新闻 > 社会
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China

臭氧污染来了,我们应该怎么办?

2017-05-19 20:06:13   新华社

原标题:污染天又来?这次带你认识低调的臭氧污染

新华社北京5月19日电题:污染天又来?这次带你认识低调的臭氧污染

新华社记者高敬、张华迎

这几天华北地区遭遇的高温天气,还给人们带来了一个“副产品”臭氧污染。

中国环境监测总站的数据显示,19日15时,北京市空气质量指数AQI为139,空气质量轻度污染,首要污染物为臭氧。同一时间的数据显示,东北地区的吉林省长春市、长三角的浙江省杭州市、地处西南的四川省成都市等多个地方,均出现臭氧污染。根据预测,未来几天,京津冀、长三角等地区的臭氧污染还会持续。

好不容易告别了秋冬季节的PM2.5,又来了个臭氧污染。这略显低调的臭氧污染究竟是怎么回事?

臭氧是一种蓝色、有刺激性的气体,跟大家熟知的氧气是“亲兄弟”。众所周知,太阳辐射的紫外线对生物有很强的杀伤力。幸运的是,距地球表面25至50公里处有一层臭氧层。尽管臭氧层在地球表面并不太厚,但它却能大量吸收太阳辐射出的紫外线,使地球上的生物免遭紫外线的伤害。因此,臭氧层也被誉为是地球的“保护伞”。

专家指出,与高空中的臭氧层不同,由于臭氧具有的强氧化性,近地面的臭氧则是一种有害气体,甚至会成为“健康杀手”。较低浓度的臭氧具有很好的杀菌效果,已经广泛应用在很多领域。但如果空气中的臭氧浓度过高,很容易引起上呼吸道的炎症病变,出现咳嗽、头疼等症状,还会对皮肤、眼睛、鼻黏膜产生刺激。

臭氧污染是从哪来的?环保部副部长赵英民告诉记者,臭氧污染不是污染源直接排放产生的,而是排放到空气中的氮氧化物、挥发性有机物(VOCs),在空气中进行复杂的光化学反应产生的。

“近期华北地区的高温天气为臭氧的生成提供了更便利的条件。”天津市环境监测中心主任邓小文说,大气中的氮氧化物主要来自机动车、发电厂、燃煤锅炉和水泥炉窑等;挥发性有机物主要来自机动车、石化工业排放和有机溶剂的挥发等。

其实,臭氧污染并不是最近才出现的新问题。北京市一年约五六十天臭氧超标,主要集中在夏季。南方地区臭氧超标也主要集中在夏秋季节。

中科院大气所的有关专家介绍,与秋冬季节大气污染以细颗粒物为主不同,夏季空气污染的元凶多为臭氧。臭氧污染是各地治理PM2.5过程中会伴随产生的,两者是“按下葫芦浮起瓢”的关系。因为随着PM2.5浓度降低,空间透明性好了,辐射强、紫外线强,是生成臭氧的条件。

上一页1/2下一页
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China

相关阅读

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
分享到:
0 0
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China

美图推荐

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China

为您推荐

加载更多>>
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/10000169/20170519/30546668.html
Server: cms-8-251
Date: 2024/11/11 02:25:58

Powered by China
China