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Intersheet Distance Modeling and Thermal Characterization of New Micro/Nano-Composites Composed by Clay Matrix and PEG 6000 Addition

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Open Journal of Civil Engineering 2016年第4期6卷 577-594页

作者： Iatimad Akhrif mostapha el jai Laila Mesrar Raouf Jabrane Geosciences and Environment Laboratory Faculty of Sciences and Techniques Sidi Mohammed Ben Abdellah University Fez Morocco Advenced Materials & Applications Research Team Ecole Nationale Supérieure d’ Arts & Métiers de Meknès Moulay Ismail University Meknes Morocco

Nowadays, the energetic efficiency becomes one of the major interests of the global society. Thus, the energetic challenges of the new century enforce the scientific and industrial environment to the development of new efficient materials, which present more than the classical thermal properties, according to the energy storage, energy consumption and other specific needs. In this context, the present work constitutes the third step of the development of a new kind of composite materials (micro-composites and nano-composites), using natural marl (clay) clay and biodegradable polymer, which is the PolyEthylene Glycol 6000 (PEG 6000). This step corresponds to characterization of the variation of the specific heat (denoted Cp) of the materials elaborated. So, in order to estimate the capacity of thermal energy adsorption, we utilized a SHIMATZU-DSC 60 Differential Scanning Calorimeter. The main results present the evolution of the Cp according to the PEG 6000 doping and also the specific melting enthalpy of the polymer within the natural clay matrix;by the way this enthalpy constitutes the specific heat stocked in the materials.

关键词： Kaolinite/Illite Micro and Nanocomposite/Clay Matrix Phase Chage Materials PolyEthylene Glycol 6000 Thermal Analysis DRX Characterization Differential Scanning Calorimetery Transformation Enthalpy Latent Heat

Correction of the Production Master Plan According to Preventive Maintenance Constraints and Equipments Degradation State

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Engineering（科研） 2014年第6期6卷 274-291页

作者： mostapha el jai Iatimad Akhrif Brahim Herrou Hussain Benazza Geosciences and Environment Laboratory Faculty of Sciences and Techniques Sidi Mohammed Ben Abdellah University Fez Morocco Industrial Engineering Department Ecole Nationale Supérieure d’Arts et Métiers de Meknès Moulay Ismail University Meknes Morocco Industrial Engineering Department Ecole Nationale Supérieure d’Arts et Métiers de Meknès Moulay Ismail University Meknes Morocco Industrial Techniques Laboratory Faculty of Sciences and Techniques Sidi Mohamed Ben Abdellah University Fez Morocco Industrial Techniques Laboratory Faculty of Sciences and Techniques Sidi Mohamed Ben Abdellah University Fez Morocco

In this paper, we tried to formulate the interdependences of the systematic maintenance policies and the choice of a production master plan. We started from the intuitive relation between the time of production and the degradation state of the equipment to mathematically formulate the problematic and thus to build the objective space function and feasible solution set of this multiobjective problematic. The solutions set could after be presented to the decision maker to choose one, or more of these solutions, in order to manage and control the maintenance and production policies at the same time.

关键词： Production Master Plan Systematic Maintenance MOP (Multiobjective Optimization Problem) Feasible Set Objective Function Space

Physical Characterization and elaboration Discussion of a Clay-PEG 6000 Composite with Natural Clay Matrix

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Engineering（科研） 2014年第7期6卷 338-354页

作者： Iatimad Akhrif mostapha el jai Laila Mesrar Ahmed elkhalfi Abdelhamid Touache Raouf Jabrane Advanced Material and Application Team Ecole Nationale Supérieure d’Arts et Métiers de Meknès Moulay Ismail University Meknes Morocco Geosciences and Environment Laboratory Faculty of Sciences and Techniques Sidi Mohammed Ben Abdellah University Fez Morocco Mechanical Engineering Department Faculty of Sciences and Techniques Sidi Mohammed Ben Abdellah University Fez Morocco

In this paper, we compare different nanoclay-PEG composites and the influence of the input parameters especially the percentage of PEG and the clay size. Because of the facility of material elaboration, dried state with grinding, we adopted a complete experiments plan to obtain a maximum of robustness of the responses. For each sample, we made an XRD analysis to see if we obtain the intercalation of the PEG 6000 (Polyethylene Glycol 6000) within the clay sheets. The characterization adopted consists on the measurement of the shrinking of some cylinders we made, the liquidity and plasticity limits according to the Casagrande protocol used in geotechnical clays characterizations. We utilize also the methylen blue protocol to estimate the variation of the specific surface of ionic exchange of the clay sheets according to the PEG 6000 percentage and the clay sizes. SEM microscopy permits to visualize some of the phases detected by the XRD analysis. The TEM microscopy permits also to see the amorphous phases created by the grinding protocol which affects significantly the specific surface and the shrinking of the new materials. For each section, we made some conclusions with interpretation in order to integrate these results in civil engineering, classical/artisanal material construction and geotechnical fields.

