Bulletin of the Chemical Society of Ethiopia最新文献_第7页

Production rate of heterocyclic compounds iodinated N-(p-chlorophenyl)-3,5- dimethyl-1,1-dioxo-1,2-thiazine 碘化N-（对氯苯基）-3,5-二甲基-1,1-二氧-1,2-噻嗪杂环化合物的产率

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-06-30 DOI: 10.4314/bcse.v37i5.16

Shireen Ibrahim Hamadamin

{"title":"Production rate of heterocyclic compounds iodinated N-(p-chlorophenyl)-3,5- dimethyl-1,1-dioxo-1,2-thiazine","authors":"Shireen Ibrahim Hamadamin","doi":"10.4314/bcse.v37i5.16","DOIUrl":"https://doi.org/10.4314/bcse.v37i5.16","url":null,"abstract":"ABSTRACT. Iodinated heterocyclic molecules are crucial structural components of many natural products, including hormones, vitamins, and medicines. The pharmaceutical survey is very interested in the investigation of the kinetics of the iodination of N-(p-chlorophenyl)-3,5-dimethyl-1,1-dioxo-1,2-thiazine. The rate of iodination is directly dependent on the concentration of both 1,2-thiazine and iodine under different molar ratios (1:10), (10:1) adopted on the isolation method, the observed rate of iodination, the pseudo-first-order and the second order using (1:1) molar ratio in the overall reaction using spectrophotometric techniques. Thermodynamic activation parameters activation energy Ea, enthalpy change ΔH#, entropy change ΔS#, and Gibbs free energy ΔG# of activation were calculated from the rate constant at temperatures 273, 283, 293, 303, and 318 K. \u0000 \u0000KEY WORDS: Production rate, 1,2-Thiazine, Iodine (I2), Kinetic \u0000Bull. Chem. Soc. Ethiop. 2023, 37(5), 1253-1262. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i5.16","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49173827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and characterization of ternary composite g-C3N4-WO3/rGO for photocatalytic activity in degradation of methylene blue 三元复合材料g-C3N4-WO3/rGO光催化降解亚甲基蓝的合成与表征

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-06-30 DOI: 10.4314/bcse.v37i5.5

Zainab Waheed, Sadia Ghazanfar, Muhamamd Usman, Hafiz Muhammad Asif, Muhammad Tariq, K. Mahmood, A. Haider, M. Sirajuddin

{"title":"Synthesis and characterization of ternary composite g-C3N4-WO3/rGO for photocatalytic activity in degradation of methylene blue","authors":"Zainab Waheed, Sadia Ghazanfar, Muhamamd Usman, Hafiz Muhammad Asif, Muhammad Tariq, K. Mahmood, A. Haider, M. Sirajuddin","doi":"10.4314/bcse.v37i5.5","DOIUrl":"https://doi.org/10.4314/bcse.v37i5.5","url":null,"abstract":"ABSTRACT. In the present research work, ternary composite g-C3N4-WO3/rGO was prepared by using ultrasonic assisted wet impregnation procedure. The prepared ternary composite was characterized by using FT-IR, powder XRD, SEM, and EDX techniques. FTIR studies confirmed the presence of characteristic bonds of the representative components in the composite by showing their characteristic peaks. The XRD pattern of ternary composite g-C3N4-WO3/rGO showed the presence of peaks responsible for monoclinic phase of pure tungsten oxide (WO3) and the characteristic peaks of graphitic C3N4 and GO. SEM studies of g-C3N4-WO3/rGO revealed the presence of randomly dispersed tungsten oxide particles in between agglomerated 2-D layers of carbon nitride and GO sheets. EDX data confirmed the phase purity in the form of elemental composition of the prepared composite and further provided At wt% of each element in the composite. Photocatalytic activity of the synthesized composite was evaluated by performing photocatalytic degradation test of methylene blue (MB). The rate of degradation was measured by using Shimadzu UV-1800 UV-Vis Spectrophotometer by recording the decreasing concentration of dye in terms of their absorbance values. The results exhibited that g-C3N4-WO3/rGO showed better degradation efficiency in 180 min. \u0000 \u0000KEY WORDS: Impregnation, Composite, Photocatalyst, Degradation, Methylene blue \u0000Bull. Chem. Soc. Ethiop. 2023, 37(5), 1123-1131. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i5.5 ","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46387690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of total phenolic, total flavonoid, ascorbic acid contents and antioxidant activity of pumpkin flesh, peel and seeds 南瓜果肉、果皮和种子中总酚、总黄酮、抗坏血酸含量及抗氧化活性的测定

