توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Study on the Transport of Sediment Oxygen Demand –Related OrganicMatter in Bottom Sediment System
نویسنده(ها): ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، پنجم،شماره۳، Summer ۲۰۱۱، سال
تعداد صفحات: ۸
Approach of organic material anaerobic biodegradation and species of organic matter in sediment are discussed, and then a classifying method of the species is proposed on a new viewpoint. The pore water sediment oxygen demand (SOD) numerical model in bottom sediment system is proposed originally, which differs from other advection–dispersion–sorption (ADS) model in adding a SOD–creating term. The model was preliminarily validated via pilot experiment. Finally, this model was used to simulate SOD concentration of pore water in bottom sediment, and the sensitivity of parameters in the model was analyzed. The results indicate that SOD–creating factor at beginning stage and pore water SOD–attenuating factor in bottom sediment are the most important coefficients in the new model and should be estimated accurately. Because of the assumption of equilibrium of sorption\desorption, the new model appears to be valid only with less than 5 m\ d vertical velocity of pore water.

۲Total Dust and Asbestos Concentrations during Asbestos–Containing Materials Abatement in Korea
نویسنده(ها): ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۴، Autumn۲۰۱۲، سال
تعداد صفحات: ۴
This study was performed during the abatement of two asbestos–containing materials (ACM): baumlite board (cement flat board) and ceiling textile. The concentrations of total dust for personal sampling were 0.28 and 1.70 mg\m3 during baumlite board and ceiling textile abatements, respectively, when calculated with 8–hr time–weighted average (TWA). The geometric mean (GM) asbestos concentrations were 0.005±1.9 and 0.007±1.6 f\cc for personal sampling and 0.004±1.1 and 0.008±1.6 f\cc for area sampling with 8–hr TWA, respectively. Asbestos exposure concentrations were not significantly different during abatement of the two materials (p>0.05). Further, no statistical difference existed between personal and area samples during the two abatements (p>0.05). The concentrations of personal and area samples during both abatements were below the occupational exposure limit (OEL: 0.1 f\cc) of the Korean Ministry of Employment and Labor (MOEL). The correlation between total dust and asbestos concentrations was low throughout both abatements.

۳Total Dust and Asbestos Concentrations during Asbestos–Containing Materials Abatement in Korea
نویسنده(ها): ، ، ، ، ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، ششم،شماره۴، Autumn۲۰۱۲، سال
تعداد صفحات: ۴
This study was performed during the abatement of two asbestos–containing materials (ACM): baumlite board (cement flat board) and ceiling textile. The concentrations of total dust for personal sampling were 0.28 and 1.70 mg\m3 during baumlite board and ceiling textile abatements, respectively, when calculated with 8–hr time–weighted average (TWA). The geometric mean (GM) asbestos concentrations were 0.005±1.9 and 0.007±1.6 f\cc for personal sampling and 0.004±1.1 and 0.008±1.6 f\cc for area sampling with 8–hr TWA, respectively. Asbestos exposure concentrations were not significantly different during abatement of the two materials (p>0.05). Further, no statistical difference existed between personal and area samples during the two abatements (p>0.05). The concentrations of personal and area samples during both abatements were below the occupational exposure limit (OEL: 0.1 f\cc) of the Korean Ministry of Employment and Labor (MOEL). The correlation between total dust and asbestos concentrations was low throughout both abatements.

۴Ameliorating Topsoil Conditions by Biosolid Application for a waste Landfill landscape
نویسنده(ها): ، ، ، ، ،
اطلاعات انتشار: International Journal Of Environmental Research، هفتم،شماره۱، Winter ۲۰۱۳، سال
تعداد صفحات: ۱۰
Sanitary landfills, created for the disposal of solid waste, usually are developed into parks afterthey are closed. However, soil amelioration with organic matter is usually needed to restore fertility andpromote revegetation. Sewage sludge creates a massive waste disposal problem. The use of composted sewage sludge (biosolid) as a soil conditioner might restore the soil fertility at landfill sites and simultaneouslyalleviate the need for sewage sludge disposal. We applied biosolid to waste landfill soil and evaluated its effects on soil properties and tree growth in a field experiment. Biosolid improved soil characteristics including moisture, organic matter, and nitrogen content and also increased tree height and diameter at breast height.Physiological measures, such as chlorophyll content and photosynthetic rate, showed positive responses intrees grown in biosolid treatments. Heavy metal concentrations in soil and tree leaves after applying compost did not differ from concentrations measured at control sites. Therefore, we conclude that the use of biosolid in waste landfills would be an efficient, environmentally beneficial, and cost–effective method to restore the conditions of landfill soil for plants.
نمایش نتایج ۱ تا ۴ از میان ۴ نتیجه