Lee, Pyeong-Koo Yu, Soonyoung Chang, Hye Jung Cho, Hye Young Kang, Min-Ju Chae, Byung-Gon 2024-01-20T03:03:25Z 2024-01-20T03:03:25Z 2021-09-05 2016-10-25 2045-2322 https://pubs.kist.re.kr/handle/201004/123545 Spherical black carbon aggregates were frequently observed in dust dry deposition in Daejeon, Korea. They were tens of micrometers in diameter and presented a mixture of black carbon and several mineral phases. Transmission electron microscopy (TEM) observations with energy-dispersive X-ray spectroscopy (EDS) and selected area diffraction pattern (SADP) analyses confirmed that the aggregates were compact and included significant amounts of lead chromate (PbCrO4). The compositions and morphologies of the nanosized lead chromate particles suggest that they probably originated from traffic paint used in roads and were combined as discrete minerals with black carbon. Based on Pb isotope analysis and air-mass backward trajectories, the dust in Daejeon received a considerable input of anthropogenic pollutants from heavily industrialized Chinese cities, which implies that long-range transported aerosols containing PbCrO4 were a possible source of the lead and hexavalent chromium levels in East Asia. Lead chromate should be considered to be a source of global atmospheric Pb and Cr(VI) pollution, especially given its toxicity. English NATURE PUBLISHING GROUP AIRBORNE PARTICULATE MATTER LONG-RANGE TRANSPORT NON-ASIAN DUST ISOTOPE RATIOS BLACK CARBON METAL CONCENTRATIONS SOURCE APPORTIONMENT URBAN-ENVIRONMENT HEAVY-METALS PHASE-OUT Lead chromate detected as a source of atmospheric Pb and Cr (VI) pollution Article 10.1038/srep36088 1 SCIENTIFIC REPORTS, v.6 SCIENTIFIC REPORTS 6 scie scopus 000386004800001 2-s2.0-84992431337 Multidisciplinary Sciences Science & Technology - Other Topics Article AIRBORNE PARTICULATE MATTER LONG-RANGE TRANSPORT NON-ASIAN DUST ISOTOPE RATIOS BLACK CARBON METAL CONCENTRATIONS SOURCE APPORTIONMENT URBAN-ENVIRONMENT HEAVY-METALS PHASE-OUT atmospheric pollution EDS heavy metal micro dust PbCrO TEM