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排序方式: 共有170条查询结果,搜索用时 15 毫秒
91.
Hyunhee Kim Yong-Chul Jang Yeonjung Hwang Youngjae Ko Hyunmyeong Yun 《Frontiers of Environmental Science & Engineering》2018,12(3):3
92.
A critical analysis of earthquakes and urban planning in Turkey 总被引:2,自引:0,他引:2
The land use plans and policies of developed countries that live with the threat of earthquakes are gaining importance in reducing or eliminating the long‐term threat to people and property. In developing countries, however, these plans and policies seem to increase the level of vulnerability. This paper examines the effects of the earthquakes that have occurred in Turkey since 1992, with a particular focus on urbanisation and planning policies. It is based on extensive surveys carried out on location immediately after the earthquakes in Erzincan and Kocaeli‐Gölcük in 1992 and 1999, respectively. The analysis takes into account several factors, including the height of buildings, geological conditions and the construction period. The authors conclude that land use planning can serve as a very useful instrument for mitigating the extent of disaster damage if it is part of an appropriate planning system. In the case of Turkey, the planning system needs to be reorganised for this purpose. 相似文献
93.
Six 5 wt.% metal sorbents including Mn, Fe, Cu, Co, Ce and Zn supported on gamma-Al2O3, prepared by the incipient wetness impregnation method with calcination at 700 degrees C for 2 h, have been investigated for sorption of hydrogen sulfide in the temperature range of 500-700 degrees C. The sorption experiments were conducted in a fixed-bed reactor in terms of breakthrough curves and characterized by X-ray powder diffraction. The results reveal that the copper and manganese sorbents exhibit the best performance because they provide nearly 100% utilization, but the copper sorbent has a lower sulfur sorption capacity compared with the manganese sorbent. The zinc and cerium sorbents are not good candidates attributed to the vaporization of zinc and unexpected product for cerium. Effects of support materials on 5 wt.% manganese were also investigated by using gamma-Al2O3, SiO2 and TiO2 in this study. Five weight percent Mn/gamma-Al2O3 shows the best performance among support candidates. On the basis of XRPD and BET surface area analysis, TiO2 appears a huge loss in BET surface area associated with a significant formation of rutile form. 相似文献
94.
Sang-Ho Lee Kyoung-Woong Kim Ilwon Ko Sang-Gyu Lee Hak-Soo Hwang 《Environmental geochemistry and health》2002,24(4):277-291
The saline water intruded zone in paddy fields near the seashore can be diagnosed accurately by joint exploration with geophysical and geochemical methods. Using the electromagnetic (EM) sounding technique, the weakly consolidated zone which introduces saline water into such an area of near seashore paddy fields in Korea was detected from the variation of electrical conductivity distribution following field irrigation. Vertical electrical sounding (VES) with Schlumberger array and chemical analysis of top soils, and groundwater in the study area verified the intruded zone near the surface. The VES results showed that the intrusion of seawater occurred in the form of a channel down to 30 m below sea level. Geochemical analysis of the top soil samples for the six major elements found in seawater indicated that the region showing high concentrations is concordant with the weakly consolidated zone near the surface. The degree of contamination in the study area was investigated by comparing the soil data with those from a nearby old reclamation field. If remediation work is not done for this intrusion zone, the sodicity degree in the paddy soil is expected to increase compared with the reference site data. 相似文献
95.
Dong Hwan Ko 《International journal of occupational safety and ergonomics》2019,25(4):568-574
This study aims to describe the characteristics of occupational injuries to educational support staff (service worker) in schools. In this research, 803 injured workers registered in 2015 were analyzed in terms of their gender, age, work experience, school type, work type, accident type, agency of accident, nature of injury and injured part of the body for each occupation. The workers were classified into after-school instructor, custodian and cooking staff. Accidents occurred mainly due to slips (35.6%) on floor/stair or contact with high temperature (18.1%). Also, the workers mostly fractured (41.2%) or had burns (19.3%) on their leg/foot (37.1%) or arm/hand/finger (29.8%). The results showed the difference in characteristics and injury pattern of injured persons for each occupation type, addressing the need for customized preventative measures for each situation. The results of this study can be a baseline in devising policies and guidelines for preventing accidents of service workers in schools. 相似文献
96.
Andrzej Ko
aczkowski Andrzej P
kalski Zygmunt Meissner 《Journal of Loss Prevention in the Process Industries》2000,13(6):431-561
The statistical analysis of the results of testing liability to detonation of coated and uncoated prilled ammonium nitrate was performed. The correlation between the crushing of the lead cylinders as a result of the so-called 4″ tube test and the chemical as well as the physical properties of ammonium nitrate were determined. The results demonstrated that the liability to detonation of ammonium nitrate may be estimated by use of mathematical equations, which employ easily obtainable experimental values relating to the chemical composition and physical properties of the tested fertilisers. 相似文献
97.
