您现在的位置:首页>媒体暨大>最新

【CGTN】Aiming for Cleaner Air: Machine tracks pollution sources within hours

字体: 2019年04月15日 浏览量: 来源: CGTN 作者: 发布:新闻中心

With China's air pollution blamed for a wide range of environmental and health issues, the government is taking action. Levels of the pollutant PM 2.5 are down in most Chinese cities. Now, an online detection system has been installed in many cities to find out what's contaminating the air. CGTN's Li Jianhua has more.

Car exhaust, dust and factory emissions continue choking China. The nation has suffered from particulate matter 2.5 for years, a chronic pollutant. Studies show the number of premature deaths due to air pollution nears nine million every year.

Now a group of scientists in Southern China's Guangdong province are monitoring the sources of air pollution – especially PM 2.5 - in over 100 Chinese cities. Invented in 2012, the machine – upgraded over the years – is able to provide statistics about air pollution by the hour.

PROF. ZHOU ZHEN INSTITUTE OF MASS SPECTROMETRY & ATMOSPHERIC ENVIRONMENT, JINAN UNI. "This is the only way to monitor the sources of PM 2.5 particles in the event of heavy air pollution. It plays an important role in setting guidelines to tackle air pollution and addressing the public's concerns. It can also save the government a great amount of money in preventing air pollution."

Now the machine has been sold to several developed countries, including the U.S. and in the future some heavily polluted developing countries will be encouraged to get them.

To find out how the machine works, we came to the lab where one is being tested and ready for sale.

LI LEI JUNIOR RESEARCHER, JINAN UNIVERSITY "This part is called an aerodynamic lens. It sucks particles from the air into this tube and lines up the haphazard particles. The particles' speed is related to their diameter. By measuring the speed of the passing particles, we can find out their diameters. We have two lasers down here, which are placed like this. By measuring the time a particle spends on passing the lasers, we know the speed of it."

The machine doesn't work by sitting in the office. We boarded a van equipped with the machine, which just collected some air pollution samples.

BI YANRU ENGINEER, HEXIN MASS SPECTROMETRY "This is the online air pollution spectrum. In the pie chart, we can tell the pollution is mainly comprised of car emissions. Second is coal. Now it's around 15 percent. But in the winter in northern China, it would move up to be the main pollution source."

Many Asian countries, including South Korea, India and Thailand, are all suffering from air pollution. Now measures to detect the pollution source are ready but solutions to curb air pollution may require a lot more effort. LJH, CGTN, GUANGZHOU.(2019-04-15)

报道链接:https://news.cgtn.com/news/3367444e33494464776c6d636a4e6e62684a4856/index.html

责编:苏云生 蒋琴

请选择您看到这篇新闻时的心情
感动 同情 无聊 愤怒 搞笑 难过 高兴 路过
我来说两句
暨南微信 暨南微信