全文获取类型
收费全文 | 11047篇 |
免费 | 98篇 |
国内免费 | 546篇 |
专业分类
安全科学 | 103篇 |
废物处理 | 833篇 |
环保管理 | 1310篇 |
综合类 | 1850篇 |
基础理论 | 3313篇 |
污染及防治 | 2128篇 |
评价与监测 | 1077篇 |
社会与环境 | 1008篇 |
灾害及防治 | 69篇 |
出版年
2024年 | 2篇 |
2023年 | 22篇 |
2022年 | 87篇 |
2021年 | 78篇 |
2020年 | 66篇 |
2019年 | 66篇 |
2018年 | 1537篇 |
2017年 | 1426篇 |
2016年 | 1260篇 |
2015年 | 217篇 |
2014年 | 116篇 |
2013年 | 149篇 |
2012年 | 574篇 |
2011年 | 1490篇 |
2010年 | 798篇 |
2009年 | 689篇 |
2008年 | 967篇 |
2007年 | 1313篇 |
2006年 | 79篇 |
2005年 | 69篇 |
2004年 | 70篇 |
2003年 | 106篇 |
2002年 | 153篇 |
2001年 | 56篇 |
2000年 | 48篇 |
1999年 | 38篇 |
1998年 | 35篇 |
1997年 | 33篇 |
1996年 | 22篇 |
1995年 | 26篇 |
1994年 | 23篇 |
1993年 | 18篇 |
1992年 | 14篇 |
1991年 | 9篇 |
1990年 | 2篇 |
1989年 | 6篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1984年 | 11篇 |
1983年 | 8篇 |
1982年 | 1篇 |
1978年 | 1篇 |
1935年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
农业气象干旱指标研究综述 总被引:16,自引:0,他引:16
干旱作为最严重的气象灾害之一,已经对我国社会经济和人民生活造成严重影响。结合农业干旱和气象干旱基本理论,对农业气象干旱的定义及指标作了较为详细的综述与评价,指出了不同指标的优点和缺点,对今后的研究方向进行了展望,为干旱的监测和评估及农业防灾减灾研究提供了方法和依据。 相似文献
73.
中国船舶机舱火灾研究现状 总被引:16,自引:1,他引:16
分析了船舶机舱失火的原因和机舱火灾的特点 ,对我国船舶机舱火灾的研究现状进行了综述 ,对机舱火灾的研究前景进行了展望 ,提出了机舱火灾基础研究和应用研究面临的主要课题 ,表达了船舶机舱火灾研究的重要意义。 相似文献
74.
75.
76.
Use of Microbial Community to Evaluate Performance of a Wetland System in Treating Pb/Zn Mine Drainage 总被引:2,自引:0,他引:2
The performance of a wetland system in treating lead (Pb)/zinc (Zn) mine drainage was evaluated by using the polyurethane
foam unit (PFU) microbial community (method), which has been adopted by China as a standardized procedure for monitoring water
quality. The wetland system consisted of four cells with three dominant plants: Typha latifolia, Phragmites australis and Paspalum distichum. Physicochemical characteristics [pH, EC, content of total suspended solid (TSS) and metals (Pb, Zn, Cd, and Cu)] and PFU
microbial community in water samples had been investigated from seven sampling sites. The results indicated that the concentrations
of Pb, Zn, Cd, Cu, and TSS in the mine drainage were gradually reduced from the inlet to the outlet of the wetland system
and 99%, 98%, 75%, 83%, and 68% of these metals and TSS respectively, had been reduced in concentration after the drainage
passed through the wetland system. A total of 105 protozoan species were identified, the number of protozoa species and the
diversity index (DI) gradually increased, while the heterotrophic index (HI) gradually decreased from the inlet to the outlet
of the wetland system. The results indicated that DI, HI, and total number species of protozoa could be used as biological
indicators indicating the improvement of water quality. 相似文献
77.
78.
Biochar physicochemical parameters as a result of feedstock material and pyrolysis temperature: predictable for the fate of biochar in soil? 总被引:1,自引:0,他引:1
79.
Nguyen Kim Nga Huynh Dang Chinh Phi Thi Thuy Hong Tran Quang Huy 《Journal of Polymers and the Environment》2017,25(2):146-155
This study aimed at finding effective strategies for high-performance removal of reactive blue 19 (RB19) dye from aqueous solution. Chitosan (CS) films had been prepared by using solvent casting with mild drying for this purpose. The CS films were characterized by X-ray diffraction, field-emission scanning electron microscopy, and Fourier transform infrared (FTIR) spectroscopy. The performance of RB19 removal using CS were evaluated by varying contact time, solution pH, initial dye concentration, and adsorbent dosage. Adsorption isotherms, kinetics, and desorption were investigated by batch experiments. Results showed that CS films exhibited the optimal adsorption performance for RB19 removal and high maximum adsorption capacities of RB19, which were 799 and 822.4 mg g?1 at 20 and 40 °C, respectively. Adsorption kinetic data were well described by the pseudo-second-order kinetic model. FTIR analyses further indicated that interactions between RB19 and the CS film occurred during adsorption. The CS films also exhibited satisfactory desorption of RB19 at about 80 % after 30 min of desorption at pH 11. Our study demonstrated that the CS films can be easily prepared and applied for effective removal of RB19 in treatment of wastewater. 相似文献
80.
Christian Mougin Agnès Bouchez Laurence Denaix Isabelle Lamy François Laurent Fabrice Martin-Laurent Michel Mench 《Environmental science and pollution research international》2016,23(4):2974-2976
The fifth meeting of INRA’s national network of ecotoxicologists took place on 25 to 27 November 2014 in Biarritz, France. The main aim of the meeting was to bring together ecotoxicologists from INRA and associated partners, providing them ample opportunity to share and discuss their latest scientific results as well as the national policy of research in ecotoxicology and to precise perspectives for the network. 相似文献