太原市大气污染现状分析及治理对策

文章根据太原市区环境空气质量监测数据对太原市的主要污染源、污染物及污染原因进行了分析,并提出了改善太原市大气环境质量的对策.     

机动车排气污染及其防治

介绍了机动车排气污染的特点及其防治意义，提出了生产环保汽车、改换燃料、提高汽油质量、提高尾气净化技术、加强机动车达标排放申报核准制度等防治机动车排气污染的措施。     

^7Be and ^210pb radioactivity and implications on sources of surface ozone at Mt. Waliguan

Beryllium-7 (^7Be) and lead-210 (^210Pb) radioactivity in aerosols collected, from October 2002 to January 2004 at Mt. Waliguan, by the Global Atmospheric Watch (GAW) Station, Qinghai Province is presented. The data were analyzed together with simultaneously measured surface ozone concentrations. We found that short time variations of ^7Be and ^210Pb were linked to alternations of synoptic weather around the Mt. Waliguan region. ^210Pb showed the lowest concentration in summer while ^7Be showed no obvious seasonal changes. Relatively high ^7Be and ^210Pb radioactivity was observed at Mt. Waliguan when compared with the observations at other mountain sites in other parts of the world. Surface ozone and ^7Be showed a consistent seasonal variation. Surface ozone correlated fairly well with ^7Be/^210Pb ratio. This suggested that vertical transport from higher altitudes of the atmosphere has predominant effects on the budget of surface ozone at Mt. Waliguan.     

大气污染与城市绿化植物

大气污染对城市绿化植物的影响;绿化植物对大气污染起到预防作用;因地制宜选择绿化树种,既有利于植物的生长,又有利于改善环境.     

延安市城区大气污染特征及影响因素

根据延安市城区2003—2004年间大气污染物浓度资料,应用统计的方法分析了大气中主要污染物二氧化硫、二氧化氮、可吸入颗粒物随季节变化,日时间变化和空间变化的污染特征,并分析了风向、风速、降水、云量、浮尘、逆温等气象因素以及城区地形和人为因素对城区污染物浓度变化的影响.结果表明:延安市城区大气污染状况存在着显著的季节差异和地域性差异,日大气污染呈现明显的双峰特征.风和降水是影响大气污染程度的主要气象因子.     

上海市黄浦区近五年的大气环境质量变化分析

该文对上海市黄浦区的大气中污染因子二氧化硫、氮氧化物、总悬浮颗粒近 5年内的变化情况以及产生这种变化的原因作了介绍和分析 .     

积分法在计算丹东市大气降尘上的应用

把城市建成区划分为三角形网格状，在网格内设立监测点测定大气降尘，利用积分法求大气降尘平均污染表达式，以此式计算城市建成区降尘网格监测平均值。     

光化学烟雾大气污染的形成机理

本对光化学烟雾的形成机理，生成条件进行了探讨。     

倒焰窑消烟除尘的技术原理与工艺设计

通过对倒焰窑烟尘排放特性及产生原因的分析，结合陶瓷烧成工艺特点，应用三床分相、内强混合和旋转燃烧的技术原理及方法，进行倒焰窑消烟除尘工艺设计，并在生产性试验和推广应用中获得成功改造后的倒焰窑烟尘排放浓度小于２００ｍｇ／ｍ３，烟气黑度小于林格量１级     

Formate and acetate as recorded in a mid－latitude glacier in west China

Formic (HCOOH) and acetic (CH3COOH) acids are the chief carboxylic compounds in the troposphere[1]. Although weak acids, they contribute significantly to the free acidity, ionic balance of precipitation and the chemical reactions in the atmosphere, especially in the remote areas[2—4]. General sources for formate and acetate have been identified in the past 3 decades although a satisfactory source attribution is lacking to explain atmospheric observations[5]. Possible sources include veget…