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-06-30 DOI: 10.4314/bcse.v37i5.3

Mulubrhan K. Hagos, Bhagwan Singh Chandravanshi, M. Redi-Abshiro, Estifanos Ele Yaya

{"title":"Determination of total phenolic, total flavonoid, ascorbic acid contents and antioxidant activity of pumpkin flesh, peel and seeds","authors":"Mulubrhan K. Hagos, Bhagwan Singh Chandravanshi, M. Redi-Abshiro, Estifanos Ele Yaya","doi":"10.4314/bcse.v37i5.3","DOIUrl":"https://doi.org/10.4314/bcse.v37i5.3","url":null,"abstract":"ABSTRACT. Pumpkins are increasingly regarded as functional foods since they contain valuable nutrients and bioactive substances that have positive health effects. The number of bioactive components depends on the origins and parts of the pumpkin, which define its antioxidant capacity. This study evaluated the total phenolic, total flavonoid, and ascorbic acid content and antioxidant activities of three parts of pumpkin from four different sample origins and investigated the correlation between them. The content of bioactive components in pumpkin from Dukem, Ethiopia, was highest in the flesh, peel, and seeds compared to the other sample areas. The Pearson correlation result indicated a strong relationship between the total phenolic, flavonoid, and ascorbic acid contents of pumpkin and their respective antioxidant activities. This study found that the total phenolic, total flavonoid, and ascorbic acid contents and antioxidant activity varied across the pumpkin sample sources and pumpkin parts. \u0000 \u0000KEY WORDS: Pumpkin, Flavonoid, Phenolic, Ascorbic acid, Antioxidant activity, Ethiopia \u0000 \u0000Bull. Chem. Soc. Ethiop. 2023, 37(5), 1093-1108. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i5.3 ","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44032104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Optical and colorimetric sensing of toxic mercury ion using green synthesized silver nanoparticles 绿色合成银纳米粒子对有毒汞离子的光学和比色传感

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-06-30 DOI: 10.4314/bcse.v37i5.19

A. Kalam, A. G. Al-Sehemi, M. Ashrafuzzaman, A. M. Sharif, P. Yadav and G. Du

{"title":"Optical and colorimetric sensing of toxic mercury ion using green synthesized silver nanoparticles","authors":"A. Kalam, A. G. Al-Sehemi, M. Ashrafuzzaman, A. M. Sharif, P. Yadav and G. Du","doi":"10.4314/bcse.v37i5.19","DOIUrl":"https://doi.org/10.4314/bcse.v37i5.19","url":null,"abstract":"ABSTRACT. In ancient, human used silver and silver salts but silver nanoparticles (AgNPs) have recently been found to be accepted as the result of green synthesis. Now a day, silver nanoparticles (AgNPs) have become extremely popular in the field of the sensor due to their remarkable and significant optical, chemical, and electrical properties. In this paper, we have reported the green and reasonably priced synthesis of silver nanoparticles using Acacia confusa leaf extract which acts as both capping as well as reducing agents. The optical sensing and morphology of the as prepared AgNPs were determined using ultraviolet-visible (UV-Visible) and scanning electron microscopy (SEM) analysis. The sensing of Hg2+ ion through colorimetric and optical have been studied by UV-Vis spectroscopy as well as the naked eye. Moreover, the SEM analysis showed that the volume of the extract had no considerable effect on the morphology except for size. The colorimetric and optical sensing study revealed that the as-synthesized AgNPs exhibited a good response with colorimetric and optical sensing activity specifically towards the toxic Hg2+ ion. \u0000 \u0000KEY WORDS: Green synthesis, AgNPs, Optical sensor, Ultrasonic method \u0000 \u0000Bull. Chem. Soc. Ethiop. 2023, 37(5), 1287-1298. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i5.19 ","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44188529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the corrosion inhibition of magnesium by coatings formulated with nano CeO and ZrO particles 纳米CeO和ZrO颗粒涂层对镁的缓蚀作用研究

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-06-30 DOI: 10.4314/bcse.v37i5.20

