全文获取类型
收费全文 | 1315篇 |
免费 | 56篇 |
国内免费 | 501篇 |
专业分类
安全科学 | 79篇 |
废物处理 | 79篇 |
环保管理 | 80篇 |
综合类 | 749篇 |
基础理论 | 220篇 |
污染及防治 | 538篇 |
评价与监测 | 47篇 |
社会与环境 | 46篇 |
灾害及防治 | 34篇 |
出版年
2023年 | 30篇 |
2022年 | 73篇 |
2021年 | 78篇 |
2020年 | 35篇 |
2019年 | 44篇 |
2018年 | 48篇 |
2017年 | 64篇 |
2016年 | 69篇 |
2015年 | 84篇 |
2014年 | 114篇 |
2013年 | 111篇 |
2012年 | 100篇 |
2011年 | 123篇 |
2010年 | 81篇 |
2009年 | 94篇 |
2008年 | 96篇 |
2007年 | 88篇 |
2006年 | 59篇 |
2005年 | 47篇 |
2004年 | 48篇 |
2003年 | 47篇 |
2002年 | 26篇 |
2001年 | 39篇 |
2000年 | 41篇 |
1999年 | 38篇 |
1998年 | 34篇 |
1997年 | 24篇 |
1996年 | 24篇 |
1995年 | 19篇 |
1994年 | 15篇 |
1993年 | 16篇 |
1992年 | 8篇 |
1991年 | 16篇 |
1990年 | 15篇 |
1989年 | 6篇 |
1988年 | 10篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有1872条查询结果,搜索用时 15 毫秒
981.
Li Bingxiao Cao Han Liu Kuo Xia Juan Sun Yanyan Peng Wenjuan Xie Yunyi Guo Chunyue Liu Xiaohui Wen Fuyuan Zhang Fengxu Shan Guangliang Zhang Ling 《Environmental science and pollution research international》2022,29(42):63057-63070
Environmental Science and Pollution Research - The assessment of the generalization of the strict hypertension definition in the 2017 ACC/AHA Hypertension Guideline from environmental condition... 相似文献
982.
环境污染转嫁问题的法律控制 总被引:3,自引:0,他引:3
随着国际经济技术交流的深入、国际贸易的发展 ,环境污染转嫁问题日益严重 ,严重阻碍了环境污染的治理秩序。对环境污染转嫁的产生、分类、途径及其控制与防范进行了分析。 相似文献
983.
Response of weeping willows to linear alkylbenzene sulfonate 总被引:5,自引:0,他引:5
Linear alkylbenzene sulfonate (LAS) is the most commonly used anionic surfactant in laundry detergents and cleaning agents. LAS compounds are found in surface waters and soils. The short-term acute toxicity of LAS to weeping willows (Salix babylonica L.) was investigated. Willow cuttings were grown in hydroponic solution spiked with LAS at 24.0+/-1 degrees C for 192 h. The normalized relative transpiration of plants was used to determine toxicity. Severe reduction of the transpiration was only found for high doses of LAS (240 mgl(-1)). Chlorophyll contents in leaves of treated plants varied with the dose of LAS, but there was no significant linear correlation. The activities of the enzymes superoxide dismutases (SOD), catalase (CAT), and peroxidase (POD) were quantified at the end of experiments. At higher concentrations of LAS (240 mgl(-1)), the activities of SOD and CAT were decreased. The correlation between the dose of LAS and the POD activity in leaf cells was the highest of all enzyme assays (R(2)=0.5). EC(50) values for a 50% inhibition of the transpiration of the trees were estimated to 374 mgl(-1) (72 h) and 166 mgl(-1) (192 h). Results from this experiment indicated that phytotoxic effects of LAS on willow trees are not expected for normal environmental conditions. 相似文献
984.
