• 제목/요약/키워드: sequestration

검색결과 485건 처리시간 0.103초

탄소흡수원을 고려한 개발사업 환경영향평가 방안(I) - 태양광발전소 건설사업 사례를 중심으로 - (Environmental Impact Assessment for Development Projects Considering Carbon Sink and Sequestration(I) - Focused on a Solar Power Plant Development Project -)

  • 황상일;박선환
    • 환경영향평가
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    • 제19권6호
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    • pp.625-631
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    • 2010
  • The objective of this work was to investigate how carbon sink and sequestration of vegetation and soil in the development project area can impact the land use plan, in addition to carbon emission capacity of the development project when we conduct environmental impact assessment. Especially, we did this work for a development project of solar power plant which would be constructed in forest area. Through this work, we found that 1) the amount of carbon sink and sequestration largely decreased due to reduction of the green area, 2) in terms of carbon sink and sequestration, conservation of natural green area is better than construction of newly vegetated area, 3) biochar application into soil can become an alternative for increase of carbon sink, and 4) even though a solar power production does hugely reduce carbon emissions and offset the carbon sink and sequestration capacity from the forest, it is necessary to consider the public value of the forest(reduction of heat island, habitat etc.) in siting for development area.

Sequestration and Bioavailability of Organopollutants in Soil;Their Implication to the Risk Assessment

  • Chung, Nam-Hyun;Lee, Il-Seok;Song, Hee-Sang;Bang, Won-Gi
    • 한국환경농학회지
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    • 제19권5호
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    • pp.442-449
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    • 2000
  • The bioremediation is an economic technology to remove the organopollutants from soil. It is often found that the remediation could not remove the compounds below the levels determined by vigorous extractions as required by regulatory agencies. The reason for the reduced bioavailability with increasing time of aging has been accredited to the sequestration of the compounds in remote sites within or between soil particles. Then, the aging could be defined as the time-dependent sequestration. Partitioning and entrapment have been suggested as mechanism for aging. The rate and extent of the sequestration varies among dissimilar soils. The bioavailability of aged pollutants in soil could be measured by bioassays, mild solvent extraction, and soild-phase extractions. The sequestration could be affected by many factors including various soil properties, wetting and drying cycle, and the presence of cosolutes and NAPLs etc. The bioavailability and sequestration should be considered to determine the environmentally acceptable endpoint.

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CO2 해양격리시스템의 기술.경제적 가능성평가 (Economic Feasibility Study for CO2 Ocean Sequestration)

  • 박세헌;오위영;권문상
    • Ocean and Polar Research
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    • 제27권4호
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    • pp.451-461
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    • 2005
  • The $CO_2$ storage in geologic and oceanic reservoirs is considered to be one of the carbon management strategies for responding to global climate change. Ocean carbon sequestration is purposeful storage acceleration into the ocean of large amounts of carbon that would accumulate in the atmosphere and naturally enter the ocean over a longer timespan. Some technologies for $CO_2$ ocean sequestrations have been developed as a nation project. However, $CO_2$ ocean sequestrations are attractive because they have the advantage of vast capacity sequestration far away from industrial areas, and offer easier monitoring whereas less economic advantage has been indicated as one of the key barriers compared with $CO_2$ geosphere sequestration, which is produced as a byproduct. In this paper, a conceptual design for $CO_2$ ocean sequestration is introduced, and the preliminary examination is described. As a result, the $CO_2$ price, US$ 24/t shows far away from the economics. The causes come from the expensive $CO_2$ recovery cost and the low $CO_2$ price. The expensive $CO_2$ recovery cost is because too much electricity and water are consumed. In order to look for an economic balance point for $CO_2$ ocean sequestration, NPV=0, it is increases the $CO_2$ price. Finally 60.4$ per ton is found to be the balance price.

