Character, Level And Regulatory Measures Study Of Fugitive Dust Emissions From Building Construction Sites In PRD

In recent years, with Chinese industrial development and urbanization processaccelerated, atmospheric particulate pollution has become one of the most prominentproblems in city air quality. Atmospheric particulate matter not only serious impact onhuman health, but also influence the quality of atmospheric environment. Along withthe advancement of urbanization in the Pearl River Delta(PRD) region, infrastructureconstructing such as real estate and public facilities is accelerating. Buildingconstruction dust has become an important source of particular air pollution in thePearl River Delta(PRD) region. However, building construction dust emissioncharacteristics of related research was relatively rare in the Pearl River Delta(PRD)region. Especially, local emission factor research was very scarce. It was difficult toknow building construction dust pollution status and control in this situation.Therefore, we had a in-depth study in building construction dust pollution of the PearlRiver Delta (PRD). In order to provide basic data and scientific basis for the districtadministrative department of the government to make building construction dustpollution control countermeasures and improve the regional air quality.Firstly, in this paper, we have studied in the different construction stages dustemissions in the Pearl River Delta (PRD) with in-situ test research. We establishingconstruction dust emission factor of different stages in the Pearl River Delta (PRD).The result shows that the dust(PM10) emission factor of earthwork excavation,foundation construction, earthwork backfilling and general construction are0.41g/(h·m2)、0.14g/(h·m2)、0.12g/(h·m2) and0.11g/(h·m2).Secondly, Based on the discharge factor method,2012-based constructionbuilding dust emission inventory of PRD was developed. The result show that theemission inventories of PM10was35.24kt. The largest emissions stage wasearthwork excavation, the second and third stages were the foundation constructionand general construction stage, minimum stage was earthwork backfilling.Thirdly, the time and space distribution characteristics of construction dustemissions in the Pearl River Delta (PRD) region were analyzed. The results show that the largest building construction dust emissions were found in January, November andDecember. In May, June, July and August, the emissions were fewer. And, theconstruction dust emissions were mainly concentrated in Guangzhou and Shenzhen,followed by Foshan and Dongguan, the emissions of Jiangmen and Zhaoqing wereleast.Fourthly, the construction dust samples collected from different stages wereanalysized by ICP-MS, Ion Chromatograph and Organic carbon/carbon elementanalyzer. The results show that Al、K、Fe、Mg、Na and Zn are the main element of theconstruction dust samples in the Pearl River Delta (PRD) region. The content of Alelement is highs. Earthwork excavation, foundation construction, earthworkbackfilling and general construction stage were4.59%±1.44%,3.26%±1.05%,3.53%±3.44%, and5.52%±1.72%. K is followed, Content of the V、Cr、As aresmallest. And Content of the SO42-、NO3-and NH4+are also high. Construction sitemechanical vehicle emissions exhaust particulate matter is an important source of theconstruction dust in Pearl River delta(PRD) region. Soil dust source proportion ofconstruction dust in the Pearl River Delta (PRD) region is less than it fromconstruction dust in northern city.Finally, in this paper, the typical construction dust control measures in the PearlRiver Delta (PRD) region have been studied. The results show that water spraying caneffectively reduce the construction site dust emissions, the average efficiency up to45.30%, the dust control efficiency of materials covered is close to100%. Hence,water and materials cover measures can effectively reduce dust pollution.