지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Subcritical water which acts as organic solvent with increasing temperature and pressure because dielectric constant and viscosity decrease can be used to remediate PAHs-contaminated soil. Factors influencing on extraction were studied with varying the water temperature $200{\sim}275^{\circ}C$, extraction time 0~90 min, flow rate 10~100 mL/min and pressure 3.9~10MPa. 300 g of soil sample which was contaminated with PAHs(naphthalene, phenanthrene, fluoranthene and pyrene; 423, 420, 539 and 428 mg/kg of initial concentration) was packed into the cell and placed to reactor and then the subcritical water was pumped through the cell for PAHs extraction. Naphthalene was removed almost 100% at relatively low temperature ($200^{\circ}C$). The removal rate of phenanthrene, fluoranthene, and pyrene increased by 8, 26, and 23% when the temperature increased from 200 to $275^{\circ}C$; and it was gradually increased as extraction time increased from 0 to 90 min. Decreasing removal rate when water flow rate increased from 10 to 30 mL/min, but there was no significant change after 30 mL/min. This is supposed due to channeling phenomenon. The pressure was not an effective factor for extraction of PAHs in this study. Based on the results, the importance of effective factor was in following sequence: temperature >> time > flow rate.
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참고문헌 (26)
참고문헌 신청
Akinlua, A. / 2010 / Subcritical water extraction of trace metals from petroleum source rock / Talanta 81:1346~1349
Anekpankul, T. / 2007 / Extraction of anti-cancer damnacanthal from roots of Morinda citrifolia by subcritical water / Sep. Purif. Technol. 55:343~349
Chang, M. S. / 2011 / Subcritical water extraction for the remediation of phthalate estercontaminated soil / J. Hazard. Mater. 192:1203~1209
Chienthavorn, O. / 2006 / Modified superheated water extraction of pesticides from spiked sediment and soil / Anal. Bioanal. Chem. 385:83~89
천만영 / 2010 / 토양입자 크기별 PAHs 농도 특성 / 한국환경분석학회지 13(2):104~108
Anekpankul, T. / 2007 / Extraction of anti-cancer damnacanthal from roots of Morinda citrifolia by subcritical water / Sep. Purif. Technol. 55:343~349
Chang, M. S. / 2011 / Subcritical water extraction for the remediation of phthalate estercontaminated soil / J. Hazard. Mater. 192:1203~1209
Chienthavorn, O. / 2006 / Modified superheated water extraction of pesticides from spiked sediment and soil / Anal. Bioanal. Chem. 385:83~89
천만영 / 2010 / 토양입자 크기별 PAHs 농도 특성 / 한국환경분석학회지 13(2):104~108
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