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Comparative Adsorption of Methylene Blue on Different Low Cost Adsorbents by Continuous Column Process 不同低成本吸附剂对亚甲基蓝的连续柱吸附比较
International Letters of Chemistry, Physics and Astronomy Pub Date : 2018-01-25 DOI: 10.18052/www.scipress.com/ilcpa.77.26
Mohammad Abul Hossain, Mahbbat Ali, T. S. A. Islam
{"title":"Comparative Adsorption of Methylene Blue on Different Low Cost Adsorbents by Continuous Column Process","authors":"Mohammad Abul Hossain, Mahbbat Ali, T. S. A. Islam","doi":"10.18052/www.scipress.com/ilcpa.77.26","DOIUrl":"https://doi.org/10.18052/www.scipress.com/ilcpa.77.26","url":null,"abstract":"Dyes are commonly found in the effluents of many industries. The effectiveness of adsorption for the removal of dye from wastewaters has been made it an ideal alternative to other expensive treatment methods. Continuous column adsorption is more affective than batch adsorption. A comparative column adsorption study was performed using three different low cost adsorbents for the removal of methylene blue from synthetic wastewater. Sand was collected from Cox’s Bazar, and sugarcane bagasse and used black tea leaves were locally prepared in laboratory. Three columns were designed for different adsorbents maintaining all conditions were to be approximately similar. UV-vis spectroscopic method was used for analysis of methylene blue in solution. Column adsorption experiments were performed to investigate the comparison of breakthrough curves and exhaust capacity of three different adsorbents. Column study shows that the adsorption capacity of used black tea leaves is highest. The adsorption capacity of bagasse is lower than tea leaves but higher than sand.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90477696","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}
引用次数: 7
Structural and Optical Properties of Thermally Oxidized Zirconium Dioxide Films 热氧化二氧化锆薄膜的结构和光学性质
International Letters of Chemistry, Physics and Astronomy Pub Date : 2018-01-25 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.77.15
Venkataiah Sunke, U. Suda
{"title":"Structural and Optical Properties of Thermally Oxidized Zirconium Dioxide Films","authors":"Venkataiah Sunke, U. Suda","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.77.15","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.77.15","url":null,"abstract":"Zirconium oxide (ZrO2) thin films were grown by thermal oxidation of metallic zirconium films deposited by sputtering of zirconium target by DC magnetron sputtering technique. The metallic zirconium films were thermally oxidized in oxygen atmosphere at different temperatures in the range from 300°C to 500°C. The as-deposited and oxidized films were characterized for their chemical composition by energy dispersive X-ray analysis, structure by X-ray diffraction, chemical binding configuration with Fourier transform infrared spectroscopy and optical absorption using UV-Vis NIR spectrophotometer. Metallic zirconium film was polycrystalline in nature with hexagonal structured Zr. The zirconium films were transformed into monoclinic ZrO2 with polycrystalline in nature at oxidation temperature of 400°C. Crystallite size of the ZrO2 films increased from 78 nm to 108 nm with increase in the oxidation temperature form 400°C to 500°C. The optical band gap increased from 5.42 eV to 5.46 eV and refractive index decreased from 2.05 to 2.02 with increase of oxidation temperature from 400°C to 500°C.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86216784","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}
引用次数: 6
Modelling All-Optical Switching and Limiting Properties of AlAs Photonic Crystals 阿拉斯光子晶体的全光开关和限制特性建模
International Letters of Chemistry, Physics and Astronomy Pub Date : 2018-01-25 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.77.1
M. Fernando, K. Gamalath
{"title":"Modelling All-Optical Switching and Limiting Properties of AlAs Photonic Crystals","authors":"M. Fernando, K. Gamalath","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.77.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.77.1","url":null,"abstract":"The incorporation of defect modes into the perfect crystal structure allows the control of the flow of light by altering the photonic bandgap and thereby can be manipulated to achieve optical switching. A model for all optical switching and limiting based on two dimensional photonic crystals is proposed for AlAs and the performance in square and hexagonal lattice structures were evaluated. Simulations were done using 2D finite difference time domain model incorporating instantaneous Kerr’s nonlinearity. The optimal nonlinear resonant frequencies and the refractive index change required for the performance in the nonlinear regime were obtained. The limiter effectiveness is analysed using extinction ratio. The lattice constant and the optimal microcavity distance required for the proposed model to work as a switch and a limiter in the telecommunication wavelength of 1.55 µm were obtained asand 2a respectively.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75424717","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}
引用次数: 1
Hybrid Approach for Synthesis and Antimicrobial Activity of Heterocyclic Compounds 杂环化合物的杂化合成及其抑菌活性研究
International Letters of Chemistry, Physics and Astronomy Pub Date : 2018-01-25 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.77.35
N. Desai, D. Vaja
