、离子交换和反渗透。 渗透（RO），所有这些都具有艰苦的再生步骤和/或需要昂贵的维护以更换材料。 PTW的解决方案提供了一种低成本、低维护、可逆的吸附技术，可以去除金属。 更具体地，使用独特的表面化学来赋予碳阳极选择性，金属可以可逆地 使用PTW的专利i-CDI工艺从溶液中吸附和解吸， 操作 第一阶段拨款申请的具体目的包括： 1.展示了具有软碱配体的碳基阳极的官能化以诱导对生物活性的特异性。 金属吸附 2.确定自来水中允许保持吸附选择性的最小金属浓度 超过非金属二价离子的50%。