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Ash cleans the water

07.01.2015

An interesting use for the ash left from smoked cigarettes came up with researchers from the Institute of Plasma Physics of the Academy of Sciences of the People's Republic of China, led by Li Jiaxing. Taking advantage of the fact that the ashes are very porous, they decided to prepare a sorbent from it to remove arsenic from drinking water. Scientists collected the contents of institute ashtrays, separated carbon from soluble salts and used it as a template to create an openwork structure - they covered it with a layer of aluminum oxide.

Water brought from the province of Inner Mongolia was passed through the resulting material, with an arsenic concentration of 233 µg/l. At the exit, the water turned out to be the purest - there was only 8 μg / l of arsenic in it, which is less than it should be according to the WHO standard. The sorbent showed itself best of all, where the weight of aluminum oxide was twice that of carbon, and the consumption of the sorbent was 4-8 grams per liter.

According to the authors of the work, the ashes can be easily collected in specially designated smoking areas and in this way turn waste into something useful with minimal resources. Water treatment systems operate in large cities, and in small villages it will be possible to clean water with such ash filters.

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Renesas RX130 microcontrollers with touch control support 14.12.2015

Renesas Electronics has announced the release of the RX32 family of 130-bit touch-enabled microcontrollers. The areas of their application are household appliances, building automation, industrial automation, portable medical devices.

According to the manufacturer, RX130 microcontrollers make it possible to implement the actual control functions and user interface with the help of a single microcontroller.

Support for capacitive sensors allows the use of touch buttons made of various materials, which can be very useful in environments where the use of traditional buttons for some reason is not possible. In industrial electronics, gloved input recognition may be required, and in the case of home appliances, designers have more freedom of expression to make devices look attractive.

Up to 64 touch buttons can be detected depending on the model and mode. At the same time, no more than 10% of the CPU computing resource is spent on actually working with sensors, so RX130 microcontrollers are suitable for quite demanding applications. Other advantages of the RX130 include low power consumption.

Introductory samples of the RX130 are available now. Serial deliveries should begin in March 2016.

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