全文获取类型
收费全文 | 304篇 |
免费 | 6篇 |
国内免费 | 17篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 9篇 |
环保管理 | 37篇 |
综合类 | 53篇 |
基础理论 | 43篇 |
污染及防治 | 125篇 |
评价与监测 | 29篇 |
社会与环境 | 10篇 |
灾害及防治 | 7篇 |
出版年
2023年 | 10篇 |
2022年 | 38篇 |
2021年 | 22篇 |
2020年 | 16篇 |
2019年 | 18篇 |
2018年 | 9篇 |
2017年 | 18篇 |
2016年 | 18篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 28篇 |
2012年 | 7篇 |
2011年 | 17篇 |
2010年 | 10篇 |
2009年 | 12篇 |
2008年 | 14篇 |
2007年 | 6篇 |
2006年 | 8篇 |
2005年 | 6篇 |
2004年 | 11篇 |
2003年 | 8篇 |
2002年 | 2篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1983年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1961年 | 1篇 |
排序方式: 共有327条查询结果,搜索用时 15 毫秒
131.
132.
尽管世界金融风暴放缓了世界节能减排的步伐,但节能减排仍是中央经济工作会议确定的我国2009年重点工作之一。对于新兴资源型工业城市乌海市来说,确保经济平稳快速增长的同时,又要顺利完成“十一五”节能减排目标,必须要有新的节能减排思路。 相似文献
133.
Huong Ta Thi Shah Izhar Hussain Park Hung-Suck 《Environmental science and pollution research international》2021,28(1):518-529
Environmental Science and Pollution Research - Vietnam has witnessed a rapid increase in national-level CO2 emissions due to rising urbanization, economic expansion, export growth, and industrial... 相似文献
134.
Qian-Feng Li Lingjuan Wang-Li Sanjay B. Shah R. K. M. Jayanty Peter Bloomfield 《Environmental science and pollution research international》2014,21(6):4675-4685
Ammonia (NH3) is an important base gas and can react with acidic species to form atmospheric aerosols. Due to the rapid growth of poultry and swine production in the North Carolina Coastal Plain, atmospheric NH3 concentrations across the region have subsequently increased. Ammonia concentrations and inorganic particulate matter (PM) at four ambient stations in the vicinity of an egg production facility were measured for 1 year using PM2.5 speciation samplers with honeycomb denuders and ion chromatography (IC). Meanwhile, concentrations of NH3 and inorganic PM in one of the egg production houses were also simultaneously measured using a gas analyzer for NH3 and the filter pack plus IC method for inorganic PM. An equilibrium model-ISORROPIA II was applied to predict the behavior of inorganic aerosols in response to precursor gas concentrations and environmental parameters. Average ambient NH3 concentrations varied from 10.0 to 27.0 μg/m3, and they were negatively correlated with the distances from the ambient location to the nearest egg production house exhausts. Ambient NH3 concentrations were higher in warm seasons than in cold seasons. Measured NH3 concentrations agreed well with ISORROPIA II model predictions at all sampling stations. For the ambient stations, there was a good agreement in particle phase NH4 + between the model simulation and observations. For the in-house station, the model simulation was applied to correct the overestimation of particle phase NH4 + due to gas phase NH3 breaking through the denuders. Changes in SO4 2?, NO3 ?, and Cl? yield proportional changes in inorganic PM mass. Due to the abundance of NH3 gas in the vicinity area of the monitored farm, changes in NH3 concentrations had a small effect on inorganic PM mass. Aerosol equilibrium modeling may be used to assess the influence of precursor gas concentrations on inorganic PM formation when the measurements for some species are unavailable. 相似文献
135.
136.
Accepted practice has been to design and operate reservoirs to fill with sediment, generating benefits from remaining storage over a finite period of time. The consequences of sedimentation and project abandonment are left to the future. This 'future' has already arrived for many existing reservoirs and most others will eventually experience a similar fate, thereby imposing substantial costs on society. Such costs could be avoided if sedimentation was minimized and dams were allowed to live forever. The fact that the world's inventory of suitable reservoir sites is limited provides an additional reason for encouraging the sustainable management of dams. This paper provides a framework for assessing the economic feasibility of sediment management strategies that would allow the life of dams to be prolonged indefinitely. Even if reduced accumulation or removal of sediment is technically possible, its economic viability is likely to depend on physical, hydrological and financial parameters. The model presented incorporates such factors and allows a characterization of conditions under which sustainable management would be desirable. The empirical implementation of the model draws upon the substantial amount of technical information available. We analyze the sustainability of reservoirs, with a focus on the trade-off between such sustainability and the short to medium term benefits which a reservoir is expected to produce. The results show that, for a very wide range of realistic parameter values, sustainable management of reservoirs is economically more desirable than the prevailing practice of forcing a finite reservoir life through excessive sediment accumulation. 相似文献
137.
