Pub Date : 2020-06-24DOI: 10.13171/mjc9602001021024ms
M. Said, Widya Twiny Rizki, W. Purwaningrum, A. Rachmat, Ferlinahayati Ferlinahayati, P. Hariani
Modification of bentonite material using doping Fe(III) was conducted. The purpose of this study is to increase the capacity and effectiveness of bentonite adsorption. The characterization of material was carried out using XRD, XRF, BET and FTIR spectrophotometers. The material produced were used as an adsorbent of phenol in an aqueous medium. The result of characterization material using XRD analysis was showed the difference between unmodified bentonite and modified bentonite, it is indicated from a shift of diffraction peak at 3-10°. The result of XRF analysis was showed the increasing of the iron element on doped bentonite, from 21.3 to 59.11%. The result of BET analysis was showed isotherm adsorption fitted to type IV, which indicates bentonite has a mesoporous type with a size 5-50 nm and natural bentonite has a smaller pore size than activated and doped bentonite. From the FTIR spectrum, there is no chemical interaction between adsorbent and adsorbate. The adsorption rate was fitted to pseudo-first-order. The maximum capacity of phenol adsorption at 60 minutes for controlled was 7.186% and for doped bentonite was 16.4651%. Thermodynamics study explained that the adsorption process occurred spontaneously. It can be concluded that modification bentonite use doping Fe(III) can enhance its ability to adsorbed phenol.
{"title":"Modification Bentonite Using Fe(III) and Its Application as Adsorbent for Phenol","authors":"M. Said, Widya Twiny Rizki, W. Purwaningrum, A. Rachmat, Ferlinahayati Ferlinahayati, P. Hariani","doi":"10.13171/mjc9602001021024ms","DOIUrl":"https://doi.org/10.13171/mjc9602001021024ms","url":null,"abstract":"Modification of bentonite material using doping Fe(III) was conducted. The purpose of this study is to increase the capacity and effectiveness of bentonite adsorption. The characterization of material was carried out using XRD, XRF, BET and FTIR spectrophotometers. The material produced were used as an adsorbent of phenol in an aqueous medium. The result of characterization material using XRD analysis was showed the difference between unmodified bentonite and modified bentonite, it is indicated from a shift of diffraction peak at 3-10°. The result of XRF analysis was showed the increasing of the iron element on doped bentonite, from 21.3 to 59.11%. The result of BET analysis was showed isotherm adsorption fitted to type IV, which indicates bentonite has a mesoporous type with a size 5-50 nm and natural bentonite has a smaller pore size than activated and doped bentonite. From the FTIR spectrum, there is no chemical interaction between adsorbent and adsorbate. The adsorption rate was fitted to pseudo-first-order. The maximum capacity of phenol adsorption at 60 minutes for controlled was 7.186% and for doped bentonite was 16.4651%. Thermodynamics study explained that the adsorption process occurred spontaneously. It can be concluded that modification bentonite use doping Fe(III) can enhance its ability to adsorbed phenol.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"62 1","pages":"422-431"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90389551","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 : 2020-06-23DOI: 10.13171/mjc10602006231292iz
Saida Cherif Hamida, Imane Zalegh, F. Saidi, Nabahat Benmanssour, M. C. González-Mas, M. Blázquez, R. Mhand, M. Akssira
The plants of the Apiaceae family are mainly used for food purposes and their multiple therapeutic properties and biological activities. This study aims to determine the chemical composition of Essential Oil (EO) of the fruits of Smyrnium olusatrum L. obtained by hydrodistillation in Clevenger-type apparatus. GC/MS analyzed the EO and the antibacterial activity was evaluated against clinical bacterial strains by two complementary methods (Disc diffusion and micro-atmosphere) and determination of Minimal Inhibitory Concentration (MIC). The results of chemical composition show that the EO is dominated by hydrocarbon monoterpenes (55,95%). The antibacterial effect shows that Gram-positive bacteria are the most sensitive to the inhibitory action of EO with inhibition zone diameters (DZI) ranging from 18 to 20 mm for Staphylococcus aureus and Streptococcus faecium strains. The same results were reported with the micro-atmosphere
