全文获取类型
收费全文 | 120篇 |
免费 | 1篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 10篇 |
环保管理 | 21篇 |
综合类 | 7篇 |
基础理论 | 19篇 |
污染及防治 | 30篇 |
评价与监测 | 28篇 |
社会与环境 | 4篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 6篇 |
2021年 | 9篇 |
2020年 | 2篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2016年 | 5篇 |
2015年 | 2篇 |
2014年 | 11篇 |
2013年 | 14篇 |
2012年 | 11篇 |
2011年 | 11篇 |
2010年 | 6篇 |
2009年 | 5篇 |
2008年 | 4篇 |
2007年 | 3篇 |
2006年 | 6篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1992年 | 1篇 |
1990年 | 1篇 |
排序方式: 共有124条查询结果,搜索用时 62 毫秒
41.
Possible cause of inhibition of seed germination in two rice cultivars by heavy metals Pb2+ and Hg2+
Seeds of two rice cultivars (Oryza sativa) cv. PR-116 and Pant Dhan-12 subjected to heavy metal lead (Pb2+) and mercury (Hg2+) exposure showed an inhibition in germination percentage, shoot and root length, and lower fresh and dry weight after 7 days. Both Pb2+ and Hg2+ inhibited the solubilization process of starch due to reduction in α-amylase activity, which is also evident from greater starch content and reduced soluble carbohydrate content of endosperms of treated seeds of the two cultivars. Mercury was more tolerated by Pant Dhan-12 when grown under in vitro culture medium containing 2% sucrose. The inhibitory effect of Pb2+ on embryo growth was not only abolished but also accelerated by 2% sucrose. The inhibitory effect, however, was not significantly blocked in Hg2+-treated embryos grown in vitro in sucrose containing medium. Embryos did not grow normally in a medium devoid of sucrose in either case. Data indicated that Pb2+ inhibited germination and seedling growth by impairing the solubilization of endosperm starch without markedly affecting the embryo, while Hg2+ inhibited germination and seedling growth by damaging the embryo itself. 相似文献
42.
Mohit H. Sanjay M. R. Siengchin Suchart Khan Anish Marwani Hadi M. Dzudzevic-Cancar Hurija Asiri Abdullah M. 《Journal of Polymers and the Environment》2021,29(8):2609-2627
Journal of Polymers and the Environment - The present investigation was performed to study the effect of titanium carbide (TiC) nanoparticles and coir fiber as hybrid reinforcements on the... 相似文献
43.
Catalytic degradation of methylene blue by Fenton like system: model to the environmental reaction 总被引:2,自引:0,他引:2
Sanjay R. Thakare 《环境科学学报(英文版)》2004,16(2):285-287
To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe( Ⅲ ) and H2O2 in the absence of light instead of Fe( Ⅱ ) and H2O2 was studied. Results showed that use of Fe ( Ⅲ ) is more promising than Fe( Ⅱ ). The present study reflects that Fenton reaction is more efficient, in the presence of a small amount of salicylic acid is added which is a one of the priority pollutant. 相似文献
44.
P. Sarath Sateesh Bonda Smita Mohanty Sanjay K. Nayak 《Journal of Material Cycles and Waste Management》2017,19(4):1391-1399
The plastic components from waste mobile phones were sorted and characterized using visual, spectroscopic and thermal methods. The sustainable strength of the recovered plastics was investigated by comparing their mechanical and thermal properties with commercially used reference materials. The results revealed that the recovered polymers have significant potential to be reused. However, some properties, such as impact strength and tensile modulus, are significantly low compared to virgin materials and need further improvement. The samples were also tested for brominated flame retardants (BFRs) using gas chromatography–mass spectrometry technique, and the results indicated the absence of BFR in recovered plastics; hence, these can be processed without any risk of BFR toxicity. 相似文献
45.
Enhancing viability of biofuel-based decentralized power projects for rural electrification in India
Debajit?PalitEmail authorView authors OrcID profile Ramit?Malhotra Sanjay?Mande 《Environment, Development and Sustainability》2017,19(1):263-283
Decentralized power generation, using locally available biofuels from non-edible oilseeds, is an option for rural electrification in many developing countries. However, due to prevailing high price of non-edible oilseeds, such as Jatropha curcas, the cost of electricity generation is very high. This paper provides detailed financial analysis of straight vegetable oil (SVO)-based decentralized power project and proposes an innovative model for enhancing their financial viability. While for implementing agency operational cost recovery is the key for viability, affordable tariff is crucial for end-users. The paper attempts to estimate minimum desired price of electricity from the stakeholders' (producer and users) perspective using data gathered from selected operational SVO-based power generation projects in India. Analysis carried out in this paper indicates that operating the decentralized power plant at higher capacity utilization factor, by introduction of productive load, and differentiated tariffs for commercial and domestic consumers may not alone be sufficient to achieve the financial viability. The paper proposes an innovative integrated model of using biogas, obtained from the by-product de-oiled cake of non-edible oilseeds, as a feedstock for power generation, instead of using the SVO in engines. This reduces the fuel cost of power generation, thereby helping to bring down the tariff within the paying capacity of rural consumers. The main produce, viz. extracted non-edible oil, which was otherwise used as fuel for generating power, can be sold in local market for earning revenue, thereby enhancing the project’s economic viability. This paper sets forth the proposed integrated model as a viable biofuel-based decentralized power project for sustainable rural development in areas with adequate availability of oilseeds. 相似文献
46.
