Pub Date : 2019-03-01DOI: 10.33945/SAMI/AJCA.2019.2.2032015
M. Jafari
A new method for estimation of adsorption properties of a solid phase microextraction fiber by artificial neural network (ANN) has been studied for the first time ever. An etched steel fiber which is simple prepared and durable was selected and adsorption of 12 analytes that were in four different chemical categories, was studied. 9 of them were selected as the training and 3 as the test. The amount of adsorptions were obtained through the direct extraction from aqueous and then GC analysis. The adsorption were analyzed by ANN. The results are quite satisfactory and the mean absolute percentage error of tests was 18.0 %. The method was simple, practical, straightforward, economical, and accurate. The method did not require many analytes.
{"title":"The Prediction of Adsorption Properties of a Solid Phase-Microextraction Fiber by Chemometrics methods","authors":"M. Jafari","doi":"10.33945/SAMI/AJCA.2019.2.2032015","DOIUrl":"https://doi.org/10.33945/SAMI/AJCA.2019.2.2032015","url":null,"abstract":"A new method for estimation of adsorption properties of a solid phase microextraction fiber by artificial neural network (ANN) has been studied for the first time ever. An etched steel fiber which is simple prepared and durable was selected and adsorption of 12 analytes that were in four different chemical categories, was studied. 9 of them were selected as the training and 3 as the test. The amount of adsorptions were obtained through the direct extraction from aqueous and then GC analysis. The adsorption were analyzed by ANN. The results are quite satisfactory and the mean absolute percentage error of tests was 18.0 %. The method was simple, practical, straightforward, economical, and accurate. The method did not require many analytes.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"123 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73757607","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 : 2019-03-01DOI: 10.33945/SAMI/AJCA.2019.2.225233
D. F. Latona
The oxidation of propane-1,3-diol by potassium permanganate in aqueous solution was investigated at λmax 525 nm. The rate of the reaction was found to increase with increase in [KMnO4] and [Propane-1,3-diol]. The reaction showed first order dependence each in [KMnO4] and [Propane-1,3-diol] and independent in the ionic strength of the solution. The values of 〖∆H〗^#(kJ mol-1), 〖∆S〗^# (kJK-1mol-1) and〖 ∆G〗^#(kJ mol-1) were 24.98, -0.22 and 90.50 respectively. Negative activation of entropy revealed an ordered transition state for the reaction. Spectroscopic studies and FTIR analysis revealed the product of the reaction to be 3-hydroxy-propanone. A suitable reaction mechanism is proposed for the reaction investigated.
{"title":"Kinetics and Mechanism of Propane-1,3-diol Oxidation by Mn(VII) in Aqueous Medium","authors":"D. F. Latona","doi":"10.33945/SAMI/AJCA.2019.2.225233","DOIUrl":"https://doi.org/10.33945/SAMI/AJCA.2019.2.225233","url":null,"abstract":"The oxidation of propane-1,3-diol by potassium permanganate in aqueous solution was investigated at λmax 525 nm. The rate of the reaction was found to increase with increase in [KMnO4] and [Propane-1,3-diol]. The reaction showed first order dependence each in [KMnO4] and [Propane-1,3-diol] and independent in the ionic strength of the solution. The values of 〖∆H〗^#(kJ mol-1), 〖∆S〗^# (kJK-1mol-1) and〖 ∆G〗^#(kJ mol-1) were 24.98, -0.22 and 90.50 respectively. Negative activation of entropy revealed an ordered transition state for the reaction. Spectroscopic studies and FTIR analysis revealed the product of the reaction to be 3-hydroxy-propanone. A suitable reaction mechanism is proposed for the reaction investigated.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78737456","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 : 2019-01-30DOI: 10.29088/SAMI/AJCA.2019.2.2144
Oyebanji M. Opeyemi, H. Louis, Chinanso I. Opara, O. O. Funmilayo, T. Magu
A remarkable source of renewable energy is the Dye-sensitized solar cells (DSCs). However, the major limitation of power conversion efficiency (PCE) of devices is their inability to produce electricity using photons from the nearinfrared (NIR) spectral region. Some Metal-free organic sensitizers make use of strong electron donating or withdrawing moieties to tune the optical band gap to allow the absorption of lower energy wavelengths in charge transfer systems while porphyrins and phthalocyanines compounds are used to shift the Soret and Q bands toward lower energy absorption. Various molecules are been synthesized to improve and increase the power conversion efficiency of the compounds. This study discusses the structure of these compounds, working principles and their derivatives as recent advances been carried out to improve the power efficiencies of the compounds.
