全文获取类型
收费全文 | 157篇 |
免费 | 20篇 |
国内免费 | 10篇 |
专业分类
安全科学 | 9篇 |
废物处理 | 2篇 |
环保管理 | 14篇 |
综合类 | 51篇 |
基础理论 | 8篇 |
污染及防治 | 20篇 |
评价与监测 | 78篇 |
社会与环境 | 4篇 |
灾害及防治 | 1篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 8篇 |
2020年 | 7篇 |
2019年 | 5篇 |
2018年 | 3篇 |
2017年 | 6篇 |
2016年 | 9篇 |
2015年 | 8篇 |
2014年 | 8篇 |
2013年 | 11篇 |
2012年 | 10篇 |
2011年 | 8篇 |
2010年 | 14篇 |
2009年 | 8篇 |
2008年 | 8篇 |
2007年 | 8篇 |
2006年 | 7篇 |
2005年 | 6篇 |
2004年 | 2篇 |
2003年 | 8篇 |
2002年 | 6篇 |
2001年 | 9篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1993年 | 3篇 |
1984年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有187条查询结果,搜索用时 312 毫秒
131.
Variation of particle number and mass concentration in various size ranges of ambient aerosols in Eastern Germany 总被引:1,自引:0,他引:1
Th. Tuch P. Brand H.E. Wichmann J. Heyder 《Atmospheric environment (Oxford, England : 1994)》1997,31(24):4193-4197
There is an ongoing debate on the question which size fraction of particles in ambient air may be responsible for short-term responses of the respiratory system as observed in several epidemiological studies. However, the available data on ambient particle concentrations in various size ranges are not sufficient to answer this question.Therefore, on 180 days during the winter 1991/92 daily mean size distributions of ambient particles were determined in. Erfurt, a city in Eastern Germany. In the range 0.01–0.3 μm particles were classified by an electrical mobility analyzer and in the range 0.1–2.5 μm by an optical particle counter. From the derived size distributions, number and mass concentrations were calculated.The mean number concentration over this period of time was governed by particles smaller than 0.1 μm (72%), whereas the mean mass concentration was governed by particles in the size range 0.1–0.5 pm (83%). The contribution of particles larger than 0.5 μm to the overall number concentration was negligible and so was the contribution of particles smaller than 0.1 μm to the overall mass concentration. Furthermore, total number and mass concentrations in the range 0.01–2.5 μm were poorly correlated.The results suggest that particles larger than 2.5 μm (or even larger than 0.5 μm) are rare in the European urban environment so that the inhalation of these particles is probably not relevant for human health. Since particle number and mass concentrations can be considered poorly correlated variables, more insight into health-related aspects of particulate air pollution will be obtained by correlating respiratory responses with mass and number concentrations of ambient particles below 0.5 μm. 相似文献
132.
南京市国控环境空气监测网络优化 总被引:1,自引:1,他引:1
对南京市现有的国控环境空气监测网络现状进行了分析,指出了其存在的问题,提出了环境空气监测网络优化方案. 相似文献
133.
在沈阳市大气污染物申报登记和分析评价的基础上,提出了沈阳市改善环境空气质量的对策,旨在为领导决策提供依据. 相似文献
134.
Gang Huang Zhaoxiong Yan Shuyuan Liu Tingting Luo Liang An Zhihua Xu 《环境科学学报(英文版)》2020,32(1):173-183
Efficient removal of formaldehyde from indoor environments is of significance for human health.In this work,a typical binary transition metal oxide that could provide various oxidation states,β-NiMoO_4,was employed as a support to immobilize the active Pt component(Pt/NiMoO_4) for catalytic formaldehyde elimination at low ambient temperature(15℃).The results showed that the hydrothermal preparation temperature and time had a noticeable impact on the morphology and catalytic activity of the samples.The catalyst prepared with hydrothermal temperature of 150℃ for 4 hr(Pt-150-4) exhibited superior catalytic activity and stability mainly due to its distinctly porous structure,relative abundance of adsorbed surface hydroxyls/water,and high oxidation ability,which resulted from the interaction of Pt with Ni and Mo of the bimetallic NiMoO_4 support.Our results might shed light on the rational design of multifunctional catalysts for removal of indoor air pollutants at low ambient temperature. 相似文献
135.
136.
Chao Liu Hancheng Dai Lin Zhang Changchun Feng 《Frontiers of Environmental Science & Engineering》2019,13(5):70
137.
Ali Talib Arif Christoph Maschowski Polla Khanaqa Patxi Garra Manuel Garcia-Käufer Nadja Wingert 《毒物与环境化学》2013,95(4):373-394
AbstractHigh urban atmospheric pollution is caused by economic and industrial growth, especially in developing countries. The objective of this study was to assess possible relationships between in vitro effects on human alveolar epithelial cells of source-related dust types collected at Sulaimani City (Iraq), and to determine their mineralogical and chemical composition. A passive sampler was used to collect dust particles at a rural, an industrial and an urban sampling site during July and August 2014. The samples were size-fractionated by a low-pressure impactor to obtain respirable dust with aerodynamic diameters of less than 10?µm. The dust was mainly composed of quartz and calcite. Chrysotile fibers (white asbestos) were also found at the urban site. Dust from the industrial and urban sites triggered cytotoxic and genotoxic effects in the cells, whereas only minor effects were observed for the sample from the rural site. 相似文献
138.
用玻璃纤维滤纸采集工作场所空气中的草铵膦,经Metrosep A Supp 5-150型阴离子色谱柱分离,以1.92mmol/L碳酸钠-0.60mmol/L碳酸氢钠混合溶液为流动相,用离子色谱法测定。该方法在0mg/L~1.04mg/L范围内线性良好,方法检出限为0.012mg/L,按采集30 L空气计算,最低检出值为0.004mg/m3。空白玻璃纤维滤纸的加标回收率为93.7%~102%,标准溶液6次测定结果的RSD为0.8%~4.3%。 相似文献
139.
开封市声环境质量状况及对策 总被引:1,自引:0,他引:1
以开封市近年来对环境噪声的监测资料,分析了声环境质量状况,并结合污染现状提出了防治对策。 相似文献
140.