{"title":"Chemical composition and antibacterial effect of Smyrnium olusatrum L. Fruit Essential Oil","authors":"Saida Cherif Hamida, Imane Zalegh, F. Saidi, Nabahat Benmanssour, M. C. González-Mas, M. Blázquez, R. Mhand, M. Akssira","doi":"10.13171/mjc10602006231292iz","DOIUrl":"https://doi.org/10.13171/mjc10602006231292iz","url":null,"abstract":"The plants of the Apiaceae family are mainly used for food purposes and their multiple therapeutic properties and biological activities. This study aims to determine the chemical composition of Essential Oil (EO) of the fruits of Smyrnium olusatrum L. obtained by hydrodistillation in Clevenger-type apparatus. GC/MS analyzed the EO and the antibacterial activity was evaluated against clinical bacterial strains by two complementary methods (Disc diffusion and micro-atmosphere) and determination of Minimal Inhibitory Concentration (MIC). The results of chemical composition show that the EO is dominated by hydrocarbon monoterpenes (55,95%). The antibacterial effect shows that Gram-positive bacteria are the most sensitive to the inhibitory action of EO with inhibition zone diameters (DZI) ranging from 18 to 20 mm for Staphylococcus aureus and Streptococcus faecium strains. The same results were reported with the micro-atmosphere","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"186 1","pages":"577-584"},"PeriodicalIF":0.0,"publicationDate":"2020-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80621816","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 : 2020-06-22DOI: 10.13171/mjc10602006221445nb
F. Boutaleb, N. Boutaleb, Bouchaib Bahlaouan, Deblij Sanaa, S. Antri
This study offers an easy, economical, and ecological solution to manufacture a ceramic faience product with excellent mechanical properties by combining Moroccan phosphate mine tailings and two abundant local clays. The use of these clays alone was inconceivable because they do not generate a material that meets the mechanical requirements. A mixture design strategy conducted the optimization of the formulation. Therefore, ten tests were carried out. The ceramic tiles produced are characterized by their physical properties (water absorption, shrinkage), mechanical properties (flexural strength), and surface properties (observation by scanning electron microscopy). The results show that phosphate mine tailings improve the mechanical properties of ceramic tiles. Industrial use at a rate of 33% in formulas based on abundant local clays could, therefore, be envisaged to design faience products, conforming to the mechanical and technical requirements. This mode of production contributes to saving non-renewable natural resources, preserving the environment, and aligns with the principle of sustainable development.
{"title":"Production of ceramic tiles by combining Moroccan phosphate mine tailings with abundant local clays","authors":"F. Boutaleb, N. Boutaleb, Bouchaib Bahlaouan, Deblij Sanaa, S. Antri","doi":"10.13171/mjc10602006221445nb","DOIUrl":"https://doi.org/10.13171/mjc10602006221445nb","url":null,"abstract":"This study offers an easy, economical, and ecological solution to manufacture a ceramic faience product with excellent mechanical properties by combining Moroccan phosphate mine tailings and two abundant local clays. The use of these clays alone was inconceivable because they do not generate a material that meets the mechanical requirements. A mixture design strategy conducted the optimization of the formulation. Therefore, ten tests were carried out. The ceramic tiles produced are characterized by their physical properties (water absorption, shrinkage), mechanical properties (flexural strength), and surface properties (observation by scanning electron microscopy). The results show that phosphate mine tailings improve the mechanical properties of ceramic tiles. Industrial use at a rate of 33% in formulas based on abundant local clays could, therefore, be envisaged to design faience products, conforming to the mechanical and technical requirements. This mode of production contributes to saving non-renewable natural resources, preserving the environment, and aligns with the principle of sustainable development.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"110 1","pages":"568-576"},"PeriodicalIF":0.0,"publicationDate":"2020-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76131036","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 : 2020-06-20DOI: 10.13171/mjc106020201368ym
Y. Merroun, S. Chehab, Tourya Ghailane, R. Ghailane, S. Boukhris, A. Hassikou, N. Habbadi, B. Lakhrissi, A. Souizi
A simple and efficient method for the synthesis of quinazolin-4(3H)-one derivatives via condensation of anthranilamide with aromatic aldehyde catalyzed by monoammonium phosphate (MAP), diammonium phosphate (DAP), and triple superphosphate (TSP), were developed. The modification of these three phosphate fertilizers using titanium tetrachloride (TiCl 4 ) has increased their catalytic efficiency. The prepared titanium phosphate (TiP 2 O 7 ) was characterized using microscopic and spectroscopic methods, namely X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and infrared spectroscopy (IR). The TiP 2 O 7 was applied for the first time as a heterogeneous catalyst in quinazolin-4(3H)-ones synthesis. High yields and short reaction times were observed in the determined optimal condition (solvent nature, volume, and catalyst amount). This study shows that the TiP 2 O 7 presents an exciting catalytic activity and long-term durability compared to those of MAP, DAP, and TSP.
