Ali-Khodja H, Belaala A, Demmane-Debbih W, Habbas B, Boumagoura N
Département des Sciences de la Nature et de la Vie, Faculté des Sciences, Université Mentouri, Constantine, 25017, Algeria.
Environ Monit Assess. 2008 Mar;138(1-3):219-31. doi: 10.1007/s10661-007-9792-1. Epub 2007 Jun 12.
Total suspended particulate matter and deposition fluxes of particles were investigated in the town of Didouche Mourad which is located 13 km north of Constantine. Samples of air particulate matter were collected at one site located in the heart of the town and situated 3 km north of a cement plant. Samples were collected from 2 November 2002 to 28 April 2003 every 3 days using a high volume air sampler. Sampling intervals were 24 h in all cases. During the same period, samples of dust fallout were collected at the same site. Samples were collected at 30-day intervals. Lead, chromium, manganese, nickel, copper, cobalt and cadmium deposition fluxes were measured and both the soluble and insoluble fractions were determined. Furthermore, the information gathered by this study was correlated with the corresponding hourly weather data provided by a weather station installed at the study station. The possible sources for dust and trace metals were analyzed by comparing average contributions of wind aspects to the concentrations and depositions of mass and chemical species with the average frequencies of wind direction. The mean concentration was 300 microg/m3. The average dust deposition rate through the period of study was 221 mg/(m2.day). Results indicate that anthropogenic sources contribute greatly to trace elements. An exposure assessment to the heavy metals taking into account the inhalation route and soil dust ingestion was carried out and allowed direct comparison of trace metal intakes via these routes.
在君士坦丁以北13公里处的迪杜什·穆拉德镇，对总悬浮颗粒物和颗粒物的沉降通量进行了调查。空气颗粒物样本在位于该镇中心且距一家水泥厂以北3公里处的一个地点采集。使用大容量空气采样器于2002年11月2日至2003年4月28日每3天采集一次样本。所有情况下采样间隔均为24小时。在同一时期，在同一地点采集降尘样本。每隔30天采集一次样本。测量了铅、铬、锰、镍、铜、钴和镉的沉降通量，并测定了可溶和不可溶部分。此外，本研究收集的信息与安装在研究站点的气象站提供的相应每小时气象数据相关联。通过比较风向对质量和化学物种浓度及沉降的平均贡献与平均风向频率，分析了灰尘和痕量金属的可能来源。平均浓度为300微克/立方米。整个研究期间的平均降尘速率为221毫克/(平方米·天)。结果表明，人为源对微量元素的贡献很大。进行了考虑吸入途径和土壤灰尘摄入的重金属暴露评估，从而能够直接比较通过这些途径摄入的痕量金属。
