植物叶片SOD活性分析及植物抗性等级的划分

本文分析了５０种绿化植物的ＳＯＤ活性，并以叶片ＳＯＤ活性为指标，依（Ｘ±ＳＷ）统计原理划分植物抗性等级．比较不同类型植物的ＳＯＤ含量，证实灌木的ＳＯＤ活性高于乔木；阔叶树高于针叶树；幼叶高于成叶。     

Radiative forcing due to dust aerosol over east Asia-north Pacific region during spring, 2001

Atmosphericaerosolsinfluencetheradiationbudgetoftheatmosphere-terrestrialsystem,andthereforeinflu-encetheclimate.Dustaerosolisconsideredtobeacriticalfactortoclimateforcingamongotherkindsofaerosols,whichaccountsfor30percentofaerosolloadingandop-ticaldepth[1].Therearelargeuncertaintiesinthequantita-tiveassessmentsoftheradiativeeffectofdustatthepre-sentday,involvingvariousfactors:refractiveindices,par-ticlesizedistribution,atmosphericaerosolloading,parti-cleshape,etc.[2].Dustaerosolgenerallyorigi…     

晋中市榆次区1991年～2000年SO2污染分析

对山西省晋中市榆次区近10年(1991年～2000年)大气中SO2污染物浓度进行监测,所得数据用方差分析进行分析．结果表明：夏季SO2污染最轻,没有超过国家《环境空气质量标准(GB3095—82)》日均浓度二级标准;春季和秋季污染情况比较接近,均超过夏季,但没有超过国家二级标准;冬季SO2污染最为严重,超过国家《环境空气质量标准》日均浓度二级标准(0．15mg／m^3)的2倍～4倍．此外,对造成榆次区SO2污染严重的原因也进行了分析,并提出了有关的防治对策．     

Photocatalytic Oxidation of NOx with Porous TiO2 Nanometer Thin Film

A new kind of porous nano-TiO2 composite films was prepared on the glass substrate with the water glass as hinders and the sodium fluorosilicate as solidifying reagent. The morphologies of the films were studied by scanning electron microscope(SEM). The UV-Vis spectrophotometer was also used to investigate the absorption of the films. The gasphase photocatalytic oxidation of nitrogen oxides on the composite film was carried out in TiO2 UV system, and some important factors affecting the photocatalytic oxidation were also studied such as the catalyst concentration, vapor pressure and the presence of oxygen. The results showed the conversion of NOx reached 97.5% after 2 h UV-irradiation. The final product of photo-oxidation was detected to be HNO3 hy FT-IR. The way of photocatalytic oxidation of NOx was possibly useful in the practical application.     

基于ISC3模型的南宁市SO_2污染控制策略

为了定量分析能源政策和城市用地布局对大气环境质量的影响,给城市总体规划提供决策支持,以南宁市为例,应用ISC 3模型和情景分析相结合的方法对SO2控制策略进行模拟研究。结果表明,若不采取任何控制措施,到2010年,研究区域的SO2年日平均浓度将达58μg/m3,超标率(浓度年均值超过国家二级标准的区域面积占总面积的比例)为38.94%;单一的控制措施可以减轻污染水平,但不能完全满足国家二级标准要求;若采取综合控制策略,平均浓度达到34μg/m3,所有网格均满足国家二级标准要求。上述探讨,为制定南宁市大气污染控制对策及调整空间用地布局提供了有效的支持。     

聚类分析法在大气环境质量评价中的应用

大气环境质量评价工作是一项重要但又复杂的工作，用传统方法很难准确判断。用聚类分析方法来处理这一类问题，可得出综合，客观，准确的结论。文章对这一方法在国内大气环境质量现状评价中的应用进行了综述。     

植物对氟和硫的积累及其评价功能研究

植物对于一定范围的大气污染物，不仅具有一定的抵抗力，而且具有相当程度的吸收有害气体的能力．本文对焦作市主要街道两侧绿色植物体内的氟化物和硫化物进行了测定．结果表明，绿色植物对大气中的污染物有很强的吸收和富集作用，秋季叶片中硫和氟污染物的含量高于春季，且与污染强度相吻合．研究污染物在植物体内的积累是监测和评价大气污染的十分有效的方法．     

大气污染及其控制对策

随着经济的发展，大气污染严重影响人们的生产生活，日益成为人们关注的焦点。本文通过对长春市自然状况及污染现状的分析，指出目前长春市的大气污染主要为煤烟型污染，同时分析了机动车尾气排放的潜在影响及波及范围，针对烟尘污染及机动车排放的尾气对大气环境的污染提出了相应的对策。     

陕西省岐山县大气环境质量状况及治理研究

根据陕西省岐山县人口密集的凤鸣镇和工业密集的经济开发区蔡家坡镇2001-2002年各月份大气环境监测资料，同时选取了城郊的周公庙地区作为空气质量优秀的对照区进行对比，对该县的大气质量状况进行分析评价．结果表明，造成该地区大气污染的首要污染物是可吸入颗粒物PM10(悬浮在空气中空气动力学当量直径≤10μm的颗粒物)，它使该地区大气受到了中度污染；SO2也是大气中的主要污染物，NO2污染轻微．在一年内，冬春季污染强，其他季节弱．总结得出，要提高该地区大气环境质量，采用湿法脱硫技术和除尘技术、搞好城市规划、改变能源结构、增加绿地覆盖是控制大气环境质量的必要措施．     

CH4 emission and recovery from municipal solid waste in China

Methane (CH4) is an important greenhouse gas and a major environmental pollutant, second only to carbon dioxide (CO2) in its contribution to potential global wanning. In many cases, methane emission from landfills otherwise emitted to the atmosphere can be removed and utilized, or significantly reduced in quantity by using cost-effective management methods. The gas can also be used as a residential, commercial,or industrial fuel. Therefore, emission reduction strategies have the potential to become low cost, or even profitable. The annual growth rate of Municipal Solid Waste (MSW) output in China is 6.24% , with the highest levels found in South China, Southwest China and East China. Cities and towns axe developing quickly in these regions. MSW output was only 76.36 Mt in 1991 and increased to 109.82 Mt in 1997, registering an average increase of 43.8% . In China, methane emission from landfills also increased from 5.88 Mt in 1991 to 8.46 Mt in 1997; so the recovery of methane from landfills is a profitable project.