{"title":"Comparative study between the Titanium Phosphate TiP2O7 and the Phosphate Fertilizers in the catalysis of the Quinazolin-4(3H)-one derivatives synthesis","authors":"Y. Merroun, S. Chehab, Tourya Ghailane, R. Ghailane, S. Boukhris, A. Hassikou, N. Habbadi, B. Lakhrissi, A. Souizi","doi":"10.13171/mjc106020201368ym","DOIUrl":"https://doi.org/10.13171/mjc106020201368ym","url":null,"abstract":"A simple and efficient method for the synthesis of quinazolin-4(3H)-one derivatives via condensation of anthranilamide with aromatic aldehyde catalyzed by monoammonium phosphate (MAP), diammonium phosphate (DAP), and triple superphosphate (TSP), were developed. The modification of these three phosphate fertilizers using titanium tetrachloride (TiCl 4 ) has increased their catalytic efficiency. The prepared titanium phosphate (TiP 2 O 7 ) was characterized using microscopic and spectroscopic methods, namely X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and infrared spectroscopy (IR). The TiP 2 O 7 was applied for the first time as a heterogeneous catalyst in quinazolin-4(3H)-ones synthesis. High yields and short reaction times were observed in the determined optimal condition (solvent nature, volume, and catalyst amount). This study shows that the TiP 2 O 7 presents an exciting catalytic activity and long-term durability compared to those of MAP, DAP, and TSP.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"7 1","pages":"553-567"},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78538502","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 : 2020-06-19DOI: 10.13171/mjc10602006191398as
S. Abderrahman, E. Abdelhafed, Lacherai Abdellah, El Ouadi Brahim, Jilale Abderrahim
In this study, we described an original, new, simple, and productive one-pot method for Thymol para-sulfonation by using thionyl chloride (SOCl 2 ) as a sulfonating agent under mild conditions. Spectroscopic analysis by FT-IR, mass spectrometry, and NMR 1H and 13C confirmed the structure of the parasulfonated derivative of Thymol: the 4-hydroxy-5-isopropyl-2-methylbenzenesulfonic acid. An optimization study was carried out to perform and improve the yield of this new para-sulfonation method by studying the effect of three parameters: temperature, the molar ratio (η) of the reactants, and solvents. The obtained results showed that the use of cyclohexane as a solvent, a molar ratio greater or equal than 3, and working under low temperatures increase the yield of this parasulfonation considerably to reach adequately 91.3%.
{"title":"Original process for Thymol Para-sulfonation: A Preliminary Optimization Study","authors":"S. Abderrahman, E. Abdelhafed, Lacherai Abdellah, El Ouadi Brahim, Jilale Abderrahim","doi":"10.13171/mjc10602006191398as","DOIUrl":"https://doi.org/10.13171/mjc10602006191398as","url":null,"abstract":"In this study, we described an original, new, simple, and productive one-pot method for Thymol para-sulfonation by using thionyl chloride (SOCl 2 ) as a sulfonating agent under mild conditions. Spectroscopic analysis by FT-IR, mass spectrometry, and NMR 1H and 13C confirmed the structure of the parasulfonated derivative of Thymol: the 4-hydroxy-5-isopropyl-2-methylbenzenesulfonic acid. An optimization study was carried out to perform and improve the yield of this new para-sulfonation method by studying the effect of three parameters: temperature, the molar ratio (η) of the reactants, and solvents. The obtained results showed that the use of cyclohexane as a solvent, a molar ratio greater or equal than 3, and working under low temperatures increase the yield of this parasulfonation considerably to reach adequately 91.3%.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"49 1","pages":"547-552"},"PeriodicalIF":0.0,"publicationDate":"2020-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81556415","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 : 2020-05-26DOI: 10.13171/mjc10502005261409hi
B. Guerrouj, M. Bouhrim, N. Bencheikh, Hamada Imtara, Loubna Kharchoufa, Hayat Ouassou, Y. Bentata, M. Daudon, M. Melhaoui
