全文获取类型
收费全文 | 712篇 |
免费 | 5篇 |
国内免费 | 13篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 70篇 |
环保管理 | 42篇 |
综合类 | 102篇 |
基础理论 | 145篇 |
污染及防治 | 248篇 |
评价与监测 | 78篇 |
社会与环境 | 29篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 14篇 |
2022年 | 33篇 |
2021年 | 33篇 |
2020年 | 19篇 |
2019年 | 11篇 |
2018年 | 23篇 |
2017年 | 24篇 |
2016年 | 48篇 |
2015年 | 26篇 |
2014年 | 52篇 |
2013年 | 68篇 |
2012年 | 52篇 |
2011年 | 62篇 |
2010年 | 29篇 |
2009年 | 38篇 |
2008年 | 30篇 |
2007年 | 43篇 |
2006年 | 34篇 |
2005年 | 16篇 |
2004年 | 23篇 |
2003年 | 13篇 |
2002年 | 15篇 |
2001年 | 2篇 |
2000年 | 4篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1983年 | 1篇 |
排序方式: 共有730条查询结果,搜索用时 15 毫秒
631.
Konstantinos Kostarelos Daniela Reale Dimitris Dermatas Ennio Rao Deok Hyun Moon 《Water, Air, & Soil Pollution: Focus》2006,6(1-2):171-189
The presence of hexavalent chromium, Cr(VI), in soil is an environmental concern due to its effect on human health. The concern
arises from the leaching and the seepage of Cr(VI) from soil to groundwater. In this paper, a stabilization technology to
prevent this problem was simulated on an artificial soil contaminated with hexavalent chromium. The process is a physico-chemical
treatment in which the toxic pollutant is physically entrapped within a solid matrix formed by the pozzolanic reactions of
lime and fly ash to reduce its leachability and, therefore, its toxicity. This paper presents the optimum ratio of fly ash
and lime in order to stabilize artificial soils contaminated with 0.4 wt.% of Cr (VI) in a brief term process. The degree
of chromium released from the soil was evaluated using a modified Toxicity Characteristic Leaching Procedure (TCLP) by US
Environmental Protection Agency (EPA). Overall, experimental results showed reduced leachability of total and hexavalent chromium
from soils treated with both fly ash and quicklime, and that leachability reduction was more effective with increasing amount
of fly ash and quicklime. Stabilization percentages between 97.3% and 99.7% of the initial chromium content were achieved,
with Cr(VI) concentration in the TCLP leachates below the US EPA limit for chromium of 5 mg/l. Adequate treatment was obtained
after 1 day of curing with just 25% fly ash and 10% quicklime. 相似文献
632.
Mapping and Modeling the Biogeochemical Cycling of Turf Grasses in the United States 总被引:6,自引:0,他引:6
Milesi C Running SW Elvidge CD Dietz JB Tuttle BT Nemani RR 《Environmental management》2005,36(3):426-438
Turf grasses are ubiquitous in the urban landscape of the United States and are often associated with various types of environmental
impacts, especially on water resources, yet there have been limited efforts to quantify their total surface and ecosystem
functioning, such as their total impact on the continental water budget and potential net ecosystem exchange (NEE). In this
study, relating turf grass area to an estimate of fractional impervious surface area, it was calculated that potentially 163,800
km2 (± 35,850 km2) of land are cultivated with turf grasses in the continental United States, an area three times larger than that of any irrigated
crop. Using the Biome-BGC ecosystem process model, the growth of warm-season and cool-season turf grasses was modeled at a
number of sites across the 48 conterminous states under different management scenarios, simulating potential carbon and water
fluxes as if the entire turf surface was to be managed like a well-maintained lawn. The results indicate that well-watered
and fertilized turf grasses act as a carbon sink. The potential NEE that could derive from the total surface potentially under
turf (up to 17 Tg C/yr with the simulated scenarios) would require up to 695 to 900 liters of water per person per day, depending
on the modeled water irrigation practices, suggesting that outdoor water conservation practices such as xeriscaping and irrigation
with recycled waste-water may need to be extended as many municipalities continue to face increasing pressures on freshwater. 相似文献
633.
Anna Duro Vincenzo Piccione Daniela Zampino 《Environmental monitoring and assessment》2013,185(5):3803-3817
In this study, pollen viability and germination of three plant species, Cercis siliquastrum L., Robinia pseudoacacia L., and Spartium junceum L., belonging to the Fabaceae family, was evaluated in sites with different intensity of road traffic, constantly monitored with continuous analysers for air pollutants (carbon monoxide (CO), sulphur dioxide (SO2), and nitrogen dioxide (NO2)) by the Municipality of Catania. Two sites, in which road traffic was absent, were selected, too. The percentages of viable pollen by 2,3,5-trypheniltetrazolium chloride (TTC) test ranged from 59.0 to 90.2 % in C. siliquastrum, from 61.5 to 83.5 % in S. junceum and from 67.5 to 84.3 % in R. pseudoacacia. The percentages of germination varied from 41.0 to 72.7 % in C. siliquastrum, from 42.0 to 64.7 % in S. junceum and from 38.3 to 66.3 % in R. pseudoacacia. The highest percentages of viable pollens were found in no-road traffic stations by either TTC or germination tests, while the lowest values were detected in a site characterised by heavy road traffic. In the monitored period (2007–2009), pollen viability, germinability and tube length of C. siliquastrum resulted in a significant negative correlation to CO, SO2 and NO2, whereas data from TTC and germination tests on S. junceum and R. pseudoacacia pollens were not well correlated to air pollutants. The results showed that pollen viability, germination and tube growth in C. siliquastrum were affected by air pollution. S. junceum and R. pseudoacacia were not very influenced by air pollutants, suggesting a different pollen sensitivity of these species. 相似文献
634.
