International Research Journal of Pure and Applied Chemistry最新文献

{"title":"Kinetic Study of Sodium Dodecylsulfate Degradation by Solar Heterogeneous Photocatalysis Based on Tungsten Oxide","authors":"Djedjess Essoh Jules-César Meledje, Y. A. Yobouet, Ange Victoire Mireille Loua, A. S. Ello, S. N. Eroi, Albert Trokourey","doi":"10.9734/irjpac/2024/v25i2850","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i2850","url":null,"abstract":"Sodium Dodecyl Sulfate or SDS is a chemical compound widely used in detergent and cosmetic formulations. This work describes the application of solar heterogeneous photocatalysis based on tungsten oxide (WO3) to the kinetic study of the degradation of sodium dodecylsulfate. The experiments were performed at room temperature to study the effect of the initial catalyst mass. The results showed that a small amount of tungsten oxide is sufficient to degrade sodium dodecyl sulfate. The initial concentrations of SDS varied between 5 and 15 mg.L-1. According to the results, more than 87% reduction is obtained after 120 min of solar irradiation of the SDS solution for a WO3/SDS mass ratio of 1/5. The detailed kinetic analysis of the photodegradation of sodium dodecylsulfate showed that the disappearance of the anionic surfactant follows a pseudo-prime model. According to the Langmuir-Hinshelwood model, the kinetics constant calculated from the linear form of this model are : k = 0.042 mg.L.min-1 and K = 0.060 L.mg-1.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"60 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367962","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}

{"title":"Investigation of Copper Codeposits with SiC Nano from Ionic Liquid (Ethaline) as Function of Concentration and Micro Particles Sizes where the Working Electrode in ‘Vertical’ Position Using Acoustic Impedance Electrochemical Quartz Crystal Microbalance (EQCM)","authors":"K. E. Ttaib, A. Benhmid","doi":"10.9734/irjpac/2024/v25i2849","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i2849","url":null,"abstract":"The gravimetric inspection of co-electrodeposited copper, with hard inert second phase ceramics SiC and 0.02 M [CuCl2.2H2O] in 1 ChCl: 2 EG, based liquid for different solution-phase loadings of 1-3 (mu)m silicon carbide unpolished gold AT cut working electrode placed in’Vertical’ position, revealed that the EQCM method admits the first in-situ quantification or particulate inclusion.  It was found that the composition of incorporated substance was fairly dependant on the concentration of second phase particles in solution, where in this study the 5% SiC has the amount in the copper which is in a good agreement with alumina particles with the same size.  Another observation was that most of the material was drawn onto the surface rather than settling on to it, however the distribution of the hard phase was found to be reasonably even throughout the coating.  This technology is important because it assists deposition of bright copper coatings without adding hazard materials, such as cyanide. On the other hand the comparison between concentrations of  0.02 M  and 0.2 M [CuCl2.2H2O] in 1 ChCl: 2 EG based liquid for 10% solution-phase loadings of 45-55 nm size silicon carbide was also investigated, where the working electrode is placed in’Horizontal’  postion. It is very interisting that the experimental result showed that the mass loaded by 0.2 M solution is about 10 times greater than for the mass loaded by 0.02 M solution.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"80 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376252","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}

