【摘 要】
：
首先选取2014年01-05月的上海市空气质量(AQI)日报,对首要污染物出现的频率做出统计分析,同时借助SPSS,绘制并分析全市日平均PM2.5的时间分布图.然后根据上海市PM2.5的10个监
【基金项目】
：
上海市一流学科(系统科学)项目资助;
论文部分内容阅读
首先选取2014年01-05月的上海市空气质量(AQI)日报,对首要污染物出现的频率做出统计分析,同时借助SPSS,绘制并分析全市日平均PM2.5的时间分布图.然后根据上海市PM2.5的10个监测站点2014年01月-04月的PM2.5实时数据,对监测站点进行聚类分析,以发现各监测站点PM2.5的空间分布特征.最后根据聚类结果,按照《环境空气质量标准》,对PM2.5分区进行污染评估.研究表明,PM2.5是上海市现阶段空气中的首要污染物;全市日平均PM2.5浓度整体呈下降趋势;冬季PM2.5污染程度整体明显高于春季;聚类结果第一类青浦淀山湖站属于一类区,其PM2.5平均浓度远远超出一级环境空气污染物的浓度限值;第二三类属于二类区,其中浦东川沙站、浦东张江站PM2.5平均浓度稍低于二级环境空气污染物的浓度限值,而其他监测站点则高出二级环境空气污染物的浓度限值.
其他文献
Biosorption can be an effective process for the removal of heavy metals from aqueous solutions. The adsorption of Cu(Ⅱ) from aqueous solution on the extracellu
Increased water clarity associated with zebra mussel (Dreissena polymorpha) populations may favor benthic algal primary production in freshwater systems previou
Plants grown under elevated atmospheric [CO2] typically have decreased tissue concentrations of N compared with plants grown under current ambient [CO2]. The ph
Methamidophos (Met) is a broad spectrum organophosphorus insecticide and acaricide. Even a trace of its residue is harmful to humans and many animals. In this s
Reclamation of clean water from filter backwash water was studied through pilot-scale experiments. The pilot plant consisted of clarification, sand-filtration,
Toxicity identification evaluation (TIE) can be used to determine the specific toxicant(s) in industrial effluents. In the current study,the authors have attemp
To investigate the effects of polycyclic aromatic hydrocarbons (PAHs) and metals on the population reproduction, antioxidative defense system and cell ultrastru
Embryophytes (land plants) are distinguished from their green algal ancestors by diplobiontic life cycles,that is,alternation of multicellular gametophytic and
现代城市中的室内空气污染日益严重,室内空气污染的净化与治理已成为社会发展中迫切需要解决的关键科技问题之一。为此,根据植物电信号的低频特征与电共振原理,利用极低频负高压脉冲连续刺激盆栽吊兰植物的根际土壤,使吊兰叶片产生了显著的空气负离子倍增效应。在此基础上依据评价空气质量的常用指标:单极系数q、安培空气质量评价系数CI、空气负离子系数P和森林空气离子评价指数FCI,对应用负高压脉冲技术提高植物的空气
Cucumber (Cucumis sativus) is one of the most widely used vegetable in the world, and different pesticides have been extensively used for controlling the insect