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专家:北京大幅度消除重污染天气至少需要25年

2016-01-09 05:03:28    新京报

据悉,北京已划拨43亿元,用于治理南部四区的污染。彭应登分析称,南部四区的工业燃煤锅炉全部进行清洁能源替代,大约需要5年至10年的时间。

8 北京治理扬尘目前收效如何

根据北京的源解析结果,北京地区的扬尘,主要来源于交通道路扬尘、施工建筑扬尘以及土壤风沙尘等。在PM2.5本地来源中,扬尘排放也是主要来源之一,占比14.3%。

根据2015年修订发布《绿色施工管理规程》,去年相关部门对全市1321个规模以上建筑工地实施视频扬尘污染监控,对33家扬尘问题严重的施工单位暂停在京投标资格1至3个月。全市道路清扫保洁新工艺作业率达到86%,每日再生水冲洗道路使用量超过2万立方米。此外,百万亩平原造林任务提前超额完成。

彭应登表示,扬尘治理措施及其效果不仅是技术层面的事,还与管理密切相关,如果管理不到位,最容易出现反弹。因此,扬尘治理的长期效果需要建立政府各部门、企业和社会齐抓共管的长效机制,才能奏效。

  9 京津冀协同治污进展如何

京津冀区域污染的连片性,使得区域内谁都不能独善其身。《京津冀协同发展生态环境保护规划》对京津冀的大气治理划定“红线”,到2020年,京津冀地区PM2.5浓度要比2013年下降40%左右,PM2.5年均浓度控制在64微克/立方米左右。

市环保局介绍,过去一年,京津冀及周边地区大气污染防治协作机制充分发挥了应有的作用,北京和周边省(区、市)、中央有关部门加强协作,区域协作机制进一步健全完善。

其中,北京与河北省保定、廊坊两市结对,支持大气污染治理资金4.6亿元,用于燃煤锅炉脱硫脱硝除尘深度治理。另外,通过区域联防联控,共同保障了重大活动期间空气质量。经过共同努力,去年8月20日至9月3日阅兵期间,北京连续15天一级优,区域七省区市PM2.5浓度同比平均下降30%左右,共同呈现了“阅兵蓝”。下一步,京津冀还将在空气重污染区域共同会商以及统一应急响应等方面,取得进展。

  10 为何公众感觉污染越来越重

市环保局数据显示,与2014年相比,北京二氧化硫、二氧化氮、PM10、PM2.5年均浓度分别下降38.1%、11.8%、12.3%、6.2%。1998年以来长期监测的三项污染物中,二氧化硫浓度下降89%,二氧化氮浓度下降32%,PM10浓度下降46%; PM2.5自2013年监测以来浓度下降10%。

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