{"title":"The Potential of Bentonite as a Low-cost Adsorbent for the Removal of Heavy Metal Ions from Multicomponent Aqueous Systems of the Galvanic Industry","authors":"Melisa Ahmetović, I. Šestan, A. Odobašić, Edisa Papraćanin, H. Keran, Abdel Đozić, Halid Junuzović","doi":"10.9734/irjpac/2024/v25i2848","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i2848","url":null,"abstract":"Waste water in the galvanic process contains high concentrations of heavy metals that pose a direct danger to humans and the environment. Conventional methods for their removal are quite expensive and generate a large amount of waste. The development of new and improvement of existing methods for the removal of heavy metals from galvanic wastewater are the subject of many studies.\u0000Compared to other purification methods, the adsorption is becoming an increasingly popular method of wastewater purification, especially if the adsorbent is cheap, easily available and does not require any other treatment before use. Therefore, the aim of the work was to investigate the possibility of using natural bentonite for the removal of heavy metal ions from multi-component water systems of the galvanic industry.\u0000For this purpose, the physico-chemical characterization of natural bentonite was performed, and then the influence of pH value, time and temperature on the adsorption efficiency was examined.\u0000The results of adsorption showed that natural bentonite can be used as an adsorbent for the removal of heavy metal ions from waste galvanic waters, and that at pH 5 it achieves the maximum removal efficiency for Cu(II):Cr(III):Ni(II) ions in the percentage ratio 100 : 99.990 : 99.998. The results showed that the highest removal efficiency for Cu (II) ions was achieved in the first 10 minutes, and 20 minutes for Cr (III) and Ni (II) ions. The maximum efficiency of Cu (II) removal was achieved at all temperatures, while for Cr (III) 99.99% and Ni (II) 100% maximum efficiency was achieved at 35°C, which indicates that the adsorption process is endothermic.\u0000The experimental results of the adsorption of Cu (II) metal ions are in good agreement with the Langmuir and Freundlich theoretical models, while for Cr (III) and Ni (II) ions they are in better agreement with the Langmuir adsorption model.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"65 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140224039","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}

{"title":"Nutritive Composition and GC- MS Analysis of Bioactive Phytochemicals from the Methanolic Extracts of the Stem and Root of Tephrosia vogelii","authors":"Utaji I. I., Gyang F. N., Ezeigwe F. C., Ideh E. L., Okoh A. O.","doi":"10.9734/irjpac/2024/v25i2847","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i2847","url":null,"abstract":"Aims: This study was aimed at investigating the nutritive composition and bioactive compounds in the methanol extracts of root and stem of Tephoresia vogelii.\u0000Place and Duration of Study: Sample: Samples were collected in K- Vom community in Jos, Plateau state Nigeria between April and May 2023.\u0000Methodology: Sample extractions were carried out using maceration method. phytochemical screening and nutritive composition were carried out using standard methods while the  bioactive compounds were detected using GC-MS technique. Phytochemicals were ascertained based on molecular weights (m/z) acquired from GC-MS chromatograms. Phytocompounds were established through interpretation of spectral peaks and comparing  data with stored databases from the National Institute Standard and Technique (NIST) library.\u0000Results: The extracts had variable percentage yield with methanol root extract having the highest (3.80%). The results of the phytochemical screening showed the presence and absence of some phytochemicals while the proximate composition varied significantly (P=0.002). The                  moisture content was in the range of (6.75 to 9.50%), protein (8.99 to 11.56%), crude fiber (2.00 to 7.33%), fat content (47.33 to 51.06%), ash content (15.80 to 17.60%) and carbohydrate (8.33 to 13.84%) in the methanol extracts of the root and stem. Gas Chromatography-  Mass Spectrometry, (GC-MS) determined some specific phytocompounds in the extracts, GC-MS analysis furnished a combined total of 14 phytocompounds in the two extracts with unsaturated aliphatic hydrocarbons and fatty acids being the major families detected.\u0000Conclusion: The extracts upon analysis revealed high potential for a vast number of bioactive compounds which justifies its use for various ailments by traditional practitioners. Phytochemical components identified in this study advocate the presence of ethnomedical and phytopharmaceutical versality of each of the extracts which could be used in the therapeutic drug formulation studies.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140245632","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}

{"title":"Sonochemical Analysis of Methylene Blue with Additives and ZnO Nanoparticles in Aqueous Medium","authors":"Md. Shaharul Islam, Md. Samiul Bari Avick, Jahangir Hossain, M. S. Alam, Md. Helal Uddin","doi":"10.9734/irjpac/2024/v25i2846","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i2846","url":null,"abstract":"The use of ultrasound was found to be a very suitable and effective method for the degradation of hazardous dyestuffs. The degradation of dye molecules in aqueous media in the presence of various additives by ultrasonic irradiation was investigated in order to clarify the degradation mechanism. In this investigation, Methylene Blue (MB) has been used as a representative of azo dye and inorganic salts like NaCl and Na2SO4 were used as additives. Besides degradation in presence of CCl4 and H2O2 solutions were observed. ZnO nanoparticle was also used for the investigation of degradation. The volume of all solutions was 100ml containing 25mg/L of MB. The sonication of dye molecules were conducted for 0, 5, 15, 25 minutes. The degradation mechanism was discussed in details adopting UV- visible spectra. From the experiments it is clear that the acidic condition is favorable for dye degradation. Evaluating the results we have also found that all additives aided the degradation comparatively higher or lower the extent depending on their used amount in solution. So, it is a clear indication that azo dyes from waste water can be efficiently removed by using sonochemical irradiation method under acidic condition","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"121 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140089069","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}

