China's 'world's biggest air purifier' appears to be working


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The “world’s biggest air purifier” is noticeably improving the atmospheric quality in the Chinese city of Xian according to the scientist behind the experiment, reported by the South China Morning Post.

Cao Junji, who heads the research, told The Beijinger that the 100-meter-high anti-smog tower can produce about 10 million cubic meters of fresh air every day. This could be a major breakthrough for China, which has been fighting air pollution for a long time now (Reuters).  

Xian’s purifier device was first constructed in May 2016 as a test model and it is still considered an ongoing experiment. Its main goal is to remove tiny pollutants known as PM2.5, which are the most harmful to human health, among other substances like nitrates and sulphur dioxide (The Times).

The tower, in the capital of the central Shaanxi province, is surrounded by greenhouses which take in the polluted air and then heat it up with solar energy. This hot air is then cleansed by a series of filters placed inside the facility. 

Although the project is still at an experimental phase, Cao said the outlook so far is encouraging. Preliminary results suggest that the tower reduces average PM2.5 levels by 15 per cent at times of severe smog. An official report will be released in March with further data and information, according to the South China Morning Post.

In 2016, Dutch artist Daan Roosegaarde and his team built a seven-meter-tall air purifier at a creative park in Beijing, which was at the time considered as the world’s tallest anti-smog tower (Quartz).

This is an emerging story which needs expansion if you wish to EDIT to add information or discuss it in TALK.

 

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