Pub Date : 2021-01-01DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.18310
K. Essifi, Mohammed Nor, Doha Berraaouan, El Houssien Akichouh, Ali. El, Bachiri, A. Challioui, A. Tahani
The modification of the clays (montmorillonite) by surfactants finds several applications in various fields, such as cosmetics, drugs, nanomaterials, etc. The experimental and the simulation of the adsorption of the cetylpyridinium surfactant on a Moroccan Na-Montmorillonite-type clay surface have been investigated. The adsorption rate of cetylpyridinium reached 2 CEC (Cation Exchange Capacity) and the maximum amount of adsorption increases for co-ion Br - more than Cl - . These results have been proven and we can conclude that the amount of adsorption varies according to the surfactant critical micelle concentration (CMC). The simulation shows the arrangement of the cationic surfactant’s ions adsorbed on the basal surface. Where the cetylpyridinium are organized in two layers in a bimolecular and paraffinic manner. The binding coefficients for the formation of neutral complexes of either cationic surfactant’s ions and the clay are calculated by a theoretical model and the binding force of the cationic surfactant ion on the surface of the clay depends on the co-ion. The FT-IR and XRD analyses showed that the surfactant is in strong interaction with montmorillonite for a surfactant adsorption rate lower than the CEC, and that the orientation of the surfactant molecules on the surface of the clay changes with the amount adsorbed to CP-Cl, especially for an adsorbed amount greater than the CEC.
{"title":"Identification and quantification of the adsorption mechanisms of the cationic surfactant the cetylpyridinium chloride on Moroccan Na-montmorillonite","authors":"K. Essifi, Mohammed Nor, Doha Berraaouan, El Houssien Akichouh, Ali. El, Bachiri, A. Challioui, A. Tahani","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.18310","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.18310","url":null,"abstract":"The modification of the clays (montmorillonite) by surfactants finds several applications in various fields, such as cosmetics, drugs, nanomaterials, etc. The experimental and the simulation of the adsorption of the cetylpyridinium surfactant on a Moroccan Na-Montmorillonite-type clay surface have been investigated. The adsorption rate of cetylpyridinium reached 2 CEC (Cation Exchange Capacity) and the maximum amount of adsorption increases for co-ion Br - more than Cl - . These results have been proven and we can conclude that the amount of adsorption varies according to the surfactant critical micelle concentration (CMC). The simulation shows the arrangement of the cationic surfactant’s ions adsorbed on the basal surface. Where the cetylpyridinium are organized in two layers in a bimolecular and paraffinic manner. The binding coefficients for the formation of neutral complexes of either cationic surfactant’s ions and the clay are calculated by a theoretical model and the binding force of the cationic surfactant ion on the surface of the clay depends on the co-ion. The FT-IR and XRD analyses showed that the surfactant is in strong interaction with montmorillonite for a surfactant adsorption rate lower than the CEC, and that the orientation of the surfactant molecules on the surface of the clay changes with the amount adsorbed to CP-Cl, especially for an adsorbed amount greater than the CEC.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":"9 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70567223","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 : 2021-01-01DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.19155
Taghavi deilamani
Microfilament polyester yarns are one of the most important and widely used yarns in the textile industry and the fabrics produced from these yarns have a large consumption. One of the most important issues regarding fabrics made from Microfilament yarns is the issue of dyeing and dyeing properties of these fabrics. Among the concerns of DTY polyester yarn manufacturers are the conditions for producing and texturizing these fibers. Choosing the right range for each of the effective parameters in the false twist texturing machines will play a major role in the physical properties, dyeing Characteristic and color properties of the yarn produced. In this paper, we attempt to study the effect of the most important texturing parameters by false twist method: first heater temperature, draw ratio, D/Y rate and texturing speed on some of the most important color properties of microfilament polyester yarn that dyeing with dispersant dyestuff. These properties include color reflectance (% R), color strength (K/S), amount of dye absorbed ( ) and absorbance number (A). Experiments are designed using ANOVA and Response Surface Methodology (RSM) method. The effect of changes in the main texturing parameters on the color coordinates of the microfilament polyester yarn is studied. The POY yarn used in this study is polyester yarn with a count of 135 dtex and 144 filaments. According to the studies, the interaction between the first heater temperature and the D / Y rate as well as the interaction between the draw ratio and the D / Y rate will have the greatest effect on the color strength and color properties of the microfilament polyester yarn.
