M. BOUZIANE Mokhtar

MAA

Directory of teachers

Department

BASE COMMON ST Departement ST

Research Interests

Specialized in BASE COMMON ST Departement ST. Focused on academic and scientific development.

Contact Info

University of M'Sila, Algeria

Email : mokhtar.bouziane@univ-msila.dz

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Recent Publications

2025-03-21

Impact of industrial and traffic changes on atmospheric dust and trace element deposition in Didouche Mourad, Algeria

Given the critical environmental and health implications of atmospheric deposition, this study examined the long-term variations in atmospheric dust and trace element deposition in Didouche Mourad, Algeria, from 21/6/ 2002–20/6/2003 (P1) to 21/12/2017–20/12/2018 (P2), a period marked by significant industrial and infrastructural changes. Using a network of 10 sampling sites, we conducted two-year-long measurement campaigns to quantify the deposition rates of dust and seven trace elements (Pb, Mn, Cr, Ni, Cu, Co, and Cd). We used a combination of techniques, including spatiotemporal analysis and enrichment factor calculations, to understand how local changes affect air quality. The results showed a substantial reduction in the average cross-site deposition rates between the two periods: dust (61 %), Co (98 %), Cd (97 %), Pb (90 %), Mn (76 %), Cu (62 %), Ni (51 %), and Cr (50 %). This improvement was attributed to specific interventions, including new road construction and upgraded industrial filtration systems. Shifts in seasonal deposition patterns were observed, with elevated levels in summer and autumn during 2002–2003, changing to peaks in summer and winter in 2017–2018. Four main pollution sources were identified through PCA for each period: agricultural activity (P1),
Citation

M. BOUZIANE Mokhtar, (2025-03-21), "Impact of industrial and traffic changes on atmospheric dust and trace element deposition in Didouche Mourad, Algeria", [national] Journal of Hazardous Materials , Elsevier

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2022-09-15

Source apportionment of PM2.5 and their associated metallic elements by positive matrix factorization at a traffic site in Constantine, Algeria

Chemical characterization of PM2.5 (major and trace elements) was carried out for a source apportionment study of PM2.5 at a traffic site in Constantine, Algeria, from March 2017 to March 2018. For this purpose, several tools were used of which PMF, CPF, PSCF, Spearman correlation matrix and HYSPLIT back trajectories. The mean annual concentration of PM2.5 at the sampling site was 54.07 ± 28.81 μg/m3. This value is much higher than the annual threshold recommended by the WHO of 10 μg/m3. Based on the PMF modelling, five sources were identified: sea salts (15.1%), industrial activities (18.9%), nonexhaust
emissions (wear of brakes, tires and road surfaces) (24.2%), exhaust emissions (mixed diesel and gasoline engine exhaust) (15.8%) and mineral dust (25.9%) as the main sources of metallic aerosols at the sampling site in Constantine. Our results revealed that anthropogenic activities (traffic and industry) contributed 59% to all emissions, while natural sources (mineral dust and sea salt) accounted for 41%. Traffic-related sources are the major contributor to anthropogenic emissions (40%) with non-exhaust emissions being the dominant source. As anthropogenic emissions are the leading sources, their control is of utmost importance for improving air quality. The concentrations of PM2.5 tend to increase appreciably with temperature and wind speed for a relative humidity less than 60%. The contribution of vehicular emissions is affected by
relative humidity and temperature while industrial emissions are affected mainly by wind intensity and direction. Relative humidity, temperature and wind speed are determining parameters of mineral dust. There are seasonal variations in the contributions of the PMF-derived sources. Summer undergoes significant contributions of three factors: sea salts, industrial emissions and mineral dust. Spring is affected mainly by industrial emissions and non-exhaust emissions. Winter experiences a drastic contribution of the exhaust emission factor. Autumn is the least affected season by mineral dust and sea salts. It is rather affected by ndustrial and traffic emissions.
Citation

M. BOUZIANE Mokhtar, Naidja Lamri, Ali-Khodja Hocine, Khardi Salah, Terrouche Ahmed, Lokorai Kenza, Charron Aurélie, , (2022-09-15), "Source apportionment of PM2.5 and their associated metallic elements by positive matrix factorization at a traffic site in Constantine, Algeria", [national] Air Quality, Atmosphere & Health , Springer

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2021-02-02

Influence of mineral dust on the concentration and composition of PM10 in the city of Constantine

identify Saharan dust intrusions and evaluate their contribution to annual and daily PM10 at an urban background site located in the city of Constantine in Algeria. A reliable identification of SD days was carried out using aerosol maps provided by BSC-DREAM model and the information provided by HYSPLIT air mass back trajectories. SD is mainly composed of mineral dust (MD) due to the proximity of the Sahara to the study site. MD was determined by chemical speciation analysis and was estimated on SD days and non SD days. The contribution of MD on SD days was about 50% higher than that observed on non SD days. The observed average PM10 concentration during the study period was 56 ± 32.0 μg/m3. During SD days, the average PM10 concentration was 70 ± 36.1 μg/m3. On average, the PM10 concentration increased by 17.05 ± 12.7 μg/m3 on SD days. SD events contributed between 0.6 and 41.5 μg/m3 to the daily PM10 concentrations, whereas the average contribution to the annual PM10 concentration was 7.2 ± 11.8 μg/m3 i.e., 12.8 ± 15.5%. After the extraction of the SD load, the annual WHO air quality guideline (AQG) was still exceeded. SD incursions led to an increase of most metal elements concentrations by a factor ranging from 1.05 to 3.33. Our results point out that SD outbreaks are quite frequent as they occurred 42.2% of the annual days.
Citation

M. BOUZIANE Mokhtar, Lokorai Kenza, Ali-Khodja Hocine, Khardi Salah, Naidja Lamri, , (2021-02-02), "Influence of mineral dust on the concentration and composition of PM10 in the city of Constantine", [national] Aeolian Research , Elsevier B.V.

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