全文获取类型
收费全文 | 208篇 |
免费 | 1篇 |
国内免费 | 6篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 14篇 |
环保管理 | 14篇 |
综合类 | 25篇 |
基础理论 | 43篇 |
污染及防治 | 50篇 |
评价与监测 | 40篇 |
社会与环境 | 20篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 5篇 |
2022年 | 20篇 |
2021年 | 7篇 |
2020年 | 4篇 |
2019年 | 2篇 |
2018年 | 9篇 |
2017年 | 8篇 |
2016年 | 12篇 |
2015年 | 1篇 |
2014年 | 8篇 |
2013年 | 34篇 |
2012年 | 7篇 |
2011年 | 14篇 |
2010年 | 13篇 |
2009年 | 7篇 |
2008年 | 9篇 |
2007年 | 6篇 |
2006年 | 10篇 |
2005年 | 5篇 |
2004年 | 5篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 4篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1961年 | 1篇 |
1959年 | 1篇 |
1958年 | 2篇 |
1957年 | 2篇 |
排序方式: 共有215条查询结果,搜索用时 46 毫秒
141.
142.
Linuron samples at 75mg/L concentration were photolyzed with ultraviolet lamps or with natural sunlight. Ten photoproducts were identified and yields were determined for the more significant photoproducts resulting from either sunlight or ultraviolet lamp photolysis. 相似文献
143.
Ravindra Soni Anil Kapri M. G. H. Zaidi Reeta Goel 《Journal of Polymers and the Environment》2009,17(4):233-239
Seventeen bacterial isolates were screened for the utilization of low density polyethylene (LDPE) as the sole carbon source,
out of which five potential strains were selected for the development of a consortium. In vitro biodegradation efficiency
of the consortium was studied for two differently textured forms of LDPE viz. non-poronized and poronized. Although, both the forms were acted-upon well by the consortium, but the degradation was found
to be better in the poronized form. This was substantiated by λ-max shift, FTIR spectra and simultaneous TG-DTG-DTA. The analysis
revealed the breakage and formation of chemical bonds in the polymer backbone, as a result of microbial activity. The biodegraded
samples of non-poronized and poronized LDPE exhibited similar weight losses at 400 °C (24.12% and 24.48%, respectively) as
compared to their controls (4% and 4.5% respectively), but the latter could achieve it with greater ease as reveled by its
lower heat of reactions (ΔH values). The study signifies the influence of poronization of polyethylene on its rate of biodegradation. 相似文献
144.
Aluminum and its salts widely used in our daily life have been reported nephrotoxic to humans and animals following prolonged exposure. Therefore, the present study was made to examine the renoprotective role of Spirulina platensis against Al3+ and AlF3 in male Swiss albino mice. Exposure to these chemicals decreased feed and water intake, and body and kidney weights. Histology of kidney and their biochemistry were also markedly altered along with that of serum biochemistry. Spirulina not only minimize toxic effects of test chemicals but also favored faster recovery of treated mice after their withdrawal. 相似文献
145.
Levels of elements in the surficial estuarine sediments of the Hugli River, northeast India and their environmental implications 总被引:1,自引:0,他引:1
Kumar Sarkar S Francisković-Bilinski S Bhattacharya A Saha M Bilinski H 《Environment international》2004,30(8):1089-1098
The present paper is the first document of a detailed geochemical and mineralogical study of muddy to sandy mud estuarine sediments of the Hugli River collected from five different sites along its course in the coastal areas of West Bengal, northeast India. The present work attempts to establish the status of distribution and environmental implications of 52 elements in the surficial estuarine sediments and their possible sources of derivation. The level of both metallic and non-metallic elements shows a wide range of variation all along the course of the estuary and can be attributed to their differential derivation from the source rocks and differential discharge of untreated effluents originating from industrial, agricultural, aquacultural as well as domestic sewage. The element contents, particularly the heavy metal content in the sediments, are the lowest in the upstream part of the estuary at Diamond Harbor, whereas, these are slightly higher in the intermediate stretch of the estuary at Haldia to highest in the mouth of estuary at Gangasagar. These changes indicate that the metals that are carried from upstream find their ultimate depositional sink at the delta mouth near Gangasagar, where almost all the elements showed elevated values. The majority of the elements have their highest concentrations at Canning, a site within the tidal channel network of the Hugli-Matla drainage basin away from the direct influence of the Hugli River. This site is severely contaminated with huge organic load from domestic sewage, aquaculture, intensive trawling activities and agricultural runoff. Moreover, the site suffers from heavy siltation load causing an almost moribund condition of Matla River at this point. Equi-dimensional quartzo-feldspathic mineral grains are consistent components in the siliciclastic composition of the sediments and their sizes at each station are controlled by respective hydrodynamic conditions. Various flaky minerals (mica, chlorite, hornblende) are also present but show inconsistent patterns of distribution. These flaky minerals remain in suspension for a long time and do not follow the usual law of settling of particles depending on the hydrodynamic regime prevailing in the area. Presented data will serve as a baseline against which future anthropogenic effects may be assessed. A comprehensive account of heavy metal content in sediments from different coastal regions of peninsular India has also been presented for purpose of comparison. 相似文献
146.
