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81.
关于环境空气质量和谐度的研究与应用 总被引:1,自引:0,他引:1
在目前我国城市都在应用空气污染指数来评价空气质量的基础上,提出应用环境空气质量和谐度来评价大、中型城市环境空气质量,详细阐述了环境空气质量和谐度的定义、评价依据、级别划分、评价方法以及定性描述,并对环境空气质量和谐度对城市环境空气质量评价进行了应用。 相似文献
82.
通过分析2006~2010年空气自动监测的数据,结果表明:沈阳市这5年空气污染日数占全年总天数的9.9%-12.1%,其中,冬季污染日最多,春季次之,秋季和夏季污染日较少. 相似文献
83.
Air quality nearby road traffic tunnel portals: BTEX monitoring 总被引:3,自引:0,他引:3
Fabio Murena 《环境科学学报(英文版)》2007,19(5):578-583
A monitoring campaign of BTEX (benzene, toluene, ethylbenzene, o- m- and p-xylene) was carried out nearby two tunnel portals in the urban area of Naples with the aim to verify air quality in this kind of urban sites. Sampling was carried out using the active adsorption technique. Sampling time was 1 h. Ambient temperature and traffic flow measurements were carried out during each sampling operation. The results indicate that average benzene concentrations at both sites exceed the limit value of 10 μg/Nm^3 established by the European Community (EC) (Dir. 2000/69). Concentration levels of other BTEX are relatively high as well. A correlation between BTEX concentration and two wheeler vehicle flow was observed. 相似文献
84.
Xi Cheng Hong Li Yujie Zhang Yuping Li Weiqi Zhang Xuezhong Wang Fang Bi Hao Zhang Jian Gao Fahe Chai Xiaoxiu Lun Yizhen Chen Jian Gao Junyi Lv 《环境科学学报(英文版)》2018,30(9):150-167
Continuous observation of isoprene, α-pinene and β-pinene was carried out in a typical urban area of Beijing from March 2014 to February 2015, using an AirmoV OC online analyzer. Based on the analysis of the ambient level and variation characteristics of isoprene, α-pinene and β-pinene, the chemical reactivity was studied, and their sources were identified. Results showed that the concentrations of isoprene, α-pinene and β-pinene in the urban area of Beijing were lower than those in richly vegetated areas; the concentrations of isoprene were at a moderate level compared with those of previous studies of Beijing. Concentrations of isoprene, α-pinene and β-pinene showed different seasonal, monthly, daily and diurnal variations, and all of the three species showed higher level at night than those in the daytime as a whole, the variations of isoprene, α-pinene and β-pinene mainly influenced by emission of sources, photochemical reaction, and meteorological parameters. Isoprene was the largest contributor to the total OFP values than α-pinene and β-pinene. α-Pinene was the largest contributor to the total SOAFP values than isoprene and β-pinene in autumn, while isoprene was the largest one in other seasons. Isoprene, α-pinene and β-pinene were derived mainly from biological sources; and α-pinene level were also affected by industrial sources. To reduce the concentrations of isoprene, α-pinene and β-pinene, it is necessary to scientifically select urban green plant species, and more strict control measures should be taken to reduce the emission of α-pinene from industrial sources, such as artificial flavors and resins synthesis processes. 相似文献
85.
86.
介绍了江苏省环境空气监测网络的构成和环境空气质量趋势监测点的优选方法。通过对1993年-2000年全省13个少辖市60个监测点的SO2、TSP监测结果的相关指标统计,分别优选出代表全省及省辖市的环境空气质量趋势监测点12个和25个。 相似文献
87.
用100mL玻璃注射器采集气样,直接进入气相色谱仪,卤代烃经HP—101毛细管柱分离、ECD测定。方法检出限为0.007mg/m^3-0.05mg/m^3,相对标准偏差为3.4%-7.6%,加标回收率为94%-106%。 相似文献
88.
在对环境空气质量的监测中,有些城市存在着人工采样实验室测定和连续自动监测系统监测并行的情况。为考察这两种方法监测结果的异同,于夏季连续20d和冬季连续15d进行了对比监测。监测项目为SO2,NO2和PM10。在对比监测中采取了质量控制措施。对人工采样实验室测定进行了综合采样器流量校正,现场空白样和全程序平行样测定;在自动监测系统中,对SO2,NO2监测仪器作零点,标点校正,PM10监测仪作K0校正。对所测得的209个日均值进行了统计分析,结果表明:SO2,PM10两方面测定结果方差相同,NO2两种方法在冬夏两季方差间均有显著性差异;夏季SO2,PM10,冬季NO2两种方法监测结果一致;冬季SO2,PM10,夏季NO2两种方法监测结果有显著性差异;样品浓度水平及天气状况对两种方法测定结果的差异亦产生较大的影响。 相似文献
89.
潘晓英 《环境监测管理与技术》2002,14(5):21-22
为了解浦东新区建区以来的环境空气质量,浦东新区环境保护监测站对1994年-2001年环境空气中主要污染物监测结果进行了分析:SO2,NOx,TSP的质量浓度和分指数结果相比较,TSP占有最大权重,处于污染主导地位,其主要污染源为工业粉尘,烟尘,机动车排放的尾气,建筑施工及道路交通产生的尘污染。 相似文献
90.
Hao Zheng Jian Cheng Hung Chak Ho Baoli Zhu Zhen Ding Wencong Du Xin Wang Yang Yu Juan Fei Zhiwei Xu Jinyi Zhou Jie Yang 《Frontiers of Environmental Science & Engineering》2023,17(9):105