• Proceedings of the Korean Radioactive Waste Society Conference
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• 2003.11a
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• pp.544-548
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• 2003

The Irradiation test of bar code label tagged on radioactive waste container was done to determine the effect of radiation. Low and medium radioactive waste is that below total activity of 4,000 Bq/g according to the Korean nuclear law. The irradiation amount to radiate bar code label tagged on radioactive waste container was calculated by MCNP-4b computer code. The nuclide such as Co-60 and Cs-137 was assumed to contribute 50% of total activity. Real irradiation amount for bar code label was finally calculated by the dimensions of the container and the bar code label. The Identification of post and the physical deflection of irradiated bar code label was tested by the bar code reader. The coated bar code label was suitable to use on low and medium radioactive waste container.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.774-780
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• 2007

Occurrence amount of construction waste dominates weight that is the most as 44.6% if examine domestic waste occurrence present condition, scales of construction becomes jumbo gradually depending on social environment that change and occurrence amount of construction waste is steadily increasing real condition. Construction waste processing and recycling expense have held about 0.5% to 1% of whole construction cost, but if do not manage construction waste efficiently in each construction site, ratio that construction waste processing and recycling expense hold in whole construction cost is expected that will rise more. This does hint that environmental harm and economical damage are serious by construction waste. In this study, system is activated in each construction site at information interchange system and waste electron succession and waste government official makes radio frequency realization technology (RFID) purpose suggest plan that can be applied efficiently through example analysis that a RFID technology is already applied by efficiently attained plan.

• Journal of Korea Society of Waste Management
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• v.35 no.7
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• pp.627-639
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• 2018

Waste management in Jeju Province, Korea, has recently emerged as an urgent problem. The increasing waste discharge requires more landfills but, since it is an island, the available land is restricted. Accordingly, an efficient waste management urgently requires environmentally sustainable policies. In this article, the waste discharge characteristics (such as the amount of waste, its composition, etc.) of Jeju Province have been compared with those in the rest of Korea. The current industrial waste management of two cities on the Island, Jeju City and Seogwipo City, has been also analyzed to suggest policies for an efficient management. The local government's endeavor to enhance environmental awareness of the community has been known to reduce the private cost of policy compliance, and have individuals recognize the results of their policy compliance. Policies to achieve the above are then proposed.

• Journal of the Korean Home Economics Association
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• v.38 no.9
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• pp.107-118
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• 2000

This study was carried out to obtain the information concerning the behavior and underlying consciousness of housewives about the disposal of foods waste and to find out relationships among environmental variables. Data were obtained through questionnaires and interviews from 350 housewives in Ulsan area. Foods waste can be produced at every stage of cooking. It was found that the most amount of foods waste was produced at the preparation stage of cooking. The type of dishes which produces the most waste was chigas. About 49.4% of foods waste consisted of vegetables and fruits and 18.5% of that was fishes. The environmental concern related to foods waste disposal was relatively high among subjects and they were willing to accept foods waste reducing system if it is not too complicated to use and not too expensive. These results have demonstrated that menu planning before food preparation and buying cleaned and trimmed materials in the market should be highly recommended to reduce the foods waste. To improve the disposal behavior of foods waste, it is required that well programmed education for environmental conservation and the public facility for foods waste disposal.

• Journal of the Korean Ceramic Society
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• v.26 no.4
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• pp.521-531
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• 1989

The dependence of the chemical durability of simulated waste glasses containing the simplified waste similar to the SRP waste on compositions of host glasses, amounts of waste loading, and kinds of leachants has been investigated as a basic study on the waste immobilization through vitrification. The maximum limit of the amount of waste loading for glassforming with the host sodium borosilicate glasses selected in this study was 50wt%. The chemical durability of waste glasses whose host glass belonged to the immiscible composition region was much higher than that of waste glasses whose host glass belonged to the miscible composition region. The former waste glass showed lower chemical durability in deionized and silicate waters than in brine, while the latter glass showed the lowest chemical durability in deionized and silicate waters than in brine, while the latter glass showed the lowest chemical durability in silicate water. It was also observed that the total leaching rates in brine were noticeably small in comparison with those in other solutions. The composition of the host borosilicate glass which was suitable for the treatment of the waste through vitrification was found to be 25 Na2O-5B2O3-70SiO2(wt.%).

