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Hicham El Bakouri Jos Morillo Jos Usero Abdelhamid Ouassini 《Journal of Hydrology》2008,353(3-4):335-342
The heavy use of pesticides in agriculture has meant that the fate due to their movement after their application continue to be a real problem for the environment. In this work, a viable eco-remediation technique based on the use of natural organic substances (NOS) that characterize the Mediterranean region is proposed to demonstrate the efficiency of endosulfan sulphate removal from water. Experimental results showed that the pH of pesticide solutions and temperature negatively affect the adsorption process. According to adsorption kinetic data, 5 h were considered as the equilibrium time for realizing adsorption isotherm. The Freundlich isotherm model describes better the adsorption process of endosulfan sulphate on NOS tested. The Freundlich constant Kf depended mainly on the nature of each adsorbent and ranged from 5.56 for straw to 13.54 for date stones. The adsorption tests gave very satisfying results and point to the possible application of these supports as an ecological remediation technique to reduce pesticide contamination of aquatic ecosystems. 相似文献
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Abdennour Mohamed Amine Douaoui Abdelkader Barrena Jesús Pulido Manuel Bradaï Abdelhamid Bennacer Amel Piccini Chiara Alfonso-Torreño Alberto 《中国地球化学学报》2021,40(2):234-250
Acta Geochimica - The agriculture in Biskra, southeastern Algeria, is based on traditional practices and characterized by small irrigated fields. In the last decades, the increasing demand in water... 相似文献
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Imen Hamdi-Nasr Mohamed Hédi Inoubli Abdelhamid Ben Salem Saïd Tlig Abdelbaki Mansouri 《Geophysical Prospecting》2009,57(4):719-728
Detailed gravity measurements integrated with geological data were computed to constrain the mechanisms that were active during the emplacement of the Triassic evaporite-bearing folds of Jebel Cheid from the salt-dome zone in the Atlassic region. The gravity analysis consists in mapping the contrasting gravity responses: complete Bouguer anomaly, residual anomaly and derivative maps; the main results display a positive amplitude gravity anomaly as the response of Triassic evaporite bodies and important NE–SW-trending features at the boundaries between the Triassic outcrops and their enveloping strata. In contrast with gravity calculations of a salt dome structure usually resulting in negative gravity anomaly models, the Jebel Cheid clearly expresses a positive gravity anomaly; furthermore, this result is supported by synthetic gravity interpretation. 相似文献
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H. A. Attar D. Blavet E. M. Selim M. T. Abdelhamid J. J. Drevon 《International Journal of Environmental Science and Technology》2012,9(1):1-13
The current study aims to examine, the response of contrasted recombinant inbred lines of common bean to the application of phosphorus, to identify the bean recombinant inbred lines which were efficient in phosphorus utilization when dependent on nitrogen fixation as a source of nitrogen. The experiment was conducted at the experimental farm of Agricultural Research Station of the Nubaria district, Behera, Egypt, during the winter seasons of 2008?C2009. Three levels of mineral phosphorus fertilizers were applied (0, 45 and 90?kg?ha?1 phosphorus pentoxide). Nodulation, plant growth parameters, leaf area, soil Olsen phosphorus, pH, and phosphorus and nitrogen of shoots, nodules and seeds were measured. The results have shown that the recombinant inbred lines responded positively to P application levels. The best values were observed in recombinant inbred lines 75, 83 and 34. Vegetative growth parameters were significantly enhanced by increasing levels of phosphorus. The highest level of phosphorus, i.e., 90?kg?ha?1 phosphorus pentoxide gave the optimal values of growth parameters for all common bean recombinant inbred lines while control plants obtained the lowest values. An increase of Olsen-P and a decrease of soil pH were also observed with increases in phosphorus. These results led to the conclusions that phosphorus applied to Nubaria soil: (1) improved the soil fertility; (2) enhanced the ability of root nodules of common bean recombinant inbred lines to fix atmospheric nitrogen; and (3) increased the release of hydrogen by roots, thus decreasing soil pH and reducing the immobilization of phosphorus in the soil solution and transforming it into available form for the plant. 相似文献
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Fatima Zohra Bouchareb-Haouchine Abderrahmane Boudoukha Abdelhamid Haouchine 《水文科学杂志》2013,58(6):1184-1195