{"title":"Statistical Investigation of the Effect of Major Parameters of False Twist Texturing on the Dyeing Characteristic and Color Properties of Microfilament Polyester Yarn","authors":"Taghavi deilamani","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.19155","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.19155","url":null,"abstract":"Microfilament polyester yarns are one of the most important and widely used yarns in the textile industry and the fabrics produced from these yarns have a large consumption. One of the most important issues regarding fabrics made from Microfilament yarns is the issue of dyeing and dyeing properties of these fabrics. Among the concerns of DTY polyester yarn manufacturers are the conditions for producing and texturizing these fibers. Choosing the right range for each of the effective parameters in the false twist texturing machines will play a major role in the physical properties, dyeing Characteristic and color properties of the yarn produced. In this paper, we attempt to study the effect of the most important texturing parameters by false twist method: first heater temperature, draw ratio, D/Y rate and texturing speed on some of the most important color properties of microfilament polyester yarn that dyeing with dispersant dyestuff. These properties include color reflectance (% R), color strength (K/S), amount of dye absorbed ( ) and absorbance number (A). Experiments are designed using ANOVA and Response Surface Methodology (RSM) method. The effect of changes in the main texturing parameters on the color coordinates of the microfilament polyester yarn is studied. The POY yarn used in this study is polyester yarn with a count of 135 dtex and 144 filaments. According to the studies, the interaction between the first heater temperature and the D / Y rate as well as the interaction between the draw ratio and the D / Y rate will have the greatest effect on the color strength and color properties of the microfilament polyester yarn.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":"9 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70567293","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 : 2021-01-01DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I1.19674
Van Thanh Tien Nguyen, T. Nguyen, T. Tran, T. Le, Ngoc‐Hong Nguyen
In this study, eggshell powder-chitosan gel (EPCG) material was synthesized and tested as an adsorbent for two commercial reactive dyes in batch and dynamic modes. The EPCG material was a novel core-shell material in which the eggshell core particles were coated by a thin layer of chitosan. SEM images of dried EPCG powder showed a porous structure of the surface. In adsorption batch tests, Langmuir and Freundlich equations well described the adsorption isotherms with a maximum capacity of 2.3 mg/g at pH 4 and equilibrium time of 60 min (r 2 > 0.98). The adsorption process followed pseudo-second-order kinetics. Adsorption behaviour of EPCG toward the reactive dyes in fixed-bed adsorber was better described by the Clark model (r 2 > 0.92) than by the Bohart – Adam model (r 2 > 0.82). These results suggest that EPCG, as an environment-friendly material produced from waste eggshell, is very promising for wastewater treatment applications.
{"title":"Batch and column adsorption of reactive dye by eggshell powder–chitosan gel core-shell material","authors":"Van Thanh Tien Nguyen, T. Nguyen, T. Tran, T. Le, Ngoc‐Hong Nguyen","doi":"10.48317/IMIST.PRSM/MORJCHEM-V9I1.19674","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V9I1.19674","url":null,"abstract":"In this study, eggshell powder-chitosan gel (EPCG) material was synthesized and tested as an adsorbent for two commercial reactive dyes in batch and dynamic modes. The EPCG material was a novel core-shell material in which the eggshell core particles were coated by a thin layer of chitosan. SEM images of dried EPCG powder showed a porous structure of the surface. In adsorption batch tests, Langmuir and Freundlich equations well described the adsorption isotherms with a maximum capacity of 2.3 mg/g at pH 4 and equilibrium time of 60 min (r 2 > 0.98). The adsorption process followed pseudo-second-order kinetics. Adsorption behaviour of EPCG toward the reactive dyes in fixed-bed adsorber was better described by the Clark model (r 2 > 0.92) than by the Bohart – Adam model (r 2 > 0.82). These results suggest that EPCG, as an environment-friendly material produced from waste eggshell, is very promising for wastewater treatment applications.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":"8 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70567547","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 : 2020-09-21DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.22217
A. Boshaala, K. AlFarhan, H. M. Sheppaek, W. O. Algezzeri, A. Zarrouk, I. Warad
The reaction of S-benzyldithiocarbazate with 4-chloroacetophenone afforded bidentate NS Schiff base (S.B) S-benzyl-β-N-(1-(4-chlorophenyl)ethylidene) dithiocarbazate, the thione tautomeric is very interesting, usually such Schiff base chelated to the metal center through neutral nitrogen at in the azomethine and the ionic sulfur of the thiol. The ligand structure has been confirmed by FT-IR, FAB-MS, UV-vis, PXRD and XRD-crystal. The main target of this work is to compare the XRD-interactions with the computed result of Hirshfeld surface analysis (HSA). Both HSA and XRD reflected the presence of the NH…S=C and CH….S=C. H-bonds as main interactions forces in crystal lattice of the desired ligand.