{"title":"Porphyrin and Phthalocyanines-Based Solar Cells: Fundamental Mechanisms and Recent Advances","authors":"Oyebanji M. Opeyemi, H. Louis, Chinanso I. Opara, O. O. Funmilayo, T. Magu","doi":"10.29088/SAMI/AJCA.2019.2.2144","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.2144","url":null,"abstract":"A remarkable source of renewable energy is the Dye-sensitized solar cells (DSCs). However, the major limitation of power conversion efficiency (PCE) of devices is their inability to produce electricity using photons from the nearinfrared (NIR) spectral region. Some Metal-free organic sensitizers make use of strong electron donating or withdrawing moieties to tune the optical band gap to allow the absorption of lower energy wavelengths in charge transfer systems while porphyrins and phthalocyanines compounds are used to shift the Soret and Q bands toward lower energy absorption. Various molecules are been synthesized to improve and increase the power conversion efficiency of the compounds. This study discusses the structure of these compounds, working principles and their derivatives as recent advances been carried out to improve the power efficiencies of the compounds.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83539099","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 : 2019-01-30DOI: 10.29088/SAMI/AJCA.2019.2.128135
H. Noorizadeh, A. Farmany
The adsorption features of amino functionalized superparamagnetic iron oxide nanoparticle/SiO2 for selective removal of arsenic in water is studied. Amino functionalized superparamagnetic iron oxide nanoparticle/SiO2 is synthesized and characterized with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and electron microscope (SEM). FTIR shows amine group successfully attached to nanoparticle. XRD-diffraction pattern show that the magnetic phase of superparamagnetic nanoparticle is magnetite by inverse spinel crystal structure. SEM image was used to study the morphology of superparamagnetic nanoparticle. The adsorption capability of the nanoparticle was examined in batch system. The nanoparticle was used for removal of arsenic in aqueous media. Adsorption experimental data showed that the adsorption of arsenic on the nanoparticle is depended on pH and contact time.
{"title":"Adsorptive Removal of Arsenic from Aqueous Solutions Using Amino Functionalized Super paramagnetic Iron Oxide Nanoparticle/SiO2","authors":"H. Noorizadeh, A. Farmany","doi":"10.29088/SAMI/AJCA.2019.2.128135","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.128135","url":null,"abstract":"The adsorption features of amino functionalized superparamagnetic iron oxide nanoparticle/SiO2 for selective removal of arsenic in water is studied. Amino functionalized superparamagnetic iron oxide nanoparticle/SiO2 is synthesized and characterized with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and electron microscope (SEM). FTIR shows amine group successfully attached to nanoparticle. XRD-diffraction pattern show that the magnetic phase of superparamagnetic nanoparticle is magnetite by inverse spinel crystal structure. SEM image was used to study the morphology of superparamagnetic nanoparticle. The adsorption capability of the nanoparticle was examined in batch system. The nanoparticle was used for removal of arsenic in aqueous media. Adsorption experimental data showed that the adsorption of arsenic on the nanoparticle is depended on pH and contact time.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73623802","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 : 2019-01-30DOI: 10.29088/SAMI/AJCA.2019.2.165174
S. Darzi, N. Mohseni
Sol-gel synthesis of surfactant-templated nanostructured ceramic materials is usually carried out via controlled hydrolysis and condensation of a starting material in the presence of micelles of a polymer, followed by its removal by extraction or calcination. In this work, surfactant template sol-gel route for the synthesis of thorium dioxide gels using thorium nitrate and octyl phenol ethoxylate polymer as a structure directing agent was described, and the sinterability of the produced ThO2 powder (ThO2-S) was investigated in comparison with commercial one (ThO2-C). Prepared ThO2-S composed of micro and meso pores and exhibited high surface area as 31.23 m2/g and particle size as 15.1 nm. The produced powder ThO2-S was pressed and sintered to form the high density ThO2 pellet. The final grain size of the pellets reached below micrometer size. The calculated green and sintered densities of the fabricated pellets, and their microstructural characteristics studies, utilizing SEM images, show that this synthesizing route yielded a good sinterability of the synthesized ThO2 nanopowder at low temperature. Prepared ThO2-S sample and commercial ThO2 were sintered under the atmospheres “Ar” and “Ar-8%H2, and comparison of data from samples sintered under the both of two different atmospheres at 1500 °C, show that the atmosphere had no effect on density value. Furthermore, the green density of ThO2-S pellets is less than ThO2-C but the pellets which were fabricated from the ThO2-S have reached better sintered density than the pellets fabricated by ThO2-C.
