Go Green: Graphene Filtration Systems

We could see growing INTEREST of companies to prevent pollution and to find new ways to protect environment. As a result, Selective filtration of water, liquid and oil became essential investment in many industries.

Oil-based companies are engaging the best scientists to run experiments with new methods of filtration. The focus is mainly on purifying wastewater, oil spill cleanups, oil fields, and more. Latest media attention, has been paid to an exciting application of graphene. In 2DM, we looked at our graphene to serve as an ultrathin membrane, filtering out contaminants to quickly purify high volumes of oil, water or artificial dye. Please check out more about our two recent experiments below. 

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Graphene For Filtration Of Oil

This first experiment shows oil-water filtration with a graphene membrane in comparison to a commercial 0.2 µm PTFE membrane. For this test we applied our premium quality graphene. 

Graphene filtration membrane

Graphene filtration membrane

Graphene filtration system for oil-water separation

Graphene filtration system for oil-water separation

This is how the two filtration systems looked like. The upper bottles contained oil-water mix. The both bottles had the same concentration of oil in the water. 

Oil-water separation through graphene filtration system (left) vs. commercial PTFE membrane (right)

Oil-water separation through graphene filtration system (left) vs. commercial PTFE membrane (right)

This last picture shows the test results. The bottle on the left side contains water separated from our oil-water mix that ran through the graphene membrane. The right one shows the separation through a commercial PTFE filtration membrane. Additionally, you can use the graphene membrane multiple times, what saves your resources. 


Graphene For Dye Filtration

In our second test, we used our premium quality graphene as a filtration membrane to remove artificial dye from soda. For this experiment we used soda (Fanta) and tried to remove tartrazine. 

Graphene membrane

Graphene membrane

Graphene filtration system (left) and PTFE filtration system (right)

Graphene filtration system (left) and PTFE filtration system (right)

To be able to easily compare the results, we similarly as in the first test, built 2 filtration systems. As you can see on the picture: a PTFE one and one with added graphene. 

 

The graphene filtration system catched all tartrazine into the membrane and separated clear soda without artificial dye. On the other side, the PTFE membrane couldn't separate artificial color. Moreover, after our experiment, we tested the same membrane over and over and you can use it multiple times as in the oil-water system. 

Graphene filtration system (left) and PTFE filtration system (right)

Graphene filtration system (left) and PTFE filtration system (right)

Soda after filtration through graphene filtration system (left) and PTFE filtration system (right)

Soda after filtration through graphene filtration system (left) and PTFE filtration system (right)

This filtration system has a wide industrial applications. Companies in several areas need to filter chemical additives from water or other liquids to protect environment and follow the government regulations. 


These systems have numerous potential practical applications as gas, water and oil filtration is one of the essential components for many companies. Follow us on social media or subscribe to our newsletter for the latest experiments.