s -苄基二硫代氨基甲酸酯与4-氯苯乙酮反应产生双齿状NS席夫碱(s -b) s -苄基-β- n -(1-(4-氯苯基)乙基)二硫代氨基甲酸酯，这种硫酮互变异构体非常有趣，通常这种席夫碱通过偶亚甲基中的中性氮和硫醇的离子硫螯合到金属中心。通过FT-IR、FAB-MS、UV-vis、PXRD和xrd晶体对配体结构进行了表征。本工作的主要目的是将xrd相互作用与Hirshfeld表面分析(HSA)计算结果进行比较。HSA和XRD均反映了NH…S=C和CH....S=C的存在。氢键是配体晶格中的主要相互作用力。
{"title":"Crystal interaction, XRD powder, and Hirshfeld surface analysis of S-benzyl-β-N-(1-(4-chlorophenyl) ethylidene) dithiocarbazate Schiff base","authors":"A. Boshaala, K. AlFarhan, H. M. Sheppaek, W. O. Algezzeri, A. Zarrouk, I. Warad","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.22217","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.22217","url":null,"abstract":"The reaction of S-benzyldithiocarbazate with 4-chloroacetophenone afforded bidentate NS Schiff base (S.B) S-benzyl-β-N-(1-(4-chlorophenyl)ethylidene) dithiocarbazate, the thione tautomeric is very interesting, usually such Schiff base chelated to the metal center through neutral nitrogen at in the azomethine and the ionic sulfur of the thiol. The ligand structure has been confirmed by FT-IR, FAB-MS, UV-vis, PXRD and XRD-crystal. The main target of this work is to compare the XRD-interactions with the computed result of Hirshfeld surface analysis (HSA). Both HSA and XRD reflected the presence of the NH…S=C and CH….S=C. H-bonds as main interactions forces in crystal lattice of the desired ligand.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42372211","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 : 2020-09-17DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.20915
A. Cherrat, M. Bettach, Y. Ennaciri, H. E. Alaoui-Belghiti, K. Benkhouja
The phosphorus-nitrogen fertilizer family improves the availability of phosphorus and nitrogen for efficient crop growth. Urea phosphate 17-44-0 (N-P 2 O 5 -K 2 O%) is considered as a binary fertilizer characterized by its high purity and it is easily soluble in water. In addition, urea phosphate can be used in other fields as a high-quality food additive, finishing agent for metals and fermentation food. As a fertilizer, it is suitable for alkaline soils. In this work, a new process for the synthesis of urea phosphate by the wet route is developed. It consists in directly producing crystalline urea phosphate by the chemical reaction between Moroccan industrial phosphoric acid (54 % P 2 O 5 ) and solid urea (46 %). The synthesis is carried out by mixing the solid urea with a stoichiometric amount of untreated Moroccan industrial phosphoric acid. The chemical reaction is complete for optimal conditions which are a temperature of 50 °C and a duration of 90 min. After cooling, the urea phosphate crystals are formed without any additional treatment and are easily recovered. Analysis of the residual liquor after recovery of the urea phosphate crystals confirms that the majority of impurities which may be harmful to the environment pass into the liquid phase
{"title":"Wet synthesis of high purity crystalline urea phosphate from untreated Moroccan industrial phosphoric acid","authors":"A. Cherrat, M. Bettach, Y. Ennaciri, H. E. Alaoui-Belghiti, K. Benkhouja","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.20915","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.20915","url":null,"abstract":"The phosphorus-nitrogen fertilizer family improves the availability of phosphorus and nitrogen for efficient crop growth. Urea phosphate 17-44-0 (N-P 2 O 5 -K 2 O%) is considered as a binary fertilizer characterized by its high purity and it is easily soluble in water. In addition, urea phosphate can be used in other fields as a high-quality food additive, finishing agent for metals and fermentation food. As a fertilizer, it is suitable for alkaline soils. In this work, a new process for the synthesis of urea phosphate by the wet route is developed. It consists in directly producing crystalline urea phosphate by the chemical reaction between Moroccan industrial phosphoric acid (54 % P 2 O 5 ) and solid urea (46 %). The synthesis is carried out by mixing the solid urea with a stoichiometric amount of untreated Moroccan industrial phosphoric acid. The chemical reaction is complete for optimal conditions which are a temperature of 50 °C and a duration of 90 min. After cooling, the urea phosphate crystals are formed without any additional treatment and are easily recovered. Analysis of the residual liquor after recovery of the urea phosphate crystals confirms that the majority of impurities which may be harmful to the environment pass into the liquid phase","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45252434","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 : 2020-09-17DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.22364
