丽水市空气中Pb污染调查

为调查丽水市空气中Pb污染现状，在机动车相对集中的市区布设5个测点，测点高度1．2m；监测周期为1a，每星期采样1d或2d，每天采集1个样，每次采样6h；监测项目为TSP、Pb；评价标准采用GB3095—1996《环境空气质量标准》。结果表明，丽水市各测点空气中Pb最大的季均值、年均值均未超标；常规测点和交通路口测点之间TSP、Pb质量浓度值均存在显著的差异性。

Pb Pollution in Ambient Air in Lishui

The Pb pollution in ambient air in Lishui was studied. Five detection sites ware located in urban area which motor vehicle were relative more. The high of detection site was 1.2m, monitoring period was 1 a. Sampling one day or two days in each week, one sample in one day, 6 hours in each sample. Monitoring items were TSP and Pb. Take GB 3095 - 1996 as evaluation standard. The analysis result indicated that the mean concentration of Pb in ambient air were less the limit concentration, both the season' s largest mean concentration and the annual mean concentration. There had obvious difference between the mass concentration of TSP and Pb in traditional detection sites and road s detection sites.