Modeling the dynamic changes in concentrations of gamma-hexachlorocyclohexane (gamma-HCH) in Tianjin region from 1953 to 2020 总被引:2,自引:0,他引:2
Tao S Yang Y Cao HY Liu WX Coveney RM Xu FL Cao J Li BG Wang XJ Hu JY Fang JY 《Environmental pollution (Barking, Essex : 1987)》2006,139(1):183-193
A level IV fugacity model was used to simulate the dynamic changes of gamma-hexachlorocyclohexane (gamma-HCH) concentrations in environmental media in Tianjin, China. A similar model (level III) was previously used and validated under steady state conditions; this paper explores its dynamic behavior. Application of the level IV fugacity model has been validated using independently observed gamma-HCH concentrations in various media during the early 1980s and during 2001. Sensitivity analysis was conducted using coefficient-of-variation normalized sensitivity coefficients. The model was also subject to uncertainty analysis using Monte Carlo simulation. It was found that concentrations of gamma-HCH reached within 95% of their steady-state levels in all media after less than 15 years. Around one order-of-magnitude decreases in gamma-HCH concentrations in various media occurred between 1993 and 2001. We project that gamma-HCH concentrations will decrease another 1.7-1.9 orders of magnitude to reach 1.1 (0.9-1.2) x 10(-14), 2.7 (2.5-3.0) x 10(-10), 1.2 (1.1-1.3) x 10(-7), and 6.1 (5.4-6.8) x 10(-8) mol/m(3), in air, water, soil, and sediment, respectively, by 2020. The sensitivities and true uncertainty of the model are discussed. 相似文献
985.
Geostatistical analysis and kriging of Hexachlorocyclohexane residues in topsoil from Tianjin, China 总被引:5,自引:0,他引:5
Li BG Cao J Liu WX Shen WR Wang XJ Tao S 《Environmental pollution (Barking, Essex : 1987)》2006,142(3):567-575
A previously published data set of HCH isomer concentrations in topsoil samples from Tianjin, China, was subjected to geospatial analysis. Semivariograms were calculated and modeled using geostatistical techniques. Parameters of semivariogram models were analyzed and compared for four HCH isomers. Two-dimensional ordinary block kriging was applied to HCH isomers data set for mapping purposes. Dot maps and gray-scaled raster maps of HCH concentrations were presented based on kriging results. The appropriateness of the kriging procedure for mapping purposes was evaluated based on the kriging errors and kriging variances. It was found that ordinary block kriging can be applied to interpolate HCH concentrations in Tianjin topsoil with acceptable accuracy for mapping purposes. 相似文献
986.
Philip Andrews-Speed Armando Zamora Christopher D. Rogers Lei Shen Shelley Cao & Minying Yang 《Natural resources forum》2002,26(1):45-54
The effective management of small-scale mines is one of the major challenges for governments in the mining sector. Small-scale mining may bring tangible, short-term benefits to the communities involved. However, these benefits are frequently outweighed by the costs incurred in terms of illness, injury, pollution, waste of natural resources and market distortions. Governments, international agencies and advisers are generally able to draw up lists of actions which are required to regulate and manage small-scale mines more effectively, but turning plans into sustained action has proved more difficult. Two aspects of policy implementation are crucial to success: the alignment of interests, and the attitude and effectiveness of government. Using a case study of township and village coal mines in China, this article develops an approach to analysing these issues that could assist regional policy makers and advisers in formulating policy, in identifying key obstacles to policy implementation, and in identifying particular parties which need to be infiuenced or educated in order for the policy to succeed. 相似文献
987.
随着苏州河环境整治工作的深入,苏州河水质得到了显著的改善。目前,各项整治措施还在实施的过程中.有些问题也有待解决,其中一个便是苏州河沿线雨水泵站排河的雨水污染问题。本文在综合考虑上海市水环境,城市建设及经济发展现状的基础上,对苏州河沿线雨水泵站污染消减技术作了阐述。并对其进行了比较,提出了进一步研究的方向。 相似文献
988.
989.
间羟基苯甲醛生产废水的处理 总被引:1,自引:0,他引:1
研究了萃取法处理间羟基苯甲醛生产废水的工艺条件,并在此基础上进行了废水的生化处理试验。结果表明:萃余液稀释15倍后用活性污泥法处理,出水COD能达到排放标准。 相似文献
990.