{"title":"Preparation of ThO2 as a structural analogue for nuclear fuel via surfactant-templated sol-gel route","authors":"S. Darzi, N. Mohseni","doi":"10.29088/SAMI/AJCA.2019.2.165174","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.165174","url":null,"abstract":"Sol-gel synthesis of surfactant-templated nanostructured ceramic materials is usually carried out via controlled hydrolysis and condensation of a starting material in the presence of micelles of a polymer, followed by its removal by extraction or calcination. In this work, surfactant template sol-gel route for the synthesis of thorium dioxide gels using thorium nitrate and octyl phenol ethoxylate polymer as a structure directing agent was described, and the sinterability of the produced ThO2 powder (ThO2-S) was investigated in comparison with commercial one (ThO2-C). Prepared ThO2-S composed of micro and meso pores and exhibited high surface area as 31.23 m2/g and particle size as 15.1 nm. The produced powder ThO2-S was pressed and sintered to form the high density ThO2 pellet. The final grain size of the pellets reached below micrometer size. The calculated green and sintered densities of the fabricated pellets, and their microstructural characteristics studies, utilizing SEM images, show that this synthesizing route yielded a good sinterability of the synthesized ThO2 nanopowder at low temperature. Prepared ThO2-S sample and commercial ThO2 were sintered under the atmospheres “Ar” and “Ar-8%H2, and comparison of data from samples sintered under the both of two different atmospheres at 1500 °C, show that the atmosphere had no effect on density value. Furthermore, the green density of ThO2-S pellets is less than ThO2-C but the pellets which were fabricated from the ThO2-S have reached better sintered density than the pellets fabricated by ThO2-C.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88497026","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 : 2019-01-01DOI: 10.29088/SAMI/AJCA.2019.2.7378
M. Heravi, N. Karimi, Samira Pooremami
We introduced a very simple, one-pot three component procedure for preparation of 2,4,5-triaryl-imidazoles from the reaction of benzyl, aldehydes and ammonium acetate, as ammonia source, catalyzed by Caro's acid-silica gel under Solvent –free condition.
{"title":"One-Pot Three Components Synthesis of 2,4,5-Triaryl-Imidazoles Catalyzed by Caro's Acid-Silica Gel Under Solvent–Free Condition","authors":"M. Heravi, N. Karimi, Samira Pooremami","doi":"10.29088/SAMI/AJCA.2019.2.7378","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.7378","url":null,"abstract":"We introduced a very simple, one-pot three component procedure for preparation of 2,4,5-triaryl-imidazoles from the reaction of benzyl, aldehydes and ammonium acetate, as ammonia source, catalyzed by Caro's acid-silica gel under Solvent –free condition.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89259754","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 : 2019-01-01DOI: 10.29088/SAMI/AJCA.2019.2.5772
Sakineh Alizadeh, T. Madrakian, M. Bahram
The present study aims to present a new convenient sensor for heavy metals, based on aggregation of citrate-capped- N, N' biphenyl hydrazine 1, 2 dicarbothioamide (PHCA) - modified- (AuNPs). This paper reports a procedure for sensitive and selective spectrophotometric methods for simultaneous determination of mercury (Hg22+) and cadmium (Cd2+). For this aim multivariate data including kinetic spectra of AuNPs were collected during aggregation process. The characterization of AuNPs was performed by transmission electron microscopy (TEM) and Infra-Red (IR) spectroscopy. Partial least square (PLS) regression as an efficient multivariate calibration method was employed to make a connection between the surface plasmon resonance (SPR) spectra of the generated AuNPs. The number of PLS latent variables was optimized by leave-one-out cross-validation utilizing prediction residual error sum of square (PRESS). The linear range was in the range of 3.33 × 10-5 - 3.33 × 10-6 mol L-1 and 2.0 × 10-5 - 1.0 × 10-6 mol L-1, the detection limit was 1.21×10-7 and 0.5 ×10-7 mol L-1 (n=5) for Hg22+and Cd2+, respectively. This method used successfully for simultaneous determination of Hg22+ and Cd2+ in West Azerbaijan regional waters namely Zarineh / Simineh rivers and Urmia Lake.
