天津市城市建筑工地与工业堆料场扬尘污染研究
发布时间：2018-09-11 14:03
【摘要】：近年来,环境空气质量问题越来越受到人们的关注,空气中悬浮颗粒物严重影响空气的质量,空气中悬浮颗粒物主要来源于城市建筑工地扬尘以及工业堆料场扬尘。扬尘中PM_(10)具有广泛的来源、无组织的排放及难以防治的特点,PM_(10)携带大量的有毒金属离子与感染性病毒,影响着人们的身体健康,PM_(10)的监测与防治尤为重要。本文针对天津市城市建筑工地与堆料场扬尘污染做了研究,主要研究结论如以下三个方面:1、本文对建筑工地的4个建设阶段和3个不同规模堆料场进行了扬尘监测,以重量法分析建筑工地及堆料场扬尘颗粒物的浓度。分析结果中最高和最低PM_(10)浓度为4460.5μg/m3、108.2μg/m3,是国家二级标准(150μg/m3)浓度限值的29.7倍、0.7倍。以电感耦合等离子体-质谱法对扬尘样品,进行19种无机金属及其化合物的定量分析,分析结果中有铬、砷、镉及其化合物超出环境空气标准污染物浓度限值。2、本文利用光散射法对城市建筑工地与堆料场进行全方位的监测,监测数据表明:大部分区域环境空气质量等级为良(AQI100),局部出现轻度污染。利用经验公式对PM_(10)排放因子进行了校正。3、本文按建筑工地及堆料场规模建立符合实际的虚拟坐标,结合区域规模、风速与PM_(10)排放强度条件,纳入FDM模型进行模拟。模拟结果表明:影响建筑工地与堆料场PM_(10)排放因素的顺序依次为排放强度、风速、区域规模,排放强度越大、风速越强、规模越小,则PM_(10)扩散速率越大。
[Abstract]:In recent years, people pay more and more attention to the problem of ambient air quality. Suspended particulates in the air seriously affect the air quality. The suspended particulates in the air mainly come from dust from urban construction sites and industrial stacks. PM_ _ (10) in dust has a wide range of sources. The characteristics of unorganized discharge and difficult to prevent and cure are that PM10 carries a large number of toxic metal ions and infectious viruses. It is particularly important to monitor and control PM10 which affects people's health. In this paper, the dust pollution of urban construction sites and stacks in Tianjin is studied. The main conclusions are as follows: 1. The dust-raising monitoring is carried out on four construction stages and three different scale stacks in the construction site. The concentration of dust particles in construction sites and stacks was analyzed by gravimetric method. The highest and lowest PM_ _ (10) concentrations were 4460.5 渭 g/m3108.2 渭 g / m ~ (3), which was 29.7 times higher than that of the national second class standard (150 渭 g/m3). Inductively coupled plasma-mass spectrometry (ICP-MS) was used to analyze 19 inorganic metals and their compounds. Cadmium and its compounds exceed the concentration limit of ambient air pollutants. In this paper, the light scattering method is used to monitor urban construction sites and stacks. The monitoring data showed that the ambient air quality in most areas was good (AQI100), and the local air quality was slightly polluted. The emendation factor of PM_ (10) is corrected by empirical formula. According to the scale of construction site and stack yard, the virtual coordinate is set up according to the scale of construction site and stack yard. Combining with the regional scale, the condition of wind speed and PM_ (10) emission intensity, the simulation is carried out with FDM model. The simulation results show that the order of PM_ (10) emission factors in construction site and stack yard is emission intensity, wind speed, regional scale, the larger the emission intensity, the stronger the wind speed and the smaller the scale, the greater the diffusion rate of PM_ (10) is.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X799.1
本文编号：2236894
[Abstract]:In recent years, people pay more and more attention to the problem of ambient air quality. Suspended particulates in the air seriously affect the air quality. The suspended particulates in the air mainly come from dust from urban construction sites and industrial stacks. PM_ _ (10) in dust has a wide range of sources. The characteristics of unorganized discharge and difficult to prevent and cure are that PM10 carries a large number of toxic metal ions and infectious viruses. It is particularly important to monitor and control PM10 which affects people's health. In this paper, the dust pollution of urban construction sites and stacks in Tianjin is studied. The main conclusions are as follows: 1. The dust-raising monitoring is carried out on four construction stages and three different scale stacks in the construction site. The concentration of dust particles in construction sites and stacks was analyzed by gravimetric method. The highest and lowest PM_ _ (10) concentrations were 4460.5 渭 g/m3108.2 渭 g / m ~ (3), which was 29.7 times higher than that of the national second class standard (150 渭 g/m3). Inductively coupled plasma-mass spectrometry (ICP-MS) was used to analyze 19 inorganic metals and their compounds. Cadmium and its compounds exceed the concentration limit of ambient air pollutants. In this paper, the light scattering method is used to monitor urban construction sites and stacks. The monitoring data showed that the ambient air quality in most areas was good (AQI100), and the local air quality was slightly polluted. The emendation factor of PM_ (10) is corrected by empirical formula. According to the scale of construction site and stack yard, the virtual coordinate is set up according to the scale of construction site and stack yard. Combining with the regional scale, the condition of wind speed and PM_ (10) emission intensity, the simulation is carried out with FDM model. The simulation results show that the order of PM_ (10) emission factors in construction site and stack yard is emission intensity, wind speed, regional scale, the larger the emission intensity, the stronger the wind speed and the smaller the scale, the greater the diffusion rate of PM_ (10) is.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X799.1
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