全文获取类型
收费全文 | 1297篇 |
免费 | 32篇 |
国内免费 | 18篇 |
专业分类
安全科学 | 54篇 |
废物处理 | 68篇 |
环保管理 | 128篇 |
综合类 | 279篇 |
基础理论 | 228篇 |
环境理论 | 1篇 |
污染及防治 | 346篇 |
评价与监测 | 144篇 |
社会与环境 | 79篇 |
灾害及防治 | 20篇 |
出版年
2023年 | 10篇 |
2022年 | 16篇 |
2021年 | 30篇 |
2020年 | 17篇 |
2019年 | 17篇 |
2018年 | 38篇 |
2017年 | 49篇 |
2016年 | 43篇 |
2015年 | 31篇 |
2014年 | 59篇 |
2013年 | 93篇 |
2012年 | 44篇 |
2011年 | 80篇 |
2010年 | 54篇 |
2009年 | 64篇 |
2008年 | 73篇 |
2007年 | 69篇 |
2006年 | 51篇 |
2005年 | 53篇 |
2004年 | 60篇 |
2003年 | 69篇 |
2002年 | 49篇 |
2001年 | 53篇 |
2000年 | 30篇 |
1999年 | 25篇 |
1998年 | 16篇 |
1997年 | 12篇 |
1996年 | 5篇 |
1995年 | 12篇 |
1994年 | 10篇 |
1993年 | 14篇 |
1992年 | 16篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 6篇 |
1988年 | 6篇 |
1987年 | 2篇 |
1986年 | 5篇 |
1985年 | 8篇 |
1984年 | 4篇 |
1983年 | 8篇 |
1982年 | 8篇 |
1981年 | 4篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1976年 | 2篇 |
1970年 | 2篇 |
1962年 | 5篇 |
1961年 | 2篇 |
1938年 | 1篇 |
排序方式: 共有1347条查询结果,搜索用时 93 毫秒
631.
Environmental fate of glyphosate and aminomethylphosphonic acid in surface waters and soil of agricultural basins 总被引:2,自引:0,他引:2
Virginia C. Aparicio Eduardo De Gerónimo Damián Marino Jezabel Primost Pedro Carriquiriborde José L. Costa 《Chemosphere》2013
Argentinian agricultural production is fundamentally based on a technological package that combines no-till and glyphosate in the cultivation of transgenic crops. Transgenic crops (soybean, maize and cotton) occupy 23 million hectares. This means that glyphosate is the most employed herbicide in the country, where 180–200 million liters are applied every year. 相似文献
632.
Florentino B. De la Cruz Jeffrey P. Chanton Morton A. Barlaz 《Waste management (New York, N.Y.)》2013,33(10):2001-2005
Landfills are an anaerobic ecosystem and represent the major disposal alternative for municipal solid waste (MSW) in the U.S. While some fraction of the biogenic carbon, primarily cellulose (Cel) and hemicellulose (H), is converted to carbon dioxide and methane, lignin (L) is essentially recalcitrant. The biogenic carbon that is not mineralized is stored within the landfill. This carbon storage represents a significant component of a landfill carbon balance. The fraction of biogenic carbon that is not reactive in the landfill environment and therefore stored was derived for samples of excavated waste by measurement of the total organic carbon, its biogenic fraction, and the remaining methane potential. The average biogenic carbon content of the excavated samples was 64.6 ± 18.0% (average ± standard deviation), while the average carbon storage factor was 0.09 ± 0.06 g biogenic-C stored per g dry sample or 0.66 ± 0.16 g biogenic-C stored per g biogenic C. 相似文献
633.
M. B. M. Bracke Carolien C. De Lauwere Samantha M. M. Wind Johan J. Zonerland 《Journal of Agricultural and Environmental Ethics》2013,26(4):847-868
The Dutch policy objective of a fully sustainable livestock sector without mutilations by 2023 is not compatible with the routine practice of tail docking to minimize the risk of tail biting. To examine farmer attitudes towards docking, a telephone survey was conducted among 487 conventional and 33 organic Dutch pig farmers. “Biting” (of tails, ears, or limbs) was identified by the farmers as a main welfare problem in pig farming. About half of the farmers reported to have no tail biting problems in their own herd. When farmers did report problems, they most often reported figures between 1 and 5 % of the animals. High incidences of tail biting were anticipated when trying to keep undocked pigs. Enrichment materials used in the conventional sector included mainly chains (52–63 % of the farms) and hanging rubber or plastic balls (22–30 %). Straw, sawdust, or wood shavings was hardly provided in conventional pig farming (2–3 %), in contrast to organic farming (88–100 % of farms). Conventional pig farmers feel a curly tail is not very important for sustainable pig farming. They consider enrichment to be less effective and tail docking to be less stressful for them and their piglets than their organic colleagues do. Pig farmers identified climate as a main risk factor for tail biting as opposed to enrichment. The objective of reducing routine tail docking requires solutions for dealing with tail biting problems at the farm level. In this process, transfer of scientific knowledge about enrichment materials and other measures to prevent and cure tail biting is critical, as is a change in farmer attitudes and awareness of the moral issues involved. 相似文献
634.