{"title":"Selective and Sensitive Simultaneous Determination of Mercury and Cadmium based on the Aggregation of PHCA Modified- AuNPs in West Azerbaijan Regional Waters","authors":"Sakineh Alizadeh, T. Madrakian, M. Bahram","doi":"10.29088/SAMI/AJCA.2019.2.5772","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.5772","url":null,"abstract":"The present study aims to present a new convenient sensor for heavy metals, based on aggregation of citrate-capped- N, N' biphenyl hydrazine 1, 2 dicarbothioamide (PHCA) - modified- (AuNPs). This paper reports a procedure for sensitive and selective spectrophotometric methods for simultaneous determination of mercury (Hg22+) and cadmium (Cd2+). For this aim multivariate data including kinetic spectra of AuNPs were collected during aggregation process. The characterization of AuNPs was performed by transmission electron microscopy (TEM) and Infra-Red (IR) spectroscopy. Partial least square (PLS) regression as an efficient multivariate calibration method was employed to make a connection between the surface plasmon resonance (SPR) spectra of the generated AuNPs. The number of PLS latent variables was optimized by leave-one-out cross-validation utilizing prediction residual error sum of square (PRESS). The linear range was in the range of 3.33 × 10-5 - 3.33 × 10-6 mol L-1 and 2.0 × 10-5 - 1.0 × 10-6 mol L-1, the detection limit was 1.21×10-7 and 0.5 ×10-7 mol L-1 (n=5) for Hg22+and Cd2+, respectively. This method used successfully for simultaneous determination of Hg22+ and Cd2+ in West Azerbaijan regional waters namely Zarineh / Simineh rivers and Urmia Lake.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83030292","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 : 2019-01-01DOI: 10.29088/SAMI/AJCA.2019.2.1420
M. Fekri, A. Omrani, S. Bozorgi, M. R. Mehr
Schiff bases, an aldehyde- or ketone-like compounds in which the carbonyl group is replaced by an imine or azomethine, are some of the most widely used organic compounds. In this study, the quantum mechanics calculations were performed on M(Chel) where M=Ni(II) and Chel= BAE (bis-acetylacetoneethylenediimine), BBE=bis(benzoyl acetone)ethylenediimine, BFE= bis(1,1,1-triflouroacetylacetone) ethylenediimine and BCE = bis(3-chloroacetylacetone) ethylenediimine) ligands using Gaussian 03 and hartree-fock theory (HF) at B3LYP/6-311G level in the gas phase and solution phase. The polarized continuum model (PCM) is used to calculate salvation energies. After optimizing, various parameters such as electrode potentials, energy gap, chemical hardness, chemical potential and electrophilicity in solvent (DMSO) have been calculated. It was found to be planar and four coordinate. Reduction potentials toward a given M(II) according to the Schiff base ligands changed in the trend: BAE >BCE >BFE.
{"title":"Study of Electrochemical and Electronical Properties on the Some Schiff Base Ni Complexes in DMSO Solvent by Computational Methods","authors":"M. Fekri, A. Omrani, S. Bozorgi, M. R. Mehr","doi":"10.29088/SAMI/AJCA.2019.2.1420","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.1420","url":null,"abstract":"Schiff bases, an aldehyde- or ketone-like compounds in which the carbonyl group is replaced by an imine or azomethine, are some of the most widely used organic compounds. In this study, the quantum mechanics calculations were performed on M(Chel) where M=Ni(II) and Chel= BAE (bis-acetylacetoneethylenediimine), BBE=bis(benzoyl acetone)ethylenediimine, BFE= bis(1,1,1-triflouroacetylacetone) ethylenediimine and BCE = bis(3-chloroacetylacetone) ethylenediimine) ligands using Gaussian 03 and hartree-fock theory (HF) at B3LYP/6-311G level in the gas phase and solution phase. The polarized continuum model (PCM) is used to calculate salvation energies. After optimizing, various parameters such as electrode potentials, energy gap, chemical hardness, chemical potential and electrophilicity in solvent (DMSO) have been calculated. It was found to be planar and four coordinate. Reduction potentials toward a given M(II) according to the Schiff base ligands changed in the trend: BAE >BCE >BFE.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83287029","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 : 2019-01-01DOI: 10.29088/SAMI/AJCA.2019.2.7993
A. M. Ahmed, A. Ali, Ahmed Ghazy
In this study, the adsorption potential of activated carbon olive stone for removal of Ni(II) ions from wastewater has been investigated. The study involves batch type experiments to investigate the effect of initial concentration, adsorbent dose, agitation speed, contact time, temperature and pH of solution on adsorption process and the optimum conditions were evaluated. The adsorption process has fit pseudo-second order kinetic models. Langmuir and Freundlichadsorption isotherm models were applied to analyze adsorption data and both were found to be applicable to this adsorption process. Thermodynamic parameters, e.g., ΔGo, ΔSo and ΔHo of the on-going adsorption process have also been calculated and the sorption process was found to be endothermic. Finally, it can be seen that activated carbon olive stone was found to be more effective for the removal of Ni(II) from waste water than any adsorbent was used.
