城市大气环境的氮氧化物污染及治理技术研究  

Study on Nitrogen Oxide Pollution and Treatment Technology of Urban Atmospheric Environment

作　　者：黄鑫 HUANG Xin(Fujian Fuzhou Environmental Monitoring Center Station,Fuzhou 350000,China)

机构地区：[1]福建省福州环境监测中心站,福建福州350000

出　　处：《中国资源综合利用》2022年第4期142-144,共3页China Resources Comprehensive Utilization

摘　　要：高层建筑形成的城市街道峡谷阻碍了机动车尾气的扩散,加剧了路边空气污染,使公众面临严重的健康风险。本文综述了影响城市街道峡谷中车辆排放物产生与扩散的因素,提出了治理路边空气污染的策略。研究表明,空气污染并不全是交通拥挤造成的,关键因素还包括峡谷几何形态、天气状况和化学反应等。因此,可通过两类缓解策略来减轻空气污染。一是交通干预,如设置低排放区、收取拥堵费等,二是城市规划,如设计较低的峡谷纵横比、街道与盛行风对齐、建筑高度和地面建筑空隙率分布不均匀、设置路内屏障等。Urban street canyons created by high-rise buildings hinder the diffusion of motor vehicle exhaust,exacerbate roadside air pollution,and expose the public to serious health risks.This paper reviews the factors that affect the generation and diffusion of vehicle emissions in urban street canyons,and proposes strategies to control roadside air pollution.Research shows that air pollution is not all caused by traffic congestion,key factors also include canyon geometry,weather conditions and chemical reactions.Therefore,air pollution can be mitigated through two types of mitigation strategies.One is traffic intervention,such as setting low-emission zones and charging congestion charges,the other is urban planning,such as designing lower canyon aspect ratios,alignment of streets with prevailing winds,uneven distribution of building heights and ground building void ratios,and setting up road barriers.

关 键 词：城市街道峡谷 路边空气质量 影响因素 控制措施 

分 类 号：X701[环境科学与工程—环境工程]