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51.
Latif Aref Amir H. Navarchian Daniyal Dadkhah 《Journal of Polymers and the Environment》2017,25(3):628-639
Poly(acrylamide-co-maleic acid)/montmorillonite nanocomposites, were synthesized via in situ polymerization with different maleic acid and MMT content. The capability of the hydrogel for adsorption of crystal violet (CV) was investigated in aqueous solutions at different pH values and temperatures. The pseudo-second-order kinetics model could fit successfully the adsorption kinetic data. The effects of maleic acid to acrylamide molar ratio (MAR), weight percent of MMT (MMT%), the pH of medium and the solution temperature (T) on the CV adsorption capacity (q e ) of adsorbents were studied by Taguchi experimental design approach. The results indicated that increasing the MMT% leads to a greater q e . The q e value of adsorbents increased also with increasing both MAR and pH, while reduced when the temperature of medium increased. The relatively optimum conditions to achieve a maximum CV adsorption capacity for P(AAm/MA)/MMT adsorbents were found as: 0.06 for MAR and 5 % of MMT%, medium pH = 7 and T = 20 °C. 相似文献
52.
Hossein Kamani Mohammad Hoseini Gholam Hossein Safari Jalil Jaafari Amir Hossein Mahvi 《Environmental monitoring and assessment》2014,186(8):5059-5067
In this study, measurements of the trace metals Zn, Cd, Cr, Ni, Pb, Cu, Fe and Al were performed on 53 wet atmospheric precipitation samples (snow and rainwater) collected at a central site of Tehran. Samples were collected using a bulk sampler equipped with a high-density polyethylene funnel from November to May in 2011 and 2012 on the roof of a building in the city centre. Trace metals in the filtered samples were measured with ICP-MS. Statistical analysis of the results revealed that Al, which is principally a crustal-derived element, was the highest mean measured concentration. The pH ranged from 4.2 to 7.1 with a mean value of 5.1. Crustal enrichment factors (EFc) related to the relative abundance of elements in crustal material was calculated using Al as reference crustal. EFc calculations indicated that samples were not enriched with Fe and Cr but were, fairly to extremely, enriched with Zn, Cd, Ni, Pb and Cu. Factor component analysis with varimax-normalized rotation was conducted to find the probable sources of the measured species. This resulted in two factors with eigenvalues greater than unity. Factor 1 showed an anthropogenic source, mostly industrial combustion and local traffic emissions, for Zn, Cd, Ni, Pb, and Cu while factor 2 showed a crustal contribution for Al, Fe and Cr. 相似文献
53.
Mariam?Ameli Saeed?MansourEmail author Amir?Ahmadi-Javid 《Environment, Development and Sustainability》2017,19(6):2443-2456
In today’s competitive market, corporations have learned that taking sustainability issues into account can significantly improve their public image. Modern producers therefore must simultaneously reduce the environmental impact of their products and make economic gains. Therefore, making trade-offs between economic and environmental issues is required to ensure a company’s continuity. In doing so, companies have attached a great deal of importance to the new product design phase. However, optimization at the design stage becomes very complex for a product with a large number of parts, which can have several design alternatives with similar forms and functionality, but different costs and environmental impacts. In the automobile, shipbuilding and aircraft industries, if the conventional complete enumeration method is applied, the time required for selecting the optimal combination of design alternatives with respect to life cycle cost and environmental impact may exceed a human’s natural life span. To overcome this limitation, this paper introduces an optimization method for use as a design aid tool that enables a designer to assess the life cycle cost and environmental impact of his/her design very early in the product development process. To support the developed method, an illustration is provided using a case study on a locally manufactured automobile. 相似文献
54.
55.
Azari Prisa Bostani Abdol Amir 《Environmental science and pollution research international》2017,24(25):20438-20445
Environmental Science and Pollution Research - Different methods, including the use of nanoscale zero-valent iron (NZVI), have been used to treat arsenic (As)-contaminated environments, with much... 相似文献
56.
