全文获取类型
收费全文 | 77篇 |
免费 | 0篇 |
国内免费 | 2篇 |
专业分类
废物处理 | 3篇 |
环保管理 | 7篇 |
综合类 | 9篇 |
基础理论 | 16篇 |
污染及防治 | 26篇 |
评价与监测 | 13篇 |
社会与环境 | 5篇 |
出版年
2023年 | 2篇 |
2022年 | 4篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 12篇 |
2012年 | 2篇 |
2011年 | 5篇 |
2010年 | 3篇 |
2009年 | 1篇 |
2008年 | 11篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2004年 | 3篇 |
2002年 | 2篇 |
2001年 | 3篇 |
1999年 | 2篇 |
1994年 | 1篇 |
1992年 | 2篇 |
1989年 | 1篇 |
1979年 | 1篇 |
1976年 | 1篇 |
1961年 | 1篇 |
1954年 | 1篇 |
排序方式: 共有79条查询结果,搜索用时 31 毫秒
71.
N. H. Ravindranath I. K. Murthy R. K. Chaturvedi K. Andrasko J. A. Sathaye 《Mitigation and Adaptation Strategies for Global Change》2007,12(6):1027-1050
Carbon forestry mitigation potential estimates at the global-level are limited by the absence or simplicity of national-level
estimates, and similarly national-level estimates are limited by absence of regional-level estimates. The present study aims
to estimate the mitigation potential for a large diverse country such as India, based on the GTAP global land classification
system of agro-ecological zones (AEZs), as well the Indian AEZ system. The study also estimates the implications of carbon
price incentive (US$50 and $100) on mitigation potential in the short-, medium- and long-term, since afforestation and reforestation
(A & R) is constrained by lack of investment and financial incentives. The mitigation potential for short and long rotation
plantations and natural regeneration was estimated using the GCOMAP global forest model for two land area scenarios. One scenario
included only wastelands (29 Mha), and the second enhanced area scenario, included wastelands plus long fallow and marginal
croplands (54 Mha). Under the $100 carbon price case, significant additional area (3.6 Mha under the wasteland scenario and
6.4 Mha under the enhanced area scenario) and carbon mitigation is gained in the short-term (2025) compared to the baseline
when using the GTAP land classification system. The area brought under A & R increases by 85–100% for the $100 carbon price
compared to $50 carbon price in the short-term, indicating the effectiveness of higher carbon price incentives, especially
in the short-term.
A comparison of estimates of mitigation potential using GTAP and Indian AEZ land classification systems showed that in the
short-term, 35% additional C-stock gain is achieved in the $100 carbon price case in the enhanced area scenario of the Indian
AEZ system. This difference highlights the role of the land classification system adopted in estimation of aggregate mitigation
potential estimates, particularly in the short-term. Uncertainty involved in the estimates of national-level mitigation potential
needs to be reduced, by generating reliable estimates of carbon stock gain and losses, and cost and benefit data, for land
use sector mitigation options at a scale disaggregated enough to be relevant for national mitigation planning. 相似文献
72.
73.
Cycling of volatile organic sulfur compounds in anaerobically digested biosolids and its implications for odors. 总被引:4,自引:0,他引:4
Matthew J Higgins Yen-Chih Chen Douglas P Yarosz Sudhir N Murthy Nick A Maas Dietmar Glindemann John T Novak 《Water environment research》2006,78(3):243-252
The objectives of this research were to elucidate the mechanisms for production and degradation of volatile organic sulfur compounds (VOSCs), key odor causing compounds produced by biosolids. These compounds included methanethiol (MT), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS). A series of experiments were used to probe various pathways hypothesized to produce and degrade these VOSCs. The production of MT was found to mainly occur from degradation of methionine and the methylation of hydrogen sulfide. DMS was formed through the methylation of MT. DMDS was formed by MT oxidation. All three of the VOSCs were readily degraded by methanogens and a cyclic pathway was proposed to describe the production and degradation of VOSCs. The research demonstrated that the main source of VOSCs was the biodegradation of protein within the biosolids and the results provided a framework for understanding the production of odor from anaerobically digested sludges before and after dewatering. 相似文献
74.
S. P. Pathak S. Kumar P. W. Ramteke R. C. Murthy J. W. Bhattacherjee K. Gopal 《Environmental monitoring and assessment》1994,33(2):151-160
A total of 1094 water samples from 326 springs, 207 streams, 183 dug wells, 151 piped supplies, 90 tube wells, 75 hand pumps, 60 rivers and 2 lakes were collected from eight northern and six north-eastern districts of India. Samples were analysed to assess their potability by estimating the level of heavy metals and bacterial (coliform and faecal coliform) contaminations. Iron was found in a maximum number (53%) of water samples from hand pumps, followed by lead in 43% of the tube wells, chromium in 16% of dug wells, cadmium in 13% of streams and manganese in 7% of hand pumps above their maximum admissible concentrations (MACs). Maximum metal pollution has been observed in a considerable number of water samples from Doda, followed by Almora, Mirzapur and Bankura. Hand pump water samples exhibited maximum metal pollution followed by dug well, spring, stream and river water samples. Contamination of coliform and/or faecal coliform bacteria ranged between 41% and 67% of water samples from open water sources but it was also less, i.e. 6–15% of water samples from tube wells and hand pumps. In general, 42–85% of water samples from districts surveyed, except from Jammu (18%) and Mirzapur (27%), were found to be bacteriologically unsatisfactory. Since toxic metals and pathogenic bacteria pose a risk to public health, monitoring of drinking water sources is required. 相似文献
75.
