{"id":33144,"date":"2015-08-28T13:48:00","date_gmt":"2015-08-28T13:48:00","guid":{"rendered":""},"modified":"2020-11-02T13:00:47","modified_gmt":"2020-11-02T13:00:47","slug":"8144-texas-teenager-creates-us-2-water-purifier-to-tackle-toxic-e-waste-pollution","status":"publish","type":"post","link":"https:\/\/dialogue.earth\/en\/pollution\/8144-texas-teenager-creates-us-2-water-purifier-to-tackle-toxic-e-waste-pollution\/","title":{"rendered":"Texas teenager creates US$20 water purifier to tackle toxic e-waste pollution"},"content":{"rendered":"

Consumer electronics, including computers and mobiles, are leaving a legacy of toxic waste in countries including China and India. Recycling factories across Asia are recovering e-waste\u00a0exported from around the world<\/a>, but discharging heavy metals and chemicals into local water supplies in the process.<\/p>\n

How to safeguard drinking water for local residents is an ongoing battle, with existing\u00a0solutions<\/a>\u00a0such as chlorination, distillation, boiling and high-tech filtration prohibitively expensive and often reliant on fossil fuels.<\/p>\n

Now a new filtering device, invented by a US teenager, could provide a cheap and easy way to purify water.<\/p>\n

The renewable heavy metal filter, designed by 18-year-old Perry Alagappan, removes 99% of heavy metals<\/a> from water that passes through it. The filter, built from graphene nanotubes, can be rinsed with a vinegar concentrate and reused. The highly concentrated waste can then be evaporated, leaving a deposit of pure metal that can be used in many different applications.<\/p>\n

Alagappan, who was awarded the Stockholm Junior Water Prize at this year\u2019s\u00a0World Water Week<\/a>, said the filter cost just US$20 (127 yuan) to make, up to five times less than existing reverse osmosis technology.<\/p>\n

\u201cI became interested in water purification when I visited my grandparents in India, and saw with my own eyes how electronic waste severely contaminated the environment,\u201d said the recent high school graduate from Houston, Texas, on winning the prize.<\/p>\n

It\u2019s common for water technologies to be\u00a0subject to patent applications and granted patents<\/a>. Alagappan, however, won\u2019t be patenting his groundbreaking water cleaning technology, but sharing it with the world.<\/p>\n

\u201cThe interest is more for science\u2019s sake,\u201d he said. \u201cIt needs to be available to everyone, rather than locked up. If you keep ideas that could unlock a lot of potential then you block progress. It\u2019s when people from a lot of countries come together that you can move forward.\u201d<\/p>\n

The teenager first became obsessed with the promise of graphene nanotubes \u2013 a technology that won Manchester university scientists\u00a0Andre Geim and Konstantin Novoselov<\/a>\u00a0the Nobel Prize in 2010 \u2013 by reading scientific papers in his spare time and contacting professors. Eventually Rice University, a private research university in Texas, allowed him to use its laboratory to develop his concept.<\/p>\n

The technology could be used in homes, where it could be fitted to taps, and in industry, where it could replace existing, non-renewable filtration systems such as reverse osmosis, said Alagappan. \u201cThis has the advantage that you don\u2019t have to throw away the filter and buy a new one,\u201d he added.<\/p>\n

Fredrik Moberg, the chair of the scientific jury for the Stockholm prize, said Alagappan had adapted graphene in an entirely novel way and the research he presented was so refined that he found himself scrutinising it in the same way he would peer-review the work of a senior scientist.<\/p>\n

\u201cAsking the other people in the jury who are experts in the field, they totally think that this could be developed into something that could be of great use both in treating waste water and purifying drinking water,\u201d he said.<\/p>\n

Alagappan, who has been accepted to study at Stanford University, plans to publish his findings in the scientific journal Nature Materials. The commercial production of the filters could begin immediately, he said, at a plant in Swansea, Wales, where similar materials are already produced on an industrial scale. The judging panel agreed: \u201cThrough its sound science and sustainable technology, the solution is scalable from household to industrial scale for a broad range of applications.\u201d<\/p>\n

Moberg said Alagappan\u2019s generosity with his idea continued the long tradition of science being conducted for the benefit of society.<\/p>\n

\u201cMany scientists come from that background where they really want to contribute and have it open-source. They see that as something they are proud of. They want to produce knowledge that everyone can benefit from,\u201d he said.<\/p>\n

R\u00e9mi Kaupp, a programme support officer at WaterAid, adds that it\u2019s the simple, affordable, long-lasting technologies available in local markets that are the most likely to be of use.<\/p>\n

\u201cInnovation is important if we are to reach everyone, everywhere with clean water by 2030, as is now promised in the UN\u2019s new\u00a0sustainable development goals<\/a>,\u201d said Kaupp. \u201cPerry Alagappan\u2019s technology demonstrates a new way of addressing a difficult and extremely troubling problem, water contamination with heavy metals. We\u2019re encouraged by assessments that this is an effective, scalable technology. It could go a long way in addressing industrial contamination of water.\u201d<\/p>\n

This article was published originally on theguardian.com website and can be found <\/em>here<\/em><\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

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