V. K. Neela Murali, M. S. Starvin, J. Bensam Raj

{"title":"Exploring the corrosion inhibition of magnesium by coatings formulated with nano CeO and ZrO particles","authors":"V. K. Neela Murali, M. S. Starvin, J. Bensam Raj","doi":"10.4314/bcse.v37i5.20","DOIUrl":"https://doi.org/10.4314/bcse.v37i5.20","url":null,"abstract":"ABSTRACT. In this study, zirconium oxide (ZrO)-cerium oxide (CeO) based composite coatings were fabricated using doctor blade method to protect pure magnesium from corrosion. The effects of ZrO and CeO on corrosion resistance of magnesium coatings were investigated using Tafel polarization method. Uniform deposition of composite coating without micro-voids was observed from scanning electron microscopy (SEM) analysis. The results exhibit that the addition of CeO show a higher corrosion resistance in comparison with the specimen coated without CeO in the electrolyte and bare Mg, and also it reduces the corrosion rate of Mg up to 3.67 x 10-5 mpy. Surface morphology of the so developed composite coating result a minimum corrosion on the surface. The usage of ZrO/CeO as coating material is a promising anticorrosive measure for Mg and its alloys due to its elevated corrosion resistance and durability. \u0000 \u0000KEY WORDS: Magnesium, Cerium oxide synthesis, composite coating, Tafel polarization, Surface morphology \u0000Bull. Chem. Soc. Ethiop. 2023, 37(5), 1299-1306. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i5.20 ","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41704822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design, synthesis, crystal structure and biological evaluation of novel 4-arylaminoquin- azoline derivatives as potent cytotoxic agents 新型4-芳基氨基喹啉衍生物的设计、合成、晶体结构和生物学评价

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-06-30 DOI: 10.4314/bcse.v37i5.10

Xiao Han, Liang Liang Chi, Wei Tao Qin, Ling Hou, Zhi Qiang Cai, Wen Jie Ren, Le Kun Wei

{"title":"Design, synthesis, crystal structure and biological evaluation of novel 4-arylaminoquin- azoline derivatives as potent cytotoxic agents","authors":"Xiao Han, Liang Liang Chi, Wei Tao Qin, Ling Hou, Zhi Qiang Cai, Wen Jie Ren, Le Kun Wei","doi":"10.4314/bcse.v37i5.10","DOIUrl":"https://doi.org/10.4314/bcse.v37i5.10","url":null,"abstract":"ABSTRACT. A series of novel 4-arylaminoquinazoline derivatives were synthesized by five-step reactions, the structure was characterized by IR, 1H NMR, MS and single crystal X-ray diffraction. The result of 5aX crystal was as follows: the crystal belongs to the monoclinic system, space group P21/c with a = 12.3637(4) Å, b = 12.7902(2) Å, c = 13.2240(5) Å, α = 90°, β = 117.030(5)°, γ = 90°, V = 1862.75(12) Å3, Z = 2, F(000) = 804.0, µ = 0.095 mm-1, S = 1.039, R = 0.0569, wR = 0.1535 for 8417 observed reflections with I > 2σ(I). The compound 5cX exhibited an excellent inhibitory effect on the cell line A549 (IC50 ＜ 2.5 µM) and the drug-resistant cell line H1975 (IC50 ＜ 2.5 µM) by the biological activitywhich were superior to the positive control Zorifertinib (against A549: IC50 = 31.08 µM; against H1975: IC50 = 64.17 µM). Molecular docking revealed that the better inhibitory activity of compound 5cX was owing to the combining EGFRWT and EGFRL858R/T790M by hydrogen bonding. The physicochemical properties of the compounds were predicted by using ADME data analysis, and the results showed that the compounds all obeyed Lipinski's five rules. \u0000 \u0000KEY WORDS: Quinazoline derivatives, Synthesis, X-ray diffraction, Antitumor activity \u0000Bull. Chem. Soc. Ethiop. 2023, 37(5), 1171-1183. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i5.10","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43277751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Headspace GC/MS and LC/MS analysis of bioactive compounds from Gossypium barbadense L. stem and assessment of their antimicrobial and cytotoxic activities 顶空气相色谱/质谱和液相色谱/质谱分析棉茎中活性物质及其抑菌和细胞毒活性

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-05-12 DOI: 10.4314/bcse.v37i4.17

Amani M.D. El-Mesallamy, Mohamed I.M. El-Zaidy, M. El-Telbany, M. El-Garby Younes, Sahar A.M Hussein

