乌鲁木齐市采暖期大气PM10及PM2.5中Cd的形态分析

摘要

2009年12月14日-28日采集了新疆农业大学校园PM10和PM2.5样品,分析了重金属Cd的形态和风险指数.该采样点在冬季采暖期间PM10及PM2.5污染非常严重,PM10和PM2.5中Cd的含量分别为3.642和1.964 ng·m-3,均以残渣态为主,但PM2.5中Cd的生物有效性高于PM10中Cd的生物有效性.PM10中Cd的致癌风险为6.56×10-6,而PM2.5中Cd的致癌风险为3.46×10-6,均处于可接受的风险水平.%PM2.5 and PM10 samples were collected on campus of Xinjiang Agricultural University during Dec. 14-28, 2009, and the speciation of Cd in PM10 and PM2.5s and its health risk index was analyzed. The results showed that the pollution caused by PM10 and PM2.5 was severe here during the heating period; Cd in PM10 and PM2.5 was of concentration 3. 642 and 1. 964 ng ? M-3 respectively, mainly in the form of residue; however, Cd in PM2.5 had a higher bioavailability than that in PM10. The carcinogenic risk of Cd in PM10 and PM2.5 was 6. 56×10-6 and 3. 46×10-6 respectively, which were both acceptable.