외엽형 폐격리증을 동반한 선천성 낭종성 신종양 기형 - 1례 보고 - (Congenital Cystic Adenomatoid Malformation Associated with Extralobar Pulmonary Sequestration - A case report -)

  • 이재광;권종범;박건;곽문섭;심성보
    • Journal of Chest Surgery
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    • 제33권7호
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    • pp.594-596
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    • 2000
  • 선천성 낭종성 선종양 기형과 외엽형 폐격리증은 아주 드문 질환이다. 본원에서는 4세 된 여자환자에서 좌폐화엽의 선천성 낭종성 선종양 기형을 수술하던 중 우연히 외엽형 폐격리증이 동반된 것을 알고 좌폐하엽 절제술과 외엽형 폐격리증 절제술을 시행하였는데, 외엽형 폐격리증은 흉부대동맥에서 비정상적으로 직접 1개의 동맥으로 유입되고, 늑간정맥을 통하여 기정맥으로 유출되었다. 환자는 수술 후 건강하게 퇴원하였다.

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가속탄산화를 통한 Ca-rich Waste Mineral의 정량적인 CO2 고용량 평가 (Quantitative Evaluation of CO2 Sequestration in Ca-rich Waste Mineral for Accelerated Carbonation)

  • 남성영;엄남일;안지환
    • 한국세라믹학회지
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    • 제51권2호
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    • pp.64-71
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    • 2014
  • Accelerated carbonation is a technique that can be used as a CCS technology for $CO_2$ sequestration of approximately 5~20% in a stable solid through the precipitation of carbonate. An alkaline inorganic waste material such as ash, slag, and cement paste are generated from incinerators, accelerated carbonation offers the advantage of lower transport and processing costs at the same generation location of waste and $CO_2$. In this study, we evaluated an amount of $CO_2$ sequestration in various types of inorganic alkaline waste processed by means of accelerated carbonation. A quantitative evaluation of $CO_2$ real sequestration based on a TG/DTA analysis, the maximum 118.88 $g/kg_{-waste}$ of $CO_2$ in paper sludge fly ash, the maximum 134.46 $g/kg_{-waste}$ of $CO_2$ in municipal solid waste incinerator bottom ash, the maximum 9.72 $g/kg_{-waste}$ of $CO_2$ in industrial solid waste incinerator fly ash, and the maximum $18.19g/kg_{-waste}$ of $CO_2$ in waste cement paste.

내엽형 폐격리증 1예 (A Case of Intralobar Pulmonary Sequestration)

  • 서해숙;박문환;이명선;유남수;조동일;허용
    • Tuberculosis and Respiratory Diseases
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    • 제40권6호
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    • pp.736-741
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    • 1993
  • Pulmonary sequestration is the part of a spectrum of bronchopulmonary foregut anomalies in which a portion of lung parenchyma does not communicate with the tracheobronchial tree and usually receives its arterial supply from a systemic vessel. The sequestrated portion of the lung is susceptible to infection. The patient with this entity will have a paucity of symptoms and will present himself for treatment because of a persistent pneumonia. The associated aberrant systemic artery makes the preoperative diagnosis of the lesion imperative because of the life-threatening technical hazards posed by this artery. We experienced a case of intralobar pulmonary sequestration. Initially, the diagnosis of sequestration was unsuspected and open thoracotomy was done for management of homogenous cystic mass on left lower lobe, but one anomalous systemic artery from thoracic descending aorta to sequestrated lung was incidentally revealed. Then we underwent lower lobectomy and ligation of anomalous artery.

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Pulmonary Sequestration [2례 보고] (Pulmonary Sequestration: report of 2 cases)

  • 남충희
    • Journal of Chest Surgery
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    • 제14권4호
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    • pp.350-353
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    • 1981
  • The pulmonary sequestration is an uncommon congenital anomaly characterized by the presence of a part of lung tissue which is supplied by an aberrant artery from the aorta or its branch and usually has no communication with the normal bronchial tree. It was first presented by Hubber in 1777 and presented in details by Pryce in 1946. We present a case of extralobar pulmonary sequestration experienced recently with a case of intralobar type experienced in 1962. The patient was 11 year old male with the complaint of chronic productive cough. Serial chest films showed a large cyst with or without the air-fluid level on the posterobasal segment area of the left lower lobe. Bronchography showed no definite communication between the cyst and bronchial tree. On operation, the cystic lesion was supplied by an aberrant artery from the descending thoracic aorta 5 cm above the aortic hiatus and was sited at the posterobasal segment area of the left lower lobe. We performed the sequestrectomy and the sequestration was surrounded by its own pleura, 6.8x3.9x3.2 cm in size, contained the pale brown mucoid secretion in a large cyst and showed the primitive alveolar structure of the wall. The aberrant artery was 1 -5 cm long, 0.3 mm in internal diameter and arterio-sclerotic. We also compared 6 cases of collection, 5 intralobar and 1 extralobar type, presented in Korea.

