As someone engaged in water research, it’s difficult to break records when there’s already news of an Indian startup producing water from thin air or an Australian team modifying a metal that can clean water super quickly. But that’s exactly what researchers at the University of Buffalo did when they tested out their innovative device that uses sunlight and black carbon-dipped paper to purify water — its nearly 100% efficiency rate appears record-breaking indeed.
“Our technique is able to produce drinking water at a faster pace than is theoretically calculated under natural sunlight,” said lead researcher Qiaoqiang Gan in a statement . . . “Usually, when solar energy is used to evaporate water, some of the energy is wasted as heat is lost to the surrounding environment . . . Our system has a way of drawing heat in from the surrounding environment, allowing us to achieve near-perfect efficiency.”
The sloping carbon-dipped paper is crucial to the device’s efficiency. The bottom edges of the water purifier soaks up water while its outer coating absorbs solar energy to facilitate evaporation. This makes way for the purification process. The structure seems simple enough. And according to the scientists, incredibly accessible too.
According to them as well, what set their device apart from those of other groups that try to develop a water purifier with solar tech is that they didn’t prioritize finding advanced materials such as carbon-based nanomaterials and other expensive metals. Instead, the researchers wanted to focus on creating something that was extremely low-cost yet efficient.
This is consistent with their ultimate goal, which is to make the water purifier device useful to regions that need it the most, including disaster-stricken areas. To achieve it, the researchers also made their own startup called Sunny Clean Water.
“When you talk to government officials or nonprofits working in disaster zones, they want to know: ‘How much water can you generate every day?’ We have a strategy to boost daily performance,” said Haomin Song, an electrical engineering PhD graduate, in a statement. “With a solar still the size of a mini fridge, we estimate that we can generate 10 to 20 liters of clean water every single day.”
I always knew writers like me could use our medium to promote causes like sustainability, water conservation, and the like. But who knew paper could literally purify water, especially at this speed and efficiency?