635.
Marguerite Miguet Julien Thevenon Vincent Laugel Mathilde Lefebvre Aurélie Bourchany Jean-Baptiste Rivière Yannis Duffourd Elise Schaefer Maria Cristina Antal Rosalie Abida Anne-Sophie Weingertner Valérie Kremer Pierre Vabres Fanny Morice-Picard Marie Gonzales Dan Lipsker Sylvie Fraitag Jean-Louis Mandel Jamel Chelly Hélène Dollfus Laurence Faivre Christel Thauvin-Robinet Nadège Calmels Salima El Chehadeh 《黑龙江环境通报》2016,36(13):1276-1279
636.
637.
Michael Aertsen Mariana C. Diogo Steven Dymarkowski Jan Deprest Daniela Prayer 《黑龙江环境通报》2020,40(1):6-17
渤海S油田A2井渗氮防腐油管在注聚过程中发现多处腐蚀穿孔,为避免换管柱后再次发生腐蚀失效,通过腐蚀形貌观察、腐蚀产物分析、腐蚀介质分析对A2井油管腐蚀失效原因进行了研究。认为A2井油管部分渗氮层脱落,形成了电化学腐蚀的阳极,这是造成局部腐蚀的根本原因。注入水中存在较高含量的氯离子和硫酸盐还原菌,加剧了腐蚀进程,造成油管腐蚀穿孔,形成了以FeCO_3为主的腐蚀产物。建议加强渗氮油管质量管控,防止入井前渗氮层脱落,同时在注入水中加入杀菌剂减少细菌对腐蚀的影响,并在井下安装牺牲阳极短节预防腐蚀。 相似文献
638.
Dielle Monteiro Teixeira Juliana Merces Hernandez Luciana Damascena Silva Darleise de Souza Oliveira Paula Katharine de Pontes Spada Tereza Cristina Monteiro Gurjão Joana D’Arc Pereira Mascarenhas Alexandre Costa Linhares Lena Líllian Canto de Sá Morais Yvone Benchimol Gabbay 《Food and environmental virology》2016,8(1):101-104
Noroviruses are the major cause of non-bacterial acute gastroenteritis outbreaks in humans, with few reports about the occurrence of the norovirus GIV strain. We investigated the presence of norovirus GIV in surface water (river, bay, and stream) and untreated sewage, and we determined a positivity rate of 9.4 % (9/96). The strains genotyped were GIV.1. To our knowledge, this is the first report of GIV in Brazil. 相似文献
639.
The aim of this study was to investigate the sinterability to improve the technical properties of ceramic bodies made from coal bottom ash and soda-lime glass cullet. Different mixtures of bottom ash and glass cullet were formulated. The amount of bottom ash was 100, 70, 50 and 30 wt.%. The particle size distribution was the same for all formulations. The mixture containing 50 wt.% bottom ash also had its particle size distribution changed. Samples were formed by dry pressing and then fired at 950, 1050 and 1150 degrees C. Samples were evaluated for linear shrinkage, water absorption, flexural mechanical resistance, scanning electronic microscopy, pyroplastic deformation and thermodilatometric analysis. The higher firing temperature led to a decrease in water absorption and increased linear shrinkage, mechanical resistance and pyroplastic deformation. This effect was also observed for addition of glass up to 50 wt.%. The effect of smaller particles of bottom ash was more significant for linear shrinkage and mechanical resistance of ceramic bodies fired at 1150 degrees C. The use of a finer powder contributed to increase these properties. The influence of finer particles on water absorption and mechanical resistance of ceramic bodies fired at 950 and 1050 degrees C was not significant. 相似文献
640.
Chingoileima Maibam Patrick Fink Giovanna Romano Maria Cristina Buia Maria Cristina Gambi Maria Beatrice Scipione Francesco Paolo Patti Maurizio Lorenti Emanuela Butera Valerio Zupo 《Marine Biology》2014,161(7):1639-1652
Plants evolve the production of wound-activated compounds (WACs) to reduce grazing pressure. In addition, several plant-produced WACs are recognized by various invertebrates, playing the role of infochemicals. Due to co-evolutionary processes, some invertebrates recognize plant infochemicals and use them to identify possible prey, detect the presence of predators or identify algae containing various classes of toxic metabolites. Different metabolites present in the same algae can play the role of toxins, infochemicals or both simultaneously. We investigated the infochemical activity of compounds extracted from three diatoms epiphytes of the seagrass Posidonia oceanica, by conducting choice experiments on invertebrates living in the same community or in close proximity. Furthermore, the specific toxicity of the extracts obtained from the same algae was tested on sea urchin embryos using a standard bioassay procedure, to detect the presence of toxins. The comparison of the two effects demonstrated that invertebrates are subjected to diatom wound-activated toxicants when these algae are not associated with their own habitat, but they are able to recognize volatile infochemicals derived from diatoms associated with their habitats. The specific toxicity of WACs was shown to be inversely correlated to the perceptive ability of invertebrates towards volatile compounds liberated by the same algae. Hence, when the recognition of specific algae by a given invertebrate species evolves, their detrimental effects on the receiving organism may be lost. 相似文献