{"title":"Headspace GC/MS and LC/MS analysis of bioactive compounds from Gossypium barbadense L. stem and assessment of their antimicrobial and cytotoxic activities","authors":"Amani M.D. El-Mesallamy, Mohamed I.M. El-Zaidy, M. El-Telbany, M. El-Garby Younes, Sahar A.M Hussein","doi":"10.4314/bcse.v37i4.17","DOIUrl":"https://doi.org/10.4314/bcse.v37i4.17","url":null,"abstract":"ABSTRACT. In line with the global interest and demand in finding sustainable ways to the emerging antimicrobial and cytotoxic activities, our study highlights the unique chemical composition of G. barbadense stem. Petroleum ether extracts were analyzed via headspace-gas chromatography/mass spectrometry (HS-GC/MS) revealing 48 compounds, thirteen major and accounting for 56.29% of total peak areas. By using liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) identify 16 major phenolic compounds from the methanolic extract. Both petroleum ether and methanolic extracts were tested for antibacterial activity against four pathogenic bacterial strains (Escherichia coli ATCC10536, Staphylococcus aureus ATCC6538, Salmonella enterica ATCC 14028, and Pseudomonas aeruginosa ATCC 9027) by using disk diffusion method. The antifungal activity against two fungal strains (Aspergillus niger and Aspergillus fumigatus) was evaluated. The results were compared to the activity of ciprofloxacin as a stander. The in-vitro cytotoxic activity of the methanolic extract showed a potent effect against liver (HEPG2) with IC50 values (18.8±7.4 μg/mL) and moderate activity against colon (HCT116) and breast (MCF7) cancer. KEY WORDS: Gossypium Barbadense L. Stem, Headspace/GC/MS, LC-ESI-MS, Bioactive compounds, Antimicrobial, Cytotoxic activities Bull. Chem. Soc. Ethiop. 2023, 37(4), 1021-1032. DOI: https://dx.doi.org/10.4314/bcse.v37i4.17","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47380656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Complexation of some alkaline earth metals with bidentate uracil ligand: Synthesis, spectroscopic and antimicrobial analysis 一些碱土金属与双齿尿嘧啶配体的络合:合成、光谱和抗菌分析

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-05-12 DOI: 10.4314/bcse.v37i4.11

Ayman A.O. Younes, M. S. Refat, H. A. Saad, Abdel Majid A. Adam, Omar M. Alzoghibi, Ghayah M. Alsulaim, Amnah Mohammed Alsuhaibani

{"title":"Complexation of some alkaline earth metals with bidentate uracil ligand: Synthesis, spectroscopic and antimicrobial analysis","authors":"Ayman A.O. Younes, M. S. Refat, H. A. Saad, Abdel Majid A. Adam, Omar M. Alzoghibi, Ghayah M. Alsulaim, Amnah Mohammed Alsuhaibani","doi":"10.4314/bcse.v37i4.11","DOIUrl":"https://doi.org/10.4314/bcse.v37i4.11","url":null,"abstract":"ABSTRACT. Magnesium, calcium, strontium, and barium complexes of uracil were prepared in a 2:1 ligand to metal ratio to investigate the ligational character of the uracil (Ura). The modes of chelation were explained depending on elemental analyses, FT. IR, 1H–NMR spectra as well as scanning electron microscopy. Uracil has two donation sites either through N(3) and C(2)=O, or through N(3) and C(4)=O with the molecular formulas [M(Ura)2(H2O)2]Cl2 where M = Mg(II), Ca(II), Sr(II) and Ba(II) . The morphological surface and particle size of uracil metal complexes were determined using SEM and TEM. The thermal behaviors of the complexes were studied by the TGA (DTG) technique. The data obtained agreed well the proposed structures and showed that the complexes were finally decomposed to the corresponding metal oxide. The thermodynamic parameters are calculated from the thermal analysis curves using the Coats–Redfern and Horowitz–Metzger methods. The negative values of deduced the ordered structures of the prepared complexes compared to their starting reactants. Antibacterial activity of ligands and complexes is evaluated with two types of bacteria Staphylococcus aureus (gram‐positive) and Escherichia coli (gram‐negative) by the agar-well diffusion technique using DMSO as a solvent. \u0000 \u0000KEY WORDS: Uracil, Coordination compounds, Non-isothermal kinetic parameters, Elemental analysis, Spectral studies, Biological efficiency \u0000Bull. Chem. Soc. Ethiop. 2023, 37(4), 945-957. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i4.11","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43817538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regression modelling for concentration dependent mass density and specific volume of aqueous surfactant solutions 水表面活性剂溶液的浓度依赖质量密度和比容的回归模型