关键词： Clay Structure PEG 6000/Clay Matrix Composite ICP Analysis Atterberg Limits Specific Surface Shrinking Microscopy Characterization

Valorization of a Good Bioceramic from Moroccan Waste Fish Bone by a Heat Treatment Method

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Journal of Renewable Materials 2019年第1期7卷 1-7页

作者： Kaoutar Kara Fatiha Ouanji el mostapha LOTFI Mohammed el Mahi Mohamed Kacimi Laboratory of Spectroscopy Molecular ModelingMaterialsNanomaterialsWater and EnvironmentEnvironmental Materials TeamENSETMohammed V UniversityRabatMorocco Laboratory of Nanomaterial Nanotechnology and EnvironmentPhysico-chemical of Material and Catalysis(URAC26)Faculty of SciencesUniversity of Mohammed VRabat.Morocco

A tricalcium phosphate(TCP)material was produced from sardine and mackerel waste using a heat treatment method after a Soxhlet extraction to obtain the non-soluble portion of fish *** bones were annealed at temperatures between 400℃ and 1200℃.The thermal analysis(TG-DTA)was carried out to investigate the thermal stability of TCP and to confirm the removal of organic matter from the raw *** calcined bones were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and field emission scanning electron microscopy(FESEM).The calcium to phosphorous weight ratio was determined by ***-IR and XRD confirmed the similarities to syntheticβ-TCP(JCPDS-09-169),FE-SEM results revealed the formation of nanostructured *** results suggest that varying the isolation temperature between 600-1200℃ has tremendous impact on the production of TCP from fish bone waste with the required properties.

关键词： Hydroxyapatite tri-calcium phosphate fish bone heat treatement bioceramic

Ferroelectric solid solution Li1-xTa1-xWxO3 as potential photocatalysts in microbial fuel cells:Effect of the W content

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1985-1991页

作者： Abdellah Benzaouak Nour-Eddine Touach V.M.Ortiz-Martinez M.J.Salar-Garcia F.Hernandez-Fernandez A.P.de los Rios Mohammed el Mahi el mostapha Lotfi Laboratory of Mechanics and Industrial Processes Chemical Sciences Research TeamENSETMohammed V University in RabatMorocco Department of Chemical and Environmental Engineering Technical University of CartogenaCampus Muralla Del Mar MurdaSpain

Microbial fuel cells(MFCs)are bio-electrochemical systems that can directly convert the chemical energy contained in an effluent into bioelectricity by the action of *** performance of these devices is heavily impacted by the choice of the material that forms the *** work focuses on the assessment of ferroelectric and photocatalytic materials as a new class of non-precious catalysts for MFC cathode construction.A series of cathodes based on mixed oxide solid solution of LiTaO_3with WO_3formulated as Li_(1-x)Ta_(1-x)W_xO_3(x=0,0.10,0.20 and0.25),were prepared and investigated in *** catalyst phases were synthesized,identified and characterized by DRX,PSD,MET and UV–Vis absorption *** cathodes were tested as photoelectrocatalysts in the presence and in the absence of visible light in devices fed with industrial *** results revealed that the catalytic activity of the cathodes strongly depends on the ratio of substitution of W^(6+)in the LiTaO_*** maximum power densities generated by the MFC working with this series of cathodes increased from60.45 mW·m^(-3)for x=0.00(LiTaO_3)to 107.2 mW·m^(-3)for x=0.10,showing that insertion of W^(6+)in the tantalate matrix can improve the photocatalytic activity of this ***,MFCs operating under optimal conditions were capable of reducing the load of chemical oxygen demand by 79%(COD_(initial)=1030 mg·L^(-1)).

关键词： Ferroelectric materials Tantalate Photocathode Microbial fuel cell Bioenergy Wastewater treatment

Implication of sewage sludge increased application rates on soil fertility and heavy metals contamination risk

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Emerging Contaminants 2023年第1期9卷 41-52页

作者： Abdelmajid Achkir Abdelhakim Aouragh Mohammed el Mahi el mostapha Lotfi Najoua Labjar Mohammed el Bouch Moulay Lahcen Ouahidi Taruvinga Badza Hamid Farhane Tawfik el Moussaoui Laboratory of Spectroscopy Molecular ModellingMaterialsNanomaterialsWater and EnvironmentCERN2DENSAMMohammed V University in Rabat10100Morocco National Laboratory for Studies and Pollution Monitoring-Ministry of Energy Mines and EnvironmentDepartment of EnvironmentRabatMorocco School of Agricultural Earth and Environmental SciencesUniversity of KwaZulu-NatalPrivate Bag X01ScottsvillePietermaritzburg3209South Africa Team of Anthropogenetic Sciences and Biotechnologies Faculty of SciencesChouaib Doukkali UniversityEl Jadida24000Morocco Resources Valorization Environment and Sustainable Development Research Team(RVESD)Department of MinesMines School of RabatAve Hadj Ahmed CherkaouiBP 753AgdalRabat53000Morocco

This paper aims to assess soil fertility and risk contamination parameters in response to increased amendment rates of sewage sludge application,under semi-arid climatic conditions of Morocco,using two soil textures:soil A(clay-silty)and soil B(sandy-clay)over two *** this end,sewage sludge and soils treatments physicochemical parameters,heavy metals content,degree of pollution and associated risks were evaluated and compared to controlled *** results showed that all studied parameters changed significantly(pPb>Zn>Ni>Cd>***,their concentrations were below the critical values established by the European Union for the agronomic use of *** obtained results of assessed parameters indicating SS degree of pollution and associated risks showed a low to a moderate contamination risks of heavy ***,environmental risks of sewage sludge application will be related to increase of heavy metals mainly in a long-term agricultural ***,optimal management of sewage sludge application is recommended to ensure sustainability and benefits at the same time to master the contamination risks.

