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한국폐기물자원순환학회(구 한국폐기물학회)> 한국폐기물자원순환학회지> 생물에 의한 미세플라스틱의 섭취(ingestion), 체내 이동(translocation), 배설(egestion)에 관한 고찰 -생물은 미세플라스틱을 섭취 후 배설하는가?-

KCI등재

생물에 의한 미세플라스틱의 섭취(ingestion), 체내 이동(translocation), 배설(egestion)에 관한 고찰 -생물은 미세플라스틱을 섭취 후 배설하는가?-

Review of Ingestion, Translocation and Egestion of Microplastics by Bio-organism -Does the Bio-organism Egest the Microplastics Ingested?-

김용진 ( Yong-jin Kim ) , 정승미 ( Seung-mi Jeong ) , 이혜성 ( Hye-sung Lee )
  • : 한국폐기물자원순환학회
  • : 한국폐기물자원순환학회지 37권4호
  • : 연속간행물
  • : 2020년 06월
  • : 219-234(16pages)
한국폐기물자원순환학회지

DOI

10.9786/kswm.2020.37.4.219


목차

I. 서 론
II. 거대분자의 세포 내 흡수 기작
III. 생물의 미세플라스틱 섭취, 체내 이동 및 배설
IV. 고 찰
VI. 요약 및 제언
사 사
References

키워드 보기


초록 보기

In this review, data on the ingestion, translocation and egestion of microplastics by different organisms are analysed and summarized to predict the behaviour of microplastics in human body. Microplastics translocation from the gastrointestinal tract to the circulatory system or tissue are associated with the species and groups of organisms and the size of microplastics. Ingested microplastics are translocated to thoracic lymph nodes via macrophages and to the liver, kidney, spleen, heart, brain and secondary target organs via systemic circulation. In the ingestion, translocation, and egestion of microplastics by mammals, particles of >150 μm are rarely translocated or absorbed by organs (except the gut), characterized by a localization effect on the immune system or gut infection. Although microplastics <150 μm are linked to systemic exposure, their absorption remains limited with intense absorption restricted to particles <1.5μ m. Existing studies have focused on laboratory experiments to investigate microplastic concentrations in food, the type of plastics, and morphology (e.g., free or aggregate state, particle size, and shape). To further understand the behaviours of microplastics, systematic and comprehensive studies should be continued.

UCI(KEPA)

I410-ECN-0102-2021-500-000788531

간행물정보

  • : 공학분야  > 환경공학
  • : KCI등재
  • :
  • : 격월
  • : 2093-2332
  • : 2287-5638
  • : 학술지
  • : 연속간행물
  • : 1984-2022
  • : 2983


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39권6호(2022년 12월) 수록논문
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KCI등재

1폐기물매립지의 메탄 배출량 측정 정확도 향상을 위한 시·공간적 배출 특성 고찰

저자 : 송상훈 ( Sang-hoon Song ) , 김란희 ( Ran-hui Kim ) , 이남훈 ( Nam-hoon Lee ) , 박진규 ( Jin-kyu Park )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 477-488 (12 pages)

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First-order decay models have been used to estimate annual landfill methane emissions for national greenhouse gas inventories. These models vary greatly. Inaccurate input values or oversimplified processes, such as methane oxidation or dynamic methane emission rates, cause this downside. Direct field measurements can be used to predict total methane emissions more accurately. Methane emission rates fluctuate weekly and daily and are influenced by the soil cover and meteorological conditions such as barometric pressure, temperature, rain, and wind speed. Hotspot emissions contribute significantly to landfill methane emissions. To accurately estimate annual methane emissions, direct field measurements must account for meteorological effects and quantify hotspot emissions during landfill emission monitoring programs. In South Korea, there are no field-based calculations, hampering the development of a strategic strategy to reduce methane emissions from solid waste landfills. South Korea must develop innovative methods to quantify landfill methane emissions and a mitigation strategy.

