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91.
Arifeen Waseem-ul- Rehman Fazal-Ur- Adeel Shahid Zuber Muhammad Ahmad Mirza Nadeem Ahmad Tanvir 《Environmental science and pollution research international》2021,28(36):49958-49966
Environmental Science and Pollution Research - Environmental friendly products particularly natural dyes are going to be much popular around the globe due to their non-toxic and bio-degradable... 相似文献
92.
Abd Ammar Ali Othman Mohd Roslee Kim Jinsoo 《Environmental science and pollution research international》2021,28(32):43329-43364
Environmental Science and Pollution Research - The atmosphere security and regulation of climate change are being continuously highlighted as a pressing issue. The crisis of climate change owing to... 相似文献
93.
94.
Hakim MA Juraimi AS Hanafi MM Selamat A Ismail MR Karim SM 《Journal of environmental biology / Academy of Environmental Biology, India》2011,32(5):529-536
An investigation was made to see the salt tolerance of 10 weed species of rice. Properly dried and treated seeds of weed species were placed on 9 cm diameter petridishes lined with Whatman No. 1 filter paper under 6 salinity regimes, viz. 0 (control), 4, 8, 16, 24 and 32 dS m(-1). The petri dishes were then kept in germinator at 25 +/- 1.0 degrees C and 12 hr light. The number of germinated seeds were recorded daily. The final germination percentage, germination index (GI), seedling vigour index, mean germination time and time for 50% germination were estimated. Root and shoot lengths of the weed seedlings were measured at 20 days after salt application and relative growth values were calculated. Results revealed that salinity decreased final germination percentage, seed of germination as measured by GI, and shoot and root length in all the species. Germination of most of the weed seeds was completely arrested (0) at 32 dS m(-1) salinity except in E. colona (12%) and C. iria (13.9%). The species C. iria, E. colona, J. linifolia and E. crusgalli showed better germination (above 30%) upto 24 dS m(-1) salinity level and were regarded as salt-tolerant weed species. J. linifolia, F. miliacea, L. chinensis and O. sativa L. (weedy rice) were graded as moderately tolerant and S. zeylanica, S. grosus and C. difformis were regarded as least tolerant weed species. 相似文献
95.
Latif MT Baharudin NH Velayutham P Awang N Hamdan H Mohamad R Mokhtar MB 《Environmental monitoring and assessment》2011,181(1-4):479-489
The renovation of a building will certainly affect the quality of air in the vicinity of where associated activities were undertaken, this includes the quality of air inside the building. Indoor air pollutants such as particulate matter, heavy metals, and fine fibers are likely to be emitted during renovation work. This study was conducted to determine the concentration of heavy metals, asbestos and suspended particulates in the Biology Building, at the Universiti Kebangsaan, Malaysia (UKM). Renovation activities were carried out widely in the laboratories which were located in this building. A low-volume sampler was used to collect suspended particulate matter of a diameter size less than 10 μm (PM??) and an air sampling pump, fitted with a cellulose ester membrane filter, were used for asbestos sampling. Dust was collected using a small brush and scope. The concentration of heavy metals was determined through the use of inductively coupled plasma-mass spectroscopy and the fibers were counted through a phase contrast microscope. The concentrations of PM?? recorded in the building during renovation action (ranging from 166 to 542 μg m?3) were higher than the value set by the Department of Safety and Health for respirable dust (150 μg m?3). Additionally, they were higher than the value of PM?? recorded in indoor environments from other studies. The composition of heavy metals in PM?? and indoor dust were found to be dominated by Zn and results also showed that the concentration of heavy metals in indoor dust and PM?? in this study was higher than levels recorded in other similar studies. The asbestos concentration was 0.0038 ± 0.0011 fibers/cc. This was lower than the value set by the Malaysian Department of Occupational, Safety and Health (DOSH) regulations of 0.1 fibers/cc, but higher than the background value usually recorded in indoor environments. This study strongly suggests that renovation issues need to be considered seriously by relevant stakeholders within the university in order to ensure that the associated risks toward humans and indoor environment are eliminated, or where this is not feasible, minimized as far as possible. 相似文献
96.