J. Assaoui, A. Kheribech, L. Khamliche, R. Brahmi, Z. Hatim
Adsorption potential of Moroccan sodium bentonite clay was investigated for aqueous solution defluoridation using batch equilibrium experiments. The aim of this study was to evaluate the adsorption potential of the natural sodium bentonite clay for fluoride removal from aqueous solution and to explore the mechanism that might occur in the fluoride adsorption process. The compositional, structural and textural characteristics of the natural sodium bentonite clay were determined using accurate physicochemical and mineralogical characterizations. The contents of fluoride ions in aqueous solution were determined by the potentiometric method with a fluoride-specific ion electrode connected to a digital ion analyzer. The study and optimization of various operational parameters such as contact time, initial fluoride concentration, adsorbent dose and initial pH solution were carried out through batch adsorption experiments, conducted at room temperature. The experiments results showed that 30 min of contact time was sufficient for attaining equilibrium between the liquid and solid phases. The maximum aqueous solution defluoridation was noted to be 52.2% in the acidic conditions, and for 5 mg L -1 and 2 g L -1 of initial fluoride concentration and adsorbent dose, respectively. The experimental data followed pseudo-second-order and fitted well into Freundlich adsorption, indicating multilayer adsorption with heterogeneous energetic distribution of active sites
{"title":"Study of the adsorption of fluoride in aqueous solution by eco-friendly cost-effective adsorbent: characterization and adsorption mechanism","authors":"J. Assaoui, A. Kheribech, L. Khamliche, R. Brahmi, Z. Hatim","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.22364","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.22364","url":null,"abstract":"Adsorption potential of Moroccan sodium bentonite clay was investigated for aqueous solution defluoridation using batch equilibrium experiments. The aim of this study was to evaluate the adsorption potential of the natural sodium bentonite clay for fluoride removal from aqueous solution and to explore the mechanism that might occur in the fluoride adsorption process. The compositional, structural and textural characteristics of the natural sodium bentonite clay were determined using accurate physicochemical and mineralogical characterizations. The contents of fluoride ions in aqueous solution were determined by the potentiometric method with a fluoride-specific ion electrode connected to a digital ion analyzer. The study and optimization of various operational parameters such as contact time, initial fluoride concentration, adsorbent dose and initial pH solution were carried out through batch adsorption experiments, conducted at room temperature. The experiments results showed that 30 min of contact time was sufficient for attaining equilibrium between the liquid and solid phases. The maximum aqueous solution defluoridation was noted to be 52.2% in the acidic conditions, and for 5 mg L -1 and 2 g L -1 of initial fluoride concentration and adsorbent dose, respectively. The experimental data followed pseudo-second-order and fitted well into Freundlich adsorption, indicating multilayer adsorption with heterogeneous energetic distribution of active sites","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49571992","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 : 2020-09-06DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.20867
F. Gashi, Fisnik Laha, Naser Troni, H. Çadraku, A. Maxhuni
The purpose of this research study is to determine the concentrations of heavy metals in sediments (fraction Mn>Zn>Ni>Cr>Cu>Pb>Co>As>Sn>Mo>Sb>Cd>Bi>Ag>Hg. Based on the findings from this study, studied area is directly impacted from the geological constitution of rocks (clastic, alluvium, proluvium, glacigene, calc tufa/travertine and lake sediments) and there is a minor influence by the human activity (in the case of iron concentration level).