KCI등재

2수출·입 폐기물의 관리 개선 마련 연구: 관세·통계통합품목분류표(HSK)를 중심으로

저자 : 박윤수 ( Yoon Soo Park ) , 전태완 ( Tae-wan Jeon ) , 신선경 ( Sun-kyoung Shin ) , 엄남일 ( Nam-il Um )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 489-497 (9 pages)

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The export and import waste generated in Korea amounts to 2.63 million tons per year (about 4% of total industrial waste). During importing and exporting waste, an item code called the Harmonized System of Korea (HSK) is assigned to it through classification, inspection, and customs clearance procedures. This study prepared methods for identifying the current status of HSK, systematizing HSK, and effectively applying HSK. First, the following were investigated: the status of the HSK Code, the current status of HSK management in Korea, and HSK related to waste. As a result, Korea adopted the HSK classification table and operated with it as a notice by the Ministry of Economy and Finance. A system of 10 units is used, and there are about 339 HSK related to waste. Second, it was found that there were wastes without HSK or that some items did not match. 119 new HSK were proposed for 17 types of imported and exported waste. Third, it was found that, at times, responsible personnel made the wrong decision or intentionally entered incorrect HSK in the process of importing and exporting waste. Designated and ordinary industrial wastes under the “Waste Control Act” of Korea need to be linked with the HSK.

KCI등재

3우리나라 폐기물매립지 온실가스 감축방안 : 매립가스 유효활용의 발전 및 과제

저자 : 박진규 ( Jin-kyu Park ) , 송상훈 ( Sang-hoon Song ) , 김란희 ( Ran-hui Kim ) , 전연호 ( Yeon-ho Jeon ) , 이남훈 ( Nam-hoon Lee )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 498-509 (12 pages)

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South Korea's most recent national inventory report found that landfills are the largest anthropogenic source of methane. Despite decades of closure, landfill methane emissions threaten human health and climate change. This study investigates landfill gas (LFG) valorization to reduce these emissions. This technique converts LFG into value-added chemicals like biomethane, syngas (a mixture of carbon monoxide and hydrogen), methanol, and dimethyl ether. LFG valorization is an interesting approach to mitigate greenhouse gas emissions and shift toward a low-carbon society, but it is not economically feasible. To reduce carbon emissions and boost LFG valorization in South Korea, a carbon tax and/or subsidies may be considered. Establishing a sustainable LFG valorization technology would provide enough momentum to create a circular carbon-based economy.

KCI등재

4전과정평가 기법을 활용한 커피박 자원화의 환경부하 저감효과 분석 : 일반합성목재와 커피박합성목재의 환경영향 비교를 중심으로

저자 : 이종효 ( Jong Hyo Lee ) , 황용우 ( Yong Woo Hwang ) , 황윤수 ( Youn Soo Hwang )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 510-520 (11 pages)

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In this study, we compare the environmental loads of the coffee waste wooden deck and the general wooden deck using the life cycle assessment (LCA). We estimate the coffee waste wooden deck's environmental advantages by LCA methodology. According to our findings, a coffee waste wooden deck reduces environmental load by 13.2% when compared to a general wooden deck. The reduction ratio for eutrophication potential was 20.4%, acidification potential was 19.4%, and global warming potential was 15.9%. Among the six environmental impact categories, abiotic depletion had the least reduction. In particular, while CO2 emission reduction may seem insignificant numerically from the functional unit's perspective, it can be considered a significant reduction effect given the characteristics of building materials. Assuming the trail construction, which has 3.6 m of width and 360 m of length (1,320 m2), the reduction effect of the environmental load is approximately 11.6 ton CO2-eq. Moreover, it reduces environmental load by 11.6 tons of CO2 equivalent per year and absorbs as much GHGs as 4,936 pine trees or 3,277 oak trees. This study helps management and policymakers visualize the impact of recycling coffee waste on the environment.

KCI등재

5바이오촤를 포함한 모르타르의 휨강도 특성

저자 : 엄희숙 ( Hee Suk Eom ) , 전병준 ( Byung Jun Jeon ) , 신동훈 ( Donghoon Shin )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 521-531 (11 pages)

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Biochar is a charcoal-like material that separates and stores the carbon component of organic biomass that is grown by absorbing the greenhouse gas emissions produced from burning fuel. Interestingly, when biochar is used as an additive during mortar production, the effect of the stored greenhouse gas is evident in the characteristics of the building. In this study, we experimentally evaluate the bending strength of mortar when biochar partially replaces the content of sand in mortar production. Under the condition that the ratio of cement to sand is 1: 3, in the range of 0% to 9.3% based on the mass of cement, we produce specimens in which some sand had been replaced with biochar in 4 cm × 16 cm × 1 cm. Following this, the bending strength of these specimens is measured using a three-point bending strength-measuring device at 7 days and 28 days respectively. Our findings reveal that at up to 7% of biochar replacement rate, it is possible to produce a greenhouse gas-stored mortar without loss of mortar strength; more so, we observed that the 5% biochar replacement rate demonstrates the highest bending strength showing that the advantage of strength improvement can also be utilized.

