 This study examined the regeneration performance of reduced graphite oxide, RGO, filter materials when subjected to water cleaning. It found that water cleaning was most effective at a 20 liters per second per square meter, l slash s done to water flow velocity and a 17 second cleaning time. After four cleanings, the filtration efficiency of particulate matter, PM 0.3 to 2.5 microns dropped by 32.4 percent. However, the filtration efficiency of PM 1.0 microns increased by 24.5 percent. Additionally, the filtration efficiency of PM 2.5 microns dropped by 17.6 percent after four cleanings. The study also found that water cleaning did not affect the filtration efficiency of particles larger than 2.5 microns. Furthermore, RGO filter materials can be water washed twice and still retain 90 percent of their original cleanliness. This article was authored by Min Yang, Bing Yang, XIN Zhang, and others. We are article.tv, links in the description below.