全文获取类型
收费全文 | 439篇 |
免费 | 7篇 |
国内免费 | 8篇 |
专业分类
安全科学 | 78篇 |
废物处理 | 15篇 |
环保管理 | 82篇 |
综合类 | 156篇 |
基础理论 | 24篇 |
污染及防治 | 66篇 |
评价与监测 | 21篇 |
社会与环境 | 7篇 |
灾害及防治 | 5篇 |
出版年
2023年 | 8篇 |
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 13篇 |
2019年 | 4篇 |
2017年 | 5篇 |
2016年 | 9篇 |
2015年 | 11篇 |
2014年 | 13篇 |
2013年 | 32篇 |
2012年 | 13篇 |
2011年 | 20篇 |
2010年 | 17篇 |
2009年 | 19篇 |
2008年 | 19篇 |
2007年 | 19篇 |
2006年 | 30篇 |
2005年 | 13篇 |
2004年 | 21篇 |
2003年 | 38篇 |
2002年 | 17篇 |
2001年 | 15篇 |
2000年 | 20篇 |
1999年 | 25篇 |
1998年 | 9篇 |
1997年 | 9篇 |
1996年 | 8篇 |
1995年 | 4篇 |
1994年 | 17篇 |
1993年 | 8篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1981年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有454条查询结果,搜索用时 15 毫秒
291.
The effects of Orimulsion and Fuel Oil #6 on the hatching success of copepod resting eggs in the seabed of Tampa Bay,Florida 总被引:3,自引:0,他引:3
A 3-month microcosm study was conducted to observe the potential effects of two fuels, Orimulsion and Fuel Oil #6, on the hatching success of copepod resting eggs in the seabed of Tampa Bay, Florida. Microcosms were dosed with one of five hydrocarbon treatments via hydrocarbon-coated sand and compared with controls. Acartia tonsa eggs were nonviable in all treatments after only a few weeks of incubation, as evidenced by a marked decline in the abundance of nauplii. However, there was no evidence that exposure to simulated spills of 700 or 7000 ppm of either fuel led to significant increases in resting egg mortality as compared with controls. The results further indicate that, regardless of environmental conditions, resting eggs of A. tonsa do not remain viable in the sediment for extended periods of time. 相似文献
292.
Under the United States Oil Pollution Act of 1990, natural resource trustees are charged with assessing natural resource impacts
due to an oil spill and determining the type and amount of natural resource restoration that will compensate the public for
the impacts. Habitat equivalency analysis is a technique through which the impacts due to the spill and the benefits of restoration
are quantified; both are quantified as habitat resources and associated ecological services. The goal of the analysis is to
determine the amount of restoration such that the services lost are offset by services provided by restoration.
In this paper, we first describe the habitat equivalency analysis framework. We then present an oil spill case from coastal
Louisiana, USA, where the framework was applied to quantify resource impacts and determine the scale of restoration. In the
Louisiana case, the trustees assessed impacts for oiled salt marsh and direct mortality to finfish, shellfish, and birds.
The restoration project required planting salt-marsh vegetation in dredge material that was deposited on a barrier island.
Using the habitat equivalency analysis framework, it was determined that 7.5 ha of the dredge platform should be planted as
salt marsh. The planted hectares will benefit another 15.9 ha through vegetative spreading resulting in a total of 23.4 ha
that will be enhanced or restored as compensation for the natural resource impacts. 相似文献
293.
硫化亚铁引发储油罐火灾危险性的研究 总被引:10,自引:1,他引:9
笔者通过模拟储油罐中硫化亚铁的生成方式 ,分析和研究了硫化氢气体与氢氧化铁、三氧化二铁和四氧化三铁反应 ,生成的硫化亚铁的氧化倾向性 ,并采用自然氧化绝热装置 ,测定了硫化亚铁的温度变化曲线。实验研究结果表明 ,不同方式生成的硫化亚铁 ,其氧化性不同 ,自燃性也不同 ,均有较显著差异。硫化亚铁的温度变化曲线表明 ,氧化反应随着时间增加 ,其他应进行得越来越快 ,将会造成热量的聚集 ,使油品温度快速上升 ,导致油品自燃和储罐发生着火爆炸。实验研究证明 ,硫化亚铁氧化反应放出热量是构成油罐着火危险性的最大因素。 相似文献
294.
