全文获取类型
收费全文 | 97篇 |
免费 | 0篇 |
国内免费 | 37篇 |
专业分类
安全科学 | 6篇 |
环保管理 | 9篇 |
综合类 | 79篇 |
基础理论 | 8篇 |
污染及防治 | 30篇 |
评价与监测 | 2篇 |
出版年
2023年 | 6篇 |
2022年 | 4篇 |
2021年 | 5篇 |
2020年 | 8篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 8篇 |
2014年 | 4篇 |
2013年 | 6篇 |
2012年 | 6篇 |
2011年 | 12篇 |
2010年 | 3篇 |
2009年 | 5篇 |
2008年 | 7篇 |
2007年 | 7篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 5篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 6篇 |
2000年 | 5篇 |
1999年 | 5篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1992年 | 1篇 |
排序方式: 共有134条查询结果,搜索用时 203 毫秒
41.
42.
Hussien Ahmed Abbas Rabab Ahmed Nasr Rose-Noëlle Vannier Tarek Samir Jamil 《环境科学学报(英文版)》2022,34(2):331-342
Nanosized Ba1- xBixFe1-xCuxO3(12–50 nm) with x values of 0, 0.01, 0.05, and 0.1 system was prepared using the Pechini method. Structural, morphological, surface and optical characterizations were performed for the prepared samples. Cubic phase was the predominant phase for the undoped BaFeO3 and Bi and Cu co-doped BaFeO3 samples. Minor phases of monoclinic Ba2Fe2O5, orthorhombic BaFe 相似文献
43.
44.
45.
钙钛矿CaFeO_3光催化降解大红染料废水性能的研究 总被引:1,自引:0,他引:1
用柠檬酸络合法制备钙钛矿型复合氧化物CaFeO3,并以其为光催化剂对水溶性染料进行光催化降解实验。讨论了光催化反应时间、催化剂投加量、光照强度、pH值、以及外加氧化剂(H2O2)等因素对光催化活性的影响。实验结果表明:在催化剂投加量0.4g,降解时间180min,pH值2,光照强度200W,H2O2的投加量5mL时,大红染料的降解率可达99.83%。 相似文献
46.
47.
采用溶胶-凝胶法制备了二氧化钛负载于天然麦饭石表面热处理后得到复合光催化剂TiO2/麦饭石,并通过N2吸附-脱附、XRD及IR对其进行表征。探讨了以天然麦饭石为载体制备具有较高光催化活性的负载型TiO2/天然麦饭石复合物的各种影响因素:焙烧温度,加投量,pH值等。研究结果表明:200℃焙烧条件下TiO2/麦饭石复合物具有最大的光催化活性,达到了纯TiO2的光催化效果:对罗丹明B脱色率随着光催化剂增多而增大;对罗丹明B在pH值7~9时具有最大的降解率,开拓和优化TiO2光催化效能的新途径。 相似文献
48.
Arzu HatipoĞlu 《毒物与环境化学》2013,95(3):147-162
The kinetics of the photocatalytic degradation of 10 different dichlorophenols and dichloroanilines have been investigated experimentally and theoretically. With the intention of finding certain molecular indices in order to determine the degradation rates of aromatic pollutants, geometry optimizations of the compounds have been performed with the semiempirical PM3 method. The molecular orbital calculations have been carried out by an SCF method using the RHF formalism. The correlations between the apparent first-order rate constants and the calculated molecular properties of the compounds have been examined. Four different structure–activity relationships have been developed expressing the logarithms of the rate constants in terms of the Hammett constants, electron densities of the substituents, the coefficients and the energies of the highest occupied molecular orbitals HOMO, and 1-octanol/water partition coefficients log?K OW. 相似文献
49.
Combining the use of photocatalysts with cementitious materials is an important development in the field of photocatalytic air pollution mitigation. This paper presents the results of a systematic study on assessing the effectiveness of pollutant degradation by concrete surface layers that incorporate a photocatalytic material – Titanium Dioxide. The photocatalytic activity of the concrete samples was determined by photocatalytic oxidation of nitric oxide (NO) in the laboratory. Recycled glass cullets, derived from crushed waste beverage bottles, were used to replace sand in preparing the concrete surface layers. Factors, which may affect the pollutant removal performance of the concrete layers including glass color, aggregate size and curing age, were investigated. The results show a significant enhancement of the photocatalytic activity due to the use of glass cullets as aggregates in the concrete layers. The samples fabricated with clear glass cullets exhibited threefold NO removal efficiency compared to the samples fabricated with river sand. The light transmittance property of glass was postulated to account for the efficiency improvement, which was confirmed by a separate simulation study. But the influence of the size of glass cullets was not evident. In addition, the photocatalytic activity of concrete surface layers decreased with curing age, showing a loss of 20% photocatalytic activity after 56-day curing. 相似文献
50.
苯甲酸类物质的光催化降解及其QSAR 总被引:8,自引:0,他引:8
研究了13种苯甲酸类化合物在固定膜平板型反应器中的光催化降解。首先用紫外辐射法将粉末二氧化钛固定在平板上;并研究了苯甲酸化合物在此平板上的光催化降解,考察了固定催伦剂下污染物的降解动力学,以及不同取代基团和取代位置对光降解速率的定性影响;最后探讨了苯甲酸物质光降解速率与其结构的定量关系。 相似文献