全文获取类型
收费全文 | 5419篇 |
免费 | 423篇 |
国内免费 | 1280篇 |
专业分类
安全科学 | 591篇 |
废物处理 | 667篇 |
环保管理 | 1023篇 |
综合类 | 3164篇 |
基础理论 | 396篇 |
环境理论 | 2篇 |
污染及防治 | 868篇 |
评价与监测 | 235篇 |
社会与环境 | 137篇 |
灾害及防治 | 39篇 |
出版年
2024年 | 14篇 |
2023年 | 100篇 |
2022年 | 143篇 |
2021年 | 185篇 |
2020年 | 196篇 |
2019年 | 131篇 |
2018年 | 163篇 |
2017年 | 237篇 |
2016年 | 287篇 |
2015年 | 244篇 |
2014年 | 442篇 |
2013年 | 411篇 |
2012年 | 424篇 |
2011年 | 433篇 |
2010年 | 279篇 |
2009年 | 338篇 |
2008年 | 256篇 |
2007年 | 349篇 |
2006年 | 390篇 |
2005年 | 297篇 |
2004年 | 246篇 |
2003年 | 263篇 |
2002年 | 210篇 |
2001年 | 194篇 |
2000年 | 191篇 |
1999年 | 142篇 |
1998年 | 106篇 |
1997年 | 85篇 |
1996年 | 81篇 |
1995年 | 65篇 |
1994年 | 53篇 |
1993年 | 43篇 |
1992年 | 30篇 |
1991年 | 17篇 |
1990年 | 14篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 9篇 |
1986年 | 3篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 6篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1973年 | 3篇 |
1971年 | 3篇 |
1970年 | 1篇 |
排序方式: 共有7122条查询结果,搜索用时 15 毫秒
1.
《环境科学学报(英文版)》2023,35(4):174-183
It is the key to control bio-derived dissolved organic matters (DOM) in order to reduce the effluent concentration of wastewater treatment, especially for waste leachate with high organic contaminants. In the present study, the anaerobic degradation of aerobically stabilized DOM was investigated with DOM substrate isolated through electrodialysis. The degradation of bio-derived DOM was confirmed by reduction of 15% of total organic carbon in 100 days. We characterized the molecular behavior of bio-derived DOM by coupling molecular and biological information analysis. Venn based Sankey diagram of mass features showed the transformation of bio-derived DOM mass features. Occurrence frequency analysis divided mass features into six categories so as to distinguish the fates of intermediate metabolites and persistent compounds. Reactivity continuum model and machine learning technologies realized the semi-quantitative determination on the kinetics of DOM mass features in the form of pseudo-first order, and confirmed the reduction of inert mass features. Furthermore, network analysis statistically establish relationship between DOM mass features and microbes to identify the active microbes that are able to utilize bio-derived DOM. This work confirmed the biological technology is still effective in controlling recalcitrant bio-derived DOM during wastewater treatment. 相似文献
2.
3.
4.
王军 《辽宁城乡环境科技》2005,25(5):53-56
感染性废气物对人们的身心健康有极大的威胁.然而从目前的实际情况来看,相当一部分是与一般城市生活垃圾混合在一起处理的情况较常见。鉴于上述情况.文中将欧美日发达国家对感染性废气物的收集.管理及处理情况给予介绍。 相似文献
5.
爆炸法处理废旧轮胎制造橡胶粉末技术及关键机理研究 总被引:6,自引:0,他引:6
主要介绍了利用爆炸法处理废旧轮胎制造橡胶粉末的技术 ;探讨了橡胶在爆炸作用下破坏的机理 ,爆炸法中橡胶变形速率与它的剪切模量和断裂韧性的关系 ;分析了利用直接爆炸法处理废旧轮胎的 3种实验结果 ,验证了对轮胎进行预处理的必要性 ,探讨了炸药用量的选择原则 相似文献
6.
7.
Influence of new town development on the urban heat island - The case of the Bundang area 总被引:3,自引:0,他引:3
SONG Young-bae 《环境科学学报(英文版)》2005,17(4):641-645
Five new towns have been developed around the Seoul metropolitan area since 1996. However, these new towns generate lots of traffic and related problems in the areas including those new towns and Seoul as a result of increases in population and a lack of ecological-self-sufficiency. Currently, construction of another new town is under deliberation, and what should be a major consider is the notion that the new town be located within a wide, green zone. Many studies have revealed that green space can play an important role in improving urban eco-meteorological capability and air quality. In order to analyze the urban heat island which will be created by the new urban development, and to investigate the local thermal environment and its negative effects caused by a change of land use type and urbanization, Landsat TM images were used for extraction of urban surface temperature according to changes of land use over the last 15 years. These data are analyzed together with digital land use and topographic information. As a study result, it was found the urban heat island of the study area from 198.5 to 1999 rapidly developed which showed a difference of mean temperature above 2.0. Before the Bundang new town construction the temperature of the residential area was the same as a forest, but during the new town construction in 1991 analysis revealed the creation of an urban heat island. The temperature of a forest whose size is over 50% of the investigation area was lowest, and thus the presence of a forest is believed to have a direct cooling effect on the urban environment and its surroundings. The mean temperature of the residential and commercial areas in the study was found to be 4.5 higher than the forest, and therefore this part of land use is believed to be the main factor causing the temperature increase of the urban heat island. 相似文献
8.
利用独特的设备和水泥窑的工艺特点,用废物代替水泥生产中的原材料,合理处置危险废物,使环境治理和循环经济达到有效的结合,是一项废物处理和资源化的新途径,是水泥生产企业可持续发展的方向之一,具有广阔的发展前景。 相似文献
9.
旋流板塔及其在废气处理中的应用 总被引:4,自引:2,他引:4
简述了旋流板塔原理、结构、设计参数,并列举了该塔在NOx、有机废气、HCl、燃油炉烟等方面治理工程应用实例。 相似文献
10.
对勐海县景真糖厂原料基地和各生产工段的生产状况进行了综合评价分析,探明了该糖厂生产中产生的"三废"排放特征,存在问题以及环境经济状况,提出了建立循环发展体系,进一步提高环境经济效益的措施建议。 相似文献