Hadei Mostafa Mesdaghinia Alireza Nabizadeh Ramin Mahvi Amir Hossein Rabbani Shahram Naddafi Kazem 《Environmental science and pollution research international》2021,28(11):13055-13071
Environmental Science and Pollution Research - This study has systematically reviewed all of the research articles about the photocatalytic degradation of pesticides using titanium dioxide (TiO2)... 相似文献
57.
Amir González-Delgado Manoj K. Shukl David W. DuBois Juan P. Flores-Márgez Joel A. Hernández Escamill Evangelina Olivas 《环境科学学报(英文版)》2017,29(3):207-216
Particulate matter(PM) emissions from various sources can affect significantly human health and environmental quality especially in the Chihuahuan Desert region along US–Mexico border. The objective of this study was to use the low-cost sticky tape method to collect airborne PM for size characterization and identification of fungal spores. Sticky tape samplers were placed at 1.0 and 2.0 m above the ground surface at experimental sites in Ciudad Juárez, Mexico and at 0.6, 1.2 and 1.8 m at New Mexico sites, USA. Soil samples were collected in both countries to determine fungal diversity, texture and moisture content Dust particles collected from all of the experimental sites had a dominant texture of clay( 0.002 mm). The dominant textures identified from soil samples collected from the US and Mexican sites were loam and sandy clay loam, respectively. Alternaria, Penicillium and Fusarium were frequently found funguses in the US sites while Alternaria and Aspergillus were commonly observed in the Mexican sites. The sticky tapes also showed a similar diversity of fungal microorganisms present in the airborne PM at both Mexico and US sites Alternaria, Penicillium and Aspergillus were the three groups of airborne fungal microorganisms consistently present in the US and Mexican sites. The low-cost sticky tape method has the potential to be used for characterizing different airborne microorganisms and dust particles. 相似文献
58.
Almerindo D. Ferreira Amir Farimani Antonio C. M. Sousa 《Environmental Fluid Mechanics》2011,11(2):167-181
Erosion is a common phenomenon in nature, and it may cause a wide range of problems such as air pollution, and destruction
of agricultural land, shelters and stockpiles. The present work deals with stockpiles, which have their profiles described
by a sinus function or by similar trigonometric functions. Analysis of the erosion by air flow over these piles will provide
for further understanding of the erosion underlying mechanisms and, moreover, how to control them and eventually to prevent
them. To this purpose, different experimental tests are conducted for a pile with a sinuous profile, and particular attention
is given to the time development of the profile due to the erosion process; the effect of the air velocity is also studied
by selecting different velocities. In addition, the flow over several deformed piles is numerically predicted using the CFX
software; the results clearly show the erosion process is strongly dependent upon time, velocity field and surface disturbances.
A correlation between the erosion rate and the velocity is proposed. 相似文献
59.
Investigation of the possible sources of heavy metal contamination in lagoon and canal water in the tannery industrial area in Dhaka, Bangladesh 总被引:2,自引:0,他引:2
60.
Mohammad Khandan Maryam Maghsoudipour Shahram Vosoughi Amir Kavousi 《International journal of occupational safety and ergonomics》2013,19(4):523-530
One of the most important ways to prevent accidents is to consider safety climate or culture. Moreover, some studies suggest that behavior contributes to 86%-96% of all injuries. This cross-sectional study took place in an Iranian petrochemical company in 2010. Vinodkumar and Bhasi’s safety climate questionnaire and an ergonomic behavior sampling checklist were the data collection tools. Cronbach’s a for questionnaire reliability was .928. With reference to the results of a pilot study, a sample of 1755 was determined for behavior sampling. We used principal component analysis (PCA) to derive the coefficient of paths in the path model and the Anderson-Rabin method to calculate factor scores. The results showed that safety climate was an effective predictor of ergonomic behavior (p < .01). They also showed the importance of decreasing the number of workers with negative safety climate. Moreover, it is necessary to promote workers’ ergonomic behaviors in the workplace. 相似文献