Impact of vehicular movement on road dust resuspension and spatiotemporal distribution of particulate matter during construction activities
Impact of vehicular movement on road dust resuspension and spatiotemporal distribution of particulate matter during construction activities
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DOI：
10.1016/j.apr.2021.101256
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发表时间：
2021-11
影响因子：
4.5
通讯作者：
V. Dheeraj Alshetty;S. Nagendra
中科院分区：
文献类型：
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作者：
V. Dheeraj Alshetty;S. Nagendra
本文介绍了大气颗粒物（PM），可再悬浮的道路灰尘和PM的质量沉积在人体呼吸道中的施工前和施工阶段的特点。对施工道路和非施工道路两个阶段由于再悬浮引起的PM排放率及其时空分布进行了估算和比较。施工阶段监测结果表明，与NCR（SL = 3.0-12.5 g/m2，PM10 ER = 0.3-7.5 g/VKT，PM2.5ER = 0.1-1.8 g/VKT）相比，CR（SL = 26-47 g/m2，PM10 ER = 18.1-43.8 g/VKT，PM2.5ER= 4.3-10.6 g/VKT）的泥沙负荷（SL）和PMER显著较高。施工前阶段的结果显示，值小15至20倍。研究结果表明，施工道路上的PM10、PM2.5和PM 1浓度在夜间最高，分别为270.1、71.8和56.3 μg/m3。在建筑工地两侧0至100米长的道路上，平均PM10浓度大于250微克/立方米。同样，对于100 - 200 m、200-400 m和400-500 m之间的距离，PM10值分别在200 - 250 μg/m3、150-200 μg/m3和100-150 μg/m3之间。目前的研究结果清楚地表明，由于重型卡车的运动道路灰尘的再悬浮高度影响PM浓度在周围环境中的建筑工地。MPPD模型结果表明，施工期施工人员呼吸道中PM10的总沉降率为74- 78%，其次为PM2. 5（23-54%）和PM 1（20-25%）。在地方一级整合可持续做法、使用污染控制技术和执行政策是减少建筑活动污染的前进方向。
This paper presents the characteristics of ambient particulate matter (PM), resuspendable road dust and PM mass deposition in the human respiratory tract during preconstruction and construction phases. PM Emission Rates (PMER) due to resuspension and spatiotemporal distribution were estimated and compared on construction roads (CR) and non-construction roads (NCR) for both phases. The construction phase monitoring results demonstrated that the silt load (SL) and PMERat CR (SL = 26–47 g/m2, PM10ER= 18.1–43.8 g/VKT, PM2.5ER= 4.3–10.6 g/VKT) were significantly high when compared to NCR (SL = 3.0–12.5 g/m2, PM10ER= 0.3–7.5 g/VKT, PM2.5ER= 0.1–1.8 g/VKT). Preconstruction phase results showed 15 to 20 times lesser values. Spatial and temporal variation studies showed that maximum PM concentrations (PM10= 270.1, PM2.5= 71.8, PM1= 56.3 μg/m3) were found during night at construction roads due to the movement of heavy-duty vehicles carrying excavated earth overnight. Between 0 and 100 m length of road on either side of the construction sites, average PM10concentrations were greater than 250 μg/m3. Similarly, for distance between 100 and 200 m, 200–400 m and 400–500 m, the PM10values ranged between 200 and 250 μg/m3, 150–200 μg/m3and 100–150 μg/m3respectively. The current study results clearly indicated that resuspension of road dust due to movement of heavy duty trucks highly influence the PM concentrations in the surrounding environment of a construction site. The MPPD model results indicated that the total deposition fraction of PM10in construction workers airway during the construction phase was 74–78%, followed by PM2.5(23–54%) and PM1(20–25%). Integration of sustainable practices, use of pollution control technologies and implementation of policies at a local scale are the way forward to mitigate the pollution from construction activities.