A simple, effective and highly selective cloud point extraction procedure was performed for enrichment of Pb (II) from aqueous matrix. The process depends on the formation of a stable complex between Pb (II) ions and Azure A compound at pH 6.0. The formed complex was extracted into micelle phase “Tergitol-NP7” at 25°C. This method was used for preconcentration of Pb (II) before its determination by FAAS. The values of limit of detection and limit of quantification were determined as 2.5 and 4.7 μg l -1 , respectively. The enrichment factor of the method was determined as 10 for 50 ml sample volume. Pb 2+ analyte was quantitatively extracted and successfully determined in the presence of the most common foreign ions. The proposed method was then employed for the analysis of Pb (II) in natural and wastewater samples.
采用一种简单、有效、高选择性的云点萃取法富集铅(II)。该过程依赖于pH 6.0时Pb (II)离子与Azure a化合物之间形成稳定的络合物。在25℃下将形成的配合物萃取到胶束相“Tergitol-NP7”中。用该法对铅(II)进行预富集，然后用原子吸收光谱法测定。检测限为2.5 μg l -1，定量限为4.7 μg l -1。测定该方法的富集系数为10，样品体积为50 ml。定量提取pb2 +分析物，并在最常见的外来离子存在下成功测定。然后将该方法应用于自然和废水样品中的铅(II)分析。
{"title":"Separation and determination of Pb (II) ions from aqueous media by cloud point extraction","authors":"Y. Sürme","doi":"10.32571/ijct.732677","DOIUrl":"https://doi.org/10.32571/ijct.732677","url":null,"abstract":"A simple, effective and highly selective cloud point extraction procedure was performed for enrichment of Pb (II) from aqueous matrix. The process depends on the formation of a stable complex between Pb (II) ions and Azure A compound at pH 6.0. The formed complex was extracted into micelle phase “Tergitol-NP7” at 25°C. This method was used for preconcentration of Pb (II) before its determination by FAAS. The values of limit of detection and limit of quantification were determined as 2.5 and 4.7 μg l -1 , respectively. The enrichment factor of the method was determined as 10 for 50 ml sample volume. Pb 2+ analyte was quantitatively extracted and successfully determined in the presence of the most common foreign ions. The proposed method was then employed for the analysis of Pb (II) in natural and wastewater samples.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"20 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134004481","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}
The phase transition of GeO 2 structure was studied under constant pressure by using ab initio calculation and the generalized gradient approximation (GGA). A structural phase transition was observed at 30 GPa for the first time under the constant hydrostatic pressure, and P4 2 /mnm structure was transformated into a CaCl 2 (Pnnm) structure. This phase transition was also investigated using total energy, enthalpy, and the phase shift calculations. It was determined that the obtained transformation parameters and bulk modulus properties were compatible with the previous experimental and theoretical first principle calculations.
{"title":"Phase transition of GeO2 crystal at high pressure: An ab initio molecular dynamics study","authors":"S. Alptekin","doi":"10.32571/ijct.725601","DOIUrl":"https://doi.org/10.32571/ijct.725601","url":null,"abstract":"The phase transition of GeO 2 structure was studied under constant pressure by using ab initio calculation and the generalized gradient approximation (GGA). A structural phase transition was observed at 30 GPa for the first time under the constant hydrostatic pressure, and P4 2 /mnm structure was transformated into a CaCl 2 (Pnnm) structure. This phase transition was also investigated using total energy, enthalpy, and the phase shift calculations. It was determined that the obtained transformation parameters and bulk modulus properties were compatible with the previous experimental and theoretical first principle calculations.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126747376","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}
İsmail Ti̇yek, Emrah Kaçmaz, M. Yazici, Mahmut Kilinçkiran
Spunbond method is widely used in the production of nonwoven fabrics. Melt flow index (MFI) is one of the most important polymer processing parameters. In this paper, tensile strength and elongation values of spunbond fabrics with four different weights produced from polypropylene polymers with two different MFI values were measured. Tensile strength tests were analyzed by two-way multiple variance analysis (Two-Way Manova) in the SPSS statistical package program, and the effects of MFI and weight values on the strength properties of spunbond textile surfaces were examined. As a result of the statistical analysis, it was observed that statistically significant differences (p 0.05).