Saadia R. Tariq N. Shaheen A. Khalique Munir H. Shah 《Environmental monitoring and assessment》2010,163(1-4):303-312
The short-term responses of H2O2-depletion-related parameters in moss Hypnum plumaeforme to the combined stress induced by Pb and Ni were investigated. The results showed that the Pb and Ni stress induced dose-dependent accumulation of hydrogen peroxide (H2O2). The increase of peroxidase (POD) activity and decrease of ascorbate peroxidase (APX) activity were observed under the combined heavy metal application. The antioxidants, ascorbate (AsA) and proline content, increased significantly when the metals were applied together. The study indicated that the cell damage caused by Pb stress was higher than that caused by Ni stress, Pb and Ni had synergistic effect in inducing the oxidative stress in moss H. plumaeforme, especially under the combination of high concentration of Ni (0.1 and 1.0 mM) and Pb. Content of proline, H2O2 and the activity of POD, all showed a dose-dependent increase under Pb and Ni stress, suggesting their practical value as biomarkers in moss biomonitoring, especially in the case of light pollution caused by heavy metals without the changes in the appearance of mosses. 相似文献
138.
Jasmin Shah M. Rasul Jan Behisht Ara Farhat-un-Nisa Shehzad 《Environmental monitoring and assessment》2011,178(1-4):111-119
A method for the determination of herbicides residues, triazine (atrazine, metribuzin, ametryn, and terbutryn), in soil samples with high-performance liquid chromatography (HPLC)?CUV detection is described. The proposed method is based on microwave-assisted extraction (MAE) of soil samples for 4 min at 80% of 850-W magnetron outputs in the presence of mixture of solvents (methanol/acetonitrile/ethylacetate). Related important factors influencing the MAE efficiency, such as the solvent type and volume, irradiation energy, and time, were optimized in detail. Calibration curve ranges established using HPLC for metribuzin, atrazine, ametryn, and terbutryn are 1.0?C19.0, 0.9?C18.0, 0.6?C11.0, and 0.7?C11.0 µg mL???1, respectively. The limits of detection of metribuzin, atrazine, ametryn, and terbutryn are 0.30, 0.24, 0.16, and 0.20 µg mL???1 while limits of quantification are 1.0, 0.80, 0.50, and 0.60 µg mL???1, respectively. A Plackett?CBurman factorial design was used as a screening method in order to select the variables that influence MAE extraction. The recoveries of the method at three different spiked levels were assessed by analyzing real soil samples and were found to be in the range of 83.33 ± 0.12?C96.33 ± 0.23 with good precision (<8%). 相似文献
139.
Three to four billion pounds of chicken feathers are wasted in the United States annually. These feathers pose an environmental
challenge. In order to find a commercial application of these otherwise wasted feathers, composites have been prepared from
feathers. Flexural, impact resistance, and sound dampening properties of composites from chicken feather fiber (FF) and High
Density Polyethylene/Polypropylene (HDPE/PP) fiber have been investigated and compared with pulverized chicken quill-HDPE/PP,
and jute-HDPE/PP composites. Sound dampening by FF composites was 125% higher than jute and similar to quill although mechanical
properties were inferior to the latter two. In ground form, FF and jute composite properties were similar except for 34% higher
modulus of jute; under the same formulation and processing conditions, ground FF composites had nearly 50% lower mechanical
properties compared with ground quill composites. It was found that voids and density of composites have effect on mechanical
and sound dampening properties; however, no direct relationship was found between mechanical properties and sound dampening. 相似文献
140.
Developing the first halophytic turfgrasses for the urban landscape from native Arabian desert grass
Zamin Muhammad Fahad Shah Khattak Abdul Mateen Adnan Muhammad Wahid Fazli Raza Ahmad Wang Depeng Saud Shah Noor Muhammad Bakhat Hafiz Faiq Mubeen Muhammad Hammad Hafiz Mohkum Soliman Mona. H. Elkelish Amr A. Riaz Muhammad Nasim Wajid 《Environmental science and pollution research international》2020,27(32):39702-39716
Environmental Science and Pollution Research - Climate change is occurring and is influencing biological systems through augmented temperatures, more inconstant precipitation, and rising CO2 in the... 相似文献