[논문]WASHING-ELECTROKINETIC DECONTAMINATION FOR CONCRETE CONTAMINATED WITH COBALT AND CESIUM

Kim, Gye-Nam; Yang, Byeong-Il; Choi, Wang-Kyu; Lee, Kune-Woo; Hyeon, Jay-Hyeok

doi:10.5516/net.2009.41.8.1079

WASHING-ELECTROKINETIC DECONTAMINATION FOR CONCRETE CONTAMINATED WITH COBALT AND CESIUM 원문보기

Nuclear engineering and technology : an international journal of the Korean Nuclear Society, v.41 no.8, 2009년, pp.1079 - 1086

Kim, Gye-Nam (Korea Atomic Energy Research Institute) , Yang, Byeong-Il (Korea Atomic Energy Research Institute) , Choi, Wang-Kyu (Korea Atomic Energy Research Institute) , Lee, Kune-Woo (Korea Atomic Energy Research Institute) , Hyeon, Jay-Hyeok (Chungnam University)

Abstract ▼ AI-Helper

A great volume of radioactive concrete is generated during the operation and the decommissioning of nuclear facilities. The washing-electrokinetic technology in this study, which combined an electrokinetic method and a washing method, was developed to decontaminate the concrete generated in nuclear facilities. The results of only an electrokinetic decontamination for the concrete showed that cobalt was removed to below 1% from the concrete due to its high pH. Therefore, the washing-electrokinetic technology was applied to lower the pH of the concrete. Namely, when the concrete was washed with 3 M of hydrochloric acid for 4 hours (0.17 day), the $CaCO_3$ in the concrete was decomposed into $CO_2$ and the pH of the concrete was reduced to 3.7, and the cobalt and cesium in the concrete were removed by up to 85.0% and 76.3% respectively. Next, when the washed concrete was decontaminated by the electrokinetic method with 0.01M of acetic acid in the 1L electrokinetic equipment for 14.83 days, the cobalt and the cesium in the concrete were both removed by up to 99.7% and 99.6% respectively. The removal efficiencies of the cobalt and cesium by 0.01M of acetic acid were increased more than those by 0.05M of acetic acid due to the increase of the concrete zeta potential. The total effluent volume generated from the washing-electrokinetic decontamination was 11.55L (7.2ml/g).

주제어

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

가설 설정

Meanwhile, the zeta potential of the concrete versus the acetic acid concentration is shown in Fig. 4. When the concentration of the acetic acid was more than 0.1M, the zeta potential of the concrete was positive and the acetic acid solution in the concrete cell flowed to the anode compartment due to an electro-osmosis. Therefore, the electrode location in this experiment was in the opposite direction to that of the soil electrokinetic experiment.

제안 방법

In order to maintain the pH of the concrete near the cathode at lower than 6, acetic acid was injected periodically into the cathode compartment. Also, after the completion of the experiment for 15 days, the concrete in the concrete cell was divided into 6 sections and dried for more than 3 days to analyze the removal efficiencies of the cobalt and cesium ions from the concrete.
In this study, in order to decontaminate crushed concrete under 0.5 cm in size, an electrokinetic decontamination was performed. However, the decontamination efficiency was very low because the pH of the concrete was more than 6.
Therefore, if the radioactive concentration of the concrete is decontaminated to below a selfedisposal basis concentration (about 100 Bq/kg), it can be disposed of in reclaimed land cheaper than disposal in a middle-low level radioactive repositoiy. In this study, washing-electrokinetic technology was developed to decontaminate the concrete generated in nuclear facilities, which combined an electrokinetic method and a washing method.
1, 600 g of concrete was put into a concrete cell, whose pH was lowered to below 4. The electric current across the concrete cell, the flow rate and the concentration of the waste solution in the cathode compartment, and the pH in the cathode compartment were measured periodically throughout the duration of the experiment. In order to maintain the pH of the concrete near the cathode at lower than 6, acetic acid was injected periodically into the anode compartment.
The electrode location in this experiment was like the previous experiment. The electric current across the concrete cell, the flow rates and the concentrations of the waste solution in both electrode compartments, and the pH in the cathode compartment were measured periodically throughout the duration of the experiment. In order to maintain the pH of the concrete near the cathode at lower than 6, acetic acid was injected periodically into the cathode compartment.
Therefore, the electrode location in this experiment was in the opposite direction to that of the soil electrokinetic experiment. The electric current across the concrete cell, the flow rates of the waste solution and the concentrations of the waste solution in both electrode compartments, and the pH in the cathode compartment were measured periodically throughout the duration of an experiment. The pH in cathode compartment increased with time elapse due to the generation of hydroxide as the following equations.

대상 데이터

01 M of cobalt and cesium and then it was dried more than a week for an equal concentration. A simulated crushed concrete was used in this study. Meanwhile, the zeta potential of a concrete particle was measured by ELS-8000.
the experiment. It consisted of an acryl concrete cell, two electrode compartments, an electrolyte solution reservoir, an effluent storage reservoir, and a power supply (Fig. 3). The contaminated concrete was placed into an acryl concrete cell of 10.

