全文获取类型
收费全文 | 581篇 |
免费 | 16篇 |
国内免费 | 10篇 |
专业分类
安全科学 | 16篇 |
废物处理 | 38篇 |
环保管理 | 111篇 |
综合类 | 98篇 |
基础理论 | 164篇 |
环境理论 | 4篇 |
污染及防治 | 98篇 |
评价与监测 | 50篇 |
社会与环境 | 25篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 6篇 |
2022年 | 6篇 |
2021年 | 11篇 |
2020年 | 11篇 |
2019年 | 12篇 |
2018年 | 14篇 |
2017年 | 22篇 |
2016年 | 31篇 |
2015年 | 25篇 |
2014年 | 24篇 |
2013年 | 53篇 |
2012年 | 40篇 |
2011年 | 40篇 |
2010年 | 27篇 |
2009年 | 36篇 |
2008年 | 27篇 |
2007年 | 22篇 |
2006年 | 28篇 |
2005年 | 18篇 |
2004年 | 14篇 |
2003年 | 15篇 |
2002年 | 15篇 |
2001年 | 9篇 |
2000年 | 8篇 |
1999年 | 11篇 |
1998年 | 7篇 |
1997年 | 9篇 |
1996年 | 4篇 |
1995年 | 8篇 |
1994年 | 2篇 |
1993年 | 6篇 |
1992年 | 4篇 |
1991年 | 6篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1986年 | 5篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1982年 | 4篇 |
1981年 | 4篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1976年 | 1篇 |
1974年 | 3篇 |
1961年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有607条查询结果,搜索用时 14 毫秒
531.
Haifeng Jia Xiangwen Wang Chaopu Ti Yanyun Zhai Richard Field Anthony N. Tafuri Huihua Cai Shaw L. Yu 《Environmental monitoring and assessment》2015,187(6):373
In order to assess the urban runoff control effectiveness of a low-impact development best management practice (LID-BMP) treatment train system, a field test of selected LID-BMPs was conducted in China. The LID-BMPs selected include three grassed swales, a buffer strip, a bioretention cell, two infiltration pits, and a constructed wetland. The test site is in a campus in southern China. The LID-BMPs, connected in a series, received stormwater runoff from four tennis courts with an area of 2808 m2 and eight basketball courts with an area of 4864 m2. Construction of the LID-BMPs was completed in early spring of 2012, and the sampling was conducted during May of 2012 to September of 2013. During the sampling effort, besides the performance evaluations of grassed swales and the bioretention cell in controlling runoff quantity as well as quality, the emphasis was also on determining the performance of the LID-BMP treatment train system. A total of 19 storm events were monitored, with nine producing no runoff and ten producing runoff. Data collected from the ten storm events were analyzed for estimating runoff quantity (peak flow rate and total runoff volume) and quality reduction by the LID-BMPs. The sum of loads (SOL) method was used for calculating the water quality performance of LID-BMPs. Results indicated that, for peak flow rate, a bioretention cell reduction of 50–84 % was obtained, and grassed swale reduction was 17–79 %, with a runoff volume reduction of 47–80 and 9–74 %, respectively. For water quality, the bioretention cell in general showed good removal for zinc (nearly 100 %), copper (69 %), NH3-N (ammonia nitrogen) (51 %), and total nitrogen (TN) (49 %); fair removal for chemical oxygen demand (COD) (18 %); and poor removal for total suspended solids (TSS) (?11 %) and total phosphorus (TP) (?21 %). And its performance effectiveness for pollutant removal increased in the second year after 1 year of stabilizing. When considering the aggregated effect of the LID-BMP treatment train system, it showed excellent removal for NH3-N (73 %), TN (74 %), and TP (95 %) and fair removal for COD (19 %) and TSS (35 %). The assessment results of the LID-BMP treatment train system provide valuable information on how to link the different types of LID-BMP facilities and maximize the integrated effectiveness on urban runoff control. 相似文献
532.
Leanne L. Stahl Blaine D. Snyder Anthony R. Olsen Lynn S. Walters 《Environmental monitoring and assessment》2013,185(12):10351-10364
Polybrominated diphenyl ethers (PBDEs) are persistent, bioaccumulative, and toxic chemicals that are present in air, water, soil, sediment, and biota (including fish). Most previous studies of PBDEs in fish were spatially focused on targeted waterbodies. National estimates were developed for PBDEs in fish from lakes and reservoirs of the conterminous US (excluding the Laurentian Great Lakes) using an unequal probability design. Predator (fillet) and bottom-dweller (whole-body) composites were collected during 2003 from 166 lakes selected randomly from the target population of 147,343 lakes. Both composite types comprised nationally representative samples that were extrapolated to the sampled population of 76,559 and 46,190 lakes for predators and bottom dwellers, respectively. Fish were analyzed for 34 individual PBDE congeners and six co-eluting congener pairs representing a total of 46 PBDEs. All samples contained detectable levels of PBDEs, and BDE-47 predominated. The maximum aggregated sums of congeners ranged from 38.3 ng/g (predators) to 125 ng/g (bottom dwellers). Maximum concentrations in fish from this national probabilistic study exceeded those reported from recent targeted studies of US inland lakes, but were lower than those from Great Lakes studies. The probabilistic design allowed the development of cumulative distribution functions to quantify PBDE concentrations versus the cumulative number of US lakes from the sampled population. 相似文献
533.
534.
535.
