全文获取类型
收费全文 | 2962篇 |
免费 | 3篇 |
国内免费 | 37篇 |
专业分类
安全科学 | 59篇 |
废物处理 | 150篇 |
环保管理 | 312篇 |
综合类 | 396篇 |
基础理论 | 1107篇 |
污染及防治 | 587篇 |
评价与监测 | 214篇 |
社会与环境 | 175篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 8篇 |
2021年 | 15篇 |
2020年 | 3篇 |
2019年 | 3篇 |
2018年 | 115篇 |
2017年 | 118篇 |
2016年 | 184篇 |
2015年 | 52篇 |
2014年 | 23篇 |
2013年 | 33篇 |
2012年 | 435篇 |
2011年 | 220篇 |
2010年 | 30篇 |
2009年 | 35篇 |
2008年 | 50篇 |
2007年 | 67篇 |
2006年 | 71篇 |
2005年 | 396篇 |
2004年 | 531篇 |
2003年 | 406篇 |
2002年 | 45篇 |
2001年 | 39篇 |
2000年 | 20篇 |
1999年 | 31篇 |
1998年 | 4篇 |
1997年 | 9篇 |
1996年 | 5篇 |
1995年 | 12篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 4篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1971年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1966年 | 2篇 |
1961年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有3002条查询结果,搜索用时 171 毫秒
101.
The World Bank used the Consumer Price Index (CPI) to calculate changes in the world poverty level (measured in U.S. dollars)
prior to 1982. In 1983, the U.S. Bureau of Labor Statistics (BLS) replaced the CPI with several indices including CPI-W which
was then adopted by the World Bank. This caused the inflated rate of the U.S. dollars and the percentage of the world population
in poverty to be dramatically underestimated. This new incorrect procedure gives 25% (1.5 million) below the poverty line
in 2005, while the more appropriate procedure (described herein) gives 52% (3.3 million in 2005). The rapid rise of the poverty
line (using the preferable CPI) starting in 1987 occurred at nearly the same time as the peak in per capita annual cereal
production. 相似文献
102.
Pesticide use among smallholder rice farmers in Tanzania 总被引:1,自引:0,他引:1
Nadja Stadlinger Aviti J. Mmochi Sonja Dobo Emma Gyllb?ck Linda Kumblad 《Environment, Development and Sustainability》2011,13(3):641-656
In an interview study conducted among smallholder rice farmers in Rufiji, Tanzania coastal mainland, and in Cheju, Zanzibar, farmer??s pesticide use and risk awareness were assessed. The farmers generally lacked knowledge or possibilities to manage the pesticides as prescribed by the manufacturers. Few farmers knew what kind of pesticides they were using and had never seen the original packages, as pesticides were usually sold per weight or already diluted without labeling. Protective equipment was rarely used since they were not aware of risks associated with pesticides or did not know where to purchase protective gear. Only half of the farmers were aware of pesticides?? health hazards and few associated pesticides with environmental problems. The pesticide use was relatively low, but based on farmers?? pesticide handling and application practices, health risks were a major concern. Most farmers did not believe in successful rice cultivation without using pesticides to control pests. However, estimated yields did not differ between pesticide users or farmers using conventional methods or neem tree extract. To avoid negative effects on human health and the environment, the farmers need basic education and better assistance in their farming practices and pesticide management. 相似文献
103.
Kabra AN Khandare RV Kurade MB Govindwar SP 《Environmental science and pollution research international》2011,18(8):1360-1373
Purpose
The dyes and dye stuffs present in effluents released from textile dyeing industries are potentially mutagenic and carcinogenic. Phytoremediation technology can be used for remediating sites contaminated with such textile dyeing effluents. The purpose of the work was to explore the potential of Glandularia pulchella (Sweet) Tronc. to decolorize different textile dyes, textile dyeing effluent, and synthetic mixture of dyes. 相似文献104.
Liu X Sun L Yuan D Yin L Chen J Liu Y Liu C Liang Y Lin F 《Environmental science and pollution research international》2011,18(8):1324-1332
Background and purpose
More and more coal-fired power plants equipped with seawater flue gas desulfurization systems have been built in coastal areas. They release large amount of mercury (Hg)-containing waste seawater into the adjacent seas. However, very limited impact studies have been carried out. Our research targeted the distribution of Hg in the seawater, sediment, biota, and atmosphere, and its environmental transportation. 相似文献105.
Evaluation of hexachlorocyclohexane contamination from the last lindane production plant operating in India 总被引:3,自引:3,他引:0
Jit S Dadhwal M Kumari H Jindal S Kaur J Lata P Niharika N Lal D Garg N Gupta SK Sharma P Bala K Singh A Vijgen J Weber R Lal R 《Environmental science and pollution research international》2011,18(4):586-597
Purpose
??-Hexachlorocyclohexane (HCH), ??-HCH, and lindane (??-HCH) were listed as persistent organic pollutants by the Stockholm Convention in 2009 and hence must be phased out and their wastes/stockpiles eliminated. At the last operating lindane manufacturing unit, we conducted a preliminary evaluation of HCH contamination levels in soil and water samples collected around the production area and the vicinity of a major dumpsite to inform the design of processes for an appropriate implementation of the Convention.Methods
Soil and water samples on and around the production site and a major waste dumpsite were measured for HCH levels.Results
All soil samples taken at the lindane production facility and dumpsite and in their vicinity were contaminated with an isomer pattern characteristic of HCH production waste. At the dumpsite surface samples contained up to 450?g?kg?1 ?? HCH suggesting that the waste HCH isomers were simply dumped at this location. Ground water in the vicinity and river water was found to be contaminated with 0.2 to 0.4?mg?l?1 of HCH waste isomers. The total quantity of deposited HCH wastes from the lindane production unit was estimated at between 36,000 and 54,000?t.Conclusions
The contamination levels in ground and river water suggest significant run-off from the dumped HCH wastes and contamination of drinking water resources. The extent of dumping urgently needs to be assessed regarding the risks to human and ecosystem health. A plan for securing the waste isomers needs to be developed and implemented together with a plan for their final elimination. As part of the assessment, any polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDF) generated during HCH recycling operations need to be monitored. 相似文献106.