Abstract : Renal lithiasis is a common disease in the eastern region of Morocco, as it threatens the public health because of its repetitive nature as well as the complications it can cause in the kidney. Objective : This study aims to investigate the morphological, molecular, and crystallographic characteristics of kidney stones affecting patients, specifically in the eastern region of Morocco. Methods : Morphological and constitutional analyses of 239 renal lithiases made it possible to identify the various crystalline forms present, to assess the structure of the stones and to determine the composition of their nucleation zone. Results : It appears that calcium oxalate is the main component of the analyzed stones. It represents 70.5 % of the stones, which 55.5 % are majority whewellite and 15 % in weddellite. In comparison, calcium phosphates and magnesium (carbapatite and struvite) are the majority in only 8.9 % of cases, uric acid in 19.8 % of stones, and ammonium acid urate in 0.8 %. Calcium oxalate is predominant in the core of 52.5 % of the stones, carbapatite in 24.1 %, and uric acid in 20.3 % and struvite in 2.9 %. Most of the stones analyzed consist of a mixture of different crystalline constituents. Only 9.3 % of the stones analyzed have a homogeneous composition. Several types of associations were identified, the main ones being whewellite-carbapatite and whewellite-weddellite-carbapatite. Conclusion : The present study shows that calcium oxalate is the most common compound in the samples studied, followed by the uric acid compound.
{"title":"Morphological and crystallographic analysis of kidney stones in Eastern Morocco","authors":"B. Guerrouj, M. Bouhrim, N. Bencheikh, Hamada Imtara, Loubna Kharchoufa, Hayat Ouassou, Y. Bentata, M. Daudon, M. Melhaoui","doi":"10.13171/mjc10502005261409hi","DOIUrl":"https://doi.org/10.13171/mjc10502005261409hi","url":null,"abstract":"Abstract : Renal lithiasis is a common disease in the eastern region of Morocco, as it threatens the public health because of its repetitive nature as well as the complications it can cause in the kidney. Objective : This study aims to investigate the morphological, molecular, and crystallographic characteristics of kidney stones affecting patients, specifically in the eastern region of Morocco. Methods : Morphological and constitutional analyses of 239 renal lithiases made it possible to identify the various crystalline forms present, to assess the structure of the stones and to determine the composition of their nucleation zone. Results : It appears that calcium oxalate is the main component of the analyzed stones. It represents 70.5 % of the stones, which 55.5 % are majority whewellite and 15 % in weddellite. In comparison, calcium phosphates and magnesium (carbapatite and struvite) are the majority in only 8.9 % of cases, uric acid in 19.8 % of stones, and ammonium acid urate in 0.8 %. Calcium oxalate is predominant in the core of 52.5 % of the stones, carbapatite in 24.1 %, and uric acid in 20.3 % and struvite in 2.9 %. Most of the stones analyzed consist of a mixture of different crystalline constituents. Only 9.3 % of the stones analyzed have a homogeneous composition. Several types of associations were identified, the main ones being whewellite-carbapatite and whewellite-weddellite-carbapatite. Conclusion : The present study shows that calcium oxalate is the most common compound in the samples studied, followed by the uric acid compound.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"5 1","pages":"539-546"},"PeriodicalIF":0.0,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74219084","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 : 2020-05-22DOI: 10.13171/mjc10502005221429nb
Sanaa Elhamidi, W. Boumya, R. Hammal, M. Moumou, Asmaa Ben Naji, Sadiq Mhamed, A. Chekroun, A. Benharref, Noureddine Barka, M. Abdennouri
The chemoselectivity and stereospecificity of the addition of the morpholine and the meta-chloroperoxybenzoic acid ( m-CPBA) onto 9α-hydroxyparthenolide were studied using Density Functional Theory (DFT) calculations with the B3LYP/6-311+G(d,p) computational level within the Molecular Electron Density Theory (MEDT), to demonstrate the key role of the Global Electron Density Transfer (GEDT) and to examine the polar character of these reactions. This work is divided into two parts; the first part concerns the reaction between the morpholine and the 9α-hydroxyparthenolide. The second part deals with the epoxidation of the 9α-hydroxyparthenolide by m-CPBA followed by the addition of the morpholine to the major product resulting from the epoxidation step. The obtained results show that the reaction between the morpholine and the 9α-hydroxyparthenolide takes place on the double bond C 3 =C 4 . On the other hand, when 9α-hydroxyparthenolide is attacked by m-CPBA, the epoxidation reaction is carried out on the double bond C 1 =C 2 .
