Source Analysis and Human Health Risk Assessment Based on Entropy Weight Method Modification of PM2.5 Heavy Metal in an Industrial Area in the Northeast of China

In this study, PM2.5 was analyzed for heavy metals at two sites in industrial northeast China to determine their sources and human health risks during heating non-heating periods. A positive matrix factorization (PMF) model determined sources, US Environmental Protection Agency (USEPA) entropy weight methods were used assess risk. metal concentrations higher the period than period. period, coal combustion (59.64%) primary source Huagong Hospitals, contribution rates of emissions traffic 21.06% 19.30%, respectively. Industrial (42.14%) Xinqu Park, 34.03% 23.83%, During (45.29%) 45.29% 44.59%, respectively, Hospital, 10.12%. (43.64%) where 25.35% 31.00%, Park had noncarcinogenic carcinogenic risks, hazard index children (5.74) that adult males (5.28) females (4.49). However, highest lifetime risk (1.38 × 10−3 1.17 10−3) (3.00 10−4). The traditional USEPA both produced reasonable results. when there is a difference between methods, method recommended risks.