• 월간 한농연
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• s.72
• /
• pp.2-2
• /
• 2008

• Nuclear industry
• /
• v.28 no.10
• /
• pp.2-4
• /
• 2008

• 월간 한농연
• /
• s.74
• /
• pp.2-2
• /
• 2008

• 베이커리
• /
• no.12 s.305
• /
• pp.42-42
• /
• 1993

• 주택과사람들
• /
• s.220
• /
• pp.91-91
• /
• 2008

• Nuclear industry
• /
• v.28 no.9
• /
• pp.54-56
• /
• 2008

• KOREAN POULTRY JOURNAL
• /
• v.18 no.3 s.197
• /
• pp.60-61
• /
• 1986

• 베이커리
• /
• no.4 s.309
• /
• pp.71-71
• /
• 1994

• Journal of the Korean GEO-environmental Society
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• v.8 no.2
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• pp.41-48
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• 2007

Zevo-valent iron (ZVI) has been widely used in permeable reactive barriers for reducing organic contaminants, such as trichloroethylene (TCE). The rapid reaction time, however, leads to decrease in reactivity and availability of ZVI. Shewanella algae BrY, a strain of dissimilatory iron reducing bacteria, can reduce the oxidized Fe (III) to Fe (II) and reduced Fe (II) can be reused to reduce the contaminant. The effect of Shewanella algae BrY on the reduction of the oxidized ZVI column and further TCE removal in the contaminated groundwater were studied at different flow rates and TCE input concentrations in this study. High input concentration of TCE and flow rate increase the amount of input contaminant and make to lower the effect of reduction by Shewanella algae BrY. Specially, the fast flow rate inhibits the direct contact and implantation on the surface of iron. The reduction of oxidized iron reactive barrier by Shewanella algae BrY can decrease the decreation of duration of PRBs by the precipitation of oxidized iron produced by dechlorination of TCE.

• Korean Journal of Remote Sensing
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• v.38 no.2
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• pp.215-222
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• 2022

In this study, the effect of wavelength range and absorption cross-section used to retrieve nitrogen dioxide (NO₂) vertical column density (VCD) from Pandora was analyzed using Differential Optical Absorption Spectroscopy (DOAS). During the GEMS Map of the Air Pollution (GMAP) 2020 campaign, data from direct sunlight observation with Pandora instrument in Seosan was used, and NO₂ VCD was retrieved under four conditions. The average NO₂ VCD under the four conditions ranged from 1.22×10¹⁶~1.38×10¹⁶ molec. cm^-2, with a maximum difference of 0.16×10¹⁶ molec. cm^-2 between each condition. The fitting error averaged 3.19~9.59%, showing an error within 10% in all cases, and the RMS was 5.11×10^-3~7.16×10^-3 molec. cm^-2. The retrieved NO₂ VCD using 4 conditions shows a slope in the range of 0.98 to 1.09 and correlation of 0.96 to 0.98 in comparison with Pandonia Global Network (PGN).