{"title":"Evaluation of sediments quality and geospatial distribution of heavy metals in aquatic sources in the Drini i Bardhë river basin.","authors":"F. Gashi, Fisnik Laha, Naser Troni, H. Çadraku, A. Maxhuni","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.20867","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.20867","url":null,"abstract":"The purpose of this research study is to determine the concentrations of heavy metals in sediments (fraction Mn>Zn>Ni>Cr>Cu>Pb>Co>As>Sn>Mo>Sb>Cd>Bi>Ag>Hg. Based on the findings from this study, studied area is directly impacted from the geological constitution of rocks (clastic, alluvium, proluvium, glacigene, calc tufa/travertine and lake sediments) and there is a minor influence by the human activity (in the case of iron concentration level).","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45984000","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 : 2020-08-07DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.22304
Y. Zhou, J. Chen, N. Miloserdov, W. Z. K. J. Mintz, B. Ferreira, M. Micic, S. Li, Z. Peng, R. Leblanc
With constant emergencies and severe consequences of various central nervous system (CNS)-related diseases, drug delivery gradually reveals its significance in the modern medicine. The biggest challenge of drug delivery resides in the selection of appropriate drug delivery carrier. 21 th century witnessed the prosperous development of diverse nanomaterials. Due to many excellent properties revealed in nanoscale, nanomaterials have been widely investigated as drug nanocarriers. As a new family member of carbon-based nanomaterials, carbon dots (CDs) have proved to be promising drug nanocarriers. They have been successfully conjugated with various therapeutic agents for targeted drug delivery. However, considering the limitation of single CD preparation in drug delivery, in this study, two distinct CD preparations (G-CDs and Y-CDs) were conjugated to compensate for each other’s deficiencies. Different dialysis bags were employed to purify the CD conjugate (G-Y CDs) and reveal the difference between small and large-conjugated systems. After a series of physicochemical characterizations, G-Y CDs exhibited many nanocarrier-favored properties such as excitation-dependent photoluminescence (PL), diversified surface functionality, controlled morphology and versatile amphiphilicity. To further analyze the formation mechanism of G-Y CDs, self-conjugation was separately surveyed with G-CDs and Y-CDs, which showed that self-conjugation was able to occur between Y-CDs. Eventually, to evaluate the capacity of G-Y CDs as drug nanocarriers for future CNS-related diseases, G-Y CDs were intravascularly injected into the heart of zebrafish. The fluorescence signal in the spinal cord suggested the capability of G-Y CDs to cross the blood-brain barrier (BBB). Therefore, this study reveals a novel strategy to assemble versatile drug nanocarriers through conjugation of distinct CDs.
{"title":"Versatile drug nanocarrier assembly via conjugation of distinct carbon dots","authors":"Y. Zhou, J. Chen, N. Miloserdov, W. Z. K. J. Mintz, B. Ferreira, M. Micic, S. Li, Z. Peng, R. Leblanc","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.22304","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.22304","url":null,"abstract":"With constant emergencies and severe consequences of various central nervous system (CNS)-related diseases, drug delivery gradually reveals its significance in the modern medicine. The biggest challenge of drug delivery resides in the selection of appropriate drug delivery carrier. 21 th century witnessed the prosperous development of diverse nanomaterials. Due to many excellent properties revealed in nanoscale, nanomaterials have been widely investigated as drug nanocarriers. As a new family member of carbon-based nanomaterials, carbon dots (CDs) have proved to be promising drug nanocarriers. They have been successfully conjugated with various therapeutic agents for targeted drug delivery. However, considering the limitation of single CD preparation in drug delivery, in this study, two distinct CD preparations (G-CDs and Y-CDs) were conjugated to compensate for each other’s deficiencies. Different dialysis bags were employed to purify the CD conjugate (G-Y CDs) and reveal the difference between small and large-conjugated systems. After a series of physicochemical characterizations, G-Y CDs exhibited many nanocarrier-favored properties such as excitation-dependent photoluminescence (PL), diversified surface functionality, controlled morphology and versatile amphiphilicity. To further analyze the formation mechanism of G-Y CDs, self-conjugation was separately surveyed with G-CDs and Y-CDs, which showed that self-conjugation was able to occur between Y-CDs. Eventually, to evaluate the capacity of G-Y CDs as drug nanocarriers for future CNS-related diseases, G-Y CDs were intravascularly injected into the heart of zebrafish. The fluorescence signal in the spinal cord suggested the capability of G-Y CDs to cross the blood-brain barrier (BBB). Therefore, this study reveals a novel strategy to assemble versatile drug nanocarriers through conjugation of distinct CDs.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49454191","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 : 2020-08-06DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.20562
A. Bouchtart, M. Rguiti, K. E. Mouaden, A. Albourine, A. Chaouiki, R. Ralghi, L. Bazzi, A. Chetouani
Four heteroatom organic compounds (HAC) such as L-methionine (Meth), L-Cysteine (Syst), Phenyl MercaptoTetrazol (PMT) and Glutamic acid (GA) were evaluated as corrosion inhibitors for mild steel in 1M acetic acid (AcA) solution. The technique used are potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), UV-Vis spectroscopy analysisand scanning electron microscopy (SEM). As a comparative study results, the corrosion inhibitor rankings were: Meth ˂ Cyst ˂ PMT ˂ GA. Furthermore, the GA was the best inhibitors against mild steel corrosion and provided an inhibition efficiency of 74% at 10 -4 M. For this reason, we have besides studied the GA concentration and immersion time on the performance delivered by GA. In this way, it is affirmed that the inhibition efficiency was well improved with the GA concentration increasing. In addition, the GA is a good corrosion inhibitor even with long durations.
