NADIR Deghfel

Ghalia Seddik , Laifa Abdelkrim

Analyse physico chimiques des eaux usées au niveau de la station d'épuration de l'usine Lafarge Ciment M'sila (LCM)

Boucenna Salah Eddine , Guesmia Mohammed Amine

ETUDE COMPARATIVE DE TRAITEMENT DE LIXIVIATS PAR VOIE CHIMIQUE ET ÉLECTROCHIMIQUE

Study of the antibacterial and a and antioxidant activity of the “Punica granatum” plant from the M’sila region

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Nadir DEGHFEL , ,(2023-11-04), Study of the antibacterial and a and antioxidant activity of the “Punica granatum” plant from the M’sila region,2nd International Conference on Contemporary Academic Research ICCAR 2023,Konya, Turkey

The effect of additives and chemical treatment on mechanical properties of composite material

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Nadir DEGHFEL , ,(2023-10-23), Effect of chemical treatment on mechanical properties of Alfa fiber/ Unsaturated Polyester Composite,1st International Seminar on Chemical Processes and Sustainable Development (ISCPSD'23),Uinversity of 20n august 1955 Skikda

Les argiles sont utilisées dans de nombreux domaines (construction, pharmacie, agriculture, etc.), ce qui motive les experts et les scientifiques à étudier ses propriétés physico-chimiques et sa composition minérale afin d'améliorer son utilisation dans des domaines spécifiques. Notre recherche vise à étudier la composition minérale et les propriétés physico-chimiques des argiles naturelles en raison de leur importance dans le domaine des propriétés d'application. Les propriétés physico-chimiques ont été étudiées- nous n'avons trouvé qu'une argile jaune avec un pH de 7,37, probablement en raison de sels solubles et alcalins tels que des bicarbonates ou des silicates de métaux alcalins. La valeur d'humidité (W) de l'argile jaune (1,31 %) est inférieure, indiquant qu'elle n'est pas hygroscopique. L'indice de gonflement Ig de l'argile jaune (1,49 %) est gonflé facilement. En fonction de la taille et du diamètre des particules (selon la classification ASTM), les échantillons d'argile sont classés en sable fin, moyen et grossier. La méthode FTIR de caractérisation de l'argile était cohérente avec les résultats de l'analyse. L'existence du quartz et de la kaolinite est bien confirmée (caractéristiques des bandes vibratoires de déformation de la liaison Si-O et des vibrations d'étirement du quartz Si-O à 470,4 cm-1, 712 cm-1 et 798,4 cm-1). L'analyse thermogravimétrique TGA a été utilisée pour suivre la stabilité thermique de l'argile. Cela a permis de suivre la perte de masse de l'échantillon en fonction de la température (la perte totale d'argile jaune était d'environ 5,56%). Les phases minérales dans l'échantillon sont identifiées par diffraction des rayons X (XRD).

Citation

KARIMA Larkat , Azzedine BENYAHIA , Nadir DEGHFEL , meftah allal, ,(2023-10-23), Les caractéristiques physicochimiques et la composition minérale de l'argile jaune naturelle (M'sila).,1st International Seminar on Chemical Processes and Sustainable Development, (ISCPSD’23),skikda,algeria

Valorisation et traitement chimique des fibres végétales pour préparer des matériaux composites

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Nadir DEGHFEL , ,(2023-10-18), Valorisation et traitement chimique des fibres végétales pour préparer des matériaux composites,1st International Webinar: Biodiversity Roles in Plants Protection-Arid Regions BRPP-AR: October 18th to 19th, 2023 (CRSTRA, Algeria),Alger

The effect of additives and chemical treatment on mechanical properties of composite material

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Nadir DEGHFEL , ,(2023-10-18), The effect of additives and chemical treatment on mechanical properties of composite material,First National Conference on Advanced Materials and Their Application (NCAMA'2023,Tipaza Algeria

VALORISATION AND CHEMICAL TREATMENT OF VEGETABLE FIBERS TO PREPARE COMPOSITE MATERIALS

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Nadir DEGHFEL , ,(2023-09-26), VALORISATION AND CHEMICAL TREATMENT OF VEGETABLE FIBERS TO PREPARE COMPOSITE MATERIALS,3rd International Conference on Innovative Academic Studies,Konya/Turkey.

Étude et caractérisation d'un matériau composite à base des fibres végétales

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Nadir DEGHFEL , ,(2023-09-25), Étude et caractérisation d'un matériau composite à base des fibres végétales,La Journée Mondiale des Pharmaciens & la 2ème Journée Nationale de Pharmacie,Ain-Témouchent, Algérie

Study of the antibacterial and antioxidant activity of the “Punica granatum” plant from the M’sila region

Citation

Nadir DEGHFEL , ,(2023-09-25), Study of the antibacterial and antioxidant activity of the “Punica granatum” plant from the M’sila region,La Journée Mondiale des Pharmaciens & la 2ème Journée Nationale de Pharmacie,Ain-Témouchent, Algérie

Valorisation et traitement chimiques des fibres végétales pour préparer des matériaux composites

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Nadir DEGHFEL , ,(2023-09-25), Valorisation et traitement chimiques des fibres végétales pour préparer des matériaux composites,First National Symposium on: Water, Health and Environment Impact of Climate Changes,University Abbes Laghrour Khenchela Algeria

Clays are used in a wide variety of fields (e.g. construction, pharmaceuticals, agriculture, etc.), motivating experts and scientists to study the physical-chemical properties of clays and their mineral composition, and to improve their use in their specific fields. Given its importance in the field of use, our research focused on studying the mineral composition of natural clays and their physical-chemical properties. Physical-chemical properties studied - we obtained only a yellow clay with a pH of 7.47, the W % of 1.38% is lower. The Ig swelling index (1.55%) swells slightly. The clay characterization method was revealed by FTIR in agreement with the results revealed by the analysis. The existence of kaolinite and quartz is well confirmed (Si-O bond deformation and Si-O elongation vibration band signatures of quartz located at 470.4 cm-1, 712 cm-1 and 798, 4 cm-1). Kaolinite or Si-group quartz at 1025cm-1) The thermal stability of the clay was monitored by ATG thermogravimetric analysis, which made it possible to track the loss of sample mass as a function of temperature (total loss of clay was approx. 5.56%). the spectral analysis of the d X-ray diffraction (XRD) indicates that it is composed of quartz, calcite and dolomite, which explains why our clay is heterogeneous, the mineralogical composition of the clay fraction of our material is quartz (12.68%) and calcite (50.35%) The results of the elemental chemical analysis (XRF) show that silica (26.42%) and calcium oxide (28.58%) are the major oxides in our sample.

Citation

KARIMA Larkat , Azzedine BENYAHIA , Nadir DEGHFEL , meftah allal, ,(2023-07-10), Elaboration and characterization of physicochemical properties and mineralogical study of natural clay (M'sila area).,5th International Conference on Applied Engineering and Natural Sciences,Konya, Turkey

Elaboration and characterization of physicochemical properties and mineralogical study of natural clay (M'sila area)

Citation

Nadir DEGHFEL , ,(2023-07-10), Elaboration and characterization of physicochemical properties and mineralogical study of natural clay (M'sila area),5th International Conference on Applied Engineering and Natural Sciences,Konya/Turkey

The effect of traitement chimique or preparation of material composite

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Nadir DEGHFEL , ,(2023-07-09), The effect of traitement chimique or preparation of material composite,1st International Webinar « The city at the heart of sustainability and digital challenges: Perspectives on urban and environmental issues». CHSDC 2023.,USTHB – Algeria.

The effect of additives and chemical treatment on mechanical properties of composite material

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Nadir DEGHFEL , ,(2023-06-17), The effect of additives and chemical treatment on mechanical properties of composite material,NATIONALVIRTUAL CONFERENCE ALGERIAN CONFERENCE ON MECHANICS AND SOLAR ENERGY (ACM-SE’ 2023),University Kasdi Merbah OUARGLA-ALGERIA

Valorisation et traitement des fibres végétales pour préparer des matériaux composites

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Nadir DEGHFEL , ,(2023-05-30), Valorisation et traitement des fibres végétales pour préparer des matériaux composites,Célébration de la Journée Mondiale de la Sclérose En Plaques, L’Association Santé au Travail, Sécurité, Hygiène et Environnement,Ain-Témouchent

Researchers are showing increasing interest in plant fiber reinforced composites due to their eco-friendliness, low density, low cost and amazing mechanical properties. However, some challenges remain for researchers in this field, most notably poor adhesion between the polymer matrix and the plant fibers, which reduces the mechanical properties of composites reinforced with these fibers. This study aims to improve the adhesion between the matrix and the reinforcement by chemically treating Alfa fibers (Stipa tenacissima) with a 3 wt% NaOH solution at different times (1, 3, 5 and 24 h). FTIR, DRX, GTA and tensile tests were conducted. XRD tests showed that the crystallinity index of 3% alkali treated Alfa fibers for 5 h increased by 36.26%, compared to that of untreated fibers. The results also revealed that the mechanical properties of composites reinforced with treated fibers outperformed those reinforced with untreated fibers. These findings can contribute to the development of high mechanical performance composites, which can be competitive with those prepared with synthetic fibers. Keywords: composite, Stipa tenacissima, adhesion, tensile strength, alkaline treatment

Citation

AZZEDINE Melouki , Azzedine BENYAHIA , Chouki FARSI , Nadir DEGHFEL , Nouri LAIB , Mahmoud Lebid , , (2023), EFFECT OF ALKALINE TREATMENT ON MECHANICAL PROPERTIES OF ALFA FIBER/UNSATURATED POLYESTER COMPOSITE, Cellulose Chemistry and Technology, Vol:57, Issue:5, pages:607-615, Cellulose Chemistry and Technology

Determination of the regularity domain of crushed rock grain classes by video grain size anlysis (VDG)

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Nadir DEGHFEL , ,(2022-12-13), Determination of the regularity domain of crushed rock grain classes by video grain size anlysis (VDG),1st International Conference on innovative materials for sustainable development,Université Badji Mokhtar Annaba

The effect of alkali and premanganate treatment on the flexural properties of Clay/Sawdust Composite

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Nadir DEGHFEL , ,(2022-11-23), The effect of alkali and premanganate treatment on the flexural properties of Clay/Sawdust Composite,5 th International Eurasian Conference on Biological and Chemical Sciences (EurasianBiochem2021),Konya - Turkey

4 th International Conference on Applied Engineering and Natural Sciences November 10-13, 2022 : Konya, Turkey Abstract Book

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NadirDEGHFEL , ,(2022-11-22); 4 th International Conference on Applied Engineering and Natural Sciences November 10-13, 2022 : Konya, Turkey Abstract Book,,Asst. Prof. Dr. Umut ÖZKAYA

4 th International Conference on Applied Engineering and Natural Sciences

Citation

NadirDEGHFEL , ,(2022-11-22); ICAENS 2022,,Asst. Prof. Dr. Umut ÖZKAYA

Environmental and energy conservation pressure has led to a dramatic increase in the need for economically feasible lightweight materials that can be better substituted for non-biodegradable materials in reinforced composites. To this end, this study examines composite materials prepared from unsaturated polyester resins reinforced with treated and untreated Alfa fibers. Fiber treatment was carried out by NaOH solution of 5% concentration at different times (1, 3, 5 and 24 h). The strength and flexural modulus of the composites were evaluated according to the ASTM D790 test method. The analytical results indicate that the fibers’ alkaline pretreatment time had a positive influence on the mechanical properties of the composites. Keywords: composite, Stipa tenacissima, adhesion, flexion, hydrophilic, alkaline treatment

Citation

Azzedine BENYAHIA , Nouri LAIB , Nadir DEGHFEL , yakout.addour@univ-msila.dz, , (2022), Effect of alkaline treatment time on flexural properties of Alfa fiber/Unsaturated polyester composite, Cellulose Chemistry and Technology, Vol:56, Issue:9, pages:1081-1088, Lilia Daringa

Clays are used in a variety of fields (construction, pharmacy, agriculture, etc.), which motivates experts and scientists to study the physicochemical properties of clay and its mineral composition, and to improve its use in specific fields. Due to its importance in the field of application properties, our research aims to study the mineral composition of natural clays and their physicochemical properties. Physicochemical properties were studied - we only got a yellow clay with a pH of 7.47, probably due to soluble and alkaline salts such as bicarbonates or silicates of alkali metals (usually in the composition of clays). The yellow clay (1.38%) has a lower moisture (W %) value, indicating that it is not hygroscopic. The Ig swelling index (%) of yellow clay (1.55%) is easy to swell. Clay samples are classified into fine, medium, and coarse sand by particle size (as classified by ASTM) and their diameter. The clay characterization method revealed by FTIR was consistent with the results revealed by the analysis. The existence of kaolinite and quartz is well confirmed (characteristics of Si-O bond deformation vibrational bands and Si-O stretching vibrations of quartz at 470.4 cm-1, 712 cm-1 and 798.4 cm-1).The thermal stability of the clay was tracked by TGA thermogravimetric analysis which made it possible to track the mass loss of the sample as a function of temperature (total yellow clay loss was about 5.56%). X-ray diffraction (XRD) is used to identify the mineral phases present in the sample. Keywords: clay, physicochemical properties, mineralogical compositions.

Citation

KARIMA Larkat , Azzedine BENYAHIA , Nadir DEGHFEL , NEDJMA Lahmar , meftah.allal@unuv-biskra.dz, Belfar issam, brahim ben saoucha, ,(2022), Physicochemical properties and mineral composition of natural yellow clay ( M'sila ).,2nd International Conference on Engineering and Applied Natural Sciences,Konya, Turkey

The influences of chemical treatments of the Luffa fibers on mechanical properties of the Luffa/unsaturated polyester composites have been experimentally evaluated and thefollowing conclusions are drawn: (i) The performance of the Luffa /composites is very influenced by the surface properties of the fibers. ii) Alkali treatments, permanganate, bichromate, javel of water and silane have improved the mechanical properties, i.e. flexural properties of the composites in comparison to the untreated ones thanks to interfacial bonding improvement; ii) The flexural properties of their composites were increased after these different treatments and showed maximum improvement in flexural strength of about 23.80 % concerning the javel of water treatment fiber reinforced composites (LFTEJ/UP) (thanks to an enhancement in the interfacial adhesion of the fiber with the polyester resin). Finally, these fibers have a very promising future in composite material

Citation

Nadir DEGHFEL , ,(2019), Study of the mechanical properties of an unsaturated polyester composite reinforced with the luffa sponge fibers,5 international conférence on advances in mechanical engineering istanbul december 17-19 2019,istambul

In this study, a synergistic treatments including alkali, permanganate, dichromate and bleach pretreatment on Luffa sponge fibers (LF) was used as reinforcement in a unsaturated polyester (UP) matrix to improve the mechanical properties of LF/UP composites. The effect of the treatments by: NaOH, K2Cr2O7, KMnO4, NaClO and silane on the performance of the LF/UP composites were evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), mechanical testing (examining flexural). Analysis of the composites suggested that the The results showed that composites reinforced with treated fibers had a higher bending strength than composites reinforced with untreated fibers. Key words : Luffa fiber, composite, alkali treatment, flexural strength.

Citation

Nadir DEGHFEL , Azzedine BENYAHIA , ,(2019), Study of the mechanical properties of an unsaturated polyester composite reinforced with the Luffa sponge fibres,6ème Journées Scientifiques Franco-Maghrébine. Caractérisation des matériaux complexes,Annaba-Algérie

In this study, a synergistic treatments including alkali, permanganate, dichromate and bleach pretreatment on Luffa sponge fibers (LF) was used as reinforcement in a unsaturated polyester (UP) matrix to improve the mechanical properties of LF/UP composites. The effect of the treatments by: NaOH, K2Cr2O7, KMnO4, NaClO and silane on the performance of the LF/UP composites were evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), mechanical testing (examining flexural). Analysis of the composites suggested that the The results showed that composites reinforced with treated fibers had a higher bending strength than composites reinforced with untreated fibers. Key words : Luffa fiber, composite, alkali treatment, flexural strength.

Citation

Nadir DEGHFEL , Azzedine BENYAHIA , ,(2019), Study of the mechanical properties of an unsaturated polyester composite reinforced with the Luffa sponge fibres,5Th International conference on advances in mechanical engineering Istanbul 2019,ISTANBUL-TURKEY

This work is part of the development of local materials, such as vegetable fiber (palm fiber) and red clay from southern Algeria, widely used in the preparation of bricks as rural building materials. Vegetal fibers have very interesting properties, they are: renewable, biodegradable and low cost / lightness ratio. Their mechanical properties are very important. However, the predominant problem in this type of composite material is the weak adhesion of the matrix-fiber interface, probably attributed to the nature of the surface and the hydrophobic character of the natural fibers, thus leading to weak mechanical properties for the material, envisaged composite. The purpose of this study is to treat palm fiber with a basic solution of sodium hydroxide (4% w/v NaOH) for varying periods of time: 3, 7, 24 and 48 hours to improve interfacial adhesion. The results obtained from the tests carried out on the composite reinforced with palm fibers treated during 7 hours, showed a clear increase as regards the resistance to bending and compression; it is respectively of the order of 57 and 60%, compared to the composite reinforced by the untreated fibers. It can be deduced that palm fibers can be considered as one of the suitable materials for clay reinforcement

Citation

Nadir DEGHFEL , , (2019), Étude de l’effet du temps de traitement alcalin de fibres palmier sur le comportement mécanique des matériaux à base d’argile rouge de la région de M’sila, Matériaux & Techniques, Vol:1, Issue:107, pages:1, Matériaux & Techniques

Study of the mechanical properties of an unsaturated polyester composite reinforced with the Luffa sponge fibers

Citation

Nadir DEGHFEL , Azzedine BENYAHIA , ,(2019), Study of the mechanical properties of an unsaturated polyester composite reinforced with the Luffa sponge fibers,6èmes Caractérisation Journées Scientifiques des Matériaux Franco-Maghrébines,Université Badji Mokhtar Annaba

In this study, a synergistic treatments including alkali, permanganate, dichromate and bleach pretreatment on Luffa sponge fibers (LF) was used as reinforcement in a unsaturated polyester (UP) matrix to improve the mechanical properties of LF/UP composites. The effect of the treatments by: NaOH, K2Cr2O7, KMnO4 and NaClO on the performance of the LF/UP composites were evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), mechanical testing (examining flexural), thermogravimetric analysis (TGA). Analysis of the composites suggested that the The results showed that composites reinforced with treated fibers had a higher bending strength than composites reinforced with untreated fibers.

Citation

Nadir DEGHFEL , ,(2018), Study of the mechanical properties of an unsaturated polyester composite reinforced with the luffa sponge fibers,4 international conférence on advances in mechanical engineering istanbul december 17-19 2019,istambul

In this study, a synergistic treatments including alkali, permanganate, dichromate and bleach pretreatment on Luffa sponge fibers (LF) was used as reinforcement in a unsaturated polyester (UP) matrix to improve the mechanical properties of LF/UP composites. The effect of the treatments by: NaOH, K2Cr2O7, KMnO4, NaClO and silane on the performance of the LF/UP composites were evaluated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), mechanical testing (examining flexural). Analysis of the composites suggested that the The results showed that composites reinforced with treated fibers had a higher bending strength than composites reinforced with untreated fibers.

Citation

Nadir DEGHFEL , ,(2018), THE 5 INTERNATIONAL COLLOQUIUM CORROSION & MATERIAL'S PROTECTION,THE ORGANIZING COMMITTEE OF THE CORROSION & MATERIAL'S PROTECTION COLLOQUIUM CMP 18,MONASTIR - TUNISIA

The present work aims to reduce the impact of vat dyes by a natural and activated Algerian clay using the adsorption technique. The adsorption experiments show that the clay used is very effective in removing the vat dye at relatively low concentrations in an aqueous medium. The adsorption isotherms of the vat dye on the raw clay are satisfactorily described by the Langmuir model. Adsorption capacities in the range of 55.25 mg.g
1 for crude bentonite (BB), 55.20 mg.g
1 for sodium bentonite (BS), 51.78 mg.g
1 for red clay (AR) and 48.24 mg.g
1 for Madadid clay (AM) were determined from the Langmuir isotherm. These values show that the raw bentonite has a better adsorption capacity because it contains a large percentage of clay fraction. Keywords: clay / adsorption / water / vat dye / pollutants

Citation

Nadir DEGHFEL , Azzedine BENYAHIA , BELMOKRE Kamel, ERRACHID Abdelhamid, ,(2018), Removal capacity and adsorption mechanism of a clay and bentonite for a textile dye,Quatrièmes Journées Internationales de Chimie Organique de Annaba-JICOA’18,Annaba-Algérie

The present work aims to reduce the impact of vat dyes by a natural and activated Algerian clay using the adsorption technique. The adsorption experiments show that the clay used is very effective in removing the vat dye at relatively low concentrations in an aqueous medium. The adsorption isotherms of the vat dye on the raw clay are satisfactorily described by the Langmuir model. Adsorption capacities in the range of 55.25 mg.g−1 for crude bentonite (BB), 55.20 mg.g−1 for sodium bentonite (BS), 51.78 mg.g−1 for red clay (AR) and 48.24 mg.g−1 for Madadid clay (AM) were determined from the Langmuir isotherm. These values show that the raw bentonite has a better adsorption capacity because it contains a large percentage of clay fraction

Citation

Nadir DEGHFEL , , (2018), étude comparative de l'adsorption d'un colorant de cuve sur différents adsorbants à base d'un matériau inorganique la bentonite et l'argile de la région de M'sila, materials science & engineering, Vol:0, Issue:105, pages:10, Matériaux&techniques