147.
Kinetics of phenol and m-cresol biodegradation by an indigenous mixed
microbial culture isolated from a sewage treatment plant 总被引:2,自引:1,他引:1
An acclimatized mixed microbial culture, predominantly Pseudomonas sp., was enriched from a sewage treatment plant, and its
potential to simultaneously degrade mixtures of phenol and m-cresol was investigated during its growth in batch shake flasks. A 22 full
factorial design with the two substrates at two di erent levels and di erent initial concentration ranges (low and high), was employed
to carry out the biodegradation experiments. The substrates phenol and m-cresol were completely utilized within 21 h when present at
low concentrations of 100 mg/L for each, and at high concentration of 600 mg/L for each, a maximum time of 187 h was observed
for their removal. The biodegradation results also showed that the presence of phenol in low concentration range (100–300 mg/L)
did not inhibit m-cresol biodegradation. Whereas the presence of m-cresol inhibited phenol biodegradation by the culture. Moreover,
irrespective of the concentrations used, phenol was degraded preferentially and earlier than m-cresol. A sum kinetics model was used
to describe the variation in the substrate specific degradation rates, which gave a high coe cient of determination value (R2 > 0.98) at
the low concentration range of the substrates. From the estimated interaction parameter values obtained from this model, the inhibitory
e ect of phenol on m-cresol degradation by the culture was found to be more pronounced compared to that of m-cresol on phenol. This
study showed a good potential of the indigenous mixed culture in degrading mixed substrate of phenolics. 相似文献
148.
An acclimatized mixed microbial culture, predominantly Pseudomonas sp., was enriched from a sewage treatment plant, and its potential to simultaneously degrade mixtures of phenol and m-cresol was investigated during its growth in batch shake flasks. A 22 full factorial design with the two substrates at two different levels and different initial concentration ranges (low and high), was employed to carry out the biodegradation experiments. The substrates phenol and m-cresol were completely utilized within 21 h when present at low concentrations of 100 mg/L for each, and at high concentration of 600 mg/L for each, a maximum time of 187 h was observed for their removal. The biodegradation results also showed that the presence of phenol in low concentration range (100–300 mg/L) did not inhibit m-cresol biodegradation. Whereas the presence of m-cresol inhibited phenol biodegradation by the culture. Moreover, irrespective of the concentrations used, phenol was degraded preferentially and earlier than m-cresol. A sum kinetics model was used to describe the variation in the substrate specific degradation rates, which gave a high coefficient of determination value (R2 > 0.98) at the low concentration range of the substrates. From the estimated interaction parameter values obtained from this model, the inhibitory effect of phenol on m-cresol degradation by the culture was found to be more pronounced compared to that of m-cresol on phenol. This study showed a good potential of the indigenous mixed culture in degrading mixed substrate of phenolics. 相似文献
149.
Samanta S Mitra K Chandra K Saha K Bandopadhyay S Ghosh A 《Journal of environmental biology / Academy of Environmental Biology, India》2005,26(3):517-523
The paper deals with the measurement of five heavy metals viz., Cd, Cu, Mn, Pb and Zn in water of the rivers Hooghly and Haldi at Haldia during June 1999 to October 2002. The industrial effluent out fall (OF) at Patikhali, Haldia was also taken as sampling site along with above out fall (AOF) and below out fall (BOF) sites. Most of the metals exhibited their least concentration at the sampling site above the Haldia industrial area of river Hooghly. The average concentrations of the studied metals were Cd 2-14, Cu 5-19, Mn 8-88, Pb 17-41 and Zn 22-37 microg l(-1). Comparison of the data with the Criterion Continuous Concentration (CCC) of USA revealed that Cd, Cu and Pb were the pollutants present at alarming level to disturb the aquatic life process in the zone. The effect was found to reflect on the tissue level aberrations in the residential fishes. The other two metals viz., Mn and Zn were probably less harmful to the aquatic ecosystem. In India, necessity is felt to develop the CCC values, which will be more appropriate for protection of aquatic environment than comparing with drinking water standards. 相似文献
150.
The efficiency of self-manufactured activated carbon (AC) produced from oat hulls in adsorbing arsenic(V) was tested in a batch reactor. The results indicated that the adsorptive capacity of AC was affected by initial pH value, with adsorption capacity decreasing from 3.09 to 1.57 mg As g(-1) AC when the initial pH values increased from 5 to 8. A modified linear driving force model conjugated with a Langmuir isotherm was created to describe the study's kinetics. The test results show that rapid adsorption and slow adsorption exist simultaneously when AC is used to remove arsenic(V). 相似文献