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71.
Environmental Science and Pollution Research - Developing countries have depleted their natural resources in economic interest to achieve high economic growth. Current urbanization patterns and...  相似文献   
72.
Environmental Science and Pollution Research - Continuous incorporation of microplastics (MPs) and their fragmented residues into the ecosystem has sparked significant scientific apprehensions...  相似文献   
73.
The following areas are discussed in this paper: immobilisation of bacterial consortium in sol-gel; methyl parathion degradation and bioremediation applications; evaluation of indigenous bacterial isolates of contaminated soils. Bacterial strains were isolated from agricultural areas of Pakistan which were contaminated with methyl parathion. A bacterial consortium of seven (out of 64) Enterobacteriaceae isolates including Citrobacter, Enterobacter and Proteus vulgaris capable of degrading methyl parathion (enzyme activity ranging 410–675 mU mL?1 for individual isolates and 982 mU/mL for consortium) was selected and subsequently immobilised in tetraethyl orthosilicate (TEOS) and sodium-silicate-based sol-gel matrices. Cell viability of suspended and immobilised bacterial consortium was monitored using a minimal salt medium supplemented with methyl parathion. The results indicate that sol-gel immobilisation can be helpful to increase the shelf life of methyl parathion degrading bacterial strains along with preservation of biological activity for bioremediation applications in field.  相似文献   
74.
He Y  Xu J  Wang H  Zhang Q  Muhammad A 《Chemosphere》2006,65(3):497-505
Sorption of pentachlorophenol (PCP) by pure minerals and humic acids were measured to obtain additional perspective on the potential contributions of both clay minerals and soil organic matter (SOM) to contaminants retention in soils. Four types of common soil minerals and two kinds of humic acids (HAs) were tested. The sorption affinity for PCP conformed to an order of HAs > K-montmorillonite > Ca-montmorillonite > goethite > kaolinite. Such a difference in sorption capacity could be attributed to the crucial control of HAs. Clay minerals also had their contribution, especially K-montmorillonite, which played an important, if not dominant, role in the controlling process of PCP sorption. By removing 80% (on average) of the organic carbon from the soils with H(2)O(2), the sorption decreased by an average of 50%. The sorption reversibility had been greatly favored as well. Considering the uncharged mineral fractions in soil before and after H(2)O(2)-treated, the main variation in sorption behavior of the soil might thus be related to the removed organic carbon and the reduced pH. This testified rightly the interactive effect of SOM and clay minerals on PCP sorption as a function of pH.  相似文献   
75.
    
Anthropogenic activities that cause heavy metal contamination of agricultural soils pose a significant health risk to humans who consume contaminated agricultural foods such as rice and vegetables. The purpose of this study was to access the level of heavy metal contamination in agricultural soils in Kafin Hausa by analyzing soil samples from five different sampling sites for heavy metals including aluminum (Al), titanium (Ti), vanadium (V), manganese (Mn), chromium (Cr), iron (Fe), cobalt (Co), and zinc (Zn). A total of 15 soil samples were collected using a soil auger from various locations within Kafin Hausa area, and the concentrations of the collected soil samples were estimated using the Instrumental Neutron Activation Analysis (INAA) technique via the Nigeria Research Reactor-1. The results of the study showed that the mean concentrations of these heavy metals in the sampled soils were within the limits set by the World Health Organization. In addition, pollution indexes such as enrichment factor (EF), contamination factor (CF), and geo-accumulation index (Igeo) were adequately determined. The sampling sites were identified to have significant enrichment, except for BR3 which was moderately enriched with Al and Ti, followed by Fe, and had an EF value of 4.87. Mean Igeo values indicated that all the sampling sites were uncontaminated. Furthermore, multivariate statistics revealed a strong positive correlation (p < 0.01) and (p < 0.05) among the investigated metals, suggesting that the major sources of those metals are similar.  相似文献   
76.
    
Despite research suggesting that pro-environmental behaviors offer a range of positive benefits for organizations and that corporate social responsibility (CSR) positively affects employee behaviors and attitudes, very few studies have investigated how CSR affects pro-environmental behaviours. As such, this study investigates the impact of perceived CSR on employees' pro-environmental behaviours through organizational identification and coworkers' pro-environmental advocacy. Using a multistage sampling technique, a survey of line managers was conducted across 32 hotels in the understudied context of Malaysia's hotel industry. Based on 331 completed questionnaires, the results suggest that perceived CSR activities drive organizational identification and trigger coworkers’ pro-environmental advocacy, which in turn generate employees’ pro-environmental behaviours. The study offers valuable insights into the complex relationship between perceived CSR and pro-environmental behaviors and discusses the theoretical and research contributions and managerial implications.  相似文献   
77.
    
Prior research suggests that undertaking corporate social responsibility (CSR) activities affect firm value. We extend this line of research by considering CSR activities over a longer period (a consistent CSR behavior) and examine the impact of CSR permanency on firm value. Using a cross‐country sample of 600 top‐listed firms from four leading emerging economies, Brazil, Russia, India, and China (BRIC) over the period 2010–2018, we find that CSR permanency positively impacts firm value after controlling for various firm and country characteristics. This effect is observed more pronounced for family‐owned firms. Additional analysis reveals that permanent CSR activities in both social and environmental dimensions positively influence firm value, however, CSR permanent activities in the social dimension exert a larger impact on firm value. Our results make important contributions to theory and practice.  相似文献   
78.
    
This article integrates the global value chain literature with the micro organization literature on negative emotions to explore the drivers of fear and anger among supplier factory senior managers in apparel supply chains after Rana Plaza—a major industrial disaster—and their influence on decisions on CSR practices. Based on a comparative study around Dhaka and Lahore—two key apparel manufacturing hubs—this study elucidates that supplier factory senior managers experienced similar market tensions but different social tensions after the Rana Plaza incident. Crucially, similar market tensions helped create market fear and anger, but different social tensions led to social fear and anger in Bangladesh but not in Pakistan, therefore influencing the way supplier factory senior managers take decisions regarding CSR practices. By conceptualizing communal alignment and competitive CSR, this research finally advances the global value chain literature and contributes to the current conversations on negative emotions in organizations.  相似文献   
79.
    
Environmental Chemistry Letters - Pesticides contribute to human welfare by reducing vector-borne diseases and protecting crops against pests. Insecticides are the most widely employed pesticides...  相似文献   
80.
    
Environmental Chemistry Letters - Research has recently focused on combinational therapy using nanocarriers to overcome the obstacles associated with conventional therapy of lung cancer. The...  相似文献   
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