Study: China's "three North" shelterbelts can be adsorbed to clear PM2.5-PM2.5, smog, governance-IT information

Lanzhou, Lanzhou, January 2 University researchers in a new study results showed that"three North" protection forest project in North China air pollutant sulfur dioxide, nitrogen oxide and PM2.5 have a role in adsorption and removal. Previously, domestic "three North" protection forest project on atmospheric pollutants adsorbed and the scavenging effects of the lack of systematic research.

Numerical simulation and observation based on long-term research, College of resource and environment of Lanzhou University Professor Ma Jianmin and his team of researchers concluded that compared with 1982, 2010 "three North" protection forest project on sulfur dioxide and nitrogen oxides adsorption and removal effect of growth 60%. "If the measurement unit is ' North ' shelterbelt during 1982-2010 on sulphur dioxide and nitrogen oxides adsorption and removal of up to 1.1 million tonnes, of which" three North "protection forest area around 50% per cent of total removals in North China, the" three North "protection forest on the significance of improving air quality in North China. "Ma Jianmin said.

Meanwhile, the study found, compared with 1982, 2010 "three North" protection forest project on the adsorption and removal of PM2.5 increases 30%. Ma Jianmin introduced from 1999 to 2010, the project has cleared about 30 million tonnes of PM2.5 in North China, which cleared most areas in North China, 0.9% of the total removals of PM2.5.

Team members, College of resource and environment of Lanzhou University Dr Huang Tao introduction, "If there is no ' North ' shelterbelt, three northern regions of organic pollutants by adsorption or removal action will reduce 30%, clear of strong carcinogen benzopyrene will reduce 50%. Benzopyrene is the main toxic substances of PM2.5. ”

Researchers monitoring and research also showed that "three North" protection forest in the atmospheric pollutants than low levels of pollutants outside the forest. They predicted that the "three North" protection forest project when completed in 2050 of organic pollutants by adsorption and removal will continue to grow. Among them, the strong carcinogens of polycyclic aromatic hydrocarbons adsorbed and the scavenging effect will grow 1.9 times more than in 1990. Research also found that the "three North" protection forest project in the adsorption and removal of air pollutants at the same time, also emit a certain amount of volatile organic compounds isoprene. Isoprene is PM2.5 and ozone precursor compounds.

Research results have been published in the environmental pollution of the atmospheric chemistry and physics, the International Journal of environmental science and technology.

"Three North" protection forest project is in Northwestern China, North China and Northeast China forestry ecological engineering construction of large scale artificial, 42.4% per cent of China's land area, aimed at improving the ecological environment.

Ma Jianmin, and jeric Huang, research personnel recommends: in "three North" shelterbelt engineering next of construction in the, related sector should consider to different species on atmosphere pollutants of adsorption and clear role and on volatile sex organic compounds of emissions role, should be select drought, and Hardy, and both conducive to adsorption and clear air pollution real, and and can reduced volatile sex organic compounds biological emissions of species, to better to play the engineering of related role.

研究：中国“三北”防护林可吸附清除PM2.5 - PM2.5,雾霾,治理 - IT资讯

兰州1月2日电 兰州大学科研人员的一项最新研究成果显示，“三北”防护林工程对中国北方大气污染物二氧化硫、氮氧化物和PM2.5具有一定的吸附和清除作用。此前，国内对“三北”防护林工程是否对大气污染物有吸附和清除作用缺乏系统的研究。

基于长期的数值模拟和观测研究，兰州大学资源环境学院教授马建民和其团队科研人员分析得出，与1982年相比，2010年“三北”防护林工程对二氧化硫和氮氧化物的吸附和清除作用增长了60%。“如果按计量单位算，‘三北’防护林在1982到2010年期间对二氧化硫和氮氧化物的吸附和清除达到了110万吨，其中“三北”防护林的华北片区占总清除量的50%左右，可见“三北”防护林对改善中国北方空气质量的意义。”马建民说。

同时，研究发现，和1982年相比，2010年“三北”防护林工程对PM2.5的吸附和清除能力增加了30%。马建民介绍，自1999年到2010年间，该工程清除了中国北方约3000万吨的PM2.5，其中清除最多的地区是华北片，清除量达到PM2.5总量的0.9%。

团队成员、兰州大学资源环境学院黄韬博士介绍，“如果没有‘三北’防护林工程，三北地区对有机污染物的吸附或清除作用就会降低30%，对强致癌物苯并芘的清除将会降低50%。苯并芘是PM2.5中的主要有毒物质。”

科研人员的监测和研究还显示，“三北”防护林内的大气污染物比林外的污染物含量低。他们预测，“三北”防护林工程到2050年建成时对有机污染物的吸附和清除将继续增长。其中，对强致癌物多环芳烃的吸附和清除作用较1990年相比将增长1.9倍。研究也发现，“三北”防护林工程在吸附和清除大气污染物的同时，也排放了一定数量的挥发性有机化合物异戊二烯。异戊二烯是PM2.5和臭氧的前体化合物。

相关研究成果已发表在《环境污染》《大气化学与物理》《环境科学与技术》等国际权威期刊上。

“三北”防护林工程是中国在西北、华北和东北建设的大型人工林业生态工程，占中国陆地面积的42.4%，旨在改善生态环境。

马建民、黄韬等科研人员建议:在“三北”防护林工程接下来的建设中，相关部门应考虑到不同树种对大气污染物的吸附和清除作用以及对挥发性有机化合物的排放作用，宜选择耐旱、耐寒、既有利于吸附和清除大气污染物、又能减少挥发性有机化合物生物排放的树种，以更好地发挥该工程的相关作用。