{"title":"Mild steel corrosion inhibition by some heteroatom organic compounds in acetic acid medium","authors":"A. Bouchtart, M. Rguiti, K. E. Mouaden, A. Albourine, A. Chaouiki, R. Ralghi, L. Bazzi, A. Chetouani","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.20562","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.20562","url":null,"abstract":"Four heteroatom organic compounds (HAC) such as L-methionine (Meth), L-Cysteine (Syst), Phenyl MercaptoTetrazol (PMT) and Glutamic acid (GA) were evaluated as corrosion inhibitors for mild steel in 1M acetic acid (AcA) solution. The technique used are potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), UV-Vis spectroscopy analysisand scanning electron microscopy (SEM). As a comparative study results, the corrosion inhibitor rankings were: Meth ˂ Cyst ˂ PMT ˂ GA. Furthermore, the GA was the best inhibitors against mild steel corrosion and provided an inhibition efficiency of 74% at 10 -4 M. For this reason, we have besides studied the GA concentration and immersion time on the performance delivered by GA. In this way, it is affirmed that the inhibition efficiency was well improved with the GA concentration increasing. In addition, the GA is a good corrosion inhibitor even with long durations.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46182765","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 : 2020-08-05DOI: 10.48317/IMIST.PRSM/MORJCHEM-V8I4.21728
L. Mahardiani, Andri Ashadi, S. Saputro, N. Y. Indriyanti, M. Taufiq
The removal of organic pollutant from aqueous solution was carried out by using modified activated carbon surface. Activated carbon was modified using chemical and physical treatment, such as using oxidizing agent (HNO 3 ) and air oxidation, respectively. In this study, Rhodamine B was used as the organic pollutant. The results showed that activated carbon modified with air oxidation treatment rapidly attained the Rhodamine B adsorption after 30 minutes of contact time. Adsorption data are used for modelling, from the pseudo-first-order and pseudo-second-order kinetic equation and intra-particle diffusion models. The isotherm adsorption of Rhodamine B was fitted with Freundlich isotherm indicating that adsorption occurs on a heterogeneous surface through a multilayer adsorption mechanism. In addition, the intra-particle diffusion suggests that there were two stage mechanisms which contributed to the adsorption efficiency of Rhodamine B.
{"title":"The Removal of Organic Pollutant from Aqueous Solution by Modified Activated Carbon Surface","authors":"L. Mahardiani, Andri Ashadi, S. Saputro, N. Y. Indriyanti, M. Taufiq","doi":"10.48317/IMIST.PRSM/MORJCHEM-V8I4.21728","DOIUrl":"https://doi.org/10.48317/IMIST.PRSM/MORJCHEM-V8I4.21728","url":null,"abstract":"The removal of organic pollutant from aqueous solution was carried out by using modified activated carbon surface. Activated carbon was modified using chemical and physical treatment, such as using oxidizing agent (HNO 3 ) and air oxidation, respectively. In this study, Rhodamine B was used as the organic pollutant. The results showed that activated carbon modified with air oxidation treatment rapidly attained the Rhodamine B adsorption after 30 minutes of contact time. Adsorption data are used for modelling, from the pseudo-first-order and pseudo-second-order kinetic equation and intra-particle diffusion models. The isotherm adsorption of Rhodamine B was fitted with Freundlich isotherm indicating that adsorption occurs on a heterogeneous surface through a multilayer adsorption mechanism. In addition, the intra-particle diffusion suggests that there were two stage mechanisms which contributed to the adsorption efficiency of Rhodamine B.","PeriodicalId":18768,"journal":{"name":"Moroccan Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2020-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49457274","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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