{"title":"Hybrid Approach for Synthesis and Antimicrobial Activity of Heterocyclic Compounds","authors":"N. Desai, D. Vaja","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.77.35","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.77.35","url":null,"abstract":"We have synthesized novel series of N-(1-(2-(1-phenyl-3-(p-tolyl)-1H-pyrazol-4-yl)-5-(pyridin-4-yl)-1,3,4-oxadiazol-3(2H)-yl)ethylidene)arylaniline and their derivatives. The structures of synthesized compounds were well characterized by spectroscopic techniques. Antimicrobial activity of the newly synthesized derivatives was evaluated against gram positive (S. aureus and S. pyogenes), gram negative bacteria (E. coli and P. aeruginosa), and strains of fungi (C. albicans, A. niger and A. clavatus). Among the screened derivatives 5c, 5f, 5i, 5l and 5t demonstrated superior antimicrobial activity against microbial strains.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"171 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77524541","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}
引用次数: 3
Antibacterial Screening of some Heterocyclic Compounds Containing Quinoline Nucleus 含喹啉核杂环化合物的抗菌筛选
International Letters of Chemistry, Physics and Astronomy Pub Date : 2017-10-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.76.27
S. Baluja, N. Godvani, S. Chanda
{"title":"Antibacterial Screening of some Heterocyclic Compounds Containing Quinoline Nucleus","authors":"S. Baluja, N. Godvani, S. Chanda","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.76.27","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.76.27","url":null,"abstract":"In this work, some novel derivatives of Cyanopyridines and Isoxazoles were synthesized using Vilsmeier-Haack reagent and their structures were confirmed by FTIR, 1H NMR and mass spectroscopic methods. The antibacterial activities of these synthesized compounds were studied in DMSO and DMF by agar well diffusion method against some Gram positive and Gram negative bacteria. It is observed that activity depends upon three S: solvent, strain and structure.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90726428","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}
引用次数: 0
Effects of Two-Dimensional Noncommutative Theories on Bound States Schrödinger Diatomic Molecules under New Modified Kratzer-Type Interactions 二维非对易理论对束缚态的影响Schrödinger新修正kratzer型相互作用下双原子分子
International Letters of Chemistry, Physics and Astronomy Pub Date : 2017-10-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.76.1
A. Maireche
{"title":"Effects of Two-Dimensional Noncommutative Theories on Bound States Schrödinger Diatomic Molecules under New Modified Kratzer-Type Interactions","authors":"A. Maireche","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.76.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.76.1","url":null,"abstract":"In this work, an analytical expression for the nonrelativistic energy spectrum of some diatomic molecules was obtained through the Bopp’s shift method in the noncommutative (NC) two-dimensional real space-phase symmetries (NC: 2D-RSP) with a new modified Kratzer-type potential (NMKP) in the framework of two infinitesimal parameters and due to (space-phase) noncommutativity, by means of the solution of the noncommutative Schrödinger equation. The perturbation property of the spin-orbital Hamiltonian operator and new Zeeman effect of two-dimensional system are investigated. We have shown that, the new energy of diatomic molecule is the sum of ordinary energy of modified Kratzer-type potential, in commutative space, and new additive terms due to the contribution of the additive part of the NMKP. We have shown also that, the group symmetry of (NC: 2D-RSP) reduce to new sub-group symmetry of NC two-dimensional real space (NC: 2D-RSP) under new modified Kratzer-type interactions.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90644520","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}
引用次数: 12
Adsorption of Methylene Blue Dye onto Bush Cane Bark Powder 灌木蔗皮粉对亚甲基蓝染料的吸附研究
International Letters of Chemistry, Physics and Astronomy Pub Date : 2017-10-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.76.12
C. K. Enenebeaku, N. J. Okorocha, U. E. Enenebeaku, B. Onyeachu
{"title":"Adsorption of Methylene Blue Dye onto Bush Cane Bark Powder","authors":"C. K. Enenebeaku, N. J. Okorocha, U. E. Enenebeaku, B. Onyeachu","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.76.12","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.76.12","url":null,"abstract":"The adsorption of methylene blue (MB) dye on bush cane bark powder has been studied by analyzing the effect of contact time, initial dye concentration, adsorbent dose, pH, and temperature on the amount of the MB dye adsorbed per unit mass of the bush cane bark powder adsorbent. An optimum adsorption could be achieved during 80 min contact time but, thereafter, decreased with contact time beyond 80 min. The adsorption of the methylene blue dye increased with increasing the initial dye concentration, temperature and pH. However, the amount of methylene blue adsorbed decreased with increasing the dosage of the adsorbent; a phenomenon attributed to a plausible agglomeration of the adsorbent and blocking of the preferred adsorption sites with increasing adsorbent dosage. The adsorption mechanism of the dye obeyed the Freundlich isotherm. Kinetic studies showed that the methylene blue adsorption onto bush cane bark powder adsorbent followed a second order reaction kinetics. The adsorbent was characterized by Fourier transform infra-red spectrophotometer and scanning electron microscope analysis.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78629195","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}