KCI등재

6파일럿 스케일 버너에서 바이오 중유 및 바이오 원유 혼합연료의 연소 특성

저자 : 정연우 ( Yeonwoo Jeong ) , 류영현 ( Younghyun Ryu ) , 최상규 ( Sangkyu Choi ) , 최연석 ( Yeonseok Choi ) , 한소영 ( Soyoung Han ) , 응웬반꾸잉 ( Quynhvan Nguyen )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 532-542 (11 pages)

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Carbon neutrality is a balance between emitting carbon and absorbing carbon from the soil, forest, and oceans. To achieve carbon neutrality by 2050, a variety of research on energy such as solar, wind, hydrogen, biomass, and waste energy has been performed worldwide. Bio-fuel oil and bio-crude oil are considered promising energy resources to achieve carbon neutrality because they can be effectively used not only for heat energy but also for transport fuel. In this study, an experiment on the combustion characteristics of bio-fuel oil and bio-crude oil blends was conducted. The mixtures of biofuel and conventional diesel fuel were also studied. A conventional oil burner with a 35 kW capacity was modified into a downward injection type and to adopt an air-blast atomizing nozzle. Bio-fuel oil was made from waste oil and bio-crude oil was derived from coffee grounds. The temperature distributions in the combustion chamber and the gaseous emissions were compared at various blending ratios. When the bio-fuel oil was blended with bio-crude oil from the coffee ground, nearly complete combustion was observed, except for the 100% bio-crude oil, with the emission of a large amount of CO. It was also shown that as the ratio of bio-crude oil was increased, NO concentration increased due to the nitrogen content in the bio-crude oil. In the cases where biofuel was blended with diesel fuel, all cases showed close to complete combustion, where the temperature of the combustion chamber was raised with an increasing ratio of diesel.

KCI등재

7Powder-Type 산화칼슘(CaO)을 이용한 육불화황(SF6) 분해 부산물의 고정화 연구

저자 : 류재용 ( Jae Yong Ryu )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 543-552 (10 pages)

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Climate change represents a worldwide warning on global warming and has elevated awareness on the global climate crisis. As a result, worldwide changes to tackle climate change have been initiated. In compliance with the Paris agreement, Korea has declared Carbon Net Zero and implemented legislative changes. Regarding the greenhouse gas emissions in Korea, the mineral industry plays a large role among other industries. A huge amount of greenhouse gases is emitted during the decarboxylation and calcination processes in the cement production process. Therefore, to address the climate crisis, the cement industry also needs to develop technologies to promote carbon neutrality. This study was conducted to explore ways to control SF6, of which GWP is the highest, using cement kiln and thermal plasma, and to recycle the byproduct of pyrolysis into an eco-friendly cement supplementary material by immobilizing it with calcium oxide. The destruction and removal efficiency of SF6 was 100%, while the immobilization reaction rate calculated from the concentration change of the by-product was 99.4%. As a by-product of the immobilization reaction, cement subsidiary raw materials such as fluorite (CaF2) and anhydrite (CaSO4) were generated, and it is thought that recycling of these raw materials is possible.

KCI등재

8폐자원에너지 시설의 환경성 및 경제성 평가에 따른 지원방안 연구

저자 : 박세인 ( Se-in Park ) , 이유민 ( Youmin Lee ) , 남궁훤 ( Hueon Namkung ) , 강준구 ( Jun-gu Kang ) , 전태완 ( Taewan Jeon )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 553-561 (9 pages)

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Although the need for new and renewable energy is increasing, support for waste-to-energy facilities has been reduced as the related laws have been amended. Accordingly, there are concerns about the weakening of the competitiveness of waste-to-energy facilities. Therefore, this research conducted a study on the support methodology for waste-to-energy facilities. To provide support for waste-to-energy facilities, it is necessary to evaluate the related facilities based on common factors. In this study, for the evaluation of waste-to-energy facilities, the environmental indicator was calculated by using the environmental properties of the facility as a factor, while the benefit calculated by examining the energy production of the waste-to-energy facility was used as the economic indicator. In addition, the numerical values of each indicator were simplified through normalization, and the scores of the environmental and economic indicators were calculated by scoring the normalized values. For the calculated result, the sum of the environmental and economical scores was used as the overall score of the facility by applying the indicator reflection ratio.