Singh KP Singh VK Malik A Sharma N Murthy RC Kumar R 《Environmental monitoring and assessment》2007,131(1-3):237-254
Rain water samples were collected to study the chemical composition of wet atmospheric precipitation (first event) over the
Lucknow city in the northern Indo-gangetic alluvial plains. The samples were collected in the month of July, 2005 from different
sites. The wet precipitation samples were analyzed for pH, EC, major ions (, Cl−, , , , F−, Na+, K+, Ca2+, Mg2+, ) and heavy metals (As, Cd, Al, Co, Cr, Cu, Fe, Mn, Mo, Ni, Hg, Pb, Se, Sn, Ti, V, Zn). The pH values of wet precipitation
samples ranged between 6.5 and 8.7. The analysis of linear regression applied to the set of studied variables and computation
of neutralization factors showed that neutralization occurred in precipitation samples and Ca2+ had the maximum neutralization capacity. It was found that Cl−, , Ca2+, Mg2+, Na+ and K+ in the precipitation samples originated mainly from crustal/anthropogenic sources in the region. On an average Fe, and Al
accounted for >72% of the total concentration of trace metals in the wet precipitation samples followed by Zn (>10%). Enrichment
factors calculated for heavy metals over reference background level in seawater and Earth’s crust showed relatively higher
enrichment of Zn. The principal component analysis (PCA) identified the possible sources of ionic species and heavy metals
in the wet precipitation samples. 相似文献
76.
K. Devi C. S. Vijaya Lakshmi M. C. Raicy P. Srinivasan S. G. N. Murthy S. M. Hussain Ilya Buynevich Rajesh R. Nair 《Journal of Coastal Conservation》2013,17(1):167-178
The refraction of the 2004 Indian Ocean tsunami waves caused drastic devastation along East coast of India, mainly in the area of investigation. Here, we appraise and integrate the sedimentary characteristics and microfossil studies of the area. The gigantic tsunami waves caused the landward fining of sediments that were carried as suspended load. Tsunami sediments have distinctive characteristics, like fine-to-medium grained sand, moderately to poorly sorted sediments which indicating sudden winnowing followed by tranquil flood. Positively skewed grain size distribution indicating unidirectional transport, and mesokurtic to platykurtic character implying poorly sorted single source origin. The species of benthonic foraminifers and ostracods reside in marine environment indicating shallow water origin of sediments. The onshore deposits are vertically divided into three depositional units interpreted from Ground Penetrating Radar (GPR) signatures—Unit 1 is a relatively continuous parallel layer indicative of calm environment; Unit 2 has paleochannels and burial scarps, seen as oblique reflections that might be indicative of an intense erosional environment; Unit 3 is interpreted as 2004 tsunami layer, has three subunits. Each main units have been separated by Heavy Mineral Concentrated (HMC) layers, deposited by continuous wave action (~?20 cm) and by the tsunami (>?30 cm) activity, evidenced by low magnetic susceptibility values at the bottom compared to the top of the HMC layers. GPR has been effectively utilized in this paper as subsurface imaging tool for the interpretation and reconstruction of stratigraphy, and also helped to unearth the erosional and depositional environments. 相似文献
77.
Ravi Babu Kalahasthi Rajmohan Hirehal Raghavendra Rao Rajan Bagalur Krishna Murthy M. Karuna Kumar 《毒物与环境化学》2013,95(2):393-400
The objective of this study was to determine the effect of nickel (Ni) exposure on serum amylase activity in nickel-plating workers in Bangalore (India). Sixty-nine subjects using Ni during the electroplating process formed the exposed group. An equal number of age- and sex-matched subjects working in the administration section formed the control group. Urine Ni levels were determined using a flameless atomic absorption spectrophotometer. Serum amylase activity was determined using spectrophotometric method with 2-chloro-4-nitrophenyl-α-D-maltotrioside as substrate. A significant increase in urine Ni and serum amylase activity was noted in nickel platers as compared with the control group. The level of serum amylase activity was positively and significantly associated with Ni content in urine of nickel platers. Stepwise multiple regression analysis was used to assess the effects of Ni exposure, life style confounding factors and presence of gastrointestinal problems on serum amylase activity. The analysis showed that the subjects who had urine Ni levels beyond 10?µg?g?1 of creatinine, nickel platers category, smoking and body mass index variables were significantly associated with serum amylase activity. The results of this study suggest that the increased serum amylase activity observed in nickel-exposed subjects could be used as a biomarker for investigating pancreatic function in Ni exposure. 相似文献
78.
Nigam Sonal Singh Rachana Bhardwaj Sheetal Kaushik Sami Rokkayya Nikolova Maria P. Chavali Murthy Sinha Surbhi 《Journal of Polymers and the Environment》2022,30(3):785-809
Journal of Polymers and the Environment - Algae are an enormous source of polysaccharides and have gained much interest in human flourishing as organic drugs. Algal polysaccharides have aroused... 相似文献
79.
Theerthagiri Jayaraman Park Juhyeon Das Himadri Tanaya Rahamathulla Nihila Cardoso Eduardo S. F. Murthy Arun Prasad Maia Gilberto Vo Dai‑Viet N. Choi Myong Yong 《Environmental Chemistry Letters》2022,20(5):2929-2949
Environmental Chemistry Letters - The electrocatalytic reduction of nitrate waste into ammonia allows both the removal of nitrate contaminants and an alternative production of ammonia compared to... 相似文献