Expert: ozone gradually in addition to particle colonization, the biggest pollutant
Beijing News Alerts (by Deng Qi) this morning, Chen Jining to the national people's Congress, Minister of environmental protection of the State Council on 2015-State of the environment and environmental protection target completion of the report, noted that particulate matter pollution as the main factor, increasing ozone pollution. Many in the industry have also recently noted that ozone is becoming in addition to grain, and pollutants of greatest impact on ambient air quality.
Data show that last September, the Department of environmental protection issued the August national air quality exceeds the number of days in 74 cities in key areas, most of days with ozone as the primary pollutant, then known as PM2.5. This is since May last year, PM2.5 for the fourth consecutive month of ozone, air quality standard of "culprits".
What is ozone? environmental experts, ozone usually exists in the upper atmosphere at about 30 kilometers off the ground, it can effectively block UV rays, protecting human health. But near the ground, ozone is a pollutant, and irritation of the respiratory tract after inhaled and aggravate the symptoms of patients with emphysema, bronchitis and other diseases, so the ozone standard more afternoon sessions, these people and the elderly, children and to minimize outdoor activities.
Insiders pointed out that current ozone pollution research and control in the industry is still in its initial stages. However, ozone has entered the official view, in 2012, the new ambient air quality standards issued, the new 8-hour average ozone concentration limits. When the primary pollutant 1 hour ozone averages more than 400 or 8-hour moving average exceeds 265 air quality reached levels of pollution.
According to the Beijing environmental protection monitor Center, Beijing from May to September when the temperature is higher, prone to excessive ozone pollution.
Late last year, the Beijing municipal environmental protection Bureau to invite from planning studies related to environmental protection agencies, colleges and universities of 8 experts and scholars in the field, on the preparation of the Beijing city "Thirteen-Five" environmental protection and ecological construction plan (draft for soliciting opinions) pulse of consultation. There were experts in environmental monitoring, motor vehicle pollution reduction should be the prevention and control of air pollution in Beijing a top priority in Beijing the summer ozone pollution is mainly caused by vehicle emissions. Therefore, it is urgent to launch differentiated fuel charges, parking fees, low emission zone, economic and administrative means to guide vehicles reduce their strength, mileage, fuel use and emissions.
It is understood that the nitrogen oxides and volatile organic compounds are precursors of ozone, have been included in the list of emission sources in Beijing. Both of these pollutants come from vehicle exhaust, so Beijing through elimination of old motor vehicles, motor vehicle emissions and fuel standards, control the amount of vehicle or any other means, but also to control ozone pollution.
In addition, Beijing plans to increase the atmospheric environment air automatic monitoring stations this year, currently has 35 stations is expected to double to about 70. In monitoring the project, future monitoring of volatile organic compounds, and so on.
(Editors: Pan Yi burn UN657)
2016-04-25 19:51:06
The Beijing News
专家：臭氧逐步成除颗粒物外最大污染物
新京报快讯 (记者邓琦)今日上午，环保部部长陈吉宁向全国人大常委会作《国务院关于2015年度环境状况和环境保护目标完成情况的报告》时指出，颗粒物为主要污染因子，臭氧污染问题日益增多。许多业内人士最近也指出，臭氧正逐步成为除了颗粒物外，对环境空气质量影响最大的污染物。
数据显示，去年9月，环保部发布8月份全国重点区域74个城市的空气质量超标天数中，以臭氧为首要污染物的天数最多，其次是大家熟知的PM2.5。这是自去年5月份以来，臭氧连续第四个月取代PM2.5，成为空气质量超标的“元凶”。
臭氧究竟是什么?环保专家介绍，臭氧通常存在于距离地面30公里左右的高层大气中，它能有效阻挡紫外线，保护人类健康。但是在近地面，臭氧却是一种污染物，被人体吸入后会刺激呼吸道，明显加重肺气肿、支气管炎等疾病患者的症状，因此在臭氧超标较多的下午时段，上述人群及老人、儿童还是要尽量减少户外活动。
有业内人士指出，目前业界针对臭氧污染的研究和治理还处于起步阶段。不过，臭氧早已进入了官方视线，2012年，新版环境空气质量标准修订发布，新增了臭氧8小时平均浓度限制。当首要污染物臭氧1小时平均值超过400或者8小时滑动平均值超过265时，空气质量达到重度污染级别。
据北京市环保监测中心介绍，北京5月到9月温度较高时，易发生臭氧超标污染。
去年底，北京市环保局邀请来自环境保护相关规划研究机构、高等院校等领域的8名专家学者，就编制《北京市“十三五”时期环境保护和生态建设规划(征求意见稿)》把脉会诊。当时有环境监测方面的专家表示，机动车污染减排应是北京市大气污染防治的重中之重，北京地区夏季的臭氧污染也主要是由于机动车排放造成的。因此，亟需推出燃油排污费、差异化停车收费、低排放区等经济、行政手段，引导机动车降低使用强度、里程、燃油量及其排放量。
据了解，氮氧化物、挥发性有机物是臭氧的前体物，均已被列入北京的排放源清单中。这两种污染物大量产生于机动车尾气排放，因此北京通过淘汰老旧机动车、提高机动车排放以及燃油标准、控制机动车保有量等方式，也有利于防治臭氧污染。
另外，北京今年计划增加大气环境空气自动监测站，目前已有的35个监测站预计翻倍至70个左右。在监测项目中，未来有望监测挥发性有机物等。
(责任编辑：潘奕燃 UN657)
2016-04-25 19:51:06
新京报