KCI등재

9코로나 19 고발열 의료폐기물이 소각시설 대기오염물질 배출특성에 미치는 영향

저자 : 이은송 ( Eunsong Lee ) , 김진태 ( Jintae Kim ) , 이정규 ( Jungyu Lee ) , 신완호 ( Wanho Shin ) , 한소영 ( Soyoung Han ) , 홍원석 ( Wonseok Hong ) , 윤진한 ( Jinhan Yun )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 562-571 (10 pages)

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This study evaluated the effect of the COVID-19 pandemic on nitrogen oxides emissions from a medical waste incinerator. During the summer vacation season and year-end periods, the amount of medical waste as well as COVID- 19 patients dramatically increased by 2 to 6 times. In addition, nitrogen oxide emissions increased by approximately 30 % due to the injection of high calorific medical waste into the medical waste incinerator. The increase in medical waste calorific value is attributed to the exclusion of diapers from the medical waste classification and the composition of synthetic resins in waste transport containers. By applying the energy conservation law, the estimated waste calorific value for the months with the highest and lowest nitrogen oxides emissions were ~5,250 kcal/kg and 4,760 kcal/kg, respectively. The correlation between waste calorific value and nitrogen oxide was confirmed. However, the calorific value of medical waste varies for each transport container, and there is a limit in constantly controlling the calorific value of the injected waste. Therefore, to minimize the environmental impact of medical waste incinerators, it is necessary to apply combustion optimization technologies such as flue gas recirculation and air staging combustion to control air pollution.

KCI등재

10천연 가죽 폐기물을 이용한 가스켓 시트 제조에서 가죽 폐기물 및 실리카 충진제별 물성 변화 연구

저자 : 정득준 ( Deukjun Jeong ) , 김관용 ( Gwanyong Kim ) , 이상철 ( Sangchul Lee )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 6호 발행 연도 : 2022 페이지 : pp. 572-579 (8 pages)

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This study is on an upcycle technology for manufacturing gasket sheets using solid waste generated in the manufacturing process of natural leather. Regarding the manufacturing of rubber gasket sheets based on dry manufacturing technology, we studied the crosslinking characteristics and mechanical characteristics of shaving scrap and trimming scrap according to the types of natural leather waste, where the effect of the type of silica used as a reinforcing filler was investigated. As a result, research on industrial recycling items that reduce carbon usage and do not generate wastewater was conducted.

1
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KCI등재

1생물에 의한 미세플라스틱의 섭취(ingestion), 체내 이동(translocation), 배설(egestion)에 관한 고찰 -생물은 미세플라스틱을 섭취 후 배설하는가?-

저자 : 김용진 ( Yong-jin Kim ) , 정승미 ( Seung-mi Jeong ) , 이혜성 ( Hye-sung Lee )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 219-234 (16 pages)

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In this review, data on the ingestion, translocation and egestion of microplastics by different organisms are analysed and summarized to predict the behaviour of microplastics in human body. Microplastics translocation from the gastrointestinal tract to the circulatory system or tissue are associated with the species and groups of organisms and the size of microplastics. Ingested microplastics are translocated to thoracic lymph nodes via macrophages and to the liver, kidney, spleen, heart, brain and secondary target organs via systemic circulation. In the ingestion, translocation, and egestion of microplastics by mammals, particles of >150 μm are rarely translocated or absorbed by organs (except the gut), characterized by a localization effect on the immune system or gut infection. Although microplastics <150 μm are linked to systemic exposure, their absorption remains limited with intense absorption restricted to particles <1.5μ m. Existing studies have focused on laboratory experiments to investigate microplastic concentrations in food, the type of plastics, and morphology (e.g., free or aggregate state, particle size, and shape). To further understand the behaviours of microplastics, systematic and comprehensive studies should be continued.