Correa Carlos Alberto De Oliveira Marcio Adilson Jacinto Christiane Mondelli Giulliana 《Journal of Material Cycles and Waste Management》2022,24(3):1140-1155
Journal of Material Cycles and Waste Management - The present study is concerned with an overview of the main aspects of the selective collection from the municipal solid waste in São... 相似文献
635.
Dromard Charlotte R. Allenou Jean-Pierre Tapie Nathalie Budzinski Hélène Cimmaterra Nicolas De Rock Pauline Arkam Salim Cordonnier Sébastien Gonzalez Jean-Louis Bouchon-Navaro Yolande Bouchon Claude Thouard Emmanuel 《Environmental science and pollution research international》2022,29(54):81546-81556
Environmental Science and Pollution Research - The present study, conducted in the Galion Bay in Martinique, aims to highlight the temporal and seasonal variations of chlordecone contamination (an... 相似文献
636.
Manzo Sonia Parrella Luisa Schiavo Simona Spaziani Fabio Chiavarini Salvatore Tebano Carlo De Maio Lucio Capone Stefano Siciliano Anna Valeria Armiento Giovanna 《Environmental science and pollution research international》2022,29(55):83291-83303
Environmental Science and Pollution Research - In this study we propose, a multi-step strategy of selection and characterization of long-term dataset of contaminant concentrations in different... 相似文献
637.
Mechanochemical treatment to recycling asbestos-containing waste 总被引:1,自引:0,他引:1
Plescia P Gizzi D Benedetti S Camilucci L Fanizza C De Simone P Paglietti F 《Waste management (New York, N.Y.)》2003,23(3):209-218
Numerous industrial and experimental facilities have been set up, particularly in the last ten years, as a result of studies and researches on treating asbestos-containing waste (ACW) to stabilise it and to enable its reuse. Some of the stabilisation processes reduce the hazards of ACW by imprisoning in a cement or resonoid matrix. Other processes modify the fibrous structure of asbestos and transform it into an inert substance. One such inactivation process is mechanochemical transformation. This new technology is extremely interesting both economically and industrially, especially in view of the European Directive 1999/3/CE of 24/4/99, which provides for the obligatory treatment of all types of waste material before its disposal. 相似文献
638.
In this work we present the results of an experimental study on the abatement of polychlorinated biphenyl (PCBs) in contaminated soil using a high energy milling technique, that promotes a reaction only by impact between milling bodies. A sample of soil from a controlled landfill was treated with powdered NaBH(4) using two different hydride/soil ratios (5 and 2.5% w/w). The efficiency of the dehalogenation/hydrogenation reaction was studied as a function of the milling time (3.5 up to 30 h). After each run, the total PCBs content and the production of inorganic chloride were measured. The complete abatement was obtained with a starting PCBs concentration of about 2600 mg/kg. The residual PCBs concentration resulted to be <0.2 mg/kg. The final products of the treatment were biphenyl and NaCl. Other toxic or hazardous organic by-products were not generated. Boron was found as boric acid. 相似文献
639.
An ecological impact study was performed based on in situ biomarker assays with the waterflea Daphnia magna. The effects of metallurgic effluents on the energy metabolism, anti-oxidative metabolism and DNA damage were assessed in caged daphnids during a 4-week study. In situ survival and reproduction studies demonstrated a clear impact on these parameters in organisms exposed in the most polluted areas. At the downstream--sublethal--zone the organisms were disturbed within their tolerance limits, resulting in alterations of their energy metabolism. These data suggest an acclimation hypothesis, which was tested through the analysis of the energy metabolism of resident species: isopods and amphipods. These organisms had shifted to a decrease in their overall energy metabolism compared to the upstream region. This change in some biochemical processes suggests a selective advantage to cope with the prevailing environmental conditions. In addition, we found clear genotoxic effects caused by the industrial discharges that might correlate with a reduction in (long-term) survival. 相似文献
640.
Sediment phosphorus extractants for phosphorus-31 nuclear magnetic resonance analysis: a quantitative evaluation 总被引:2,自引:0,他引:2
Ahlgren J De Brabandere H Reitzel K Rydin E Gogoll A Waldebäck M 《Journal of environmental quality》2007,36(3):892-898
The influence of pre-extractant, extractant, and post-extractant on total extracted amounts of P and organic P compound groups measured with 31P nuclear magnetic resonance (31P-NMR) in lacustrine sediment was examined. The main extractants investigated were sodium hydroxide (NaOH) and sodium hydroxide ethylenediaminetetraacetic acid (NaOH-EDTA) with bicarbonate buffered dithionite (BD) or EDTA as pre-extractants. Post extractions were conducted using either NaOH or NaOH-EDTA, depending on the main extractant. Results showed that the most efficient combination of extractants for total P yield was NaOH with EDTA as pre-extractant, yielding almost 50% more than the second best procedure. The P compound groups varying the most between the different extraction procedures were polyphosphates and pyrophosphates. NaOH with BD as pre-extractant was the most efficient combination for these compound groups. 相似文献