The study goal was to evaluate Pb isotope ratio(Pb206/Pb204, Pb207/Pb206, Pb208/Pb206) as well as to identify pollution sources in residential area according to distance from major metal industrial complex for the characterization of the air particulate composition in Pohang. Sampling was carried ou...
The study goal was to evaluate Pb isotope ratio(Pb206/Pb204, Pb207/Pb206, Pb208/Pb206) as well as to identify pollution sources in residential area according to distance from major metal industrial complex for the characterization of the air particulate composition in Pohang. Sampling was carried out at several sites in the metal industrial complex area(MIA), residential area 1(radius 1 km) and residential area 2(radius 6.5 km). The sampling periods was from February 2004 until October 2004. Most of PM 10 samples were collected on 24 hours basis, using conventional high volume samplers with the inlet in each site. At PM10 average value of winter and summer from MIA, RA1S(Residential area NO. 1 sample) and RA2S(Residential area NO. 2 sample) arithmetic consistency it was to scope of 1.6-2.1 times. RA1S was revealed 26-32% high concentration than RA2S through comparison of RA1S with RA2S for mean concentration of PM10, relationless season. In assessment of contribution to industrial sources were 44.9% and were higher other previous study in MIA. Though, contribution to metallurgy/soil dust source was 33.4% in RA1S, on the other hand contribution to soil dust was 54% in RA2S, so residential A near MIA was more relatively contributed by industrial source. Consequently, supposition was based upon RA1S near MIA was more influenced by industrial sources emitted by MIA than RA2S was confirmed by result of mean concentration Lead isotope compositions in PM10(Pb206/Pb204, 18.067; Pb207/Pb206, 0.879; Pb208/Pb206, 2.141) are clearly distinct from the tunnel air sample(vehicle exhaust particles). By averaging the lead isotope ratio of PM10 samples from eight sites in Phohang, the typical values for the ratio of Pb206/Pb204, Pb207/Pb206, and Pb208/Pb206 are 17.796, 0.858, and 2.073, it seems that the contribution from tunnel air samples(automotive emission) has slightly decreased since the phase-out of leaded gasoline in 1997. However, considering the limited precision of Pb isotope ratio measurement with higher precision by using instruments, such as multi-collector Inductively coupled plasma mass spectrometry(ICP-MS) or Thermal Ionization Mass Spectrometry (TIMS), in the future studies, in order to verify this interesting observation. The Pb isotope ratios obtained in the source-related samples confirmed that the major emission sources are SST(tunnel air sample), iron dust, and slag.
The study goal was to evaluate Pb isotope ratio(Pb206/Pb204, Pb207/Pb206, Pb208/Pb206) as well as to identify pollution sources in residential area according to distance from major metal industrial complex for the characterization of the air particulate composition in Pohang. Sampling was carried out at several sites in the metal industrial complex area(MIA), residential area 1(radius 1 km) and residential area 2(radius 6.5 km). The sampling periods was from February 2004 until October 2004. Most of PM 10 samples were collected on 24 hours basis, using conventional high volume samplers with the inlet in each site. At PM10 average value of winter and summer from MIA, RA1S(Residential area NO. 1 sample) and RA2S(Residential area NO. 2 sample) arithmetic consistency it was to scope of 1.6-2.1 times. RA1S was revealed 26-32% high concentration than RA2S through comparison of RA1S with RA2S for mean concentration of PM10, relationless season. In assessment of contribution to industrial sources were 44.9% and were higher other previous study in MIA. Though, contribution to metallurgy/soil dust source was 33.4% in RA1S, on the other hand contribution to soil dust was 54% in RA2S, so residential A near MIA was more relatively contributed by industrial source. Consequently, supposition was based upon RA1S near MIA was more influenced by industrial sources emitted by MIA than RA2S was confirmed by result of mean concentration Lead isotope compositions in PM10(Pb206/Pb204, 18.067; Pb207/Pb206, 0.879; Pb208/Pb206, 2.141) are clearly distinct from the tunnel air sample(vehicle exhaust particles). By averaging the lead isotope ratio of PM10 samples from eight sites in Phohang, the typical values for the ratio of Pb206/Pb204, Pb207/Pb206, and Pb208/Pb206 are 17.796, 0.858, and 2.073, it seems that the contribution from tunnel air samples(automotive emission) has slightly decreased since the phase-out of leaded gasoline in 1997. However, considering the limited precision of Pb isotope ratio measurement with higher precision by using instruments, such as multi-collector Inductively coupled plasma mass spectrometry(ICP-MS) or Thermal Ionization Mass Spectrometry (TIMS), in the future studies, in order to verify this interesting observation. The Pb isotope ratios obtained in the source-related samples confirmed that the major emission sources are SST(tunnel air sample), iron dust, and slag.
주제어
#대기오염물질 오염원 Pb isotope ratio 동위원소비 PM10
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