{"title":"Kinetic Studies of Effects of Heat on PET Plastics: TGA, DTA, XRD and DSC Analysis","authors":"A. Nurudeen, F. O. Nwosu, M. Soliu","doi":"10.9734/irjpac/2024/v25i1845","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i1845","url":null,"abstract":"In this work, the effects of heat on plastic waste (PET plastic bottles) were investigated. During thermogravimetric analysis, the kinetics of the PET pyrolysis was studied using a combination of model-fitting and model-free methods. About 12mg of the grinded PET sample was weighed into the ceramic crucible and then heated from temperature of 30 °C to 950 °C at two heating rates of 10°C/min and 20°C /min.  Thermogravimetric analysis indicated that the decomposition of plastic waste in a Nitrogen atmosphere can be divided into three stages: the minor loss stage (100°C), the major loss stage (450–520°C) and the stable loss stage (500–900°C). The corresponding weight loss at two different heating rates of 10°C/min and 20°C /min were determined to of 70% and 77.7% respectively. Based on R2 (regression coefficient) values, heating rate of 20oC/min gave the values (0.9279) for the model free method employed (KAS model). When compared to the model fitting, 0.75th order of reaction gave the closest  R2 value (0.9643) which also translated to a very close Activation energies of 264 KJ/mol and 255 KJ/mol respectively. All in all, it can be deduced that the activation energy of PET pyrolysis falls within 250 – 280 KJ/mol based on this study. Also, X-Ray Diffraction and Differential Scanning Calorimetry analysis were carried out. The narrow and high nature of the XRD peaks depicted that the sample is crystalline. And lastly, DSC analysis investigated the heat flowing in and out of the PET sample. The exodermal (where cold re-crystallization occurred) and endothermal (where melting occur) peaks were recorded as 165oC and 138oC respectively. It is recommended that other model-free and model-fitting methods should be invested in further research in order to generate a wide range of data for kinetics of PET.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"66 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140424340","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}

{"title":"Synthesis of Silver Nanomaterials Capping by Fruit-mediated Extracts and Antimicrobial Activity: A Critical Review","authors":"Md. Sazu Ahamed, Md. Shawan Ali, Shanawaz Ahmed, Sumaiya Islam Sadia, Md. Rockibul Islam, Md. Ashikur Rahaman, Md. Ashraful Alam","doi":"10.9734/irjpac/2024/v25i1844","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i1844","url":null,"abstract":"Natural silver nanoparticles are currently being used innovatively by a unique simple route. Different bio-mediated fruit peel extracts were used to produce silver nanoparticles (AgNPs) and explore the synthesis of environmentally friendly aspects. To produce biodegradable AgNPs various bio-mediated fruit peel extracts function as reducing and capping agents in the synthesis route. It was discovered that several fruit peel extracts act as a capping agent and silver ions (Ag+ to Ag0). Due to reduction, the reaction changes the hydrogel's distinctive hue to a reddish-brown appearance. UV-visible spectra of the AgNPs showed a distinctive surface plasmon resonance (SPR) peak around 460.0 nm. Using X-ray diffraction, the crystallographic nature was discovered with brags diffraction. FT-IR confirmed silver ions function as a capping and reducing agent from peel extract. The transmission electron microscope confirmed that the average size of the nanoparticles was below 100.0 nm and internal morphology. These nanoparticles' ability to combat bacteria, algae and fungi was also well investigated. This manuscript highlights the different bio-mediated and peal extracts that are efficient in producing AgNPs and their function for promising antimicrobial activity.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"241 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140428175","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}