Can China control the side effects of motor vehicle growth? 总被引:2,自引:0,他引:2
Michael P. Walsh 《Natural resources forum》2007,31(1):21-34
Motor vehicle growth in China is the fastest in the world. This is placing great strain on the urban environment and causing a rapid increase in oil imports and motor vehicle carbon dioxide emissions. To deal with the environmental and health effects of air pollution, China has adopted a strong motor vehicle pollution control programme and imposed limits on fuel consumption of new light duty vehicles. The article will review these problems and programmes. Special focus will be given to the need to reduce sulphur levels in both gasoline and diesel fuel. 相似文献
295.
296.
Decision Support System for Managing Oil Spill Events 总被引:3,自引:0,他引:3
The Mediterranean environment is exposed to various hazards, including oil spills, forest fires, and floods, making the development of a decision support system (DSS) for emergency management an objective of utmost importance. The present work presents a complete DSS for managing marine pollution events caused by oil spills. The system provides all the necessary tools for early detection of oil-spills from satellite images, monitoring of their evolution, estimation of the accident consequences and provision of support to responsible Public Authorities during clean-up operations. The heart of the system is an image processing–geographic information system and other assistant individual software tools that perform oil spill evolution simulation and all other necessary numerical calculations as well as cartographic and reporting tasks related to a specific management of the oil spill event. The cartographic information is derived from the extant general maps representing detailed information concerning several regional environmental and land-cover characteristics as well as financial activities of the application area. Early notification of the authorities with up-to-date accurate information on the position and evolution of the oil spill, combined with the detailed coastal maps, is of paramount importance for emergency assessment and effective clean-up operations that would prevent environmental hazard. An application was developed for the Region of Crete, an area particularly vulnerable to oil spills due to its location, ecological characteristics, and local economic activities. 相似文献
297.
The high degree of physical disturbance associated with conventional response options to oil spills in wetlands is driving
the investigation of alternative cleanup methodologies. In March 1995, a spill of gas condensate in a brackish marsh at Rockefeller
Wildlife Refuge in southwestern Louisiana was remediated through the use of in situ burning. An assessment of vegetation recovery
was initiated in three treatment marshes: (1) oil-impacted and burned, (2) oil impacted and unburned, and (3) a nonoiled unburned
reference. We compared percent cover, stem density, and biomass in the treatment marshes to define ecological recovery of
the marsh vegetation and soil hydrocarbon content to determine the efficacy of in situ burning as a cleanup technique. Burning
led to a rapid decrease in soil hydrocarbon concentrations in the impacted-and-burned marsh to background levels by the end
of the first growing season. Although a management fire accidentally burned the oil-impacted-and-unburned and reference marshes
in December 1995, stem density, live biomass, and total percent cover values in the oil-impacted-and-burned marsh were equivalent
to those in the other treatment marshes after three years. In addition, plant community composition within the oil-impacted-and-burned
marsh was similar to the codominant mix of the grasses Distichlis spicata (salt grass) and Spartina patens (wire grass) characteristic of the surrounding marsh after the same time period. Rapid recovery of the oil-impacted-and-unburned
marsh was likely due to lower initial hydrocarbon exposure. Water levels inundating the soil surface of this grass-dominated
marsh and the timing of the in situ burn early in the growing season were important factors contributing to the rapid recovery
of this wetland. The results of this in situ burn evaluation support the conclusion that burning, under the proper conditions,
can be relied upon as an effective cleanup response to hydrocarbon spills in herbaceous wetlands. 相似文献
298.
新型油水分离器在油田污水处理中的应用实验 总被引:4,自引:0,他引:4
叙述了一种新型油水分离器--奥地利费雷公司的波纹板式重力加速聚集型油水分离器的工作原理,及其在国内几个油田的中试试验情况,试验结果表明,该油水分离器处理效果相当明显,除油率平均达94.59%,具有相当的经济、社会和环境效益。 相似文献
299.
灰色拓扑分析方法在海上溢油趋势预测上的应用 总被引:5,自引:0,他引:5
依据1973~1996 年间中国海域船舶溢油的历史数据,利用灰色系统理论的灰色拓扑分析方法,以10 个不同的溢油总量作为分析采用的阈值,建立相应的GM(1,1)分析模型,对未来的溢油趋势进行预测分析。分析的结果显示未来年份的溢油量较1996 年以前的溢油量要高,表明未来的溢油趋势仍不可乐观。必须加强以大溢油量(单次溢油量>50 000 kg) 溢油事件的防止工作。 相似文献
300.
大连港3号排污口对海水的油污染及其扩散分析 总被引:1,自引:0,他引:1
本文通过1年的监测数据,初步分析季大连港3号排污口对附近海水的油污染状况,海水的油浓度与油类排放量的关系,以及油污染物迁移扩散的规律。 相似文献