全文获取类型
收费全文 | 200篇 |
免费 | 6篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 10篇 |
废物处理 | 21篇 |
环保管理 | 16篇 |
综合类 | 34篇 |
基础理论 | 50篇 |
污染及防治 | 39篇 |
评价与监测 | 24篇 |
社会与环境 | 13篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 3篇 |
2022年 | 4篇 |
2021年 | 2篇 |
2020年 | 1篇 |
2019年 | 5篇 |
2018年 | 9篇 |
2017年 | 9篇 |
2016年 | 9篇 |
2015年 | 5篇 |
2014年 | 10篇 |
2013年 | 15篇 |
2012年 | 16篇 |
2011年 | 15篇 |
2010年 | 12篇 |
2009年 | 11篇 |
2008年 | 5篇 |
2007年 | 13篇 |
2006年 | 10篇 |
2005年 | 9篇 |
2004年 | 6篇 |
2003年 | 8篇 |
2002年 | 5篇 |
2001年 | 3篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1996年 | 1篇 |
1995年 | 7篇 |
1994年 | 2篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1982年 | 1篇 |
1974年 | 1篇 |
1958年 | 1篇 |
排序方式: 共有208条查询结果,搜索用时 468 毫秒
111.
The phytotoxicity of olive-mill wastewater (OMW) has been suggested to be mainly due to its phenolic components. This study investigated the impact of three different low-cost dephenolization treatments on the wastewater phytotoxicity. To this aim, germinability of maize (Zea mays L.) seeds sown on a sandy-loamy soil which had been spread with different volumes (from 40 to 160m(3)ha(-1)) of either biologically-treated OMW or relative incubation control was determined. Biological treatments included either Panus tigrinus liquid cultures or incubation with commercial laccase (1UIml(-1)) or an innovative sequential combination of laccase and P. tigrinus cultures. All treatments markedly reduced phytotoxicity and promising results were obtained with commercial laccase. In fact, germinability and mean germination times in soil spread with laccase-treated OMW, did not significantly differ from those observed in soil irrigated with tap water (control) up to OMW volumes of 120m(3)ha(-1). Although the highest phenol reduction (ca. 81%) was obtained by the sequential use of laccase and P. tigrinus, the feasibility of the enzyme treatment is undoubtedly more convincing under the technological point of view. 相似文献
112.
Marinari S Calfapietra C De Angelis P Mugnozza GS Grego S 《Environmental pollution (Barking, Essex : 1987)》2007,147(3):507-515
The experiment was carried out on a short rotation coppice culture of poplars (POP-EUROFACE, Central Italy), growing in a free air carbon dioxide enriched atmosphere (FACE). The specific objective of this work was to study whether elevated CO(2) and fertilization (two CO(2) treatments, elevated CO(2) and control, two N fertilization treatments, fertilized and unfertilized), as well as the interaction between treatments caused an unbalanced nutritional status of leaves in three poplar species (P. x euramericana, P. nigra and P. alba). Finally, we discuss the ecological implications of a possible change in foliar nutrients concentration. CO(2) enrichment reduced foliar nitrogen and increased the concentration of magnesium; whereas nitrogen fertilization had opposite effects on leaf nitrogen and magnesium concentrations. Moreover, the interaction between elevated CO(2) and N fertilization amplified some element unbalances such as the K/N-ratio. 相似文献
113.
Environmental Fluid Mechanics - In the present paper we study buoyant (plume) and non-buoyant (jet) fluid injection in a neutrally stratified uniform cross-flow. Both cases are of practical... 相似文献
114.
Pharmaceuticals in the Environment in Italy: Causes, Occurrence, Effects and Control 总被引:1,自引:1,他引:0
Zuccato E Castiglioni S Fanelli R Reitano G Bagnati R Chiabrando C Pomati F Rossetti C Calamari D 《Environmental science and pollution research international》2006,13(1):15-21
- DOI: http://dx.doi.org/10.1065/espr2006.01.004
Background, Aim and Scope Environmental contamination by pharmaceuticals is an emerging issue. Until recently, information on medicinal substances
released into the environment was scant, but several studies have now been published. Data are, however, usually scattered
and a systematic approach to this subject is generally lacking. Moreover, because of differences in the prevalence of diseases,
treatment habits and options, or simply for market reasons, the pollution profile can differ significantly in different countries.