{"title":"Statistical analysis of the effect of melt flow index and weight changes on strength properties of polypropylene spunbond fabrics","authors":"İsmail Ti̇yek, Emrah Kaçmaz, M. Yazici, Mahmut Kilinçkiran","doi":"10.32571/ijct.735747","DOIUrl":"https://doi.org/10.32571/ijct.735747","url":null,"abstract":"Spunbond method is widely used in the production of nonwoven fabrics. Melt flow index (MFI) is one of the most important polymer processing parameters. In this paper, tensile strength and elongation values of spunbond fabrics with four different weights produced from polypropylene polymers with two different MFI values were measured. Tensile strength tests were analyzed by two-way multiple variance analysis (Two-Way Manova) in the SPSS statistical package program, and the effects of MFI and weight values on the strength properties of spunbond textile surfaces were examined. As a result of the statistical analysis, it was observed that statistically significant differences (p 0.05).","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122961350","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}
This study aims a numerical investigation of steady, laminar mixed convection heat transfer in a two-dimensional cavity by employing a finite volume method with a fourth-order approximation of convective terms, when nanoparticles are present. With the aim of solving two-dimensional momentum and energy conservation equations, a finite volume method on a non-uniform staggered grid is utilized. Second-order central differences are utilized to approximate diffusion terms in momentum and energy equations, while the development of a non-uniform four-point fourth-order interpolation (FPFOI) scheme is performed for the convective terms. Continuity and momentum equations are solved using the SIMPLE (Semi-Implicit Method for Pressure-Linked Equation) algorithm. In order to evaluate heat transfer enhancement, various viscosity and thermal conductivity models were employed. Numerical solution results were obtained in different models in cases where Gr number is between 103 and 105, Re number is 10-100-1000 and nanoparticle volumetric fraction is 0-5%.
{"title":"A numerical study of Mixed convection heat transfer in a lid-driven cavity using Al2O3-water nanofluid","authors":"N. Çakmak, H. H. Durmazuçar, K. Yapıcı","doi":"10.32571/ijct.697728","DOIUrl":"https://doi.org/10.32571/ijct.697728","url":null,"abstract":"This study aims a numerical investigation of steady, laminar mixed convection heat transfer in a two-dimensional cavity by employing a finite volume method with a fourth-order approximation of convective terms, when nanoparticles are present. With the aim of solving two-dimensional momentum and energy conservation equations, a finite volume method on a non-uniform staggered grid is utilized. Second-order central differences are utilized to approximate diffusion terms in momentum and energy equations, while the development of a non-uniform four-point fourth-order interpolation (FPFOI) scheme is performed for the convective terms. Continuity and momentum equations are solved using the SIMPLE (Semi-Implicit Method for Pressure-Linked Equation) algorithm. In order to evaluate heat transfer enhancement, various viscosity and thermal conductivity models were employed. Numerical solution results were obtained in different models in cases where Gr number is between 103 and 105, Re number is 10-100-1000 and nanoparticle volumetric fraction is 0-5%.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125026101","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}
The dynamic mechanical analysis was performed on five different formulations of a reinforced epoxy resin matrix with sugarcane bagasse (SCB) using hand lay-up technique. The viscoelastic behaviours of the composites were studied by analyzing the thermal parameters such as storage modulus E'(MPa), loss modulus E''(MPa), and tanδ as the temperature increases at periodic stress frequencies of 2.5, 5, and 10 Hz using Dynamic Mechanical Analyzer (DMA). The results revealed that E'(MPa) and E''(MPa) decreased with increasing temperature for all composites, while the tanδ increased with increasing temperatures. As the frequency of oscillation is increased, the viscoelastic parameters was seen to increase as well. However, the tanδ (damping coefficient) was found to decrease with increase in SCB fibre loading due to the good load-bearing capacity of the composites. The tanδ peak temperature of the composites was found to be higher than the onset temperature of E'(MPa) and peak temperature of E"(MPa) which depict higher accuracy. Futhermore, it was seen that the increase in SCB fibre content in the epoxy resin increased the glass transition temperature (Tg).