关键词： Sewage sludge Soil Land application Fertility Heavy metals Risk assessment

Synthesis and <i>in Vitro</i>Cytotoxic Activity of Novel Pyrazole-3,4-dicarboxylates

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International Journal of Organic Chemistry 2013年第1期3卷 37-41页

作者： Hanan Sekkak el mostapha Rakib Medaghri-Alaoui Abdelouahid Abderrafia Hafid Abdelghani el Malki Laboratoire de Chimie Organique et Analytique Faculté des Sciences et Techniques Université Sultan Moulay Slimane Béni-MellalMorocco

N-Aryl-C-ethoxycarbonylnitrile imines (3a-g) react with ethyl cyanoacetate 1 in 1,3-dipolar cycloaddition to yield novel pyrazole-3,4-dicarboxylates (4a-g) in moderate yields. The reaction of pyrazole-3,4-dicarboxylates (4a, d) with hydrazine afforded pyrazolo[4,3-d]pyridazine-4,7-diones (5a, d) in good yields. All compounds were fully characterized by spectroscopic methods. Some of the newly synthesized compounds were evaluated for their cytotoxic activity against murine P815 mastocytoma cell line.

关键词： Nitrile Imines Cycloaddition Pyrazoles Cytotoxic Activity

Moroccan Version of the Mattis Dementia Rating Scale: The Effects of Age, Education, and Gender

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World Journal of Neuroscience 2018年第1期8卷 90-97页

作者： Siham Sanhaji Imane elargoub Chloe Lemaréchal Maria Benabdeljlil mostapha el Alaoui Faris Faculty of Medicine and Pharmacy University Mohammed V Rabat Morocco Department of Neurology and Neuropsychology A Specialty Hospital Rabat Morocco

The present study aims to adapt and to standardize the MDRS in the Moroccan population. The Moroccan Dementia Rating Scale was adapted in Arabic and was administered to 192 younger and older individuals without cognitive deficits (96 men and 96 women) whose ages ranged from 18 to 85 years old. To investigate the impact of age and schooling, participants were classified into three levels of education, and three age categories. The results show that age and level of education strongly influenced the performance of an average of 124/144 of the MDRS subjects who were tested.

关键词： MDRS Morrocan Population Age Education

Study of a Melt Crystallization Process for Seawater Desalination

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Journal of Mechanics Engineering and Automation 2015年第1期5卷 45-52页

作者： Anouar Rich mostapha Siniti Denis Mangin Jean-Paul Klein Youssef Mandri Tijani Bounahmidi Ahmed Bouhaouss Stephane Veesler Mohamed el Ganaoui Equipe de Thermodynamique Surface et Catalyse Faculte des Sciences Universite Chouaib Doukkali El Jadida 24000 Maroc LAGEP (Laboratoire d'Automatique et de Genie des Procedes) Universite Lyon 1 Villeurbanne 69622 France LASPI (Laboratoire d'Analyse et Synthese des Proeedes Industriels) Ecole Mohammadia d'Ingenieurs Universite Mohammed VRabat 10000 Maroc LNGPE (Laboratoire des Nanostructures Genie des Procedes et Environnement) Faculte des Sciences de Rabat Universite Mohammed V Rabat 10000 Maroe CINaM-CNRS (Centre Interdisciplinaire de Nanosciences de Marseille-Centre National de la Recherche Scientifique) Campus de Luminy Marseille 13288 France LERMAB-IUT (Laboratoire d'Etude et de Recherche sur le Mat~riau Bois-Institut Universitaire de Technologie Longwy) Longwy Universite de Lorraine Cosnes et Romain F-54400 France

The work aims to develop a process for freezing desalination of seawater on cold walls. The experiments were performed with water/NaCl solutions of different concentrations and with samples of seawater. The pilot crystallizer consists of a cooled tube immersed in a cylindrical double jacketed tank containing water to be treated. The complete process of desalination is conducted in two steps： the freezing step, leading to the crystallization of the ice layer and the sweating step, which consists of purifying the ice layer in depth by melting the impure zones. The systematic study of the influence of operating parameters has highlighted the important role of the cooling ramp and salinity of the solution on the purity of the ice produced. In the absence of stirring, the temperature of the double jacket also has a noticeable effect on the purity of the ice due to temperature gradients, and consequently, convection currents that may result in the solution. The results of this work show the feasibility of the technique and give a good indication of operating conditions that can be used to produce drinking water.

关键词： Desalination seawater melts crystallization sweating