钛金属有机框架使用紫外线分解PFA
The crisis of PFAS contamination (sometimes publicly referred to as PFOA, PFOS or GenX contamination) of drinking water and its threat to public health will be the focus of a好莱坞主要电影coming this November. Exposure to PFAS can be harmful to humans, potentially resulting in kidney cancer, liver damage, and developmental problems in children. The substance can build up in humans and animals over years, elevating the risk.
PFA吸附剂和催化剂
PFAS或pfas或多氟烷基物质,美国食品药品监督管理局已经创造了什么‘Forever Chemicals’由于它们在人体中的持久性,由于其疏水链使材料可以将水推开并产生不粘涂层,因此在消费产品化学家中非常受欢迎。该物质可以在食品包装,烹饪设备和家具中找到。它在消防泡沫中也很常见,这导致了部署这些泡沫的水源污染。
尽管有收集PFA的方法,但计划如何处理污染物。化学工程师正在开发一些完全破坏收集到的PFA的方法,但是它们需要高能量密集型的异地工艺,或者需要将连接的吸收/PFAS材料掩埋为一种永久废物的新形式。对于前者,需要1000°C(〜1800°F)的温度,并且很少有用于收集化学物质的吸附剂可以在这种热量中存活。通过这两个过程,环境的成本仍然很高。
输入MOF:Metal Organic Frameworks, or MOFs for short, are crystalline 3D structures with incredible internal surface area which translates into an unbelievable ability to absorb molecules.A technique to cause defects in MOFs赖斯大学设计的已经表明,这些材料可以吸收工业标准的两倍,即活性炭。亚博网站下载2019年5月,framergy, Inc., the first MOF company, was funded to explore PFAS destruction by the US Environmental Protection Agency (EPA), under their Small Business Innovation Research (SBIR) program. The research, in partnership with Texas A&M University, explores how MOFs capture PFAS, and then subjects the MOF and guest PFAS molecules to ultra violet light.
Framergy科学家使用的是Arysorb™T125,这是一种与水稻科学家使用的UIO-66品种结构相似的钛MOF。Arysorb™T125基于MIL-125-NH2,该H2于2008年首次由Gerard Ferey和Christian Serre发现Centre national de la recherche scientifique(CNRS). In ARYSORB™ T125, titanium oxo clusters are periodically arranged and separated by organic linkers, which leads to a highly accessible and large surface area. The titanium nodes can then act upon the guest PFAS molecule as a photocatalyst, something not possible in UiO-66. This material is exclusively licensed to framergy, along with all other known titanium-based MOFs, by CNRS, and is available at commercial scale throughStrem.com和公司。
使用超紫色光(UV)的水溶液中的PFA进行破坏测试,结果表明,Arysorb™T125能够通过氟-19核磁共振降解污染物。在MOF存在下,PFOA和PFO的两种物种的进一步测试清楚地证明了可以捕获水传播的PFAS物种,并分解成较小的,较小的有害物质,并使用易于使用的紫外线。这是通过液相色谱质谱法证实的,并且是PFAS光催化的首次已知证明。
framergy is aggressively scaling the technology for commercialization through the EPA SBIR program at a time when PFAS are being addressed by the agency through“该机构有史以来最关注的化学物质的最全面的跨机构行动计划”, according to Director Andrew Wheeler. The next step will be to complete Phase I of the program and apply for a Phase II award. “EPA’s SBIR Program is pleased to support small businesses such as framergy that are working to bring their innovative ideas to the market to solve tough environmental issues such as treating PFAS in water.” stated April Richards, SBIR Program Manager at the EPA.
这一突破消除了PFA战争中的关键障碍。据公司首席运营官雷·奥兹德米尔(Ray Ozdemir)表示,“我们公司的钛金属有机框架已被证明不仅可以捕获水系统中的危险PFA,而且还可以将它们分解为在阳光下的生物利益较少。”该公司还使用材料来用于新颖的个人护理使用情况,例如阳光块和皮亚博网站下载肤上的污染物清除剂。