Spatial water quality assessment of Langat River Basin (Malaysia) using environmetric techniques 总被引:6,自引:0,他引:6
Hafizan Juahir Sharifuddin M. Zain Mohd Kamil Yusoff T. I. Tengku Hanidza A. S. Mohd Armi Mohd Ekhwan Toriman Mazlin Mokhtar 《Environmental monitoring and assessment》2011,173(1-4):625-641
This study investigates the spatial water quality pattern of seven stations located along the main Langat River. Environmetric methods, namely, the hierarchical agglomerative cluster analysis (HACA), the discriminant analysis (DA), the principal component analysis (PCA), and the factor analysis (FA), were used to study the spatial variations of the most significant water quality variables and to determine the origin of pollution sources. Twenty-three water quality parameters were initially selected and analyzed. Three spatial clusters were formed based on HACA. These clusters are designated as downstream of Langat river, middle stream of Langat river, and upstream of Langat River regions. Forward and backward stepwise DA managed to discriminate six and seven water quality variables, respectively, from the original 23 variables. PCA and FA (varimax functionality) were used to investigate the origin of each water quality variable due to land use activities based on the three clustered regions. Seven principal components (PCs) were obtained with 81% total variation for the high-pollution source (HPS) region, while six PCs with 71% and 79% total variances were obtained for the moderate-pollution source (MPS) and low-pollution source (LPS) regions, respectively. The pollution sources for the HPS and MPS are of anthropogenic sources (industrial, municipal waste, and agricultural runoff). For the LPS region, the domestic and agricultural runoffs are the main sources of pollution. From this study, we can conclude that the application of environmetric methods can reveal meaningful information on the spatial variability of a large and complex river water quality data. 相似文献
97.
Eshraq Ahmed Abdullah Abdul Halim Abdullah Zulkarnain Zainal Mohd Zobir Hussein Tan Kar Ban 《环境科学学报(英文版)》2012,24(10):1876-1884
A modified hydrophilic penta-bismuth hepta-oxide nitrate (Bi5O7NO3) surface was synthesized via a precipitation method using TiO2 and Ag as modified agents. The synthesized product was characterized by different analytical techniques. The removal efficiency was evaluated using mono-and di-sulphonated azo dyes as model pollutants. Different kinetic, isotherm and diffusion models were chosen to describe the adsorption process. X-ray photoelectron spectroscopy (XPS) results revealed no noticeable differences in the chemical states of modified adsorbent when compared to pure Bi5O7NO3;however, the presence of hydrophilic centres such as TiO2 and Ag developed positively charged surface groups and improved its adsorption performance to a wide range of azo dyes. Dyes removal was found to be a function of adsorbent dosage, initial dye concentration, solution pH and temperature. The reduction of Langmuir 1,2-mixed order kinetics to the second or first-order kinetics could be successfully used to describe the adsorption of dyes onto the modified adsorbent. Mass transfer can be described by intra-particle diffusion at a certain stage, but it was not the rate limiting step that controlled the adsorption process. Homogenous behavior of adsorbent surface can be explored by applying Langmuir isotherm to fit the adsorption data. 相似文献
98.
Xiao-jun Wang Jian-yun Zhang Shamsuddin Shahid Amgad ElMahdi Rui-min He Xin-gong Wang Mahtab Ali 《Mitigation and Adaptation Strategies for Global Change》2012,17(1):65-75
Yellow River, is designated as “the cradle of Chinese civilization” and played a key role not only in the country’s economic
development but also in the historic and cultural identity of the Chinese people. With the rapid economic development and
population growth, water demand for industry and households has increased significantly in the Yellow River basin; this has
caused an increasing gap between water supply and demand. Competing water demands triggered conflicts between disparate water
users on different scales such as the rich and the poor, or between different sectors and regions, such as domestic and agriculture,
agriculture and industry, upstream and downstream, rural and urban areas, etc. Ensuring equity in water supply for conflicting
water users is one of the major challenges that facing water managers and in particular water management in the Yellow River
basin. In this paper, a method has been developed to calculate the Gini coefficient of water use as an indicator to measure
the equality in domestic water supply. A dual domestic water use structure model is employed for this purpose. The developed
method is subsequently applied to assess the equality in domestic water supply in the Yellow River. Data of population growth,
domestic water use and economic development over the time period 1999-2006 are used to calculate the Gini coefficient of water
use over the same length of period. The result shows a decreasing trend in Gini coefficient of domestic water use in the Yellow
River basin after 2001 which means domestic water use is becoming more and more equitable in the basin. The study justifies
that the Gini coefficient of water use can be used and recommended as a useful tool for the water management especially in
the context of global change. 相似文献
99.
Babalghaith Ali Mohammed Koting Suhana Sulong Nor Hafizah Ramli Khan Md Zahid Hossain Milad Abdalrhman Yusoff Nur Izzi Md. Ibrahim Mohd Rasdan Mohamed Abdul Halim bin Nagor 《Environmental science and pollution research international》2022,29(24):35557-35582
Environmental Science and Pollution Research - The daily utilization of a large amount of raw materials is causing a rapid depletion of natural resources. The growth of the human population is... 相似文献
100.
Pang Swee Yun Suratman Suhaimi Latif Mohd Talib Khan Md Firoz Simoneit Bernd R. T. Mohd Tahir Norhayati 《Environmental science and pollution research international》2022,29(11):15849-15862
Environmental Science and Pollution Research - Surface sediments along the Southern Terengganu coast (≤7 km from the coast) were analyzed for polycyclic aromatic hydrocarbons (PAHs). The... 相似文献