{"title":"Absolute Configuration Determination of Sugar: A Review of the Different Methods","authors":"João Rufino de Freitas Filho, J. C. R. Freitas, Juliano Carlo Rufino Freitas, M. Belian, Claudio Augusto Gomes da Camara, Pedro Ramos de Souza Neto, Alécia Regina Andresa Silva, Alex Sandro Nascimento da Silva Filho, Alice Mariana Souza de Almeida, Jonatas Tavares da Silva, Mirian Luzinete da Silva, Anne Gabrielle Marques da Silva, Marcilio Martins de Moraes, Clécio Souza Ramos, Ronaldo Nascimentos de Oliveira","doi":"10.9734/irjpac/2024/v25i1843","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i1843","url":null,"abstract":"Determination of the stereochemistry of the stereocenter from the aglyconic part of carbohydrates is always one of the most important tasks for chemistry carbohydrates researchers. The absolute configuration (AC), a challenge for synthetic chemists, has attracted much attention. During the past few decades, many techniques and approaches have been developed to determine the AC of carbohydrates, including methods of X-ray diffraction (XRD), electronic and vibrational circular dichroism (ECD and VCD), Raman optical activity (ROA), nuclear magnetic resonance (NMR) utilizing anisotropic effects of chiral derivatizing agents, and quantum chemical calculations. On the other hand, none of the currently applied techniques can dominate AC determination, since they each have their respective limitations corresponding to the different structural features. This review summarizes most of the techniques and methods commonly used in AC assignment of carbohydrates (but specifically glycosides), in the last decades (2000-2023). \u0000GRAPHICAL ABSTRACT \u0000","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"47 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139804617","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}

{"title":"Absolute Configuration Determination of Sugar: A Review of the Different Methods","authors":"João Rufino de Freitas Filho, J. C. R. Freitas, Juliano Carlo Rufino Freitas, M. Belian, Claudio Augusto Gomes da Camara, Pedro Ramos de Souza Neto, Alécia Regina Andresa Silva, Alex Sandro Nascimento da Silva Filho, Alice Mariana Souza de Almeida, Jonatas Tavares da Silva, Mirian Luzinete da Silva, Anne Gabrielle Marques da Silva, Marcilio Martins de Moraes, Clécio Souza Ramos, Ronaldo Nascimentos de Oliveira","doi":"10.9734/irjpac/2024/v25i1843","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i1843","url":null,"abstract":"Determination of the stereochemistry of the stereocenter from the aglyconic part of carbohydrates is always one of the most important tasks for chemistry carbohydrates researchers. The absolute configuration (AC), a challenge for synthetic chemists, has attracted much attention. During the past few decades, many techniques and approaches have been developed to determine the AC of carbohydrates, including methods of X-ray diffraction (XRD), electronic and vibrational circular dichroism (ECD and VCD), Raman optical activity (ROA), nuclear magnetic resonance (NMR) utilizing anisotropic effects of chiral derivatizing agents, and quantum chemical calculations. On the other hand, none of the currently applied techniques can dominate AC determination, since they each have their respective limitations corresponding to the different structural features. This review summarizes most of the techniques and methods commonly used in AC assignment of carbohydrates (but specifically glycosides), in the last decades (2000-2023). \u0000GRAPHICAL ABSTRACT \u0000","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139864416","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}

{"title":"The Study of the Effect of Surfactants on Copper Codeposition with SiC Nano Particulate from Deep Eutectic Solvent Ionic Liquids (Ethaline)","authors":"K. E. Ttaib, A. Benhmid","doi":"10.9734/irjpac/2024/v25i1842","DOIUrl":"https://doi.org/10.9734/irjpac/2024/v25i1842","url":null,"abstract":"Here we investigate the electrolytic deposition of copper and copper nano composites in the absence and the presence of two types of surfactants: cationic which is sodium dodecyl sulphate (SDS)  and the other type is cetyl  trimethyl ammonium bromide (CTAB) from a solution of the metal chloride salt in ethylene glycol–choline chloride based eutectics. The SEM images and EDAX analysis allow in situ quantification or particulate inclusion. It is quite interesting to perceive that the composition of composite material was strongly dependent on the amount of species suspended in solution. Again the data here has revealed that the majority of material was dragged onto the surface rather than settling on to it. The distribution of the composite material was found to be even throughout the coating. This technology is important because it facilitates deposition of bright copper coatings without co-ligands such as cyanide which is not friendly environment.","PeriodicalId":14371,"journal":{"name":"International Research Journal of Pure and Applied Chemistry","volume":"48 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139608300","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}