Pollution Characteristics and Health Risk Assessment of Heavy Metals in PM 2.5 of Different Air Masses During Heating Season in Tianjin

• Published in: Huanjing kexue Vol. 44; no. 1; p. 30
• Main Authors: Li, Li-Wei, Deng, Xiao-Wen, Xiao, Zhi-Mei, Yuan, Jie, Yang, Ning, Guo, Xiao-Long, Bai, Yu
• Format: Journal Article
• Language: Chinese
• Published: China 08.01.2023
• Subjects: Cadmium; Carcinogens; Child; China; Environmental Monitoring - methods; Heating; Humans; Metals, Heavy - analysis; Particulate Matter - analysis; Risk Assessment; Seasons; China; health risk; back trajectory; heavy metals; PM2.5; heating season
• ISSN: 0250-3301

In order to explore the pollution characteristics and health risks of heavy metals in PM in Tianjin, heavy metal samples (Pb, Cd, Cr, As, Zn, Mn, Co, Ni, Cu, and V) in PM were analyzed from November 2020 to March 2021 using the Xact-625 heavy metal online analyzer. The spatial and temporal distribution characteristics were analyzed using the HYSPLIT model, and the health risks of heavy metals were analyzed using the US EPA risk assessment model. The results indicated that the average total concentration of the 10 heavy metal elements was (261.56±241.74) ng·m , among which the concentrations of Cr ［converted Cr(Ⅵ)］ and As were higher than the annual average limit of the National Ambient Air Quality Standard (GB 3095-2012). According to the back trajectory results, the medium-distance transmissions from northwest areas (NO.1), the long-distance transmissions from northwest areas (NO.2), the transmissions from southwest areas (NO.3), and the transmissions from northeast areas (NO.4) were the major sources in Tia