Assessment of annual air pollution levels with PM1, PM2.5, PM10 and associated heavy metals in Algiers, Algeria
Assessment of annual air pollution levels with PM1, PM2.5, PM10 and associated heavy metals in Algiers, Algeria
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DOI：
10.1016/j.envpol.2017.09.041
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发表时间：
2018-01-01
影响因子：
8.9
通讯作者：
Boughedaoui, Menouer
中科院分区：
文献类型：
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作者：
Talbi, Abdelhamid;Kerchich, Yacine;Boughedaoui, Menouer
在阿尔及尔（阿尔及利亚）的城市和路边两个不同站点调查了小于1 μ m、2.5 μ m、10 μ m的颗粒物浓度及其重金属含量。在两年期间进行采样的高容量采样器（HVS）配备了级联冲击器在四个级别的阶段，为期一年的采样。通过X射线荧光分析（XRF）对颗粒物（PM）中的重金属进行了表征。两站PM 1、PM2.5和PK10的年均浓度分别为18.24、32.23和60.01 μ g m（-3）。路边PM 1、PM2.5和PK10的浓度范围分别为13.46 ~ 25.59 μ g m（-3）、20.82-49.85 μ g m（-3）和45.90-77.23 μ g m（-3）。而市区PM 1、PM2.5和PM10的浓度变化范围分别为10.45 ~ 26.24 μ g m（-3）、18.53-47.58 μ g m（-3）和43.8 ~ 9162 μ g m（-3）。通过扫描电子显微镜-能量色散X射线分析（SEM-EDX）证实了与PM相关的重金属。通过SEM-EDX分析PM2.5的不同点显示存在19种人为和自然来源的元素，在检测到的重金属中，发现铅最大为5%（重量百分比）。为了确定两个采样点的PM水平的源贡献，主成分分析（PCA）被应用到所收集的数据。统计分析确认人为排放源，交通是一个重要的排放源，自然排放量也占很大比例。在这两个地点，PM2.5/PK10的比例低于发达国家通常记录的水平。从撒哈拉开始的空气质量的反向轨迹的研究表明，沙漠灰尘影响的浓度和PM的成分在阿尔及尔测量。(C)2017爱思唯尔有限公司版权所有。
Concentrations of particulate matter less than 1 mu m, 2.5 mu m, 10 mu m and their contents of heavy metals were investigated in two different stations, urban and roadside at Algiers (Algeria). Sampling was conducted during two years by a high volume samplers (HVS) equipped with a cascade impactor at four levels stage, for one year sampling. The characterization of the heavy metals associated to the particulate matter (PM) was carried out by X-Ray Fluorescence analysis (XRF). The annual average concentration of PM1, PM2.5 and PK10 in both stations were 18.24, 32.23 and 60.01 mu g m(-3) respectively. The PM1, PM2.5 and PK10 concentrations in roadside varied from 13.46 to 25.59 mu g m(-3), 20.82-49.85 mu g m(-3) and 45.90-77.23 mu g m(-3) respectively. However in the urban station, the PM1, PM2.5 and PM10 concentrations varied from 10.45 to 26.24 mu g m(-3), 18.53-47.58 mu g m(-3) and 43.8-9162 mu g m(-3). The heavy metals associated to the PM were confirmed by Scanning Electron Microscopy-Energy Dispersive X-Ray analyses (SEM-EDX). The different spots of PM2.5 analysis by SEM-EDX shows the presence of nineteen elements with anthropogenic and natural origins, within the heavy metal detected, the lead was found with maximum of 5% (weight percent). In order to determine the source contributions of PM levels at the two sampling sites sampling, principal compound analysis (PCA) was applied to the collected data. Statistical analysis confirmed anthropogenic source with traffic being a significant source and high contribution of natural emissions. At both sites, the PM2.5/PK10 ratio is lower than that usually recorded in developed countries. The study of the back-trajectories of the air masses starting from Sahara shows that desert dust influences the concentration and the composition of the PM measured in Algiers. (C) 2017 Elsevier Ltd. All rights reserved.