全文获取类型
收费全文 | 272篇 |
免费 | 79篇 |
国内免费 | 86篇 |
专业分类
安全科学 | 23篇 |
废物处理 | 16篇 |
环保管理 | 21篇 |
综合类 | 177篇 |
基础理论 | 117篇 |
污染及防治 | 57篇 |
评价与监测 | 20篇 |
社会与环境 | 5篇 |
灾害及防治 | 1篇 |
出版年
2024年 | 2篇 |
2023年 | 3篇 |
2022年 | 11篇 |
2021年 | 8篇 |
2020年 | 8篇 |
2019年 | 3篇 |
2018年 | 55篇 |
2017年 | 14篇 |
2016年 | 16篇 |
2015年 | 17篇 |
2014年 | 18篇 |
2013年 | 33篇 |
2012年 | 21篇 |
2011年 | 11篇 |
2010年 | 18篇 |
2009年 | 29篇 |
2008年 | 11篇 |
2007年 | 20篇 |
2006年 | 19篇 |
2005年 | 19篇 |
2004年 | 17篇 |
2003年 | 18篇 |
2002年 | 11篇 |
2001年 | 7篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 7篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 1篇 |
排序方式: 共有437条查询结果,搜索用时 15 毫秒
431.
贫燃条件Ag-Rh/CeO_2-ZrO_2-Al_2O_3协同催化C_3H_6选择性还原NO的原位红外研究 总被引:1,自引:1,他引:0
将Ag-Rh浸渍到共沉淀法合成的Ce-Zr-Al上,制备出Ag(0.04)-Rh(x)/Ce0.5Zr0.5O2-75%Al2O3系列催化剂,采用BET比表面积、X射线衍射光谱(XRD)和原位漫反射傅里叶变换红外光谱(DRIFTS)对催化剂进行表征,并探讨催化剂在贫燃条件下选择性还原NO的活性和反应机理.结果表明,Ag-Rh双组分催化剂的活性较单组分Ag、Rh催化剂的高.Rh负载量为0.7%(质量分数)时,NO转化率达最佳(90.3%),且反应的起燃温度低、活性温度范围宽(300~500℃).DRIFTS结果显示,Rh的添加不仅有利于催化剂表面NO的吸附,而且能促进Ag催化生成关键反应中间体—CO—NH—,进而显著提高NO的转化率. 相似文献
432.
433.
434.
Hai Yan Xiaojing Yang Jian Chen Chunhua Yin Chengbin Xiao Hao Chen 《环境科学学报(英文版)》2011,23(7):1165-1170
Synergistic removal of aniline by carbon nanotubes and the enzymes of Delftia sp. XYJ6, a newly isolated bacterial strain for
biodegrading aniline, was investigated. It showed that biodegradation rate of aniline was increased with the augment of protein
concentration in cell-free extract of Delftia sp. XYJ6. The adsorption amount of aniline by multi-walled carbon nanotubes (MWCNTs)
was slightly higher than that by single-walled carbon nanotubes (SWCNTs), however the adsorption amount of protein of Delftia sp.
XYJ6 by MWCNTs was lower than that by SWCNTs. Much more amount of aniline could be removed by CE of Delftia sp. XYJ6 in
the presence of SWCNTs than MWCNTs, which indicated that an efficient reaction between aniline and enzymes of Delftia sp. XYJ6
on the surface of SWCNTs played a key role in the rapid enzymatic biodegradation of aniline. This study is not previously reported and
may be useful in basic research and the removal of aniline from wastewater. 相似文献
435.
Hong-Li Ding Hai-Tao Yu Xiao-dong Wang Chen-Feng Guo Bing Zheng Ying Xie Ting-Feng Yi 《绿色能源与环境(英文)》2022,7(1):53-65
SrLi2Ti6O14 (SLTO) coated with different amount of ZrO2 was successfully prepared. The as-obtained composites are stacked by a series of particles with a pure phase structure and a good crystallinity. Furthermore, ZrO2 coating not only enhances the structural stability of the materials but also facilitates the diffusion of lithium through the SEI film. As a result, the redox polarization was reduced, and the reversibility of the electrochemical reaction was enhanced. Particularly, SLTO-ZrO2-2 sample delivers a high initial lithiation capacity of 283.6 mA h g-1, and the values maintain at 251.7, 228.0, 207.4, 175.3, and 147.7 mA h g-1 at the current densities of 0.13, 0.26, 0.54, 1.31, and 2.62 A g-1, respectively. Our experiment also confirmed that SLTO materials coated with ZrO2 are suitable for high power density applications, and the lithiation specific energy efficiency of SLTO-ZrO2-2 is 200%as high as that of pure SLTO at a power density of 1257 W kg-1. 相似文献
436.
Wei Mao Lixun Zhang Tianye Wang Yichen Bai Yuntao Guan 《Frontiers of Environmental Science & Engineering》2021,15(4):52
437.
Fan Lu Tianyu Hu Shunyan Wei Liming Shao Pinjing He 《Frontiers of Environmental Science & Engineering》2021,15(3):45