Assessment of habitat quality with relation to fish assemblages in an impacted river of the Ganges basin, northern India 总被引:1,自引:0,他引:1
In this work, we examined water-quality assessment in relation to fish assemblage of Gomti River, a large tributary of the
Ganges River basin in northern India. Principal component analysis was performed for 18 environmental variables which produced
three axes that cumulatively explained 60.23% of the environmental variation in sites. Fifteen variables (fine substrate fine
gravel, coarse gravel, cobble, sand substrate water flow, conductivity, TDS, total hardness, temperature, dissolved oxygen,
pH, and overhanging vegetation) had high loadings on at least one of the principal component axes interpreted. The canonical
correspondence analysis was used to establish the relationship between important fish species and environmental variables.
Species were distributed within four groups with respect to the significant habitat characteristics. The Pearson correlation
coefficient was calculated between the water-quality parameters. We concluded that the level of species richness is mostly
dependent on abiotic factors like temperature, dissolved oxygen, TDS, conductivity, depth, pH, and water current in the Gomti
River, of the Ganges basin. 相似文献
47.
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
48.
Sanjay Kumar Sahoo Kousik Mandal Ramandeep Kaur R. S. Battu Balwinder Singh 《Environmental monitoring and assessment》2013,185(9):7935-7943
Thiacloprid, a neonicotinoid insecticide with novel mode of action, is found to be effective against several lepidopteran as well as hemipteran pests. The present studies were carried out to observe the persistence pattern of thiacloprid on brinjal and to suggest suitable waiting period for the safety of consumers. Persistence of thiacloprid in brinjal was studied following three applications of thiacloprid (Alanto 240 SC) at 180 and 360 g a.i. ha?1 at 7 days interval. Residues of thiacloprid in brinjal were estimated by high-performance liquid chromatography and were confirmed by liquid chromatography–mass spectrometry. The average initial deposits of thiacloprid were observed to be 0.48 and 1.05 mg?kg?1 on the brinjal fruit following third application of thiacloprid at recommended and double the recommended dosages, respectively. Half-life periods for thiacloprid were found to be 0.47 and 0.50 days at single and double the application rates, respectively. Residues of thiacloprid declined below its limit of quantification of 0.05 mg?kg?1 after 3 and 5 days, respectively, at recommended and double the recommended application rates. Therefore, the use of thiacloprid does not seem to pose any risk hazard and a waiting period of 1 day is suggested for safe consumption of brinjal fruits. 相似文献
49.
Hydrochemistry of surface water (pH, specific conductance, total dissolved solids, sulfate, chloride, nitrate, bicarbonate, hardness, calcium, magnesium, sodium, potassium) in the Mahanadi river estuarine system, India was used to assess the quality of water for agricultural purposes. The samples were studied for 31 different stations during six different seasons in the years 2001-2003. Chemical data were used for mathematical calculations (SAR, Na%, RSC, potential salinity, permeability index, Kelly's index, magnesium hazard, osmotic pressure and salt index) for better understanding the suitability river water quality for agricultural purposes. The river water is free from nitrate-nitrogen hazard and has much less osmotic pressure and RSC values. Further there is no complete precipitation of calcium and magnesium in the study area. The results revealed that waters of some polluted stations like Sambalpur down (D/s of Sambalpur town) and Kathjodi (Cuttack) down (D/s of Cuttack town) are unsuitable up to some extent, where as it is quite unsuitable in case of estuarine samples during the pre-monsoon and post-monsoon seasons. The results were verified by USSL and Wilcox diagrams, which show all the fresh water zone samples (low-medium salinity with low sodium) of the study area are in the 'Excellent to good' category and are suitable to irrigate all soils for semi-tolerant and tolerant as well as sensitive crops. 相似文献
50.
We investigated the effects on the growth of the anaerobic bacterium, Clostridium sp., of the ionic liquid, 1-methoxyethyl-3-methyl imidazolium [MOEMIM]+, derived from imidazolium cation and paired with one of a variety of counter-ions, viz., tetrafluoroborate [BF4]-, hexafluorophosphate [PF6]-, trifluoroacetate [CF3COO]-, bis(trifluoromethane)sulfonamide [Tf2N]-, methane sulfonate [OMS], and 1-butyl-3-methyl imidazolium tetrafluoroborate [BMIM][BF4]. These anions, in association with [MOEMIM]+ lowered the growth rate of the bacterium, showing the following trend: [Tf2N]- ≧ [PF6]- > [BF4]- > [CF3COO]- > [OMS]−. Anions incorporating fluorine were more toxic than those without it, and their toxicity rose with an increase in the number of fluorine atoms. Also, [MOEMIM]+[BF4]- was less toxic than [BMIM]+[BF4]-, probably due to the presence of a methoxyethyl functional group integrated in the cation side chain. 相似文献