Slight transition in Chinese atmospheric Pb isotopic fingerprinting due to increasing foreign Pb.
Environ Pollut
; 323: 121296, 2023 Apr 15.
Article
de En
| MEDLINE
| ID: mdl-36804888
ABSTRACT
Atmospheric lead (Pb) pollution negatively affects human health and ecosystem, and extensive research is required to identify its sources and develop robust mitigation methods. In this study, the concentration and isotopic composition of Pb in fine particulate matter (PM2.5) at five sites in the China's Beijing-Tianjin-Hebei (BTH) region were analyzed. The results showed that the Pb concentration in the BTH region declined along the northwest direction in winter owing to the East Asian monsoon. Pb isotopic signatures confirmed that anthropogenic activities significantly contributed to Pb pollution, compared with natural sources. With the increasing import of foreign Pb (with a relatively lower 208Pb/206Pb ratio) to China, we hypothesized that the unique isotopic signature of Pb in Chinese aerosols may decline over time. Therefore, the application of the isotopic approach for quantifying Pb transported from China should be carefully appraised in future research to provide a realistic estimate of the contribution of local sources and the transboundary effect consistent with air mass trajectories analysis. This study provides a theoretical reference for supporting the utilization of Δ208Pb values for better clarify the transboundary impact of Pb pollution and to reduce international disputes.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Polluants atmosphériques
/
Pollution de l'air
Limites:
Humans
Pays/Région comme sujet:
Asia
Langue:
En
Journal:
Environ Pollut
Sujet du journal:
SAUDE AMBIENTAL
Année:
2023
Type de document:
Article
Pays d'affiliation:
Chine