Professor Donglei Phan and her team from the University of Texas have developed an unusual passive water purifier based on the well-known "solar distillation" technology. To do this, Fan used polypyrrole polymer, a radical black substance engineered to maximize absorption of solar energy and heat. The development team was able to adapt it to evaporate harmful impurities from water, creating a device in the form of a rose.
Donglei Fan admits she was inspired by the book "Black Tulip". Scattered sheets of paper impregnated with polypyrrole showed low heat values, so she folded them into a single structure in the form of a rosebud. Now that sunlight, which was still reflected from one section of the paper, fell on another. In addition, the heating area - and, accordingly, the evaporation - per unit volume of the structure has multiplied.
It remains to bring water through a tube in the form of a stalk of a man-made rose, place it in a sealed transparent vessel and ensure the drainage of condensate. The experimental cleaner showed performance at the level of 1.9 liters of liquid from 1 sq. M. area per hour. Almost all bacteria, heavy metals dissolved in water, other impurities precipitated and remained on the paper surface. Including salt from sea water - the "black rose" can become a new desalinator for the world of the future.
At the same time, the technology is very cheap, the cost of making one "rose" is no more than $ 0.02. In case of severe pollution, they turn into disposable devices, but dirty, waste paper from the evaporator can also be burned to obtain a source of heat or energy in areas of environmental disasters ... Although distilled water does not automatically turn into drinking water, such technologies are still incredibly useful.