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361.
Kumar Amit Shandilya Pooja Vo Dai-Viet N. Sharma Gaurav Naushad Mu. Dhiman Pooja Stadler Florian J. 《Environmental Chemistry Letters》2022,20(1):597-632
Environmental Chemistry Letters - Providing sustainable energy and cleaning water pollution are actually major societal issues requiring new catalysts. In particular, transition... 相似文献
362.
Sharma Padma Rathee Sonia Ahmad Mustaqeem Batish Daizy R. Singh Harminder P. Kohli Ravinder K. 《Environmental science and pollution research international》2022,29(38):57102-57111
Environmental Science and Pollution Research - Toxic contaminants (metals and metal-containing compounds) are accumulating in the environment at an astonishing rate and jeopardize human health.... 相似文献
363.
The fermentation characteristics of six specific types of the organic fraction of municipal solid waste (OFMSW) were examined, with an emphasis on properties that are needed when designing plug-flow type anaerobic bioreactors. More specifically, the decomposition patterns of a vegetable (cabbage), fruits (banana and citrus peels), fresh leaf litter of bamboo and teak leaves, and paper (newsprint) waste streams as feedstocks were studied. Individual OFMSW components were placed into nylon mesh bags and subjected to various fermentation periods (solids retention time, SRT) within the inlet of a functioning plug-flow biogas fermentor. These were removed at periodic intervals, and their composition was analyzed to monitor decomposition rates and changes in chemical composition. Components like cabbage waste, banana peels, and orange peels fermented rapidly both in a plug-flow biogas reactor (PFBR) as well as under a biological methane potential (BMP) assay, while other OFMSW components (leaf litter from bamboo and teak leaves and newsprint) fermented slowly with poor process stability and moderate biodegradation. For fruit and vegetable wastes (FVW), a rapid and efficient removal of pectins is the main cause of rapid disintegration of these feedstocks, which left behind very little compost forming residues (2–5%). Teak and bamboo leaves and newsprint decomposed only to 25–50% in 30 d. These results confirm the potential for volatile fatty acids accumulation in a PFBR’s inlet and suggest a modification of the inlet zone or operation of a PFBR with the above feedstocks. 相似文献
364.
Sehgal Aayush Behl Tapan Kaur Ishnoor Singh Sukhbir Sharma Neelam Aleya Lotfi 《Environmental science and pollution research international》2021,28(32):43102-43113
Environmental Science and Pollution Research - Inflammasome activity plays a vital role in various non-microbial disease states correlated with prolonged inflammation. NLRP3 inflammasome function... 相似文献
365.
366.
Since a considerable amount of fluoride (Fl) intake also takes place through the ingestion of foods that are grown in the contaminated soil and irrigated with elemental contaminated water, this may lead to higher risk from Fl-mediated toxicity. Therefore, in the present study, a systematic delineation and characterization of Fl in agricultural tube wells in Unnao District, India, were carried out to examine seasonal variations of this element using graphical and multivariate statistical approach. The results suggested that different natural hydro-geochemical processes such as weathering of silicates, carbonates, and various ion exchange processes are the key factors responsible for the geochemistry of the groundwater in addition to the alkalinity of water. Of the water sampled, 27.3% and 18.2% were contaminated with Fl exceeding the desirable limit of 1 mg/L as prescribed by Bureau of Indian Standards during pre-monsoon and post-monsoon season. Fluoride displayed a significant positive correlation during both seasons and the water type of the majority of the samples in both seasons was bicarbonate. 相似文献
367.
The present study was designed to evaluate the possible adverse effects of acephate, an organophosphate insecticide, on hematological parameters in male albino rats. Acephate was administered orally to rats at either 25, 50, or 75 mg/kg bwt/day for 30 days. Data showed a significant decrease in total erythrocyte count, hemoglobin concentration, and hematocrit value; however, an increase in total leukocyte count was noted. The levels of blood sugar and blood urea were significantly elevated when administered by acephate. There were no significant changes in mean corpuscular hemoglobin, mean corpuscular volume, and mean corpuscular hemoglobin concentration for all doses. Thus, obtained results collectively revealed that acephate administration produced significant alterations in hematological parameters in dose-dependent manner. 相似文献
368.