The aim of this work is to review the papers dealing with environmental contamination by pharmaceuticals in Italy, with the
aim of providing a comprehensive view on a national scale.
Methods Papers related to environmental contamination by pharmaceuticals in Italy were reviewed, in order to offer a comprehensive
view of this subject. Topics included analysis, occurrence, monitoring, modelling, treatment, control of the emissions, and
ecotoxicological effects of pharmaceuticals in the environment.
Results and Conclusion The literature suggests that pharmaceuticals are widespread contaminants, entering the environment from a myriad of scattered
points. Patients, in case of drugs for human use, or animals for veterinary drugs, are the main sources of contamination.
Pharmaceuticals can be ranked according to environmental loads, predicted by multiplying sales figures by the rate of metabolism
in man or animals. Priority pharmaceuticals, i.e. the molecules of concern for the environment, can be measured in waste and
surface water by liquid chromatography-tandem mass spectrometry, and the loads detected are generally comparable to the predicted
ones. Pharmaceuticals are designed to stimulate a response in humans and animals at low doses, with a very specific target,
so the implications for human health and the environment need to be assessed. In vitro and in vivo studies suggest that pharmaceutical
principles, taken singularly or in combinations, and concentrations close to those detected in the environment, may have ecotoxicological
effects. The sewage system is an important point in the control of contamination, but sewage treatment plants are not able
efficiently to abate a substantial part of water-borne pharmaceuticals. Several variables play a role, however, in the processes
of waste water treatment, and could be specifically adjusted to improve the efficiency of drug abatement, mitigating the potential
environmental hazards.
Recommendation and Perspective Pharmaceuticals in the environment are becoming a subject of global concern, with potential environmental consequences. Further
knowledge of the causes, occurrence and effects of drugs as environmental pollutants is necessary for a better understanding
of this ecological issue, as well as to improve abatement strategies, and to mitigate subtle environmental consequences. 相似文献
115.
IntroductionRecent years have witnessed a growing interest in improving bus safety operations worldwide. While in the United States buses are considered relatively safe, the number of bus accidents is far from being negligible, triggering the introduction of the Motor-coach Enhanced Safety Act of 2011.MethodThe current study investigates the underlying risk factors of bus accident severity in the United States by estimating a generalized ordered logit model. Data for the analysis are retrieved from the General Estimates System (GES) database for the years 2005–2009.ResultsResults show that accident severity increases: (i) for young bus drivers under the age of 25; (ii) for drivers beyond the age of 55, and most prominently for drivers over 65 years old; (iii) for female drivers; (iv) for very high (over 65 mph) and very low (under 20 mph) speed limits; (v) at intersections; (vi) because of inattentive and risky driving. 相似文献
116.
117.