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Effects of vessel-pipe coupled dynamics on the discharged CO2 behavior for CO2 sequestration

  • Bakti, Farid P.;Kim, Moo-Hyun
    • Ocean Systems Engineering
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    • 제10권3호
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    • pp.317-332
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    • 2020
  • This study examines the behaviors and properties of discharged liquid CO2 from a long elastic pipe moving with a vessel for the oceanic CO2 sequestration by considering pipe dynamics and vessel motions. The coupled vessel-pipe dynamic analysis for a typical configuration is done in the frequency and time domain using the ORCAFLEX program. The system's characteristics, such as vessel RAOs and pipe-axial-velocity transfer function, are identified by applying a broadband white noise wave spectrum to the vessel-pipe dynamic system. The frequency shift of the vessel's RAO due to the encounter-frequency effect is also investigated through the system identification method. Additionally, the time histories of the tip-of-pipe velocities, along with the corresponding discharged droplet size and Weber numbers, are generated for two different sea states. The comparison between the stiff non-oscillating pipe with the flexible oscillating pipe shows the effect of the vessel and pipe dynamics to the discharged CO2 droplet size and Weber number. The pipe's axial-mode resonance is the leading cause of the fluctuation of the discharged CO2 properties. The significant variation of the discharged CO2 properties observed in this study shows the importance of considering the vessel-pipe motions when designing oceanic CO2 sequestration strategy, including suitable sequestration locations, discharge rate, towing speed, and sea states.

Communicating Bronchopulmonary Foregut Malformation Type III with Pulmonary Sequestration Diagnosed in a Newborn: A Case Report

  • Kim, Su Kyung;Choi, Jin Wha;Kim, Hong Kwan;Sung, Se In;Chang, Yun Sil;Park, Won Soon
    • Neonatal Medicine
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    • 제26권4호
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    • pp.223-228
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    • 2019
  • Communicating bronchopulmonary foregut malformation (CBPFM) is a communication between the respiratory and gastrointestinal tracts that can be difficult to differentiate from pulmonary sequestration or H-type tracheoesophageal fistula (TEF) because of the similarities in clinical features. A female neonate born at full term had been experiencing respiratory difficulty during feeding from the third day of life. The esophagography performed to rule out H-type TEF revealed that the esophageal bronchus directly communicated with the left lower lobe (LLL) of the lung. Lobectomy of the LLL, fistulectomy of the esophagobronchial fistula, and primary repair of the esophagus were performed. Finally, CBPFM type III with pulmonary sequestration was confirmed on the basis of the postoperative histopathological finding. We report the first newborn case of CBPFM type III with pulmonary sequestration in Korea.

폐분획증이 없는 좌측 하폐엽의 이상 기시 체혈관 (Anomalous Systemic Arterial Supply to Normal Basal Segments of Left Lower Lobe without Sequestration)

  • 홍성범;박정민;안병희;김상형;나국주
    • Journal of Chest Surgery
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    • 제38권7호
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    • pp.510-513
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    • 2005
  • 폐분획증 없는 정상적인 폐분엽에 혈액 공급하는 이상 기시 체혈관은 매우 드문 질환이다. 이것은 Pryce의 용어 정의에 따라 폐분획증의 한 종류로 분류되기도 하지만, 정상적인 기관지 교통 관계 때문에 아직 논란이 있다. 최근 본원에서 수술로 치료한 정상적인 폐분엽에 혈액 공급하는 이상 기시 체혈관을 치험하였기에 보고하고자 한다.