引用次数: 11
pH Controlled Reversible Interaction of Remazol Orange with Chitin pH控制的雷马唑橙与几丁质的可逆相互作用
International Letters of Chemistry, Physics and Astronomy Pub Date : 2017-08-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.75.25
Muhammad Mominur Rahman, Abdullah Muhammad Zakaria, S. Dey, Ashaduzzaman, S. Shamsuddin
{"title":"pH Controlled Reversible Interaction of Remazol Orange with Chitin","authors":"Muhammad Mominur Rahman, Abdullah Muhammad Zakaria, S. Dey, Ashaduzzaman, S. Shamsuddin","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.75.25","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.75.25","url":null,"abstract":"Biomaterials offer alternative opportunities to build sustainable environment compared to synthetic polymeric materials. Here, we utilized a naturally occurring and plentiful biopolymer, chitin, for the studies on interactive phenomena of a reactive textile dye, Remazol Orange (RO), from aqueous solution. The functional groups and crystallinity of chitin were examined by Fourier transform infrared spectroscopy (FT-IR) and x-ray diffraction (XRD) study. Scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) were employed for the exploration of morphology and thermal stability of chitin. In order to investigate the effects of pH, contact time and initial RO concentration, batch studies were performed at room temperature of 25°C. Chitin exhibited a highly pH controlled reversible interaction with RO. RO was bounded 116.3 milligram per gram of chitin at pH 2.0 within 90 minutes of continuous shaking whereas 98.45% (w/w) RO were immediately unbounded from the chitin surface when the in-situ environment was changed at pH 10. Langmuir adsorption isotherm and pseudo-second order kinetic plot indicate homogeneous chemisorption and uniform monolayer of dye molecules on chitin surface. The findings from this study will certainly add value to analytical research leading to advanced applications in separation science and technology.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81866434","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}
引用次数: 2
Volumetric Properties of Sodium Cyclamate Solutions in Presence of Glucose and Sucrose 葡萄糖和蔗糖存在下甜蜜素钠溶液的体积性质
International Letters of Chemistry, Physics and Astronomy Pub Date : 2017-08-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.75.37
Sanjeevan J. Kharat, S. M. Munde
{"title":"Volumetric Properties of Sodium Cyclamate Solutions in Presence of Glucose and Sucrose","authors":"Sanjeevan J. Kharat, S. M. Munde","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.75.37","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.75.37","url":null,"abstract":"Densities of sodium cyclamate (Na-cycl) in water and (0.1, 0.3, and 0.5) m (glucose/sucrose) have been measured at (298.15, 303.15, 308.15, and 313.15) K. From density values, partial molar volumes (V0Φ), expansion coefficient (E∞), Hepler’s constant (δ2V0Φ/δT2)p, apparent specific volumes (ASV), partial molar volumes of transfer (∆trsV0Φ), doublet (VAB) and triplet (VABB) interaction coefficients have been calculated. An increase in the values of V0Φ and ∆trsV0Φ was observed with increase in the concentration of glucose/sucrose. The positive values of E∞ and V0Φ are due to the strong solute-solvent interactions. The positive values of (δ2V0Φ/δT2)p suggest structure making behaviour of sodium cyclamate in water and in presence of glucose and sucrose. The positive values of (∆trsV0Φ) and VAB may be due to the interactions between hydrophilic group (–OH, C=O, and –O–) of glucose/sucrose and sodium ion of sodium cyclamate. All solutions studied exhibit sweet taste because ASV of all solutions ranges from (0.569 × 10-6) m3×kg-1 to (0.626 × 10-6) m3×kg-1.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88077002","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}
引用次数: 0
Pressure Effects on the Optical Properties of LuVO4:Eu3+ Nanoparticles 压力对LuVO4:Eu3+纳米粒子光学性质的影响
International Letters of Chemistry, Physics and Astronomy Pub Date : 2017-08-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.75.1
B. Jovanic, Marco Bettinelli, B. Radenkovic, M. Despotović-Zrakić, F. Piccinelli, Z. Bogdanović
{"title":"Pressure Effects on the Optical Properties of LuVO4:Eu3+ Nanoparticles","authors":"B. Jovanic, Marco Bettinelli, B. Radenkovic, M. Despotović-Zrakić, F. Piccinelli, Z. Bogdanović","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.75.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.75.1","url":null,"abstract":"The effect of hydrostatic pressure (varying up to 110 kbar) at the room temperature on three lines at 594nm, 615nm and 619nm positions in emission spectra and fluorescence lifetime t of the Eu3+ for 0-2 line (5D0→7F2 transition) in LuVO4: Eu3+ nanoparticles was studied. The results showed that the increase of the pressure induced lines red shift towards longer wavelengths for all considered lines with different rate. Also, the fluorescence lifetime τ for 5D0 → 7F2 transition nonlinearly decreased with pressure in the considered pressure range. Line positions and fluorescence lifetime τ, were explained by a model which took into account the effect of high pressure on: refractive index of crystal; compression, polarizability of the crystal and individual ions. Satisfactory agreement between measured and theoretical predicted values with error less than 2% was obtained.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85430543","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}
引用次数: 2
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