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Benhaddya M.L.,Oran University of Science and Technology - Mohamed Boudiaf | Benhaddya M.L.,Scientific And Technical Research Center For Arid Areas Crstra | Hadjel M.,Oran University of Science and Technology - Mohamed Boudiaf
Environmental Earth Sciences | Year: 2014

An increase in heavy metal pollution in the soils of Hassi Messaoud (Algeria) due to intense industrialization and urbanization has become a serious environmental problem. There are three large industrial complexes that have been established in the region of Hassi Messaoud for petroleum extraction field and refinery. The region hosts several industrial facilities which are the main sources for hazardous wastes. Surface soil samples from 58 sampling sites (systematically sampled; 1 × 1 km regular grid), including different functional areas in Hassi Messaoud, were collected and analyzed. The results showed that the average concentrations of Cu, Ni, Mn, Pb and Zn in soil of Hassi Messaoud were up to 13.17, 35.78, 121.21, 130.97 and 61.08 mg/kg, respectively. Ni concentrations were comparable to background values, while Cu, Mn, Pb and Zn concentrations were higher than their corresponding background values. Among the functional areas, the industrial regions displayed the highest metal concentrations, while the lowest concentrations occurred in rural soil. Principal component analysis coupled with cluster analysis showed that: (1) Pb and Zn had anthropogenic sources; and (2) Ni, Cu and Mn were associated with parent materials. Contaminations in soils were classified as geoaccumulation index and enrichment factor. Pollution index values of Cu, Ni, Mn, Pb and Zn varied in the range of 0.04-5.41, 0.46-2.49, 0.01-5.73, 0.62-152.9 and 0.09-53.01, with mean values of 1.32, 1.08, 1.26, 5.64 and 3.1, respectively. The integrated pollution index (IPI) of all the analyzed samples varied from 0.42 to 31.59, with a mean of 2.48, and more than 5.45 % of samples are extremely contaminated; 18.18 % are heavily contaminated; 60 % are moderately contaminated; and others are low contaminated. The spatial distribution of IPI showed that desert and rural areas displayed relatively lower heavy metal contamination in comparison with other areas. © 2013 Springer-Verlag Berlin Heidelberg. Source

Benhaddya M.L.,Scientific And Technical Research Center For Arid Areas Crstra | Benhaddya M.L.,Oran University of Science and Technology - Mohamed Boudiaf | Boukhelkhal A.,Scientific And Technical Research Center For Arid Areas Crstra | Halis Y.,Scientific And Technical Research Center For Arid Areas Crstra | Hadjel M.,Oran University of Science and Technology - Mohamed Boudiaf
Archives of Environmental Contamination and Toxicology | Year: 2016

Hassi Messaoud town is a recent city that is situated inside the oil field, which hosts an important petroleum extraction field and refinery. Large-scale and long-term oil refinery and corresponding industrial activities may contaminate the surrounding soil/dust and could lead to pollution levels that can affect human health. The soil and road dust samples were analysed for different trace elements: copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn). Geo-accumulation index (I geo), pollution index (PI), and integrated pollution index (IPI) were calculated to evaluate the heavy metal contamination level of urban soil and road dust. The I geo values indicate unpolluted to moderate polluted of investigated metals in the soil samples. The assessment results of PI support the results of I geo, and IPI indicates heavy metals in road dust polluted seriously. The noncarcinogenic health risk assessment shows that ingestion of soil/dust particles is the route for exposure to heavy metals, followed by dermal adsorption. The human exposure risk assessment based on different exposure pathways showed that the hazard index (HI) was <1.0 for all of the elements. The relative exposure risk (noncarcinogenic) was greater for toddlers. Although the overall risk was within the acceptable limit of 1.00, the HI of Pb from the soil (0.103) and road dust (0.132) was close to the threshold limits, which over the long-term may pose a health risk. © 2015 Springer Science+Business Media New York. Source

Boukhalfa-Deraoui N.,University of Ouargla | Boukhalfa-Deraoui N.,Algeria National School of Agronomy | Hanifi-Mekliche L.,Algeria National School of Agronomy | Mihoub A.,Scientific And Technical Research Center For Arid Areas Crstra | Mihoub A.,University of Ouargla
Asian Journal of Agricultural Research | Year: 2015

Fertilization practices can contribute to modify the properties of the soils, in particular salinity and the pH of soils. The main goal of this study is to demonstrate the impact of the physicochemical properties changes related to applied phosphorus fertilizers on phosphorus availability in light textured soils having low calcareous content. A short-term incubation experiment during 105 days was carried out in field conditions. Three different phosphorus fertilizers (monoammonium phosphate, fosfactyl and single super phosphate) were added in a sandy soil. The principal results indicated that the application of these fertilizers causes an enhancement in phosphorus availability in this soil. Through incubation period, the contribution of phosphorus showed a tendency to increase in the electrical conductivity value of the soil. The SSP fertilizer shows a highest degree of soil salinization with 7.57% compared to the control without phosphorus addition. On the other side the P fertilizers tested exert an acidifying effect, the addition of monoammonium phosphate causes a decrease in pH values of soil in the range of 6.71% compared to untreated samples. Therefore, the pH values of the control reflect the degree of acidification of phosphorus fertilizers used which constitutes an advantage in our Saharan climatic conditions. This study demonstrates that it is essential to choose appropriate fertilizers according to the components of the soils in order to have a suitably reasoned mineral fertilization and respectful of the physicochemical environment of soil and undergrounds waters properties. © 2015 Knowledgia Review, Malaysia. Source

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