Vijgen J Abhilash PC Li YF Lal R Forter M Torres J Singh N Yunus M Tian C Schäffer A Weber R 《Environmental science and pollution research international》2011,18(2):152-162
Purpose
Hexachlorocyclohexane (HCH) isomers (??-, ??- and ??- (Lindane)) were recently included as new persistent organic pollutants (POPs) in the Stockholm Convention, and therefore, the legacy of HCH and Lindane production became a contemporary topic of global relevance. This article wants to briefly summarise the outcomes of the Stockholm Convention process and make an estimation of the amount of HCH waste generated and dumped in the former Lindane/HCH-producing countries.Results
In a preliminary assessment, the countries and the respective amount of HCH residues stored and deposited from Lindane production are estimated. Between 4 and 7 million tonnes of wastes of toxic, persistent and bioaccumulative residues (largely consisting of alpha- (approx. 80%) and beta-HCH) are estimated to have been produced and discarded around the globe during 60 years of Lindane production. For approximately 1.9 million tonnes, information is available regarding deposition. Countries are: Austria, Brazil, China, Czech Republic, France, Germany, Hungary, India, Italy, Japan, Macedonia, Nigeria, Poland, Romania, Slovakia, South Africa, Spain, Switzerland, Turkey, The Netherlands, UK, USA, and former USSR. The paper highlights the environmental relevance of deposited HCH wastes and the related POPs?? contaminated sites and provides suggestions for further steps to address the challenge of the legacy of HCH/Lindane production.Conclusion
It can be expected that most locations where HCH waste was discarded/stockpiled are not secured and that critical environmental impacts are resulting from leaching and volatilisation. As parties to the Stockholm Convention are legally required to take action to stop further POPs pollution, identification and evaluation of such sites are necessary. 相似文献107.
Minakshi?Sultania Deepak?SrivastavaEmail author 《Journal of Polymers and the Environment》2011,19(4):950-956
Diglycidyl ether of bisphenol—A (DGEBA)—based epoxy resin was blended in the ratio of 3:1 (weight basis) with cycloaliphatic
epoxy (CAE) resin. The prepared blend sample was further blended with different weight percentages of carboxyl-terminated
butadiene acrylonitrile copolymer (CTBN) ranging between 0 and 25 wt% with an interval of 5 wt% and cured with stiochiometric
amounts of 4, 4’- diamino diphenyl sulphone (DDS) cure agent. Structural changes during blending were studied by Fourier-transform
infra-red (FTIR) spectroscopic analysis. The kinetic parameters, viz., order of decomposition reaction (n), activation energy (E), pre-exponential factor (Z) and rate decomposition constant (k), for the decomposition of the samples were calculated by applying Coats-Redfern equation over thermogravimetric (TG) data.
The degradation of each sample followed second-order degradation kinetics, which was calculated by Coats-Redfern equation
using best-fit analysis. This was further confirmed by linear regression analysis. The validity of data was checked by t-test
statistical analysis. Further, the blend sample had higher initial degradation temperature and activation energy than its
respective pure epoxy resin indicating that the CTBN acted as thermal stabilizer for epoxy resin which improved the thermal
stability. 相似文献
108.
109.
110.
Suranjan?SinhaEmail author Surajit?Chakraborty Shatrajit?Goswami 《Environment, Development and Sustainability》2017,19(3):807-824
Ecological footprint of mining can be used as an indicator to monitor and regulate mining operations and ensure long-term environmental sustainability. It can be viewed as a mining footprint, which is surrogate of the environmental impacts of mining. In this paper, a methodological framework is developed to demonstrate how ecological footprint can be used as an indicator of environmental degradation. Nine air quality and 26 soil quality samples are collected from the adjoining area of a mechanized coal mine, located in Raniganj coal mining belt of Burdwan district, West Bengal. Geographical information system is used for data interpolation and preparation of air and soil quality maps. The weights of different air and soil quality parameters are calculated by running principal component analysis. These derived weights are used for preparation of final composite air and soil quality maps. The composite maps show the mining footprints, expressed as land equivalent, around the active mine sites. The impact zones reveal the extent of degradation of the soil and air qualities in the areas near a mine. It is found that the impact zones, with respect to air and soil qualities, extend over areas which are 7.7 and 7.8 times the actual mining areas, that is, the area covered under mining operations, respectively. The results show the extent of degradation of air and soil qualities of the area. At different stages of mining, these footprints can be used as indicators to reveal the areas where soil and air qualities are adversely impacted. 相似文献