남극지역의 대기오염 측정체계 구축을 위한 기초조사

Preliminary Survey for the Design of the Air Pollution Monitoring System in Antarctic Area

From January through February 2000, the SO₂, NO₂. and VOCs (Volatile organic compounds) concentrations were measured at the total 15 sites (between 6213S and 6214S. between 5846W and 5848W) around the King Sejong Station located in King George Island. The badge type of SO₂ and NO₂ passive diffusion samplers impregnated with 5% Na₂C0₃and TEA. respectively and VOC passive samplers including activated carbon filter were used. The samplers brought back to the laboratory were analyzed with IC or GC after extracting by distilled pure water, H₂O₂, or CS₂. Considering that the concentration level of each compound analyzed are very low in Antarctica. the blanks and instrumental detection limits were also determined. The blanks of SO₂ and NO₂ sampler were found to be 0.63 ppb and 0.49 ppb, respectively. Measured concentrations range from <LOD to 1.58 ppb for NO₂ and from <LOD to 0.44 ppb for SO₂. For ten species of VOCs investigated. on the other hand. most of compounds except for toluene and benzene could not be detected because of extremely low concentrations below the instrumental detection limits. Measured concentrations range from <LOD to 0.96ppb for toluene and from <LOD to 0.22 ppb for benzene. Although the concentrations of most gaseous contaminants investigated are observed to be very low. our results clearly show that anthropogenic emissions at King Sejong Station affect the concentrations of several of these compounds. The limited but valuable data presented in this study will be helpful to establish the systematic air monitoring system in the near future.