Sackey Lyndon N.A. Mocová Klára A. Petrová Šárka Kočí Vladimír 《Environmental science and pollution research international》2021,28(47):67150-67158
Environmental Science and Pollution Research - Wood is one of the extensively used goods on the earth due to its large accessibility and usage in a wide range of human life. When woods are exposed... 相似文献
98.
Białk-Bielińska A Maszkowska J Mrozik W Bielawska A Kołodziejska M Palavinskas R Stepnowski P Kumirska J 《Chemosphere》2012,86(10):1059-1065
Sulfonamides (SAs) are one of the oldest groups of veterinary chemotherapeutic agents. As these compounds are not completely metabolized in animals, a high proportion of the native form is excreted in feces and urine. They are therefore released either directly to the environment in aquacultures and by grazing animals, or indirectly during the application of manure or slurry. Once released into the environment, SAs become distributed among various environmental compartments and may be transported to surface or ground waters. The physicochemical properties of SAs, dosage and nature of the matrix are the factors mainly responsible for their distribution in the natural environment. Although these rather polar compounds have been in use for over half a century, knowledge of their fate and behavior in soil ecosystems is still limited. Therefore, in this work we have determined the sorption potential of sulfadimethoxine and sulfaguanidine on various natural soils. The influence on sorption of external factors, such as ionic strength and pH, were also determined. The sorption coefficients (Kd) obtained for the sulfonamides investigated were quite low (from 0.20 to 381.17 mL g−1 for sulfadimethoxine and from 0.39 to 35.09 mL g−1 for sulfaguanidine), which indicated that these substances are highly mobile and have the potential to run off into surface waters and/or infiltrate ground water. Moreover, the sorption of these pharmaceuticals was found to be influenced by OC, soil solution pH and ionic strength, with higher Kd values for soils of higher OC and lower Kd values with increasing pH and ionic strength. 相似文献
99.
Hsin Ta Hsueh Tzu Hsing Ko Wen Chieh Chou Wen Chi Hung Hsin Chu 《Environmental Chemistry Letters》2012,10(1):79-87
We report for the first time the distribution and hazard potential of aerosol and metals resulting from joss paper burning.
Burning joss paper and incense is a traditional custom in many Oriental countries. Large amounts of air pollutants, including
particles, polycyclic aromatic hydrocarbons, toxic metals and other gaseous pollutants, are released into the environment
during the burning stage. Many investigations have reported on the emission of pollutants from the incense burning. However,
no work has been reported until now on the analysis of the released pollutants apart from polycyclic aromatic hydrocarbons.
In this study, a micro-orifice uniform-deposit impactor and inductively coupled plasma optical emission spectrometry were,
respectively, used to collect aerosols and characterize the toxic metals from joss paper burning. We studied two types of
particulate matter (PM): PM2.5 that are particles with a diameter smaller than 2.5 μm and PM10 that are particles with a diameter smaller than 10 μm. PM2.5 are the most potentially toxic particles. Our results showed that PM2.5 are the major component of the pollutants and that the PM2.5 to PM10 ratio ranged from 62 to 99%. The metals Na, Ca, Mg, Al and K were the main species in the aerosol and in the bottom ash. 相似文献
100.
Ivan Kuneš Martin Baláš Tereza Koňasová Ondřej Špulák Vratislav Balcar Kateřina Bednářová Millerová Dušan Kacálek Michal Jakl Daniel Zahradník Jan Vítámvás Jaroslava Št́astná Jana Jaklová Dytrtová 《Environmental management》2014,54(6):1421-1433
The article summarizes outcomes of a biomass study conducted in a young speckled alder plantation on a cold mountain site. At this location, the previously existing old forest was clear felled because of damage from air pollution, and present-day surface humus is in need of restoration. The intention of this study was to quantify the biomass and nutrients accumulated by alders and their components and assess whether the initial fertilization resulted in increased biomass production and nutrient accumulation in the biomass. Besides the control, two fertilized treatments were installed. In the surface treatment (SUT), the amendment was applied as a base dressing in small circles around trees. In the planting-hole treatment (PHT), the amendment was incorporated into soil inside the planting holes. Five growth seasons after planting and fertilization, six alders from each treatment were harvested including roots. Their biomass was quantified and analyzed for macroelements. The greatest pool of dry mass (DM) was branches in the control and stem wood in the fertilized treatments. The greatest pools of macroelements were leaves and branches. The most pronounced effects of fertilization were recorded in the DM and consequently in the absolute quantities of nutrients. The DM of an average tree in the control, SUT, and PHT was 85, 226, and 231 g, respectively. The absolute contents of nutrients per tree in the fertilized treatments showed the following increases, as compared with the control: (N) 2.5–2.6 times; (P) 1.6–2.4 times; (K) 1.8–2.1 times; and (Mg) 1.8–2.0 times, respectively. Speckled alder responded positively to fertilization. 相似文献