日本无限资源_福禄影院午夜伦_美国av毛片_亚洲自拍在线观看_激情亚洲一区国产精品_999久久久久

Fugitive road dust PM2.5 emissions inventory of Lanzhou city constructed to quantify health impacts

Source: Xinhua| 2019-06-11 20:02:43|Editor: Li Xia
Video PlayerClose

LANZHOU, June 11 (Xinhua) -- Chinese researchers have constructed the fugitive road dust (FRD) PM2.5 emissions inventory in the inland city of Lanzhou, the provincial capital of northwest China's Gansu Province.

The FRD particles emitted by traffic-generated turbulence are an important contributor to urban PM2.5, said the research paper published in journal Environmental Science and Technology.

Sources of these particles include surrounding soil, mud carried by vehicles, demolition and construction, fly ash from asphalt, bioclastics and natural dust deposition.

In urban areas of developing countries, FRD PM2.5 emissions are a serious environmental threat to air quality and public health.

Based on field sampling and numerical simulation, the researchers from Lanzhou University and Peking University built the FRD PM2.5 emissions inventory of 2017 with high-resolution.

They investigated the spatiotemporal characteristics of the FRD emissions in different urban function zones and quantified their health impacts.

They found that the FRD PM2.5 emission was approximately 11 tonnes, accounting for 24.6 percent of total PM2.5 emission in urban Lanzhou, while the industrial sources, energy production and vehicle exhaust account for 38.2 percent, 29.6 percent and 4.8 percent, respectively.

Spatially, high emissions occurred over areas with smaller particle sizes, larger traffic intensities and more frequent construction activities.

FRD particles are an important carrier for high levels of harmful components such as heavy metal elements, hydrocarbons and other carcinogens, which exert a high potential health burden on cardiovascular and respiratory diseases and cancer.

Reducing FRD emissions is an important step forward to protect public health in many developing urban regions, said the research paper.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001381343111
主站蜘蛛池模板: 国产精品久久久久久影视不卡 | 日本美女一区二区三区插比 | 天堂va欧美ⅴa亚洲va | 蜜桃视频成人在线观看 | 欧美国产综合一区 | 视频一区二区三区免费观看 | 麻豆视传媒 | A级毛片高清免费视频在线播放 | 中国av免费在线观看 | 一二区免费视频 | 日韩视频网站在线观看 | 日韩美女乱婬免费看视频大黄 | 欧美人与动人物xxxx | 国产亚洲欧美精品一区 | 亂倫近親相姦中文字幕视频 | 日本三级全黄三级a | 久久99精品久久久久久琪琪 | 欧洲国产成人久久精品综合 | 欧美激情极品久久久久久 | 美女日p | 婷婷激情综合色五月久久图片 | 黄色网免费在线观看 | 日日爱886 | 久久艹色 | 蜜桃av入口观看 | 国产精品毛片无遮挡 | 91蜜桃麻豆 | 国产精品久久久久久久久免费桃花 | 国产成人精品久久亚洲高清不卡 | 熟女乱色一区二区三区 | 国产精品日产三级在线 | 日本视频在线观看免费 | 最新91在线 | 亚洲交一区 | 国产a一区二区 | 午夜三级视频 | caoporn超碰进入页面 | 国产999在线| 国产成人精品一区二区免费看京 | 男女视频一区二区 | 特级毛片片A片AAAAAA |