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-05-12 DOI: 10.4314/bcse.v37i4.19

S. Sivamani, Jeanifer Manganaan Ehilla, Saikat Banerjee, Manickam Vijayanand

{"title":"Regression modelling for concentration dependent mass density and specific volume of aqueous surfactant solutions","authors":"S. Sivamani, Jeanifer Manganaan Ehilla, Saikat Banerjee, Manickam Vijayanand","doi":"10.4314/bcse.v37i4.19","DOIUrl":"https://doi.org/10.4314/bcse.v37i4.19","url":null,"abstract":"ABSTRACT. In the present work, mathematical models relating mass density and specific volume of solution with concentration for aqueous solutions of anionic (sodium lauryl sulfate - SLS) and cationic (cetyltrimethylammonium bromide - CTAB) surfactants (0-10% (w/w)) have been investigated. The experimental studies were performed to study the effect of solution concentration on mass density and specific volume of solution. Mass density increases, and specific volume decreases with an increase in solution concentration for both surfactants. Linear, quadratic, cubic, quartic, quintic, and exponential models were fitted to the experimental data to check the applicability. The models were validated based on the coefficient of determination (R2) and the sum of square of error (SSE) to be unity and zero, respectively. Modelling results reveal that the quintic model was fitted to study the effect of density on solution concentration for both surfactants. \u0000 \u0000KEY WORDS: Density, Surfactant, Cetyltrimethylammonium bromide, Sodium lauryl sulfate, Modelling, Regression \u0000 \u0000Bull. Chem. Soc. Ethiop. 2023, 37(4), 1047-1054. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i4.19","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44757035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coffee spent supported Fe-Al-Zr composite: Synthesis, characterization and its adsorptive dye removal from tannery wastewater 咖啡渣负载Fe-Al-Zr复合材料的合成、表征及其对制革废水中染料的吸附去除

IF 1.2 4区化学

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-05-12 DOI: 10.4314/bcse.v37i4.6

Tigist Kebede, Abi M. Taddesse, A. Hussen

{"title":"Coffee spent supported Fe-Al-Zr composite: Synthesis, characterization and its adsorptive dye removal from tannery wastewater","authors":"Tigist Kebede, Abi M. Taddesse, A. Hussen","doi":"10.4314/bcse.v37i4.6","DOIUrl":"https://doi.org/10.4314/bcse.v37i4.6","url":null,"abstract":"ABSTRACT. This work was conducted to evaluate the adsorption performance of coffee spent modified Fe-Al-Zr composite. The Al2O3/Fe3O4/ZrO2 ternary oxide system was efficiently synthesized from the respective salt precursors by a two-step co-precipitation method under nitrogen atmosphere in basic condition. XRD, SEM-EDX, FTIR and ICP-OES were used to characterize the features of the adsorbents. The pH point of zero charge of the selected adsorbent was also determined. Batch adsorption experiment was conducted under different conditions such as contact time, initial concentration of dye, pH, sorbent dosage and agitation speed. The Langmuir and Freundlich, isotherms were tested to examine the adsorption behavior. The equilibrium data was well fitted to Langmuir isotherm model. The maximum adsorption capacity (qo) was 8.4 mg/g for acidic brown 75 dyes. The kinetic data correlated (R2 = 0.999) well with the pseudo second order kinetic model. To evaluate the practical applicability of the coffee spent supported nanocomposite adsorbent to real samples, effluent was collected from Batu Leather Industry. The result demonstrated 95.7% (10 mg/L) removal efficiency of the dye by the as-obtained composite indicating its potential application for environmental application. \u0000 \u0000KEY WORDS: Coffee spent, Nanocomposite, Sorption, Textile dye, Immobilization \u0000Bull. Chem. Soc. Ethiop. 2023, 37(4), 875-889. \u0000DOI: https://dx.doi.org/10.4314/bcse.v37i4.6","PeriodicalId":9501,"journal":{"name":"Bulletin of the Chemical Society of Ethiopia","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49467028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0