KCI등재

2상변화물질을 이용한 10 MJ급 열에너지 저장 시스템의 축열 및 방열 특성

저자 : 박동규 ( Dong Kyoo Park ) , 김동주 ( Dongju Kim ) , 구재회 ( Jae-hoi Gu ) , 김동철 ( Dong-cheol Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 235-244 (10 pages)

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The worldwide increase in energy consumption and global climate change leads to a growing interest in the utilization of unused waste heat generated by power plants and industries. In terms of recovery, storage, and reuse of the waste heat, thermal energy storage (TES) technology is considered one of the key technologies. In addition, a heat delivery system using a mobile-TES has been proposed and commercialized in several countries. In this study, heat charging and discharging processes were carried out in a 10 MJ-scale TES unit based on the latent heat of phase change material (PCM). The unit, designed to develop the TES module, has a tube that is finned inside and outside to enhance the heat transfer surface. Docosanol was chosen as a heat storage material, and three types of heat transfer fluids were used: water, steam, and air. The results show that total heat storage using hot water and steam was 49 MJ and 17 MJ at rates of 9 kW and 18 kW, respectively. Most of the heat stored in the TES unit can be discharged at a thermal efficiency of 87 ~ 88%, and hot air can be produced indirectly and directly with efficiencies of 78% and 86%, respectively.

KCI등재

3폐유리 미분말로 치환한 폴리머 콘크리트의 역학적 특성

저자 : 노형진 ( Hyeong-jin Noh ) , 유인근 ( In-geun Yu ) , 김승민 ( Seung-min Kim ) , 백승민 ( Seung-min Beak ) , 김우석 ( Woo-suk Kim ) , 곽윤근 ( Yoon-keun Kwak )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 245-252 (8 pages)

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This study investigated the optimum binder content by analyzing its mechanical properties according to the replacement ratio and amount of calcium carbonate binder, used as a filler for polymer concrete, that was replaced with finely powdered waste glass. To investigate the replacement of polymer concrete fillers with fine waste glass powder instead of the previously used calcium carbonate, experiments were conducted with the binder amount used (11%, 13%, and 15%) and the replacement ratio of calcium carbonate and waste glass (10 : 0, 5 : 5, and 0 : 10). It was found that the replacement ratio of the finely powdered waste glass was suitable up to 50%, and the optimum mixing ratio of binder was 13% for concrete compressive strength and 15% for concrete tensile strength.

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4국내 가연성 폐기물의 입경 및 중량에 따른 시험방법 분석 연구 -가연분 및 회분 함량을 중심으로-

저자 : 이영진 ( Young-jin Lee ) , 강준구 ( Jun-gu Kang ) , 박호연 ( Ho-yeun Park ) , 유하녕 ( Ha-nyoung Yoo ) , 조신영 ( Shin-young Jo ) , 이원석 ( Won-seok Lee ) , 전태완 ( Tae-wan Jeon ) , 신선경 ( Sun-kyoung Shin )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 253-262 (10 pages)

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In the past, waste policies' priority fell in stable treatment. Since the enactment of the Framework Act on Resource Circulation (FARC) in 2018, waste policies have emphasized more the recycling of resources and efficient recovery of energy. On the basis of Appendix 6 of Article 18 of the FARC, an analysis of the combustible contents of mixed waste is now required due to the difficulty in separating combustible and non-combustible waste. This study identified that the optimum conditions for changing various factors such as sample size, quantity, and analysis temperature by waste type. As a result, the size of the sample is 1 mm or less, and the quantity of the sample is 5 g or more. The target waste confirmed the burning temperature to be 300 ~ 600℃, and the analysis temperature of the combustible and ash contents was set at 600 ± 25℃. In addition, standard test methods for the combustible and ash contents in waste are presented.

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5저품위 석회석 및 굴 패각 활용을 위한 습식 배연 탈황 공정 모델링 및 최적화 연구

저자 : 임종훈 ( Jonghun Lim ) , 김정환 ( Junghwan Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 263-274 (12 pages)

