全文获取类型
收费全文 | 256篇 |
免费 | 9篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 7篇 |
废物处理 | 23篇 |
环保管理 | 33篇 |
综合类 | 17篇 |
基础理论 | 47篇 |
污染及防治 | 80篇 |
评价与监测 | 38篇 |
社会与环境 | 21篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 5篇 |
2022年 | 18篇 |
2021年 | 16篇 |
2020年 | 3篇 |
2019年 | 10篇 |
2018年 | 11篇 |
2017年 | 6篇 |
2016年 | 14篇 |
2015年 | 9篇 |
2014年 | 9篇 |
2013年 | 37篇 |
2012年 | 9篇 |
2011年 | 16篇 |
2010年 | 23篇 |
2009年 | 7篇 |
2008年 | 13篇 |
2007年 | 11篇 |
2006年 | 7篇 |
2005年 | 10篇 |
2004年 | 5篇 |
2003年 | 6篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1994年 | 4篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1988年 | 1篇 |
1985年 | 2篇 |
1976年 | 1篇 |
1963年 | 3篇 |
1962年 | 1篇 |
排序方式: 共有269条查询结果,搜索用时 15 毫秒
111.
Application of drastic model and GIS: for assessing vulnerability in hard rock granitic aquifer 总被引:2,自引:0,他引:2
Ranjeet Kumar Prasad V. S. Singh S. K. G. Krishnamacharyulu Pallavi Banerjee 《Environmental monitoring and assessment》2011,176(1-4):143-155
Geographic information system (GIS) has become one of the leading tools in the field of hydrogeological science that helps in assessing, monitoring, and conserving groundwater resources. Groundwater is a finite resource, which is being overexploited due to increase in demand over the years leading to decrease in its potentiality. In the present study, DRASTIC model has been used to prepare groundwater vulnerable zone in hard rock aquifer of granitic terrain. The main objective is to determine susceptible zone for groundwater pollution by integrating hydrogeological layers in GIS environment. The layers such as depth of aquifer, recharge, aquifer yield, soil type, topography, vadose zone, and transmissivity are incorporated in the DRASTIC model. The final output of the map shows that around 60% of the area falls under low to no risk of pollution zone. The high risk of pollution zones are mostly present towards the margin of southeastern periphery. The lower part of the basin as well as small area on northern side falls under moderate risk of pollution zone. For the assessment of groundwater pollution zone, 24 groundwater samples have been collected from different vulnerable zones. The chemical analysis of sample shows that the southeastern margin of basin has relatively high concentration of nitrate as compared to other parts of the basin. It is present in high pollution zone as well as moderate pollution zone. The present model can be used for assessment and management of groundwater. 相似文献
112.
Assessment of temporal variation in water quality of some important rivers in middle Gangetic plains, India 总被引:2,自引:0,他引:2
Nipunika Rani Ravindra Kumar Sinha Kriteshwar Prasad Dilip Kumar Kedia 《Environmental monitoring and assessment》2011,174(1-4):401-415
The study explains water quality of three important tributaries of the Ganga River in the middle Gangetic plains in India. Seasonal changes in the water quality of the studied rivers: Gandak, Ghaghra, and Sone were observed. During monsoon, several water quality parameters show considerable changes due to increased runoff from the catchments and other seasonal factors. Multivariate discriminant analysis delineated a few parameters responsible for temporal variation in water quality. Seasonal variation in water quality of the Gandak River was rendered by seven parameters??turbidity, sulfate, pH, phosphate, water temperature, total alkalinity, and sodium, while total alkalinity and water temperature were responsible for seasonal discrimination in water quality of Ghaghra River. Water temperature, turbidity, total dissolved solids, total suspended solids, calcium, and phosphate were important for seasonal discrimination in water quality of Sone River. The seasonal changes in water quality of the rivers were due to seasonal effects and catchment characteristics. The discriminant functions classified most of the cases correctly. 相似文献
113.
Mesozoic deposits of the former Gondwanaland are depauperate in early mammals, in general, and multituberculate mammals, in particular. Until now, the oldest multituberculate mammals known from the Gondwanan continents come from the Early Cretaceous of Morocco, NW Africa. Here, we report the presence of a new multituberculate mammal, Indobaatar zofiae gen. et sp. nov., from the Lower/Middle Jurassic Kota Formation, Pranhita-Godavari valley in peninsular India. This is the first record of a multituberculate from the Mesozoic rocks of India and possibly predates the oldest known multituberculates from Gondwanan continents. The new specimen, representing an upper premolar (P4), compares well with the upper premolar morphology of Eobaatariinae multituberculates known from the Early Cretaceous of Mongolia, China, England, and Spain. Together with the recent findings of cimolodontan multituberculates from the Early Cretaceous of Australia and Late Cretaceous of South America, the new discovery indicates a wide temporal and spatial distribution for multituberculate mammals in the former Gondwanaland. 相似文献
114.
Bhattacharya Amrik Sadaf Ayesha Dubey Swati Singh Rajesh P. Khare Sunil Kumar 《Environmental science and pollution research international》2021,28(34):46423-46430
Environmental Science and Pollution Research - In the present study, fermentative production of bacterial nanocellulose (BNC) by using Komagataeibacter xylinus strain SGP8 and characterization of... 相似文献
115.
Prasad Arani Rajendra Shankar Ramalingam Patil Chandrashekhar K. Karthick Alagar Kumar Amit Rahim Robbi 《Environmental science and pollution research international》2021,28(36):50017-50027
Environmental Science and Pollution Research - The photovoltaic (PV) for irrigation system is an emerging technology to harness the solar energy. The performance of the PV modules depends on the... 相似文献
116.
Markandeya Verma Pradeep Kumar Mishra Vibhuti Singh Neeraj Kumar Shukla Sheo Prasad Mohan Devendra 《Environmental science and pollution research international》2021,28(9):10536-10551
Environmental Science and Pollution Research - The present work aims to investigate seasonal variations in air pollution levels in Lucknow and assess the ambient air quality of the city together... 相似文献
117.
Rajak Jai Kishan Khandelwal Nitin Behera Mahima Prasad Tiwari Ekta Singh Nisha Ganie Zahid Ahmad Darbha Gopala Krishna Abdolahpur Monikh Fazel Schäfer Thorsten 《Environmental science and pollution research international》2021,28(31):41760-41771
Environmental Science and Pollution Research - Chromite ore processing residues (COPR) are real environmental threats, leading to CrO42-, i.e., Cr (VI) leaching into groundwater. It is of serious... 相似文献
118.
Is renewable energy cost‐effective? 总被引:1,自引:0,他引:1
119.
120.
R. Krishna Prasad 《Environmental Chemistry Letters》2010,8(2):149-155
The electrocoagulation studies of distillery spentwash using copper anodes were utilized to demonstrate the usefulness of
Box–Behnken experimental design of response surface analysis to derive a statistical model and the optimum parameters for
color removal. The current intensity (1.5 A), dilution (10%) and time of electrolysis (5 h) had been found to be the optimum
conditions for maximum 77.11% color removal. The actual color removal at optimized conditions was found to be 78.26%, which
is to the predicted response using response surface methodology. The energy consumption and current efficiency were determined
from reduction in chemical oxygen demand. 相似文献