• Resources Recycling
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• v.15 no.3 s.71
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• pp.58-65
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• 2006

The applicability of the waste pulp which produced in the paper recycling process as an adsorbent for the treatment of $Ni^{2+}$ ion in wastewater has been investigated taking the initial concentration of adsorbate, temperature, the amount of adsorbent, and solution pH as the experimental variables. In addition, the effect of the concentration of coexisting solute and pre-treatment of adsorbent on the adsorbability of $Ni^{2+}$ ion were also examined. The electrokinetic potential of waste pulp was observed to be positive below pH 7.8 and negative above this pH. The adsorption reaction of $Ni^{2+}$ ion reached its equilibrium within 4 hours after the reaction was initiated and the adsorbed amount of adsorbate was found to increase with its initial concentration. The adsorbability of $Ni^{2+}$ was raised with temperature so that its adsorption reaction was considered to be exothermic, which was substantiated by thermodynamic calculation. Also, the adsorbed amount of $Ni^{2+}$ was raised with the amount of waste pulp and with pH in the range of pH $3{\sim}6$. This behavior of the adsorption of $Ni^{2+}$ according to the solution pH was well agreed with the electrokinetic characteristics of waste pulp in solution. The amount of coexisting solute was observed to reversely affect on the $Ni^{2+}$ adsorption onto waste pulp under the experimental conditions. With regard to the pre-treatment of adsorbent with NaOH, the adsorbability of $Ni^{2+}$ was increased with the concentration of NaOH to a certain extent. However, it was found to decrease contrarily when the concentration of NaOH became too high.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2019.05a
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• pp.283-284
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• 2019

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.129-130
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• 2018

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.9
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• pp.243-271
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• 1998

The changes of life-style by improving the standard of living produce the development of food service industry. But, the consequence is that food waste also increase. I think that the problems about the food waste become more critical. There are some reports about counting the amount of remaining foods until now. But, I can not find reports about the calory analysis of the remaining foods. So, I analysis the amounts and calories of the food and remaining food served at the restaurants for the purpose of groping how to reduce the remaining food and conclude as follows. First, the average amount of the food giving to one person is 1007gm(from 300gm to 1367gm), and the average amount of the remaining food is 126gm(from 29gm to 172gm). Second, the average calory of the food giving to one person is 795.5kcal(from 464kcal to 1225kcal), and the average calory of the remaining food is 140.8kcal(from 29kcal to 289kcal). So, we gain 130kcal more than recommending calory to woman. Therefore, we need to studies of developing menu, controlling the amount of supplied food, and improving how to supply. Also we need to study about the using of food bank and publish and use about recycling of food waste.

• Environmental Engineering Research
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• v.11 no.1
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• pp.14-27
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• 2006

The proper management of discarded electronic devices (often called electronic-waste) is an emerging issue for solid waste professionals throughout the world because of the large growth of the waste stream, and the content of toxic metals in them, most notably heavy metals such as lead. Notebook computers are becoming one of the major components of discarded computer devices and will continue to increase in the waste stream in the future. While the computers hold great promise for recycling, a substantial amount of this waste is often disposed in municipal solid waste (MSW) landfills. The toxicity characteristic leaching procedure (TCLP) is commonly used to simulate worse case leaching conditions where a potentially hazardous waste is assumed to be disposed along with municipal solid waste in a landfill with actively decomposing materials overlying an aquifer. The objective of this study was to examine leaching potential of lead from discarded notebook computers using the scale-up TCLP, other standard leaching tests such as California waste extraction test (Cal WET), and the synthetic precipitation leaching procedure (SPLP) and actual landfill leachates as leaching solution. The scale-up TCLP is a modified TCLP (where the device was disassembled and leached in or near entirety) to meet the intent of the TCLP. The results showed that the scale-up TCLP resulted in relatively high lead found in the leachate with an average of 23.3 mg/L. The average level was less than those by the standard TCLP and WET (37.0 mg/L and 86.0 mg/L, respectively), but much greater than those by the SPLP and the extractions with the landfill leachates (0.55 mg/L and 1.47 mg/L, respectively). The pH of the leaching solution and the ability of the organic acids in the TCLP and WET to complex with the lead were identified as major factors that controlled the amount of lead leached from notebook computers. Based on the results obtained by a number of leaching tests in this study, notebook computers may present a potential leaching risk to the environment and human health upon land disposal. However, further investigation is still needed to assess the true risk posed by the land disposal of discarded notebook computers.