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The wet flue gas desulfurization process, which added the mixing process, was simulated to predict the quality of gypsum, considering a low-grade limestone and waste oyster shell. High-grade limestone with more than 94 wt% CaCO3 content is used for producing the gypsum with 93 wt% purity that is available for sale. However, low-grade limestone also needs to be used because of resource depletion. Low-grade limestone might not be used because it contains many impurities that reduce the quality of the gypsum; however, it can be used in a mixture with oyster shell. For process modeling, low-grade limestone and oyster shell were mixed through a mixer model and entered the reactor model. The dissolution reaction of CaCO3, the absorption of SOx, and the crystallization of gypsum were considered in two stages using an equilibrium reactor. Thermodynamic models used the NRTL model for the gas-liquid equilibrium and the van't Hoff solubility method for the solid-liquid equilibrium. For process optimization, the following constraints were set: 93% purity of gypsum, 94% desulfurization efficiency, and 3,710 kg/h in total absorbent usage, and the objective function was set to maximize the mass flow of oyster shell. The maximum blending quantity of low-grade limestone for 2,275 kg/h in waste oyster shell that satisfied the constraints was ~ 1,435 kg. For the economic analysis, the total capital investment (TCI) increased to KRW 545,690,970, but the annual operation and maintenance (O&M) cost decreased to KRW 122,270,721, allowing the payback time to be estimated at approximately 4.5 years.

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6미세조류의 혐기성 수소 발효 시 초음파와 열적 전처리의 영향

저자 : 변성주 ( Sung-ju Byun ) , 이채영 ( Chae-young Lee )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 275-283 (9 pages)

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This study was conducted to evaluate the effects of pretreatment on anaerobic hydrogen fermentation of Chlorella vulgaris (C. vulgaris). Ultrasonication (1 to 10 min at 20 kHz) and thermal pretreatment (70 to 150℃ for 20 min) were applied to increase disintegration efficiency and hydrogen yield from C. vulgaris. Optimal results were obtained with a 5-min-ultrasonication followed by thermal pretreatment at 150℃, showing a disintegration efficiency of 59.4%. The highest hydrogen yield was 45.1 mL H2/g dcw with 5-min-ultrasonication followed by thermal pretreatment at 110℃. This value was about 15 times higher than that obtained without any pretreatment (3.1 mL H2/g dcw). The results of this study suggested that a combination of ultrasonication and thermal pretreatment on C. vulgaris microalgae could increase the disintegration efficiency and hydrogen yield from C. vulgaris via anaerobic hydrogen fermentation.

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7폐TV 내 PBDEs의 전과정 단계별 정적 및 동적 물질흐름분석 연구

저자 : 박휘언 ( Hwi-eon Park ) , 장용철 ( Yong-chul Jang ) , 김현희 ( Hyun-hee Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 284-294 (11 pages)

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In this study, a static and dynamic material flow analysis (MFA) of polybrominated diphenyl ethers (PBDEs) emitted from end-of-life televisions (TVs) was conducted by examining their life cycle. Domestic end-of-life TV waste generation was approximately 200,900 tons. Among them, 42,000 tons of the TV waste was treated in formal ways, but 18,000 tons of the TV waste was treated in informal ways. About 94 tons and 36 tons of PBDEs were emitted from the TV production and use stages, respectively. The amount of PBDEs that are separated from the TV recycling facilities was approximately 57 tons. Cumulative amounts of PBDEs at the production stage was 18,176 tons. Since 2016 there has been no report of PBDEs emitted from cathode ray tube (CRT) TVs during their usage. It was estimated that by 2030 the amount of PBDEs generated from liquid-crystal display (LCD) TVs will be about 39 tons. In the collection and recycling stages, the overall PBDEs emissions were minimum in 2017. The generation of PBDEs emitted from CRT TVs has been decreasing linearly from 2001 to 2017. The predicted emission of PBDEs by LCD TVs will be 37 tons by 2030. This study may help develop a management strategy to properly treat TV wastes.

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8수열탄화를 이용한 하수슬러지와 전정부산물 hydrochar의 특성 평가

저자 : 조우리 ( Woori Cho ) , 김장영 ( Jang Yeong Kim ) , 이진주 ( Jin Ju Lee ) , 이재영 ( Jai-young Lee )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 37권 4호 발행 연도 : 2020 페이지 : pp. 295-300 (6 pages)

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As an efficient way of reusing sewage sludge as a solid fuel, hydrochars were made from sewage sludge and wood waste via hydrothermal carbonization (HTC). Optimal HTC conditions were determined to be 220℃ for 2 h with varying the ratio of sewage sludge to wood waste. Mixing sewage sludge and wood waste improved the fuel properties (carbonization degree and lower heating value) of the hydrochar. It was determined that the nitrogen content of the hydrochar was decreased by mixing of the products. When the amount of wood waste that was mixed with sewage sludge was low, the ash content was increased. For the efficient reusing of sewage sludge as a solid fuel (hydrochar), more waste wood should be mixed with sewage sludge.

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