Résumé Afin d'identifier le système hydrothermal de la région de Hammam Righa (Algérie), une étude hydrogéochimique et géothermométrique a été effectuée. Un tableau détaillé de l'hydrogéochimie des eaux a été dressé à partir des analyses en éléments majeurs. Deux faciès hydrogéologiques ont été ainsi identifiés: HCO3-Ca et SO4-Ca. Ceci est contrôlé par, respectivement, les interactions avec les calcaires jurassiques conduisant à la dissolution des carbonates et la présence d'évaporites (Trias) le long du circuit de remontée des eaux. Les eaux émergent à travers un système de fractures profondes et récentes. Les températures des sources varient de 26 à 68°C, caractérisant ainsi un thermalisme de basse enthalpie. L'application de différents géothermomètres donne des températures allant de 70 à 110°C pour le réservoir thermal. L'analyse de ces résultats, confrontée au gradient géothermique de la région, permet l'identification des calcaires jurassiques comme réservoir thermal où les eaux ont circulé à des profondeurs de plus de 1800 m. Editeur Z.W. Kundzewicz Citation Bouchareb-Haouchine, F.Z., Boudoukha, A., et Haouchine, A., 2012. Hydrogéochimie et geothermometrie: apports à l'identification du réservoir thermal des sources de Hammam Righa, Algérie. Hydrological Sciences Journal, 57 (6), 1184–1195. 相似文献
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Mohamed I. Matsah Haitham M. Baggazi Abdelhamid El Fakharani Mohamed K. El-Shafei 《Arabian Journal of Geosciences》2018,11(22):727
Utilization of satellite images and field observations of dike swarms in pre-Fatima basement show that these dikes are older than the overlaying Fatima Formation. Dikes digitization and orientation analysis on satellite images show that the prevailing trend of the dikes is ENE-WSW. The granitic rocks of pre-Fatima basement and its hosted dikes expose evidences of completely a different deformation regime from the overlaying Fatima Formation. These evidences include shearing, dextral shear indicators, isoclinal folds, deflection and rotation of crystals, mineral elongation, and mylonitic and gneissose textures. Strain analysis results of using Fry method on quartz and feldspar grains support the presence of deformation in these ENE-WSW dikes. These results gave a strain ratio of 2.1:1.3:1, which suggest an amount of 40% stretching in the ENE-WSW direction parallel to the dike walls, and an amount of 30% shortening in the NNW-SSE direction. Mesoscopic and microscopic scale structures confirm the existence of dextral ductile-brittle shearing followed the emplacement of the dikes and before the pure shear deformation that caused the thrusting and folding of Fatima Formation. This ductile-brittle deformation is correlated with the dextral transpression that formed the Fatima Shear Zone (FSZ). 相似文献
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Belkacem Marir Mahdi Kalla Fouzi Douak Abdelhamid Daamouche 《Journal of the Indian Society of Remote Sensing》2018,46(4):515-529
In this work, we present a new strategy of active learning, based on a modular version of support vector machine (MSVM) applied to urban remote sensing images in Algeria. In general, the training set is highly imbalanced, which gives more complex models; this difficulty is solved by dividing the problem at hand into a set of sub-problems, where each sub-model could be simpler to solve. The support vector machine is introduced to solve the problem of classification based on image remote sensing data related to atmospheric conditions and illumination reflectance. The aim of the proposed method is to improve the accuracy in order to understand the correlated elements of urban structures (the site, the built, the parcels, the network, the space), to generate the final classification result. In particular, we propose a new method based on the modular support vector machine (MSVM) adopted to active learning method, using three different clustering methods (i) k-means, (ii) fuzzy c-means (FCM), and (iii) Gustafson–Kessel (GKclust). Experimental results obtained on two QuickBird multispectral images of Sétif and Batna cities in the eastern of Algeria confirm the capabilities of the proposed methods based on the ensemble of model trained with different task decomposition compared to a traditional model using active learning. This method improves each class presents a main register in urban structure tissues. 相似文献
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GeoJournal - Assessing land use/cover (LULC) change in coastal lakes is an essential process for sustainable development. Edku Lake is one of the most important lakes in the northern part of Nile... 相似文献