{"title":"A regio- and stereoselectivity and molecular mechanism study on the addition reactions of morpholine and m-CPBA to 9α-hydroxyparthenolide using DFT calculations","authors":"Sanaa Elhamidi, W. Boumya, R. Hammal, M. Moumou, Asmaa Ben Naji, Sadiq Mhamed, A. Chekroun, A. Benharref, Noureddine Barka, M. Abdennouri","doi":"10.13171/mjc10502005221429nb","DOIUrl":"https://doi.org/10.13171/mjc10502005221429nb","url":null,"abstract":"The chemoselectivity and stereospecificity of the addition of the morpholine and the meta-chloroperoxybenzoic acid ( m-CPBA) onto 9α-hydroxyparthenolide were studied using Density Functional Theory (DFT) calculations with the B3LYP/6-311+G(d,p) computational level within the Molecular Electron Density Theory (MEDT), to demonstrate the key role of the Global Electron Density Transfer (GEDT) and to examine the polar character of these reactions. This work is divided into two parts; the first part concerns the reaction between the morpholine and the 9α-hydroxyparthenolide. The second part deals with the epoxidation of the 9α-hydroxyparthenolide by m-CPBA followed by the addition of the morpholine to the major product resulting from the epoxidation step. The obtained results show that the reaction between the morpholine and the 9α-hydroxyparthenolide takes place on the double bond C 3 =C 4 . On the other hand, when 9α-hydroxyparthenolide is attacked by m-CPBA, the epoxidation reaction is carried out on the double bond C 1 =C 2 .","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"54 1","pages":"527-538"},"PeriodicalIF":0.0,"publicationDate":"2020-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82168997","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 : 2020-05-20DOI: 10.13171/MJC10502005201345BM
B. Mellah, T. Turki, W. Chammam, E. Srasra
Hybrids (H) prepared from 8-Hydroxyquinoline (8-HQ, "oxine") and exchanged montmorillonites (Na(I)-, Zn(II)- and Fe(III)-Mont) have been synthesized using solid-solid reactions at room temperature. The characterization of these hybrids by PPXRD has shown that the interlayer spaces swell (from 0.22 to 1.10 A of d 001 differences) after the inclusion of 8-HQ due to its complexation with the cations present. In the IR spectra, new bands corresponding to 8-HQ groups, appear in the regions 1244 - 1608 cm -1 and 574 - 826 cm -1 . DSC measurement has shown the hybrids to be more stable than the precursor montmorillonites, 8-HQ and the simple metal oxinates. Zeta potential measurement on suspensions of the hybrids showed them to be negatively charged over the whole pH range (pH=2-10). As an application of our elaborated hybrids, sorption of the cationic dye methylene blue MB (C MB =200 mg.L -1 ) by the Na(I)-, Zn(II)- and Fe(III)-hybrids has been found to be rapid for the first two. At the same time, for the Fe(III) species, one month of sedimentation was required to adsorb 87 % of MB. The structural characterization of multi-hybrids MH (H+MB) by PXRD has shown a shift of d 001 to higher values (Na-MH: 15.32 A; Zn-MH: 16.61 A; Fe-MH: 16.99 A), signifying the intercalation of MB into interlayer spaces.
