全文获取类型
收费全文 | 493篇 |
免费 | 24篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 5篇 |
环保管理 | 96篇 |
综合类 | 73篇 |
基础理论 | 136篇 |
环境理论 | 1篇 |
污染及防治 | 113篇 |
评价与监测 | 51篇 |
社会与环境 | 26篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 10篇 |
2022年 | 8篇 |
2021年 | 7篇 |
2020年 | 7篇 |
2019年 | 7篇 |
2018年 | 11篇 |
2017年 | 14篇 |
2016年 | 26篇 |
2015年 | 15篇 |
2014年 | 14篇 |
2013年 | 39篇 |
2012年 | 14篇 |
2011年 | 24篇 |
2010年 | 22篇 |
2009年 | 18篇 |
2008年 | 25篇 |
2007年 | 32篇 |
2006年 | 31篇 |
2005年 | 14篇 |
2004年 | 20篇 |
2003年 | 20篇 |
2002年 | 13篇 |
2001年 | 5篇 |
2000年 | 11篇 |
1999年 | 4篇 |
1998年 | 5篇 |
1997年 | 8篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 6篇 |
1993年 | 6篇 |
1992年 | 4篇 |
1991年 | 6篇 |
1990年 | 7篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 4篇 |
1984年 | 6篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 4篇 |
1979年 | 8篇 |
1978年 | 5篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1953年 | 1篇 |
1935年 | 1篇 |
1913年 | 1篇 |
排序方式: 共有520条查询结果,搜索用时 203 毫秒
151.
Stuart A. Hoenig Godfrey T. Sill Lee M. Kelley Kevin J. Garvey 《Journal of the Air & Waste Management Association (1995)》2013,63(3):277-278
A detailed analysis of international trends in air pollution control and waste management markets forecasts considerable growth and expansion due to increased economic activity, more stringent regulations requiring pollution control, and the increased amounts of solid waste being generated worldwide. 相似文献
152.
153.
154.
Bower J Savage KS Weinman B Barnett MO Hamilton WP Harper WF 《Environmental pollution (Barking, Essex : 1987)》2008,156(2):504-514
Elemental mercury (Hg0) is a metal with a number of atypical properties, which has resulted in its use in myriad anthropogenic processes. However, these same properties have also led to severe local subsurface contamination at many places where it has been used. As such, we studied the influence of various parameters on Hg(II) sorption onto pyrite (pH, time, Hg(II) concentration), a potential subsurface reactive barrier. Batch sorption studies revealed that total Hg(II) removal increases with both pH and time. X-ray absorption spectroscopy analysis showed that a transformation in the coordination environment at low pH occurred during aging over 2 weeks, to form an ordered monolayer of monodentate Hg-Cl complexes on pyrite. In column studies packed with pure quartz sand, the transport of Hg(II) was significantly retarded by the presence of a thin pyrite-sand reactive barrier, although dissolved oxygen inhibited Hg(II) sorption onto pyrite in the column. 相似文献
155.
Polybrominated diphenyl ethers (PBDEs) were measured in samples of human blood serum taken from 23 donors in Wellington, New Zealand. Concentrations expressed as the sum of congeners 47, 99, 100, 153, 154, and 183 (SigmaPBDE) were - at an average of 7.17 ng SigmaPBDE g (lipid)(-1) - within the range reported for human tissues in Europe, but lower than in Australia and North America. The most likely source of this contamination is considered to be the release of PBDEs from imported consumer goods. The congener pattern observed is in line with that reported for human tissues outside North America, but shows a lower contribution of PBDE 47 to SigmaPBDE than observed in North Americans. No significant (p>0.1) differences between concentrations in males and females were detected, and no relationship between donor age and SigmaPBDE concentration was observed. One donor displayed concentrations that were significantly elevated (i.e. > average +2 standard deviations) above those in others in this study. 相似文献
156.