{"title":"Adsorption Separation of Nickel from Wastewater by using Olive Stones","authors":"A. M. Ahmed, A. Ali, Ahmed Ghazy","doi":"10.29088/SAMI/AJCA.2019.2.7993","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.7993","url":null,"abstract":"In this study, the adsorption potential of activated carbon olive stone for removal of Ni(II) ions from wastewater has been investigated. The study involves batch type experiments to investigate the effect of initial concentration, adsorbent dose, agitation speed, contact time, temperature and pH of solution on adsorption process and the optimum conditions were evaluated. The adsorption process has fit pseudo-second order kinetic models. Langmuir and Freundlichadsorption isotherm models were applied to analyze adsorption data and both were found to be applicable to this adsorption process. Thermodynamic parameters, e.g., ΔGo, ΔSo and ΔHo of the on-going adsorption process have also been calculated and the sorption process was found to be endothermic. Finally, it can be seen that activated carbon olive stone was found to be more effective for the removal of Ni(II) from waste water than any adsorbent was used.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86293456","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 : 2019-01-01DOI: 10.29088/SAMI/AJCA.2019.2.113
E. Gomaa, Mahmud Nabil Abdel Hady, Mahmoud H. Mahmoud, Doaa Ahmed El Kot
Cyclic Voltammetry of Cobalt chloride with different concentrations was measured experimentally using DY2000 potentiostat. We used 0.1 M KCl as supporting electrolyte. Glassy carbon working electrode was used, purified and polished before use. The other two electrodes are platinum wire and Ag/AgCl electrode put in saturated KCl solution were used. The complex characters for the interaction of CoCl2 with Ceftriaxone disodium salt (Cefs) were studied with the use of different Ceftriaxone disodium salt (Cefs) concentrations at 298.65 K. The oxidation, reduction mechanisms and the stability constants of the complexes formed are discussed. Scan rate and different kinetic parameters resulted from the interaction of CoCl2 with Ceftriaxone disodium salt (Cefs) were also evaluated and their values were discussed.
用DY2000恒电位器对不同浓度氯化钴的循环伏安法进行了实验测定。我们使用0.1 M KCl作为支撑电解质。采用玻碳工作电极，在使用前进行提纯和抛光。另外两种电极分别是铂丝和Ag/AgCl电极，电极置于饱和氯化钾溶液中。在298.65 K温度下，用不同浓度的头孢曲松二钠(Ceftriaxone disodium salt, Cefs)研究了CoCl2与Ceftriaxone disodium salt (Cefs)相互作用的络合特性。讨论了络合物的氧化还原机理和稳定常数。对CoCl2与头孢曲松二钠盐(Ceftriaxone disodium salt, Cefs)相互作用的扫描速率和不同动力学参数进行了评价，并对其取值进行了讨论。
{"title":"Cyclic Voltammetry of Aqueous CoCl2 in the Presence of Ceftriaxone Disodium Salt (Cefs) at 298.65 K","authors":"E. Gomaa, Mahmud Nabil Abdel Hady, Mahmoud H. Mahmoud, Doaa Ahmed El Kot","doi":"10.29088/SAMI/AJCA.2019.2.113","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.113","url":null,"abstract":"Cyclic Voltammetry of Cobalt chloride with different concentrations was measured experimentally using DY2000 potentiostat. We used 0.1 M KCl as supporting electrolyte. Glassy carbon working electrode was used, purified and polished before use. The other two electrodes are platinum wire and Ag/AgCl electrode put in saturated KCl solution were used. The complex characters for the interaction of CoCl2 with Ceftriaxone disodium salt (Cefs) were studied with the use of different Ceftriaxone disodium salt (Cefs) concentrations at 298.65 K. The oxidation, reduction mechanisms and the stability constants of the complexes formed are discussed. Scan rate and different kinetic parameters resulted from the interaction of CoCl2 with Ceftriaxone disodium salt (Cefs) were also evaluated and their values were discussed.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82483964","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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