Moreno Di Marco Stuart H. M. Butchart Piero Visconti Graeme M. Buchanan Gentile F. Ficetola Carlo Rondinini 《Conservation biology》2016,30(1):189-195
After their failure to achieve a significant reduction in the global rate of biodiversity loss by 2010, world governments adopted 20 new ambitious Aichi biodiversity targets to be met by 2020. Efforts to achieve one particular target can contribute to achieving others, but different targets may sometimes require conflicting solutions. Consequently, lack of strategic thinking might result, once again, in a failure to achieve global commitments to biodiversity conservation. We illustrate this dilemma by focusing on Aichi Target 11. This target requires an expansion of terrestrial protected area coverage, which could also contribute to reducing the loss of natural habitats (Target 5), reducing human‐induced species decline and extinction (Target 12), and maintaining global carbon stocks (Target 15). We considered the potential impact of expanding protected areas to mitigate global deforestation and the consequences for the distribution of suitable habitat for >10,000 species of forest vertebrates (amphibians, birds, and mammals). We first identified places where deforestation might have the highest impact on remaining forests and then identified places where deforestation might have the highest impact on forest vertebrates (considering aggregate suitable habitat for species). Expanding protected areas toward locations with the highest deforestation rates (Target 5) or the highest potential loss of aggregate species’ suitable habitat (Target 12) resulted in partially different protected area network configurations (overlapping with each other by about 73%). Moreover, the latter approach contributed to safeguarding about 30% more global carbon stocks than the former. Further investigation of synergies and trade‐offs between targets would shed light on these and other complex interactions, such as the interaction between reducing overexploitation of natural resources (Targets 6, 7), controlling invasive alien species (Target 9), and preventing extinctions of native species (Target 12). Synergies between targets must be identified and secured soon and trade‐offs must be minimized before the options for co‐benefits are reduced by human pressures. 相似文献
118.
A positive surge is a unsteady open channel flow resulting from the rapid rise of the free-surface. The phenomenon may be
observed in water supply canals and channels as well as in some estuaries during spring tidal conditions. The formation and
development of positive surges can be predicted using the method of characteristics and shallow water equations. The paper
is the second part of a study presenting the results from new experimental investigations conducted in a large rectangular
channel. Detailed unsteady velocity measurements were performed with a high temporal resolution using acoustic Doppler velocimetry
and non-intrusive free-surface measurement devices. Several experiments were conducted with the same initial discharge (Q = 0.060 m3/s) and six different gate openings after closure resulting in both non-breaking undular and breaking bores. A comparison
between main features of the undular surges with literature theories demonstrated that the experimental data were mostly in
agreement with Andersen’s theory. The analysis of unsteady flow field including Reynolds stresses confirmed and extended previous
findings about positive surge hydrodynamics. 相似文献
119.
Francesco Vitali Simone Parmigiani Mentore Vaccari Carlo Collivignarelli 《Waste management (New York, N.Y.)》2013,33(12):2762-2770
In many rural contexts of the developing world, agricultural residues and the organic fraction of waste are often burned in open-air to clear the lands or just to dispose them. This is a common practice which generates uncontrolled emissions, while wasting a potential energy resource. This is the case of rice husk in the Logone Valley (Chad/Cameroon). In such a context household energy supply is a further critical issue. Modern liquid fuel use is limited and traditional solid fuels (mainly wood) are used for daily cooking in rudimentary devices like 3-stone fires, resulting in low efficiency fuel use, huge health impacts, increasing exploitation stress for the local natural resources. Rice husk may be an alternative fuel to wood for household energy supply. In order to recover such a biomass, the authors are testing a proper stove with an original design. Its lay-out (featuring a metal-net basket to contain the fuel and a chimney to force a natural air draft) allows a mix of combustion/gasification of the biomass occurring in a completely burning fire, appropriate for cooking tasks. According to results obtained with rigorous test protocols (Water Boiling Test), different lay-outs have been designed to improve the performance of the stove. Technical and economic issues have been addressed in the development of such a model; building materials have been chosen in order to guarantee a cost as low as possible, using locally available items. The feasibility of the introduction of the stove in the studied context was assessed through an economic model that keeps into account not only the technology and fuel costs, but also the energy performance. According to the model, the threshold for the trade-off of the stove is the use of rice husk to cover 10–15% of the household energy needs both with traditional fireplaces or with improved efficiency cookstoves. The use of the technology proposed in combination with improved woodstove would provide householders with an appropriate and convenient cooking technology portfolio, increasing the opportunities of choice of the preferred energy system for the user and allowing significant savings for the family budget (up to 50% of the total annual cooking energy expenditure). The proposed model may be used also as a tool for the evaluation of the affordability or for the comparison of different cooking technologies also in other similar contexts, given their specific techno-economic parameter values. 相似文献
120.