全文获取类型
收费全文 | 1130篇 |
免费 | 5篇 |
国内免费 | 9篇 |
专业分类
安全科学 | 20篇 |
废物处理 | 17篇 |
环保管理 | 80篇 |
综合类 | 649篇 |
基础理论 | 146篇 |
污染及防治 | 170篇 |
评价与监测 | 35篇 |
社会与环境 | 24篇 |
灾害及防治 | 3篇 |
出版年
2018年 | 14篇 |
2017年 | 16篇 |
2015年 | 22篇 |
2014年 | 19篇 |
2013年 | 40篇 |
2012年 | 20篇 |
2011年 | 27篇 |
2010年 | 33篇 |
2009年 | 27篇 |
2008年 | 30篇 |
2007年 | 36篇 |
2006年 | 25篇 |
2005年 | 22篇 |
2004年 | 17篇 |
2003年 | 21篇 |
2002年 | 22篇 |
2001年 | 16篇 |
2000年 | 13篇 |
1999年 | 30篇 |
1996年 | 10篇 |
1995年 | 12篇 |
1990年 | 10篇 |
1967年 | 13篇 |
1966年 | 14篇 |
1965年 | 12篇 |
1963年 | 13篇 |
1962年 | 9篇 |
1961年 | 16篇 |
1960年 | 9篇 |
1958年 | 12篇 |
1957年 | 10篇 |
1956年 | 12篇 |
1955年 | 19篇 |
1954年 | 14篇 |
1952年 | 9篇 |
1942年 | 10篇 |
1941年 | 10篇 |
1940年 | 10篇 |
1939年 | 15篇 |
1938年 | 14篇 |
1937年 | 17篇 |
1936年 | 14篇 |
1935年 | 11篇 |
1934年 | 15篇 |
1933年 | 12篇 |
1931年 | 10篇 |
1929年 | 12篇 |
1926年 | 9篇 |
1922年 | 9篇 |
1921年 | 9篇 |
排序方式: 共有1144条查询结果,搜索用时 0 毫秒
991.
992.
993.
994.
995.
996.
997.
998.
999.
1000.
K. Theo von der Trenck Joachim Ruf Manfred Flittner 《Environmental science and pollution research international》1994,1(4):253-261
The treatment of hazardous sites in Baden-Württemberg is based on three legal documents: the state waste disposal art (LAbfG, 1990), the assessment committee directive (KommissionsVO, 1990), and the guide values directive (UM & SM B-W, 1993). The guide values directive was commonly issued by the Ministry of Labor, Health and Social Affairs and the Ministry of the Environment of the state of Baden-Württemberg (UM & SM B-W, 1993) and contains a three-level hierarchy of numerical criteria and rules which serve as both screening levels during the investigation and as remediation objectives. The decision for the appropriate level of remediation is based on feasibility and environmental balance considerations. The levels are ordered as follows: ? Level 1 (Background-Values) On principle, all remediations have to be based first on background levels. In the case of lack of feasibility or negative environmental balance for level-1 objectives use-specific requirements are considered next. ? Level 2 (Assessment-Values for Worst Case Exposure Conditions) The generic requirements underlying level 2 afford appropriate protection for humans regarding the most sensitive uses of the environment. At least four resources are considered on this level: Ground-water as such and its use, the health of humans on contaminated sites, and soil with respect to growth and quality of plants. Barriers against migration of the contaminants, the effect of dilution, and abandonment of certain uses, etc., are not taken into consideration on level 2. ? Level 3 (Site-Specific Requirements) Lack of feasibility or a negative environmental balance of level-2 objectives lead to consideration of site-specific circumstances which may alleviate the requirements. With respect to groundwater, the distinction is again necessary between groundwater as a resource and the use of groundwater. On level 3 the guideline gives rules of how to derive site-specific remediation objectives for groundwater in the form of concentrations and fluxes of contaminants after taking into account barriers, dilution, and the abandonment of uses. The guideline is the only directive of its kind in the world that regulates both concentrations and fluxes of contaminants into groundwater. 相似文献