Can these innovative sponges help reduce microplastic pollution in our oceans?
Scientists in China have made a breakthrough in the fight against microplastic pollution by creating natural sponges capable of absorbing nanoplastics. These experimental sponges, made from starch and gelatin, have the potential to significantly reduce plastic pollution entering our oceans.
The lightweight sponges have porous structures that can trap both microplastics and nanoplastic particles, which are less than one micron in size. Microplastic pollution has become a global concern, with its presence detected in various environments, including the deepest parts of the ocean and even in the air we breathe.
The researchers from the College of Food Science and Engineering in Qingdao tested their invention in different matrices, such as seawater, tap water, soil surfactant, and even soup from take-out lunches. The results were promising, with the sponges successfully removing around 90% of micro and nanoplastic particles.
One potential application for these sponges is in washing machines, where synthetic clothing fibers shed during the rinse cycle contribute to microplastic pollution. By adding a few sponges to each load of laundry, a significant portion of these fibers could be absorbed.
While the sponges currently contain formaldehyde in their production process, the researchers are working to find an environmentally friendly alternative. Once a substitute is found, these biodegradable sponges could be widely used in manufacturing and laundry applications, helping to mitigate microplastic pollution.