Batterman S Chernyak S Gwynn E Cantonwine D Jia C Begnoche L Hickey JP 《Chemosphere》2007,69(3):444-457
While few environmental measurements of brominated diphenyl ethers (BDEs) were completed prior to the mid-1990s, analysis of appropriately archived samples might enable the determination of contaminant trends back to the introduction of these chemicals. In this paper, we first investigate the stability of BDEs in archived frozen and extracted fish samples, and then characterize trends of these chemicals in rainbow smelt (Osmerus mordax) and lake trout (Salvelinus namaycush) in each of the Great Lakes between 1979 and 2005. We focus on the four most common congeners (BDE-47, 100, 99 and 153) and use a change-point analysis to detect shifts in trends. Analyses of archived fish samples yielded precise BDE concentration measurements with only small losses (0.8% per year in frozen fish tissues, 2.2% per year in refrigerated extracts). Trends in fish from all Great Lakes showed large increases in BDE concentrations that started in the early to mid-1980s with fairly consistent doubling times (generally 2-4 years except in Lake Erie smelt where levels increased very slowly), though concentrations and trends show differences by congener, fish species and lake. The most recent data show that accumulation rates are slowing, and concentrations of penta- and hexa-congeners in trout from Lakes Ontario and Michigan and smelt from Lake Ontario started to decrease in the mid-1990s. Trends in smelt and trout are evolving somewhat differently, and trout concentrations in the five lakes are now ranked as Michigan>Superior=Ontario>Huron=Erie, and smelt concentrations as Michigan>Ontario>Huron>Superior>Erie. The analysis of properly archived samples permits the reconstruction of historical trends, congener distributions, biomagnification and other information that can aid the understanding and management of these contaminants. 相似文献
157.
Earthworms perform a number of essential functions in soil; the impacts of metals on earthworms are often investigated. In this review we consider the range of earthworm species, types of soil and forms of metal for which metal uptake and accumulation have been studied, the design of these experiments and the quantitative relationships that have been derived to predict earthworm metal body burden. We conclude that there is a need for more studies on earthworm species other than Eisenia fetida in order to apply the large existing database on this earthworm to other, soil dwelling species. To aid comparisons between studies agreement is needed on standard protocols that define exposure and depuration periods and the parameters, such as soil solution composition, soil chemical and physical properties to be measured. It is recommended that more field or terrestrial model ecosystem studies using real contaminated soil rather than metal-amended artificial soils are performed. 相似文献
158.
Stuart L. Halliday Mary Leigh Wolfe 《Journal of the American Water Resources Association》1991,27(2):237-245
ABSTRACT: A geographic information system (GRASS 3.1) was used to correlate the availability of nitrogen fertilizer with the susceptibility of ground water to pollution in Texas to identify potential ground water quality problems. An agricultural pollution susceptibility map, produced by the Texas Water Commission using the DRASTIC methodology, was combined with information on cropped areas, recommended nitrogen fertilizer application rates, and aquifer outcrops. A Nitrogen Fertilizer Pollution Potential Index was generated, identifying 24 percent of Texas within the high pollution potential category An analysis of the susceptibility of major aquifer outcrops to potential pollution from nitrogen fertilizer indicated that 34 percent of the outcrop areas fall in the high pollution potential range. It is proposed that correlating the availability of a pollutant with an assessment of the susceptibility of ground water to pollution yields a more accurate screening tool for identifying potential pollution problems than considering susceptibility alone. 相似文献
159.
Stuart Batterman 《Environmental management》1992,16(1):133-141
This article addresses the use of critical loads in optimized emission abatement strategies. Critical loads represent the
maximum tolerable deposition possible without adverse impacts, a limit that is highly spatially variable. As deposition targets,
critical loads cannot be satisfied at all receptors in Europe. Consequently, there is a need for alternative criteria that
still relate to ecological indicators, yet that are feasible, consistent, and equitable. Two criteria are suggested: the relative
critical load coverage and the relative deposition reduction. Deposition goals based on these criteria will guarantee that
a specified fraction of ecosystems will attain target loads and thus will be protected from adverse environmental impacts.
In areas that cannot achieve target loads with the best available control measures, deposition can be reduced to a specified
fraction of the unabated level.
Examples are presented that demonstrate their derivation and application of the two criteria. The criteria have been implemented
in the European-scale Regional Acidification Information and Simulation (RAINS) model. Results obtained indicate that optimized
emission strategies based on critical loads may be similar to emission strategies based on deposition reductions at certain
levels of the two criteria. This suggests that it may not be necessary to utilize critical loads to formulate deposition targets.
A second example shows the effect of excluding countries from European cost minimization. A country's participation can save
costs with moderate deposition targets; however, significant costs can be imposed with low (stringent) deposition targets.
These preliminary results have significant implications for multilateral negotiations. 相似文献
160.