全文获取类型
收费全文 | 273篇 |
免费 | 3篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 4篇 |
环保管理 | 20篇 |
综合类 | 67篇 |
基础理论 | 77篇 |
污染及防治 | 68篇 |
评价与监测 | 22篇 |
社会与环境 | 14篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 3篇 |
2018年 | 5篇 |
2017年 | 10篇 |
2016年 | 9篇 |
2015年 | 15篇 |
2014年 | 14篇 |
2013年 | 18篇 |
2012年 | 14篇 |
2011年 | 18篇 |
2010年 | 12篇 |
2009年 | 14篇 |
2008年 | 15篇 |
2007年 | 19篇 |
2006年 | 11篇 |
2005年 | 9篇 |
2004年 | 11篇 |
2003年 | 7篇 |
2002年 | 6篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1999年 | 5篇 |
1998年 | 3篇 |
1997年 | 6篇 |
1996年 | 3篇 |
1995年 | 4篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1991年 | 3篇 |
1981年 | 2篇 |
1977年 | 1篇 |
1969年 | 1篇 |
1966年 | 1篇 |
1964年 | 1篇 |
1963年 | 1篇 |
1961年 | 1篇 |
1960年 | 3篇 |
1959年 | 3篇 |
1958年 | 2篇 |
1957年 | 1篇 |
1955年 | 2篇 |
1953年 | 1篇 |
1952年 | 1篇 |
1949年 | 1篇 |
1925年 | 1篇 |
排序方式: 共有277条查询结果,搜索用时 15 毫秒
71.
72.
73.
Stefan Gartiser Christoph Hafner Christoph Hercher Kerstin Kronenberger-Schäfer Albrecht Paschke 《Environmental science and pollution research international》2010,17(4):856-865
Background, aim and scope
The applicability of the Whole Effluent Assessment concept for the proof of compliance with the “best available techniques” has been analysed with paper mill wastewater from Germany by considering its persistency (P), potentially bio-accumulative substances (B) and toxicity (T). 相似文献74.
Baumann Matthias Israel Christoph Piquer-Rodríguez María Gavier-Pizarro Gregorio Volante José Norberto Kuemmerle Tobias 《Regional Environmental Change》2017,17(4):1179-1191
Regional Environmental Change - The dry forests of Latin America are among the most dynamic deforestation frontiers in the world and are important carbon and biodiversity reservoirs. Our knowledge... 相似文献
75.
76.
James N Wetzel 《Journal of Environmental Economics and Management》1977,4(3):239-246
The public provisions of free or below cost outdoor recreation sites has resulted in the use of various methods to evaluate the demand. One method is to use travel cost as a price proxy. However, this mechanism does not take into account problems raised by congestion. This paper shows that the use of the travel cost method will always underestimate the true benefits provided by recreation at a site because of the role of congestion. The results are important because they identify a source of bias in measuring benefits of outdoor recreation and suggest how it may be corrected. 相似文献
77.
The aim of this study was to determine whether or not Sb and other elements (Ni, Cu, Bi, Tl, and Hg) originating from Pb alloy (2-5 wt. % Sb) bullets become more soluble as a result of weathering and what mechanisms possibly control their solubility. Samples were taken from bank material behind the targets at seven Swiss shooting ranges. The samples were dried, sieved, analyzed, and subjected to leaching experiments. Total average concentrations of Sb ranged from 0.5 to 13.8 g kg(-1). In the leaching experiments, Sb was almost exclusively present in solution as the oxidized species Sb(V) in concentrations of up to 5 mg L(-1). The Ca mineral Ca[Sb(OH)6]2 is suggested to control dissolved Sb(V) concentrations in soils at high concentrations. Oxalate extractions suggested that approximately 50% of Sb [predominantly Sb(V)] in the <0.5-mm fraction was adsorbed to Fe (hydr)oxides and possibly other minerals, such as calcite, that are soluble at pH 2. However, it is possible that only a fraction of the oxalate-extractable Sb(V) is reversibly bound to mineral surfaces. It was concluded that the release of Sb is significant and considerably higher than the other elements under investigation and that the mechanisms controlling Sb mobility should be further investigated. 相似文献
78.
Levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) were determined in 30 Swiss cow's milk samples collected at dairy farms in the vicinity to point sources, in rural/alpine areas distant to known sources, and from tanks in large industrial milk processing plants. The contaminant concentrations in samples collected in 2001 were compared to data from analyses conducted in 1984 and 1990/1991 at the same sites. In 2001, the PCDD/F levels in milk from farms near point sources (0.63+/-0.26 ng I-TEQ/kg milk fat) are slightly but significantly higher in than milk from remote areas (0.36+/-0.09 ng I-TEQ/kg milk fat). Consumer milk collected at the processing plants had intermediary levels (0.51+/-0.19 ng I-TEQ/kg milk fat). However, milk in 2001 was significantly less contaminated than the samples collected in 1990/1991 and 1984. This trend is particularly pronounced near point sources but is also apparent in consumer milk and milk from remote areas. No geographical gradient in the atmospheric input of PCDD/F in Switzerland was found. The reduction in PCDD/F levels in dairy milk is paralleled by and correlated to the remediation of known PCDD/F emitting industries, as enforced by federal authorities. 相似文献
79.
Toxicity testing of heavy metals with theRhizobium-legume symbiosis: High sensitivity to cadmium and arsenic compounds 总被引:1,自引:0,他引:1
Heike Neumann Anne Bode-Kirchhoff Andrea Madeheim Astrid Wetzel 《Environmental science and pollution research international》1998,5(1):28-36
Legume root nodules are the site of biological nitrogen fixation in theRhizobium-legame symbiosis. Nodules are structures unique to this symbiosis and they are morphologically as well as physiologically distinct from other plant organs. Organic substances affecting the macro- or microsymbionts vitality, such as PAHs (Wetzel et al., 1991), reduce nodulation even before visible damage to the plant can be detected. We present data that the formation of nodules (nodulation) may also serve for ecotoxicological evaluation of heavy metals in different binding states. Tests were performed in petri dishes with alfalfa (lucerne) seedlings inoculated withRhizobium meliloti. Cultivation took place in growth cabinets with carefully standardized and documented growth conditions. Data from stressed plants was recorded after 14 days of cultivation on contaminated substrate. A dose responsive decrease in nodulation was found after application of cadmium acetate, cadmium iodide, cadmium chloride, sodium salts of arsenate and arsenite, arsenic pentoxide, and lead nitrate, whereas lead acetate showed no effect up to a concentration of 3 μM. The dose response curves were used to calculate EC10, EC50 and EC90 values. EC50 values for cadmium compounds range from 1.5 to9.5 pM. Testing different arsenic compounds results in EC50 from 2.6 to 20.1 μM. EC50 of lead nitrate is 2.2 μM. The sensitivity, reproducibility and reliability of this test system is discussed compared to established biotests. 相似文献
80.