利用快速检测法 (TRAKER) 实时监测石家庄夏季铺装道路机动车道PM2.5、PM10的背景浓度和在机动车行驶过程中车轮扬起的PM2.5、PM10浓度, 分析车速对PM2.5、PM10排放特征的影响, 并得到不同类型道路积尘负荷、排放因子和排放强度.结果表明:车轮扬起的PM2.5浓度随车速变化不大, 而PM10起伏较大;车速相同时, 快速路、主干道、次干道、支路的PM2.5质量浓度分别为0.046、0.110、0.160、0.097mg/m3, 表现为次干道>主干道>支路>快速路, 与积尘负荷的强弱顺序一致;不同类型道路排放因子表现为次干道>快速路>支路>主干道, 排放强度表现为快速路>次干道>主干道>支路.研究结果可为石家庄道路交通扬尘排放清单的构建以及扬尘的治理提供数据支撑和参考.%Samples were collected by using TRAKER system for obtaining paved vehicle lane dust background concentration and the concentration of dust resuspended by a driving automotive vehicle at Shijiazhuang in summer.Then analysis on the impact of vehicle speed on emission characteristics of PM2.5 and PM10 lifted by the wheel and the silt loading, emission factor and emission strength of paved road were obtained.Results showed that PM2.5 lifted by the wheel did not change much with the speed of the vehicle, while the PM10 fluctuated greatly.At the same vehicle speed, the PM2.5 concentration from expressway, main trunk road, secondary trunk road and branch road are 0.046, 0.110, 0.160 and 0.097 mg/m3, respectively, and the sequence was secondary trunk road>main trunk road>branch road>expressway, same as the order of silt loading.The sequence of road dust emission factor was secondary trunk road>expressway>branch road> main trunk road, while the sequence of road dust emission strength was expressway>secondary trunk road>main trunk road>branch road.This study had great significance on region road dust emission inventory construction and provided the basic scientific data support for control measurement decision.
展开▼
