高效的水消毒方法取代常规过程

Researchers from卡迪夫大学要求使用氢气和空气立即进行的水消毒剂比常规商业方法更高度效力和病毒。

The researchers note that their results could completely transform present-day water disinfection technologies. It also offers an exceptional opportunity to provide clean water to communities in need. The results have been published in the journalNature Catalysis.

新设计的方法使用由钯和金制成的催化剂吸收氧气和氢以形成过氧化氢。过氧化氢广泛用作消毒剂，目前在工业规模生产。

工厂每年生产超过400万吨过氧化氢，然后运输到使用的位置并储存。为了防止在储存和运输过程中降解，通常在生产过程中稳定化学品。然而，这些化学品影响其作为消毒剂的有效性。

添加氯是消毒水的另一种常规方法。但是氯与天然存在的化合物在水中反应，以形成对人类毒性的化合物，更高剂量。

Hydrogen peroxide produced instantaneously at the operating site overcomes both safety and efficacy issues — both associated with commercial techniques used at present. The researchers tested the disinfection potential of the newly developed method against commercially available hydrogen peroxide and chlorine.

The ability of the disinfectant to act againstEscherichia coliunder the same conditions was tested, subsequently followed by an analysis to identify the processes by which the bacteria were killed using each method.

他们证明，用于将过氧化氢的催化剂从氢和氧中合成，导致生产许多高反应性化合物，称为反应性氧（ROS）。研究人员表明，ROS负责抗病毒和抗菌作用，而不是过氧化氢本身。

The catalyst-based method was found to be 10,000,000 times more potent at destroying the bacteria than an equivalent amount of the industrial hydrogen peroxide. It was more than 100,000,000 times more effective compared to chlorination, under the same conditions.

基于催化剂的方法在短时间内杀死病毒和细菌，而不是其他两种化合物。根据估计，大约7.85亿人缺乏进入水和27亿人经历了每年至少一个月的水资源稀缺。

Around 2.4 billion people worldwide face inadequate sanitation, leading to deadly diarrheal diseases, such as typhoid fever, cholera, and other water-borne illnesses.

The significantly enhanced bactericidal and virucidal activities achieved when reacting hydrogen and oxygen using our catalyst, rather than using commercial hydrogen peroxide or chlorination shows the potential for revolutionizing water disinfection technologies around the world.

Graham Hutchings，Chanciff Catexics Institute的学习协作和纪录教授

“我们现在已经证明了一步process where, besides the catalyst, inputs of contaminated water and electricity are the only requirements to attain disinfection,” added Prof. Hutchings.

“Crucially, this process presents the opportunity to rapidly disinfect water over timescales in which conventional methods are ineffective, whilst also preventing the formation of hazardous compounds and biofilms, which can help bacteria and viruses to thrive。“Graham Hutchings，Chanciff催化研究所的学习协作和纪录教授。

Journal Reference:

理查兹，T.，等. (2021) A residue-free approach to water disinfection using catalytic in situ generation of reactive oxygen species.Nature Catalysis.doi.org/10.1038/s41929-021-00642-021-00642-021-00642-0.021-00642-0..

来源：https://www.cardiff.ac.uk.