Jagadish Thaker Xiaoquan Zhao Anthony Leiserowitz 《Environmental Communication: A Journal of Nature and Culture》2017,11(3):353-369
Media plays a vital role in informing the public about environmental threats. Although climate change is a global problem, developing countries such as India are often more vulnerable to the impacts due to poverty, illiteracy, and low public awareness. Using data from a nationally representative survey in India, this paper explores the relationships between media use, issue attention, and trust in informational sources on one hand and science-based climate change beliefs, risk perceptions, and policy support on the other. Results suggest that the Indian media, through consistent and accurate coverage of global warming using trusted sources, can play a positive role in increasing public engagement among a largely unaware population. Implications for climate change communication in India are discussed. 相似文献
536.
Introduced plants that have both production values and negative impacts can be contentious. Generally they are either treated
as weeds and their use prohibited; or unfettered exploitation is permitted and land managers must individually contend with
any negative effects. Buffel grass (Cenchrus ciliaris) is contentious in Australia and there has been no attempt to broadly and systematically address the issues surrounding it.
However, recent research indicates that there is some mutual acceptance by proponents and opponents of each others’ perspectives
and we contend that this provides the basis for a national approach. It would require thorough and on-going consultation with
stakeholders and development of realistic goals that are applicable across a range of scales and responsive to regional differences
in costs, benefits and socio-economic and biophysical circumstances. It would be necessary to clearly allocate responsibilities
and ascertain the most appropriate balance between legislative and non-legislative mechanisms. A national approach could involve
avoiding the introduction of additional genetic material, countering proliferation in regions where the species is sparse,
preventing incursion into conservation reserves where it is absent, containing strategically located populations and managing
communities to prevent or reduce dominance by buffel grass. This approach could be applied to other contentious plant species. 相似文献
537.
Ghoshdastidar AJ Saunders JE Brown KH Tong AZ 《Journal of environmental science and health. Part. B》2012,47(7):742-750
Five pesticide formulations registered for use in Canada containing organophosphate-insecticide active ingredients azinphos-methyl, chlorpyrifos, diazinon, malathion and phorate were subjected to treatment by membrane bioreactor (MBR) technology. The target active ingredients were introduced to the MBR at ppm level concentrations. The biodegradation of these compounds was analyzed daily using selected ion monitoring gas chromatography-mass spectrometry (GC/MS-SIM) following extraction of the analytes using solid-phase extraction (SPE). Amounts measuring 83 % to 98 % of the target analytes were removed with steady-state concentrations being reached within 5 days of their introduction. The dissolved oxygen, temperature, pH, and total heterotrophic bacterial population were monitored daily to ensure optimal conditions for biodegradation. The quality of the effluent from the MBR was assessed daily through spectrophotometric methods. Measurements were conducted for the concentration of ammonia, nitrate, nitrite, total and reactive phosphorus, as well as the chemical oxygen demand (COD) of the effluent. This study demonstrated that the MBR technology is feasible and efficient for treatment of organophosphate pesticides without introducing additional chemical additives. 相似文献
538.
539.
Ying Li Hao Cheng R. J. S. Beeton Thomas Sigler Anthony Halog 《Environment, Development and Sustainability》2016,18(3):679-696
Sustainable development has broad consensus in environmental science and policy discourse, but its implications differ in specific cultural contexts. This article articulates sustainable development from a Chinese cultural perspective by tracing ideas from Chinese traditional culture and exploring China’s concept of harmonious development with emphasis on environmental management. Ideas that resemble sustainable development are not new to Chinese culture, but have roots in ancient Chinese thoughts, which in turn influence current governance and policies. Notably, Chinese traditional philosophies such as Confucianism, Taoism, Legalism, and Yin–Yang contain philosophies fundamental to sustainable development. As a distinct local discourse, such concepts were well interpreted and understood in the ancient meaning of harmony, giving China unique sustainability perspectives with institutional implications for policies of harmonious development and environmental management. Currently, China is driven to create a new national identity of harmonious development that involves Chinese traditional philosophies and values in its modern administration. The slogans “harmonious society” and “Chinese dream” reflect this new way of responding to the world with the aspiration to achieve cleaner growth, personal prosperity, and social stability. The Chinese and Western roots of sustainable development are conceptually, ideologically, and historically different, and this paper articulates how the convergence of the two underlies contemporary international debates. 相似文献
540.
Vincent?N.?Chigor Timothy?Sibanda Anthony?I.?OkohEmail author 《Environmental science and pollution research international》2013,20(6):4125-4136
The Buffalo River and its dams are major surface water sources used for fresh produce irrigation, raw water abstraction and recreation in parts of the Eastern Cape Province in South Africa. Over a 12-month period (August 2010 to July 2011), we assessed the bacteriological qualities of water from the river and 3 source water dams along its course. Faecal indicator bacteria (FIB), including total coliform (TC), faecal coliform (FC) and enterococci (ENT) counts, were high and ranged as follows: 1.9?×?102–3.8?×?107, 0–3.0?×?105 and 0–5.3?×?105?cfu/100 ml for TC, FC and ENT, respectively. Significantly (P?<?0.05) higher concentrations of FC and ENT were observed at the sampling sites located at the lower reaches of the river compared to the upper reaches, and at Bridle Drift Dam compared to the other two dams. FIB counts mostly exceeded the recommended maximum values suggested by national and international guidelines for safe fresh produce irrigation, domestic applications, full-contact recreation and livestock watering. These results show that the bacteriological qualities of the Buffalo River and dams were poor, and suggest that sewage was dumped into the Buffalo River during the study period. Urban runoffs and effluents of wastewater treatment plants appear to be important sources of faecal contamination in the river. We conclude that these water bodies represent significant public health hazards. Provision of adequate sanitary infrastructure will help prevent source water contamination, and public health education aimed at improving personal, household and community hygiene is imperative. 相似文献