全文获取类型
收费全文 | 421篇 |
免费 | 3篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 30篇 |
环保管理 | 20篇 |
综合类 | 98篇 |
基础理论 | 70篇 |
污染及防治 | 131篇 |
评价与监测 | 55篇 |
社会与环境 | 20篇 |
出版年
2023年 | 6篇 |
2022年 | 15篇 |
2021年 | 9篇 |
2019年 | 6篇 |
2018年 | 18篇 |
2017年 | 8篇 |
2016年 | 14篇 |
2015年 | 10篇 |
2014年 | 23篇 |
2013年 | 33篇 |
2012年 | 32篇 |
2011年 | 30篇 |
2010年 | 21篇 |
2009年 | 22篇 |
2008年 | 14篇 |
2007年 | 15篇 |
2006年 | 11篇 |
2005年 | 18篇 |
2004年 | 16篇 |
2003年 | 12篇 |
2002年 | 6篇 |
2001年 | 8篇 |
2000年 | 3篇 |
1999年 | 3篇 |
1996年 | 2篇 |
1995年 | 5篇 |
1990年 | 3篇 |
1988年 | 4篇 |
1978年 | 2篇 |
1973年 | 1篇 |
1971年 | 1篇 |
1970年 | 2篇 |
1969年 | 1篇 |
1967年 | 3篇 |
1966年 | 1篇 |
1965年 | 4篇 |
1964年 | 4篇 |
1962年 | 1篇 |
1961年 | 1篇 |
1959年 | 5篇 |
1958年 | 6篇 |
1957年 | 2篇 |
1956年 | 4篇 |
1955年 | 5篇 |
1932年 | 1篇 |
1929年 | 2篇 |
1928年 | 1篇 |
1927年 | 1篇 |
1926年 | 2篇 |
1925年 | 1篇 |
排序方式: 共有426条查询结果,搜索用时 0 毫秒
1.
Pacáková V Pockeviciute D Armalis S Stulík K Li J Veselý J 《Journal of environmental monitoring : JEM》2000,2(2):187-191
Experiments were carried out to monitor the equilibrium distribution of lead, cadmium and copper between an aqueous phase modelling natural water and a solid phase modelling natural sediment, under varying conditions. The aqueous phase was analysed using ETAAS and differential pulse anodic stripping voltammetry (DPASV), whereas XRD and FTIR were used to study the solid phase. Sorption isotherms at constant pH were measured. Conditional distribution constants were calculated as functions of the pH, the time of equilibration and the amount of solid material. The results obtained stress the need for standardization of the approaches to the study of water-sediment interactions in order to be able to evaluate and compare the extensive data from field measurements and to predict these interactions. 相似文献
2.
3.
4.
5.
6.
7.
8.
9.
Jan Kupec Kateřina Charvátová Milan Navrátil Vojtěch Křesálek Martina Křesálková 《Journal of Polymers and the Environment》2003,11(3):93-100
Most native polymers used in processing and application technologies are admittedly disposable from the environment in a biologic manner, but products possess low mechanical strength. One of the paths to increasing this attribute (if feasible) is their cross-linking, which may, however, affect their readiness to biodegradation. In the presented work this condition was observed on the example of waste protein (Hykol B) cross-linking by means of glutardialdehyde and glyoxal. Degree and course of cross-linking were determined through impedance spectroscopy. The objective of this work also was to obtain data for constructing a sensor capable of following the cross-linking course in real time, for potential industrial application of Hykol in continuous production. Impedance spectroscopy proved to be applicable even to this kind of material marked by considerable water content and exhibiting relatively high electric conductivity; so far it had been used only for materials of low conductivity. An aqueous environment inoculated with digested anaerobic sludge from a municipal wastewater treatment plant was selected for modeling anaerobic conditions. The relation was studied between cross-linking degree given by content of cross-linking agent (determined by impedance spectroscopy) and biodegradation degree under anaerobic conditions. It was confirmed that network density as given by quantity of added agent not only reduced breakdown degree but also slowed the course of the process. This fact is particularly obvious with cross-linking by means of glyoxal; network density is thus dependent on type of employed substance, which affect type and structure of created network. That not merely forms an obstacle during polymer swelling and dissolution but also prevents access of bacteria to source of metabolized organic carbon. 相似文献
10.
Jiří Pšeja Josef Hrnčiřík Jan Kupec Hana Charvátová Petr Hruzík Michael Tupý 《Journal of Polymers and the Environment》2006,14(3):231-237
Biodegradability testing was performed in an aqueous environment under anaerobic conditions after inoculation with digested sludge from municipal wastewater treatment plant. In cross-linking with 1,2:3,4-diepoxybutane in limits 0.8–9.1% weight, biodegradability degree decreased from 76.8 to 62.2%; when 1,2:7,8 diepoxyoctane in quantities 1.1–13.2% weight was used, biodegradability degree dropped more prominently – from 72.3 to 22.8%. There is obviously a direct connection between growing cross-link degree (assessed by so-called fixation index) and decreasing readiness to biodegradation, apparently owing to build-up of a network forming an obstacle to access of micro-organisms and enzymes. 相似文献