It is obviously a daunting challenge to provide clean drinking water in resource-poor areas. However, the research teams of the US Army and the University of Rochester have already proposed a novel solution. It is characterized by the use of a specially designed aluminum plate to achieve efficient water purification through solar energy. Given that solar energy itself can eliminate aquatic pathogens and can provide power for low-cost water purifiers, this solution is quite feasible.
(From: University of Rochester)
In recent years, many research teams have demonstrated low-cost/portable water purification technology. However, the new plan based on special aluminum plates and solar energy proposed by the US Army and the University of Rochester is expected to raise water purification technology to a new level of efficiency.
It is reported that the research team started with a conventional aluminum plate and processed ultra-short femtosecond laser pulses to produce a deep black slotted surface.
This allows the material to have high absorption and "super-wicking" properties. Even if the aluminum plate is not completely submerged in water, it can resist a certain amount of gravity and draw a layer of water from the storage tank along the metal surface.
In this process, the black material can efficiently absorb and use solar energy to heat, and the etched wicking surface structure can then change the molecular bonds of water, thereby improving the efficiency of the evaporation process to remove contaminants.
Chunlei Guo, a professor of optics at the University of Rochester, said: "The synergy of the three, the technology's operating efficiency is better than ideal, is expected to provide a simple, long-lasting and inexpensive solution to the global water crisis, especially in developing countries. new plan".
Through testing, the research team found that the panel can be used for water sources containing typical pollutants such as detergents, dyes, urine, heavy metals, and glycerin. The purified effect has reached a level that can be safely consumed.
In addition, due to the use of slotted surfaces, the device is relatively easy to clean and re-deploy at any time, and the panel is continuously adjusted to face the sun to achieve the best efficiency.
Details of this research have been published in the recently published Nature Sustainability journal.
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