Novel Zeolite Photocatalyst for Reductive Dechlorination of Chlorinated VOCs

用于氯化 VOC 还原脱氯的新型沸石光催化剂

基本信息

批准号：
7404665
负责人：
Susan Gail MacKay
金额：
$ 10.24万
依托单位：
ZEOMATRIX, LLC
依托单位国家：
美国
项目类别：
财政年份：
2008
资助国家：
美国
起止时间：
2008-06-15 至 2009-09-14
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/7404665
关键词：
Address Adipose tissue Adsorption Affect Area Arts Businesses Carbon Catalysis Characteristics Chlorinated Hydrocarbons Chloroform Compatible Condition Cost Analysis Custom Data Department of Defense Department of Energy Deposition Developed Countries Development Drug Formulations Electrons Engineering Environment Ethylene Frequencies Goals Health Human Ion Exchange Ionic Strengths Kinetics Knowledge Laboratories Left Light Link Malignant Neoplasms Marketing Metals Methodology Methods Molds Molecular Nature Numbers Odors Oxidants Oxidation-Reduction Performance Phase Phase II Clinical Trials Pilot Projects Probability Production Property Protocols documentation Range Reaction Research Resistance Resources Sampling Screening procedure Site Solar Energy Solvents Speed Statistical Methods Structure Surveys System Technology Testing Tetrachloroethylene Toxic effect Trichloroethanes Trichloroethylene United States United States Environmental Protection Agency Visible Radiation Water Water Supply Zeolites absorption aluminosilicate aqueous base carbon compound catalyst commercialization cost cost effective dechlorination design high throughput screening improved innovation instrumentation landfill metal oxide molecular sieving novel pollutant programs prototype remediation research and development research study scale up success technological innovation trend ultraviolet water quality

项目摘要

DESCRIPTION (provided by applicant): Zeomatrix, a small business, is proposing to research and develop a remediation technology for chlorinated volatile organic carbons (CVOCs). CVOCs are ubiquitous groundwater pollutants. Left on their own they persist in nature for over 100 years. Most are toxic to humans, and some (including trichloroethylene) have been linked to cancer. A recently completed 17 year study by the United States Geological Survey found that chlorinated VOCs are present in nearly every aquifer in the United States. It is estimated that full scale remediation of these compounds in groundwater will cost in excess of $200 billion. The product being developed is a visible light photocatalyst which will promote the rapid reduction of CVOC compounds to less toxic materials. Current commercial photocatalysts are employed as oxidative catalysts, and thus they are less efficient at remediation in the presence of dissolved organic matter, a common component of groundwater. Zeomatrix utilizes high throughput screening methods to rapidly and cost effectively develop new photocatalysts. The Phase I research will be performed using custom-designed parallel photocatalyst screening instrumentation in order to evaluate a large number of candidate materials and identify the optimal reductive photocatalyst. The research will be focused on the following specific aims: one, to synthesize an array of catalyst support geometries based on design of experiments (DoE) protocol and using an automated deposition system custom-engineered by Zeomatrix to deposit various metal/metal oxide combinations and then screen for reductive photocatalytic activity under visible light; and, two, to screen the reductive photocatalysts selected from the initial screening experiments for activity versus chosen test compounds (trichloroethylene, trichloroethane), under a range of experimental conditions (pH, ionic strength, dissolve organic content). Selection of the optimal photocatalyst will be based on rapid degradation kinetics (turn over frequency), and efficacy under adverse conditions (high ionic strength, pH extremes, and high dissolved organic content). The results of the Phase I research will be used to determine the feasibility of applying the selected photocatalyst for the remediation of CVOCs. Phase II studies would be performed to further optimize the photocatalyst, and to perform a large scale pilot study on actual polluted groundwater. The combination of rapid kinetics with the use of low cost visible light would make this an attractive remediation option to address the extensive problem of CVOC contamination. The goal of this research is the development of a novel remediation technology for the break down of chlorinated volatile organic carbons in water. Chlorinated volatile organic carbons are found in nearly every aquifer in the US. Left on their own they persist in nature for over 100 years. Most are toxic to humans, and they accumulate in fatty tissue making them a danger to human health even at low levels. Some have been linked to cancer and over twenty are currently regulated in public water supplies by the United States Environmental Protection Agency.

描述（由申请人提供）：小型企业Zeomatrix正在建议研究和开发用于氯化挥发性有机碳（CVOC）的补救技术。 CVOC是无处不在的地下水污染物。他们独自留下来，他们在自然界中持续了100多年。大多数对人有毒，有些（包括三氯乙烯）与癌症有关。美国地质调查局最近完成的17年研究发现，美国几乎每个含水层都存在氯化VOC。据估计，在地下水中对这些化合物的全面修复将超过2000亿美元。所开发的产品是可见光的光催化剂，它将促进CVOC化合物快速降低毒性材料。当前的商业光催化剂被用作氧化催化剂，因此在存在溶解有机物的存在的情况下，它们在补救效率较低，这是地下水的常见成分。 Zeomatrix利用高吞吐量筛选方法快速地开发新的光催化剂。 I期研究将使用定制设计的平行光催化剂筛选仪器进行，以评估大量候选材料并确定最佳还原性光催化剂。这项研究将集中在以下特定目的上：一个，以基于实验设计（DOE）协议合成一系列催化剂支持几何形状，并使用由Zeomatrix定制的自动沉积系统沉积各种金属/金属氧化物组合，然后筛选出可见光下的还原性光催化活性的筛选；以及两个，在一系列实验条件下（离子强度，溶解有机物含量），从初始筛选实验中选择了活性与选择的测试化合物（三氯乙烯，三氯乙烷）的还原光催化剂。最佳光催化剂的选择将基于快速降解动力学（翻转频率），在不利条件下（高离子强度，极端pH值和高溶解有机含量）的功效。 I期研究的结果将用于确定应用选定的光催化剂用于修复CVOC的可行性。将进行II期研究以进一步优化光催化剂，并对实际污染的地下水进行大规模的试点研究。快速动力学与使用低成本可见光的结合将使这种有吸引力的补救选择，以解决CVOC污染的广泛问题。这项研究的目的是开发一种新型的补救技术，以破坏水中的氯化挥发性有机碳。在美国几乎每个含水层中都发现了氯化挥发性有机碳。他们独自留下来，他们在自然界中持续了100多年。大多数人对人有毒，它们在脂肪组织中积累，即使在低水平下，它们也会对人类健康有害。一些与癌症有关，目前由美国环境保护署在公共供水中受到监管。