affordable water purification using silver nanoparticles - carbon filter air purifier

A team led by IIT
Professor Madras has invented a cheap and effective way to produce clean drinking water.
It will soon be possible to produce 10 liters of water
No bacteria or viruses. at just Rs. 10-
12 per month for the daily consumption of a family of five. Prof. T.
Pradeep of IIT chemistry department-
M and his team used silver nanoparticles to achieve this feat.
In addition to the reasonable price, silver nanoparticles coated on the composite do not require electricity or water pressure to produce drinking water.
They can range from 5-in ambient temperature-
According to a paper published in the Journal of the National Academy of Sciences in May 7, the temperature is 35 degrees Celsius.
The production of nanoparticles matrix is also the environment-friendly.
The technology is based on the continuous release of 50 per billion (ppb)
Silver ions in large amounts of water kill microorganisms.
The amount of silver ions released is far below the maximum allowable limit of 100 ppb.
It is well known that silver ions have the ability to destroy cell membrane integrity and DNA.
Professor, in order to achieve the continuous release of silver ions
Pradeep's team first prepared aluminum-oxygen composite
The hydroxide of silver nanoparticles is deposited.
50 nm per box (nm)long and 20-30 nm wide.
The box is connected through bio-
Polymer enhancement, professor
Pradeep told Hinduism.
Each box has two sides open to allow water to flow through.
"However, not every box is coated with nanoparticles," he said . ".
The composite with silver nanoparticles exists in the form of sand particles.
"There will be millions of nanoboxes of composite particles, many of which will be embedded in silver nanoparticles," he said . ".
The reason for the continuous release is that silver nanoparticles are more active than bulk silver and therefore less stable.
Instability is caused by the combination of less atoms.
Nanoparticles are trapped in composites, making them "less contact" with reagents that tend to form scales, but still have enough "interaction" with water to continuously release silver ions.
Nevertheless, after a period of time, the scale was formed on the nanoparticles, and the performance decreased.
But reactivate (
Release of silver ions)
The composite can be heated to 70-
3-100 degrees Celsius4 hours.
"Consumers can use the filter for one year before it is reactivated.
It can run six cycles (six years),” Prof. Pradeep said.
The use of carbon filters in the second phase helps to remove traces of particulate matter, organic and bacterial biomass, and silver ions.
The tests show that the composite made of specific materials can remove pollutants such as iron, lead and arsenic.
In the case of arsenic, 20 gm composites kept in 400 liters of water reduced the chemical content from 1 per million (ppm)
Less than 10 ppb in the output water.