A polyaniline Zr(IV) selenotungstophosphate nanocomposite was prepared via sol-gel method and characterized by thermogravimetric analysis, scanning electron microscopy, energy dispersive X-ray spectroscopy, and transmission electron microscopy. The combined sorptional–photocatalytic activity of the nanocomposite for degradation of methylene blue and malachite green was investigated and was found to be more efficient than separate adsorption in the dark followed by photocatalysis. The dyes were degraded in 3 h by 96% and 89% by the combined process, as compared to 86% and 72% by the two-step process in 5 h. The nanocomposite material showed antimicrobial activity against Staphylococcus aureus and Escherichia coli. 相似文献
369.
Atalanta Narayan Chowdhury S.K. Manna A.P. Sharma C. Bandopadhyay K. Pramanik 《毒物与环境化学》2015,97(5):538-551
The study aimed to examine the contamination status of arsenic (As) in excavated small water bodies, commonly known as ponds – the integral part of daily life in the arsenic-affected rural areas of West Bengal, India in comparison to the unaffected areas. The ponds of the contaminated area had higher levels of As: water 2–174 µg L?1 (mean 31 ± 2 µg L?1) and sediment 1.3–37.3 mg kg?1 (mean 10.3 ± 0.4 mg kg?1), than those from the unaffected area: water 1–8 µg L?1 (mean 4 ± 0 µg L?1) and sediment 1.4–5.3 mg kg?1 (mean 3.0 ± 0.1 mg kg?1). A moderate positive correlation was observed between the water and sediment arsenic content of the ponds of the arsenic-affected region (r = 0.688, n = 277, p < 0.0001). Contaminated ground water, either as direct input or through agricultural washings, was found to be the major contributor of arsenic pollution to these ecosystems. Seasonal variations were not prominent. This study emphasized the beneficial role of using the studied ecosystems over the highly contaminated ground water for various livelihood activities in the Gangetic delta region. 相似文献
370.
Atmospheric deposition studies of heavy metals in Arctic by comparative analysis of lichens and cryoconite 总被引:1,自引:0,他引:1
Shiv Mohan Singh Jagdev Sharma Puja Gawas-Sakhalkar Ajay K. Upadhyay Simantini Naik Shailesh M. Pedneker Rasik Ravindra 《Environmental monitoring and assessment》2013,185(2):1367-1376
Lichens and cryoconite (rounded or granular, brownish-black debris occurring in holes on the glacier surface) from Ny-Ålesund were used for understanding the elemental deposition pattern in the area. Lichen samples collected from low-lying coastal region and cryoconite samples from high altitudinal glacier area were processed and analysed for elements such as aluminium (Al), arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), cesium (Cs), copper (Cu), iron (Fe), manganese (Mn), nickel (Ni), lead (Pb), vanadium (V) and zinc (Zn) through inductively coupled plasma mass spectrometry. Results showed that heavy metals, Al and Fe, are present in high concentration in the cryoconite samples. Al was also present in high amounts in seven of the eight lichen samples studied. The general scheme of elements in the decreasing order of their concentrations for most of the cryoconite samples was Al?>?Fe?>?Mn?>?Zn?>?V?>?Pb?>?Cr?>?Ni?>?Cu?>?Co?>?As?>?Cs?>?Cd while that for the lichen samples was Al?>?Fe?>?Zn?>?Mn?>?Pb?>?Cu?>?Cs?>?Cr?>?Ni?>?V?>?Co?>?As?>?Cd. Similarity in trends in the two sample types confirms that the environment indeed contains these elements in that order of concentration which overtime got accumulated in the samples. Overall comparison showed most elements to be present in high concentrations in the cryoconite samples as compared to the lichen samples. Within the lichens, elemental accumulation data suggests that the low-lying site (L-2) from where Cladonia mediterranea sample was collected was the most polluted accumulating a number of elements at high concentrations. The probable reasons for such deposition patterns in the region could be natural (crustal contribution and sea salt spray) and anthropogenic (local and long-distance transmission of dust particles). In the future, this data can form a baseline for monitoring quantum of atmospheric heavy metal deposition in lichens and cryoconite of Svalbard, Arctic. 相似文献