{"title":"Synthesis of 8-Hydroxyquinoline/exchanged montmorillonite hybrids: Sorption, Luminescence and Thermal stability studies","authors":"B. Mellah, T. Turki, W. Chammam, E. Srasra","doi":"10.13171/MJC10502005201345BM","DOIUrl":"https://doi.org/10.13171/MJC10502005201345BM","url":null,"abstract":"Hybrids (H) prepared from 8-Hydroxyquinoline (8-HQ, \"oxine\") and exchanged montmorillonites (Na(I)-, Zn(II)- and Fe(III)-Mont) have been synthesized using solid-solid reactions at room temperature. The characterization of these hybrids by PPXRD has shown that the interlayer spaces swell (from 0.22 to 1.10 A of d 001 differences) after the inclusion of 8-HQ due to its complexation with the cations present. In the IR spectra, new bands corresponding to 8-HQ groups, appear in the regions 1244 - 1608 cm -1 and 574 - 826 cm -1 . DSC measurement has shown the hybrids to be more stable than the precursor montmorillonites, 8-HQ and the simple metal oxinates. Zeta potential measurement on suspensions of the hybrids showed them to be negatively charged over the whole pH range (pH=2-10). As an application of our elaborated hybrids, sorption of the cationic dye methylene blue MB (C MB =200 mg.L -1 ) by the Na(I)-, Zn(II)- and Fe(III)-hybrids has been found to be rapid for the first two. At the same time, for the Fe(III) species, one month of sedimentation was required to adsorb 87 % of MB. The structural characterization of multi-hybrids MH (H+MB) by PXRD has shown a shift of d 001 to higher values (Na-MH: 15.32 A; Zn-MH: 16.61 A; Fe-MH: 16.99 A), signifying the intercalation of MB into interlayer spaces.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"1 1","pages":"516-526"},"PeriodicalIF":0.0,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86419004","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 : 2020-05-18DOI: 10.13171/mjc10502005181406rm
R. Mghaiouini, A. Elmlouky, R. E. Moznine, M. Monkade, A. Bouari
This paper presents an experimental study to investigate the effect of using the electromagnetic field on the electric conductivity and dielectric properties of treated tap water by aqua 4 D system according to the time of exposition in a closed water circulation circuit. There is a portion where there is an electromagnetic field obtained by the electromagnetic device. This work includes tap water circulation in the region of the electromagnetic field for 5 min, 10, 15, 20 min. The dielectric and electrical properties were examined and analyzed using the technique impedance spectroscopy in the frequency range going from 0.1 Hz to 1 MHz.To initiate the phenomena involving water after magnetization with the electromagnetic field. The results clearly show that the magnetic field reduces the dielectric constant and resistance of water and increase its electric conductivity. In this study, we also find that the electrical conductivity of magnetized water increases.
{"title":"The influence of the electromagnetic field on the electric properties of water","authors":"R. Mghaiouini, A. Elmlouky, R. E. Moznine, M. Monkade, A. Bouari","doi":"10.13171/mjc10502005181406rm","DOIUrl":"https://doi.org/10.13171/mjc10502005181406rm","url":null,"abstract":"This paper presents an experimental study to investigate the effect of using the electromagnetic field on the electric conductivity and dielectric properties of treated tap water by aqua 4 D system according to the time of exposition in a closed water circulation circuit. There is a portion where there is an electromagnetic field obtained by the electromagnetic device. This work includes tap water circulation in the region of the electromagnetic field for 5 min, 10, 15, 20 min. The dielectric and electrical properties were examined and analyzed using the technique impedance spectroscopy in the frequency range going from 0.1 Hz to 1 MHz.To initiate the phenomena involving water after magnetization with the electromagnetic field. The results clearly show that the magnetic field reduces the dielectric constant and resistance of water and increase its electric conductivity. In this study, we also find that the electrical conductivity of magnetized water increases.","PeriodicalId":18513,"journal":{"name":"Mediterranean Journal of Chemistry","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89807906","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 : 2020-05-17DOI: 10.13171/mjc10502005171436rc
Benjamin Brandes, Sophie Hoenke, H. Deigner, R. Csuk
Analysis of several batches of the a 1 –adrenergic blocking agent terazosin being used as a medication for treating benign prostatic hyperplasia and hypertension revealed the presence of a hitherto not reported impurity. The latter was isolated, and its structure was elucidated from NMR and Mass Spectrometry (MS) data and unambiguously confirmed by independent synthesis. This contamination, represented in 1-[4-(amino-6,7-dimethoxyquinazolin-2-yl)-piperazin-1-yl]-pentane-1,2-dione 2 is likely to occur as the product of a side-reaction in the catalytic hydrogenation step during the synthesis of the drug. Biological screening showed this compound as not cytotoxic for several human tumor cell lines and non-malignant fibroblasts.
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