참고문헌 (22)

K. Popov, I. Glazkova, V.Yachmenev and A. Nikolayev, “Electrokinetic Remediation of Concrete: Effect of Chelating Agents,” Environmental Pollution, 153, 22(2008)

상세보기
D. Voinitchi, S. Julien and S. Lorente, “The Relation between Electrokinetics and Chloride Transport through Cement- Based Materials,” Cement & Concrete Composites, 30, 157 (2008)

상세보기
M. T. Harris, D. W. Depaoli and M. R. Ally, “Modeling the Electrokinetic Decontamination of Concrete,” Separation Science and Technology, 32, 827(1997)

상세보기
M. T. Harris, D. W. Depaoli and M. R. Ally, “Investigation of Electrokinetic Decontamination of Concrete,” Separation Science and Technology, 32, 387(1997)

상세보기
F. Braud, S. Tellier and M. Astruc, “Modeling of Decontamination Rate in an Electrokinetic soil Processing,” International Journal of Environmental Analytical Chemistry, 68, 105(1998)

상세보기
S. O. Kim, S. H. Moon, and K. W. Kim, “Removal of Heavy Metals from Soils Using Enhanced Electrokinetic Soil Processing,” Water, Air, and Soil Pollution., 125, 259 (2001)

상세보기
M. M. Page and C. L. Page, “Electroremediation of Contaminated Soils,” Journal of Environmental Engineering, ASCE, 128, 208(2002)

상세보기
C. Chaiyaraksa and N. Sriwiriyanuphap, “Batch Washing of Cadmium from Soil and Sludge by Mixture of $Na_{2}S_{2}O_{5}$ and $Na_{2} EDTA,” Chemosphere, 546, 129 (2004)

상세보기
C.G. Rampley and K.L.Ogden, “Preliminary Studies for Removal of Lead from Surrogate and Real Soils Using a Water Soluble Chelator, Adsorption and Batch Extraction,” Environ. Sci. Technol., 32(7), 987(1988)

상세보기
B. Sun, F.J. Zhao, E. Lombi and S.P. McGrath, “Leaching of Heavy Metals from Contaminated Soil Using EDTA,” Environ Pollut., 113, 111(2001)

상세보기
R. Abumaizar and L.L. Khan, “Laboratory Investigation of Heavy Metal Removal by Soil Washing,” J. Air Waste Manage. Assoc., 46, 765(1996)

상세보기
B. Kornilovich, N. Mishchuk, K. Abbruzzese, G. Pshinko and R. Klishchenko. “Enhanced Eletrokinetic Remediation of Metals-Contaminated clay,” Colloids and Surfaces A:Physicochem. Eng. Aspects., 265, 114(2005)

상세보기
A. Giannis, E. Gidarakos and A. Skouta, “Application of Sodium Dodecyl Sulfate and Humic Acid as Surfactants on Electrokinetic Remediation of Cadmium-Contaminated Soil,” Desalination, 211, 249(2007)

상세보기
K. Popov, I. Glazkova, A. Petrov and E. Sedykh, “Zeta- Potential of Concrete in Presence of Chelating Agents,” Colloids and Surfaces, 299, 198(2007)

상세보기
B. Sun, J. Zhao, E. Lombi and S.P. McGrath, “Leatching of Heavy Metals from Contaminated Soils Using EDTA,” Environ. Pollut., 113, 111(2001)

상세보기
R. Bassi, S. O. Prasher and B. K. Simpson, “Extraction of Metals from a Contaminated Sandy Soil Using Citric Acid,” Environ. Prog., 19(4), 275(2000)

상세보기
G.M. Nystrom, “Investigations of Soil Solution during Enhanced Electodialytic Soil Remediation,” Report No.BYG-DTU R009, Denmark Technical University, 21, (2001)
R. J. Shiau, R.L. Smith and B. Aveller, “Effects of Steam Explosion Processing and Organic Acids on CCA Removal from Treated Wood Waste,” Wood Sci. Technol., 34, 377 (2000)

상세보기
S. Tampouris, N. Papassiopi and I. Paspaliaris, 'Removal of Contaminant Metals from Fine Grained Soils, Using Agglomeration, Chloride Solution and Pile Leaching Techniques,' J. Hazard. Mater., B84, 297(2001)

상세보기
H.A. Elliot and N.L. Shastri, “Extractive Decontamination of Metal-Polluted Soils Using Oxalate,” Water Air Soil Pollut, 110, 335(1999)

상세보기
W. Stumm, Chemistry of the Solid-Water Interface, p. 165, Wiley-Interscience, New York (1992)
G. N. Kim, Y. H. Jung, J. K. Moon, and C. H. Jung, “Development of Electrokinetic Flushing Technology for Remediation of the Contaminated Site Around Nuclear Facilities,” Journal of Korea Society of Waste Management, 24(4), 146(2008)

저자의 다른 논문 :

LOADING...

원문 URL 링크

DOI : 10.5516/NET.2009.41.8.1079 [무료]
한국원자력학회 : 저널
Korea Open Access Journals : 저널
AccessON : 저널

*원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다.

오픈액세스(OA) 유형

BRONZE

출판사/학술단체 등이 한시적으로 특별한 프로모션 또는 일정기간 경과 후 접근을 허용하여, 출판사/학술단체 등의 사이트에서 이용 가능한 논문

연관된 기능

이 논문과 함께 이용한 콘텐츠

[논문] Decontamination of radioactive wastewater by two-staged chemical precipitation

저작권 관리 안내

내보내기 메뉴

내보내기 구분

파일저장
인쇄
메일전송

구성항목

기본정보
상세정보

관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관

저장형식

Text(ASCII format)
Excel format
RefWorks Direct Export
RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley

메일정보

받는사람 (필수): @
보내는사람 (선택): @
제목
내용: KISTI 검색결과 이메일 서비스

안내

총 건의 자료가 검색되었습니다.

다운받으실 자료의 인덱스를 입력하세요. (1-10,000)

검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다.

데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요)

다운로드 파일은 UTF-8 형태로 저장됩니다.
파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오.

Text(ASCII format)
Excel format

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

AI-Helper ※ AI-Helper는 을 사용합니다.

AI-Helper

안녕하세요, AI-Helper입니다. 좌측 "선택된 텍스트"에서 텍스트를 선택하여 요약, 번역, 용어설명을 실행하세요.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.

연합인증