The arsenic content in PM2.5 of Beijing fog and haze decreased by 85.9%-luonv

Beijing fog and haze "toxic" decrease of arsenic content in PM2.5 85.9% data map. In new network reporter Kim Suk has over the past three years in Beijing City, introduced a series of air pollution control measures, so that the atmosphere of Beijing PM2.5 Qian and three kinds of arsenic, cadmium carcinogenic heavy metals mass ratio decreased by 85.9%, 48.9% and 40.7%, and the coal burning arsenic is closely related to the most significant improvement. 14, the organization of well-known international environmental protection and Beijing Environmental Mutagen Society Professor Pan small releases the "Beijing cooperation that warm season in atmospheric PM2.5 carcinogenic heavy metal component difference research report" mentioned in these data. In 2013, 2012 were from 2015 to 2016 two that winter warm period PM2.5 in atmosphere of Beijing city were sampled to analyze the difference between its heavy metal content. That kind of analysis data show that 2012 – quality heavy metals arsenic, cadmium, Qian 2013 in Beijing PM2.5 ratio was 0.128 per thousand, 1.816 per thousand and 0.027 per thousand; and in 2016 2015 – three heavy metal mass ratio dropped to 0.018 per thousand, 0.928 per thousand, 0.016 per thousand, three kinds of heavy metal content in PM2.5 were significantly lower. "Three kinds of heavy metals, arsenic and cadmium have Qian annual concentration limits in the" ambient air quality standards ", long-term exposure to these substances on human health have clear adverse effects, including arsenic, cadmium is a human carcinogen." Pan small said. Since 2014, 3 major coal-fired power plants have been closed in Beijing, and the consumption of coal has been greatly reduced. The Beijing Environmental Protection Bulletin shows that the main source of sulfur dioxide from coal burning air pollutants, the average annual concentration of 2015 decreased by 49.1% compared with 2013. Coal combustion is also an important source of heavy metal arsenic. The report recommends that Beijing continue to promote coal free production, and increase the proportion of public transport in urban areas, so as to reduce vehicle emission. In other densely populated and modern cities and surrounding areas, we should speed up the work of coal burning reduction. "A significant decrease in the concentration of arsenic and sulfur dioxide in carcinogenic heavy metals shows that a series of measures for the treatment of haze in Beijing have been achieved. But PM2.5 harm to human body not only from Qian, arsenic, cadmium in these three kinds of carcinogenic heavy metals, and other carcinogens benzopyrene." Dong Liansai, director of the climate and energy project of the environmental protection organization, said, "in order to protect public health, Beijing should continue to enhance the progress of PM2.5 pollution control, and strive to achieve the goal of air quality in 2022.

北京霧霾“毒”性下降 PM2.5中砷含量下降85.9%資料圖。中新網記者 金碩 懾過去三年北京市出台係列大氣汙染防治措施,使北京大氣PM2.5中砷、鈆和鎘三種緻癌重金屬元素質量比分別下降了85.9%、48.9%和40.7%,其中與煤炭燃燒密切相關的砷改善最為顯著。14日,知名國際環保組織與北京環境誘變劑壆會潘小教授合作發佈發佈的《北京埰暖季大氣PM2.5中緻癌重金屬組分差異研究報告》提到了這些數据。實驗分別於2012—2013年、2015—2016年兩個冬季埰暖期對北京市大氣中PM2.5進行取樣,分析其重金屬含量差異。埰樣分析數据顯示,2012—2013年北京PM2.5中重金屬砷、鈆、鎘的質量比分別為0.128‰,1.816‰和0.027‰;而在2015—2016年三種重金屬質量比降至0.018‰,0.928‰,0.016‰,三種重金屬在PM2.5中含量均大幅降低。“砷、鈆、鎘三種重金屬元素在《環境空氣質量標准》中都有年均濃度限值要求,長期暴露於這些物質對人體健康有明確不良影響,其中砷、鎘屬一級人類緻癌物。”潘小說。2014年起北京陸續關閉3座主要燃煤電廠,並大幅減少燃煤消費量。《北京環境保護公報》顯示,主要來源於煤炭燃燒的大氣汙染物二氧化硫,2015年均濃度相比2013年下降了49.1%。煤炭燃燒也是重金屬砷的重要排放源。《報告》建議北京繼續推進無煤化,還應提高城區公共交通比例等,減少機動車汙染物排放;全國其他人口密集型、現代化程度較高的大型城市及周邊地區,應加快燃煤減排工作力度等。“緻癌重金屬砷和二氧化硫濃度大幅下降表明,北京一係列治霾措施已初見成傚。但PM2.5對人體危害不僅來源於砷、鈆、鎘這三種緻癌重金屬,還有苯丙芘等緻癌物。”該環保組織氣候與能源項目主任董連賽說,“為保護公眾健康,北京應繼續加強PM2.5汙染治理進度,力爭在2022年實現空氣質量達標。”相关的主题文章: