Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.22981
Soulaiman Iaich
The target of this study is the preparation of ceramic supports with tubular configuration of a good quality. In this case, we used local clay from Meknes area as a basic material and solid waste from wood industry as an agent of porosity because they are cheap and available. Percentages of wood powder used in the preparation of clay pastes to extrude the supports are 0, 5 and 10 % (w/w). Consequently, analysis of findings shows that the elaborated supports are in a good sintering state and are chemically very resistant. Besides, porosity and mechanical resistance increase with the addition of wood powder. Moreover, values in permeation flux increases with both the function of the final sintering temperature and the percentage of the added wood powder.
{"title":"Elaboration and characterization of low cost tubular ceramic supports made of Moroccan clay for microfiltration and ultrafiltration membranes","authors":"Soulaiman Iaich","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.22981","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.22981","url":null,"abstract":"The target of this study is the preparation of ceramic supports with tubular configuration of a good quality. In this case, we used local clay from Meknes area as a basic material and solid waste from wood industry as an agent of porosity because they are cheap and available. Percentages of wood powder used in the preparation of clay pastes to extrude the supports are 0, 5 and 10 % (w/w). Consequently, analysis of findings shows that the elaborated supports are in a good sintering state and are chemically very resistant. Besides, porosity and mechanical resistance increase with the addition of wood powder. Moreover, values in permeation flux increases with both the function of the final sintering temperature and the percentage of the added wood powder.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46135375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.21044
A. Ouissal, Y. Miyah, L. Nahali, A. Badraoui, N. Valentin, B. E. Khazzan, F. Zerrouq, A. Kherbeche
Promising catalyst of cooper impregnated on natural material (CT) synthesized via wet impregnation method, in order to enhance the catalytic wet peroxide oxidation during the degradation of organic matter in a batch reactor under mild conditions. Three different percentages of copper metal (2.5, 5 and 7.5 %) incorporated into CT material which are referred as follows 2.5% Cu-CT, 5% Cu-CT and 7.5% Cu-CT were investigated in the oxidation catalytic of methyl green (MG) dye. The chemical composition, the morphology and the structure of raw CT and all prepared samples, were investigated by X-ray fluorescence, Fourier transform infrared spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM) to get a better understand concerning the catalytic activity behavior of Cu-CT catalyst. Different variable examined the catalytic activity of the samples obtained such as initial concentrations of dye, copper (Cu) loading, temperature and H 2 O 2 effect was investigated to enhance the MG conversion. CWPO experiments showed that 2.5% Cu-CT catalysts have the maximum catalytic activity during the degradation of MG dye. The presence of copper on CT support ameliorates the hydroxyl radicals in the reaction medium after the contact with H 2 O 2 thus enhanced the catalytic conversion of the CT pristine. The optimum conditions showing an important catalytic conversion of MG dye (95 %) at 2.5% of copper loading, 139.10 -3 mol.L -1 H 2 O 2, temperature of 40 °C and at pH 6.0 during 30 min as a reaction time.
{"title":"Copper-impregnated on natural material as promising catalysts for the wet hydrogen peroxide catalytic oxidation of Methyl Green","authors":"A. Ouissal, Y. Miyah, L. Nahali, A. Badraoui, N. Valentin, B. E. Khazzan, F. Zerrouq, A. Kherbeche","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.21044","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.21044","url":null,"abstract":"Promising catalyst of cooper impregnated on natural material (CT) synthesized via wet impregnation method, in order to enhance the catalytic wet peroxide oxidation during the degradation of organic matter in a batch reactor under mild conditions. Three different percentages of copper metal (2.5, 5 and 7.5 %) incorporated into CT material which are referred as follows 2.5% Cu-CT, 5% Cu-CT and 7.5% Cu-CT were investigated in the oxidation catalytic of methyl green (MG) dye. The chemical composition, the morphology and the structure of raw CT and all prepared samples, were investigated by X-ray fluorescence, Fourier transform infrared spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM) to get a better understand concerning the catalytic activity behavior of Cu-CT catalyst. Different variable examined the catalytic activity of the samples obtained such as initial concentrations of dye, copper (Cu) loading, temperature and H 2 O 2 effect was investigated to enhance the MG conversion. CWPO experiments showed that 2.5% Cu-CT catalysts have the maximum catalytic activity during the degradation of MG dye. The presence of copper on CT support ameliorates the hydroxyl radicals in the reaction medium after the contact with H 2 O 2 thus enhanced the catalytic conversion of the CT pristine. The optimum conditions showing an important catalytic conversion of MG dye (95 %) at 2.5% of copper loading, 139.10 -3 mol.L -1 H 2 O 2, temperature of 40 °C and at pH 6.0 during 30 min as a reaction time.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42128018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.21313
O. Abdellaoui, M. Skalli, A. Haoudi, Y. Rodi, N. Arrousse, M. Taleb, R. Ghibate, O. Senhaji
The anticorrosive effect of surfactant, 12-(2,3-dioxoindolin-1-yl)-N,N,N-trimethyldodecanammonium bromide 3 on the corrosion of mild steel in 1M hydrochloric acid was assessed by gravimetric and electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy). The results have shown that our synthesized surfactant is an excellent corrosion inhibitor for mild steel in 1 M HCl. Inhibitory efficacy of up to 95.9% was exhibited by surfactant 3 at a concentration of 1 mM after 6 h immersion at 298K. Based on the polarization curves, it is clear that the surfactant 3 can be considered as a mixed inhibitor with a predominantly anodic character. The inhibitory effectiveness increases with increasing concentration but decreases with increasing temperature. It was found that the adsorption of the inhibitor on the surface of the mild steel in 1M HCl followed the Langmuir adsorption isotherm. In this context, the main kinetic and thermodynamic parameters were determined and discussed.
{"title":"Study of the inhibition of corrosion of mild steel in a 1M HCl solution by a new quaternary ammonium surfactant","authors":"O. Abdellaoui, M. Skalli, A. Haoudi, Y. Rodi, N. Arrousse, M. Taleb, R. Ghibate, O. Senhaji","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.21313","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.21313","url":null,"abstract":"The anticorrosive effect of surfactant, 12-(2,3-dioxoindolin-1-yl)-N,N,N-trimethyldodecanammonium bromide 3 on the corrosion of mild steel in 1M hydrochloric acid was assessed by gravimetric and electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy). The results have shown that our synthesized surfactant is an excellent corrosion inhibitor for mild steel in 1 M HCl. Inhibitory efficacy of up to 95.9% was exhibited by surfactant 3 at a concentration of 1 mM after 6 h immersion at 298K. Based on the polarization curves, it is clear that the surfactant 3 can be considered as a mixed inhibitor with a predominantly anodic character. The inhibitory effectiveness increases with increasing concentration but decreases with increasing temperature. It was found that the adsorption of the inhibitor on the surface of the mild steel in 1M HCl followed the Langmuir adsorption isotherm. In this context, the main kinetic and thermodynamic parameters were determined and discussed.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41639718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.18991
F. Erraib, K. E. Ass
The production of olive oil, leads to the co-production of large quantities of olive mill wastewater (OMW). This waste has a high polluting power as well as a high antibacterial activity exerted, among others, by various phenolic compounds. In this study, the Fenton process using hydrogen peroxide (H 2 O 2 ) as oxidant and ferrous ions (Fe 2+ ) as catalyst was used to treat OMW. Box–Behnken design (BBD) based on the response surface methodology (RSM) was adopted to evaluate the effects of concentration [H 2 O 2 ], concentration [Fe 2+ ] and reaction time on the chemical oxygen demand (COD) removal, phenolic compounds (PC) removal and the residual H 2 O 2 level remaining in the solution. According to the Analysis of Variance (ANOVA), the three quadratic models that were developed using multiple regression analysis were reliable and successfully fit the experimental data with a high coefficient of determination R 2 ranging from 0,9969 to 0,9999. Optimal operating conditions based on the desirability function methodology were found to be [H 2 O 2 ] = 13,79g/l (0,4mol/l), [Fe 2+ ] = 0,55g/l (0,01mol/l) and reaction time = 5,73h. Under the values of these variables, COD removal of 88,70% and PC removal of 84,26% with no residual H 2 O 2 were predicted with a desirability value of 1.
{"title":"Optimizing the removal of COD and Phenolic compounds from olive mill wastewater by Fenton oxidation using experimental design","authors":"F. Erraib, K. E. Ass","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.18991","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.18991","url":null,"abstract":"The production of olive oil, leads to the co-production of large quantities of olive mill wastewater (OMW). This waste has a high polluting power as well as a high antibacterial activity exerted, among others, by various phenolic compounds. In this study, the Fenton process using hydrogen peroxide (H 2 O 2 ) as oxidant and ferrous ions (Fe 2+ ) as catalyst was used to treat OMW. Box–Behnken design (BBD) based on the response surface methodology (RSM) was adopted to evaluate the effects of concentration [H 2 O 2 ], concentration [Fe 2+ ] and reaction time on the chemical oxygen demand (COD) removal, phenolic compounds (PC) removal and the residual H 2 O 2 level remaining in the solution. According to the Analysis of Variance (ANOVA), the three quadratic models that were developed using multiple regression analysis were reliable and successfully fit the experimental data with a high coefficient of determination R 2 ranging from 0,9969 to 0,9999. Optimal operating conditions based on the desirability function methodology were found to be [H 2 O 2 ] = 13,79g/l (0,4mol/l), [Fe 2+ ] = 0,55g/l (0,01mol/l) and reaction time = 5,73h. Under the values of these variables, COD removal of 88,70% and PC removal of 84,26% with no residual H 2 O 2 were predicted with a desirability value of 1.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44233127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.22438
A. Ainane, M. Taleb, Tarik Ainane, F. El-hajjaji, B. Hammouti
This work proposes the studying of characterization analysis of two natural Moroccan clays (RC and GC) in the same location from Bejaad (Province of Khouribga, Morocco) and to know the relationship dependence between them. The values obtained during the determination of a few parameters (density, pH, conductivity, dry matter - moisture content, organic matter-mineral matter) show that the two materials RC and GC studied have the same physical-chemical properties. The all characterization of the two clays was carried out by XRD, XRF, FTIR, SEM/EDX and TGA. The results obtained show that the two materials have very irregular and microporous structures, a heterogeneity of the pore forms and they are contain a mixture of Kaolinite, Illite, Quartz, Calcite, and Dolomite, with the presence of Hematite only in clay RC. On the other hand, The statistical approach applied to determine the dependence relationship between the two clays was based on two tests: Student's t-test (Comparison of two means for physical-chemical parameters) and Pearson's test (contingency table for XRF analysis) in order to prove that the two materials studied are the same chemical and physical-chemical characteristics.
{"title":"Study of dependence between two types of most abundant natural clays in Bejaad province (Central Morocco) using a statistical approach","authors":"A. Ainane, M. Taleb, Tarik Ainane, F. El-hajjaji, B. Hammouti","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.22438","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.22438","url":null,"abstract":"This work proposes the studying of characterization analysis of two natural Moroccan clays (RC and GC) in the same location from Bejaad (Province of Khouribga, Morocco) and to know the relationship dependence between them. The values obtained during the determination of a few parameters (density, pH, conductivity, dry matter - moisture content, organic matter-mineral matter) show that the two materials RC and GC studied have the same physical-chemical properties. The all characterization of the two clays was carried out by XRD, XRF, FTIR, SEM/EDX and TGA. The results obtained show that the two materials have very irregular and microporous structures, a heterogeneity of the pore forms and they are contain a mixture of Kaolinite, Illite, Quartz, Calcite, and Dolomite, with the presence of Hematite only in clay RC. On the other hand, The statistical approach applied to determine the dependence relationship between the two clays was based on two tests: Student's t-test (Comparison of two means for physical-chemical parameters) and Pearson's test (contingency table for XRF analysis) in order to prove that the two materials studied are the same chemical and physical-chemical characteristics.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46295184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.17486
Azeez Abdullah Barzinjy, S. M. Hamad, Ashna F. Arkawazi
Fourth generation of ionic liquids, relatively cheaper and environmental friendly, is called deep eutectic solvents (DESs). Generally, at present time are extensively recognized as novel remarkable as well as green alternative solvents to the conventional ionic liquids owing to their low cost and tolerance to moisture. DESs first came to the public vision in 2001, since then, researches and applications of deep eutectic solvents can cover, almost, all of the fields of science. In this study the physical, thermal and structural properties of 1ChCl: 2Urea based ionic liquids is reported. Firstly, the physical properties, in terms of viscosity, conductivity and density as a function of temperature are investigated intensively. Later, the microscopic structure of 1ChCl: 2Urea is studied by means of FTIR spectroscopy. Finally, the thermal properties, in terms of melting temperature and thermal stability, are also reported in this investigation. Overall, the obtained data and inspections are in an excellent agreement with the previous studies.
{"title":"Physical, thermal and structural properties of 1ChCl: 2 Urea based ionic liquids","authors":"Azeez Abdullah Barzinjy, S. M. Hamad, Ashna F. Arkawazi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.17486","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.17486","url":null,"abstract":"Fourth generation of ionic liquids, relatively cheaper and environmental friendly, is called deep eutectic solvents (DESs). Generally, at present time are extensively recognized as novel remarkable as well as green alternative solvents to the conventional ionic liquids owing to their low cost and tolerance to moisture. DESs first came to the public vision in 2001, since then, researches and applications of deep eutectic solvents can cover, almost, all of the fields of science. In this study the physical, thermal and structural properties of 1ChCl: 2Urea based ionic liquids is reported. Firstly, the physical properties, in terms of viscosity, conductivity and density as a function of temperature are investigated intensively. Later, the microscopic structure of 1ChCl: 2Urea is studied by means of FTIR spectroscopy. Finally, the thermal properties, in terms of melting temperature and thermal stability, are also reported in this investigation. Overall, the obtained data and inspections are in an excellent agreement with the previous studies.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44288666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.18721
K. E. Khatabi, I. Aanouz, R. El-mernissi, Aoub khaldan, M. A. Ajana, M. Bouachrine, T. Lakhlifi
A series of twenty one thiadiazole-thiazolone derivatives which is a class of highly potent human mitotic kinesin Eg5 inhibitor reported from published article were studied through a series of computer-aided drug design processes such as three-dimensional quantitative structure-activity relationship (3D-QSAR) modeling, including comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) and Surflex-docking method using 17 compounds as training set. Both models showed good statistical quality and satisfying predictive ability (Q 2 = 0.617 and R 2 =0.919 for CoMFA ) and (Q 2 = 0.638 and R 2 =0.919 for CoMSIA ). The aim of this study was to explore 3D-QSAR approaches to propose new thiadiazole-thiazolone derivatives as Eg5 inhibitors for human mitotic kinesin. The CoMFA/CoMSIA contour maps were generated to provide the information about regions where the activity might be increased or decreased. Moreover, Based on the X-ray crystallized complex (PDB ID: 2UYM) molecular docking was performed on the most potent proposed Eg5 inhibitors using Surflex-dock method as an approach to investigate the stability of docked conformation and study the binding interactions in detail.
{"title":"In silico analysis of 3D QSAR and Molecular Docking studies to discover new thiadiazole-thiazolone derivatives as mitotic kinesin Eg5 inhibition","authors":"K. E. Khatabi, I. Aanouz, R. El-mernissi, Aoub khaldan, M. A. Ajana, M. Bouachrine, T. Lakhlifi","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.18721","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.18721","url":null,"abstract":"A series of twenty one thiadiazole-thiazolone derivatives which is a class of highly potent human mitotic kinesin Eg5 inhibitor reported from published article were studied through a series of computer-aided drug design processes such as three-dimensional quantitative structure-activity relationship (3D-QSAR) modeling, including comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) and Surflex-docking method using 17 compounds as training set. Both models showed good statistical quality and satisfying predictive ability (Q 2 = 0.617 and R 2 =0.919 for CoMFA ) and (Q 2 = 0.638 and R 2 =0.919 for CoMSIA ). The aim of this study was to explore 3D-QSAR approaches to propose new thiadiazole-thiazolone derivatives as Eg5 inhibitors for human mitotic kinesin. The CoMFA/CoMSIA contour maps were generated to provide the information about regions where the activity might be increased or decreased. Moreover, Based on the X-ray crystallized complex (PDB ID: 2UYM) molecular docking was performed on the most potent proposed Eg5 inhibitors using Surflex-dock method as an approach to investigate the stability of docked conformation and study the binding interactions in detail.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44741387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.17653
A. Alami, S. Achamlale, Younas Aouine, H. Zouihri
We report in this paper the synthesis of some new N -protected 2-(substituted-1 H -1,2,3-triazol-1-yl)glycine derivatives through saponification reaction in basic medium. The structures of obtained products were established on the basis of NMR spectroscopy ( 1 H, 13 C), MS data and elemental analysis.
{"title":"Synthesis of Some New N-protected 2-(Substituted-1H-1,2,3-Triazol-1-yl)glycine Derivatives","authors":"A. Alami, S. Achamlale, Younas Aouine, H. Zouihri","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.17653","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.17653","url":null,"abstract":"We report in this paper the synthesis of some new N -protected 2-(substituted-1 H -1,2,3-triazol-1-yl)glycine derivatives through saponification reaction in basic medium. The structures of obtained products were established on the basis of NMR spectroscopy ( 1 H, 13 C), MS data and elemental analysis.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47287126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.23162
M. Masrournia
This work presents a novel method investigated in the pre-concentration of lead ion as well as the matrix effect eliminated in high salinity medium using solid phase extraction by graphite furnace Atomic Absorption spectroscopy (GFAAS). Fe 3 O 4 -graphene was used as the sorbent while 1M HNO 3 was used as the extraction solvent. Parameters such as: pH, amount of sorbent, time of adsorption, time of desorption and, stirring rate affecting the extraction efficiency of the method were studied and optimized by utilizing two decent optimization methods; factorial design and central composite design (CCD). The limit of detection and limit of quantification were 4.4 and 14.8 ng/mL, respectively The accuracy of the method was evaluated by analyzing a spiked real sample. Good spiked recoveries over the range 98.8-103.6 % were obtained. Under the optimum conditions, the calibration graph was linear over the range 5-50 ng/mL. The relative standard deviation was 4.4 % for four repeated determinations at a concentration of 20 ng/mL.
{"title":"Solid - phase extraction of Lead in saline matrix using by GF- AAS with multivariate optimization","authors":"M. Masrournia","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I2.23162","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I2.23162","url":null,"abstract":"This work presents a novel method investigated in the pre-concentration of lead ion as well as the matrix effect eliminated in high salinity medium using solid phase extraction by graphite furnace Atomic Absorption spectroscopy (GFAAS). Fe 3 O 4 -graphene was used as the sorbent while 1M HNO 3 was used as the extraction solvent. Parameters such as: pH, amount of sorbent, time of adsorption, time of desorption and, stirring rate affecting the extraction efficiency of the method were studied and optimized by utilizing two decent optimization methods; factorial design and central composite design (CCD). The limit of detection and limit of quantification were 4.4 and 14.8 ng/mL, respectively The accuracy of the method was evaluated by analyzing a spiked real sample. Good spiked recoveries over the range 98.8-103.6 % were obtained. Under the optimum conditions, the calibration graph was linear over the range 5-50 ng/mL. The relative standard deviation was 4.4 % for four repeated determinations at a concentration of 20 ng/mL.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42592055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.20462
A. Zeroual
The epoxidation of limonene 1 with m-CPBA has been examined within the MEDT at the B3LYP/6-311(d,p) computational level. The chemo- and stereoisomeric reaction paths involving the two C=C double bonds of limonene have been scrutinized. DFT computations account for the high chemospecifity involving the C 1 =C 2 double bond and the stereospecifity, in complete conformity with the experimental results. An ELF analysis of the epoxidation shows the formation of the epoxide ring taking place of the two new C-O single bonds is somewhat asynchronous.
{"title":"Theoretical investigation of the mechanism, chemo- and stereospecifity in the epoxidation reaction of limonene with meta-chloroperoxybenzoic acid (m-CPBA)","authors":"A. Zeroual","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.20462","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.20462","url":null,"abstract":"The epoxidation of limonene 1 with m-CPBA has been examined within the MEDT at the B3LYP/6-311(d,p) computational level. The chemo- and stereoisomeric reaction paths involving the two C=C double bonds of limonene have been scrutinized. DFT computations account for the high chemospecifity involving the C 1 =C 2 double bond and the stereospecifity, in complete conformity with the experimental results. An ELF analysis of the epoxidation shows the formation of the epoxide ring taking place of the two new C-O single bonds is somewhat asynchronous.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43003858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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