{"title":"Dynamic mechanical properties of epoxy resin matrix reinforced with sugarcane bagasse","authors":"M. Abdullahi","doi":"10.32571/ijct.694558","DOIUrl":"https://doi.org/10.32571/ijct.694558","url":null,"abstract":"The dynamic mechanical analysis was performed on five different formulations of a reinforced epoxy resin matrix with sugarcane bagasse (SCB) using hand lay-up technique. The viscoelastic behaviours of the composites were studied by analyzing the thermal parameters such as storage modulus E'(MPa), loss modulus E''(MPa), and tanδ as the temperature increases at periodic stress frequencies of 2.5, 5, and 10 Hz using Dynamic Mechanical Analyzer (DMA). The results revealed that E'(MPa) and E''(MPa) decreased with increasing temperature for all composites, while the tanδ increased with increasing temperatures. As the frequency of oscillation is increased, the viscoelastic parameters was seen to increase as well. However, the tanδ (damping coefficient) was found to decrease with increase in SCB fibre loading due to the good load-bearing capacity of the composites. The tanδ peak temperature of the composites was found to be higher than the onset temperature of E'(MPa) and peak temperature of E\"(MPa) which depict higher accuracy. Futhermore, it was seen that the increase in SCB fibre content in the epoxy resin increased the glass transition temperature (Tg).","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129905701","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}
D. Surmelioglu, Zeyneb Merve Ozdemir, Sevim Atılan Yavuz, Halime Kolsuz
The aim of study was to evaluate the mineral changes caused by enamel bleaching treatments at different application times by scanning electron microscope- energy dispersive X-Ray (SEM-EDX). In this study, 36 teeth were divided into 3 groups after mineral measurements (Flour, Silicon, Aluminum, Strontium) with SEM-EDX (n ₌ 12). 40% hydrogen peroxide gel was used for bleaching in all groups. Bleaching was performed 20 min for Group 1, 40 min for Group 2, 60 min for Group 3. Mineral measurements were performed with SEM-EDX after treatment. In the intra-group comparison, although there was no significant difference between Flour (F) and Silicon (Si) values (p ˃ 0.05), there was statistically significant difference in Aluminum (Al) and Strontium (Sr) values (p < 0.05). After the bleaching process for different application times, mineral change was observed in time-depending comparison. The best results were obtained for Group 2, appling according to manufacturer's instructions.
{"title":"Effect of bleaching treatment on element content of enamel","authors":"D. Surmelioglu, Zeyneb Merve Ozdemir, Sevim Atılan Yavuz, Halime Kolsuz","doi":"10.32571/ijct.669762","DOIUrl":"https://doi.org/10.32571/ijct.669762","url":null,"abstract":"The aim of study was to evaluate the mineral changes caused by enamel bleaching treatments at different application times by scanning electron microscope- energy dispersive X-Ray (SEM-EDX). In this study, 36 teeth were divided into 3 groups after mineral measurements (Flour, Silicon, Aluminum, Strontium) with SEM-EDX (n ₌ 12). 40% hydrogen peroxide gel was used for bleaching in all groups. Bleaching was performed 20 min for Group 1, 40 min for Group 2, 60 min for Group 3. Mineral measurements were performed with SEM-EDX after treatment. In the intra-group comparison, although there was no significant difference between Flour (F) and Silicon (Si) values (p ˃ 0.05), there was statistically significant difference in Aluminum (Al) and Strontium (Sr) values (p < 0.05). After the bleaching process for different application times, mineral change was observed in time-depending comparison. The best results were obtained for Group 2, appling according to manufacturer's instructions.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122788517","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}
In this study, a non-peripheral phthalonitrile compound was prepared as a starting material. Then this 3,4-dimethoxymethoxy substituted non-peripheral phthalonitrile compound was reacted with Co, Zn and Cu salts. Non-peripheral phthalocyanine compounds were prepared using an easy and practical method. The fluorescence spectra of the zinc phthalocyanine compound were measured in tetrahydrofuran. Aggregation studies showed the compliance with the lambert-beer law in the concentration range studied for non-peripheral phthalocyanine compounds. Thermogravimetric (TG) analyses showed that the compounds were stable. The photovoltaic performance of these phthalocyanine compounds was measured as current density-voltage (J-V). The calculated power conversion effects showed that these compounds had the potential to be used for dye-sensitized solar cell (DSSC) structures.
{"title":"Photovoltaic, thermal, fluorescence and aggregation properties of non-peripherally metallophthalocyanines bearing four 3,4-dimethoxyphenethoxy substituents","authors":"Derya Güngördü Solğun, M. Ağırtaş, S. Horoz","doi":"10.32571/ijct.687373","DOIUrl":"https://doi.org/10.32571/ijct.687373","url":null,"abstract":"In this study, a non-peripheral phthalonitrile compound was prepared as a starting material. Then this 3,4-dimethoxymethoxy substituted non-peripheral phthalonitrile compound was reacted with Co, Zn and Cu salts. Non-peripheral phthalocyanine compounds were prepared using an easy and practical method. The fluorescence spectra of the zinc phthalocyanine compound were measured in tetrahydrofuran. Aggregation studies showed the compliance with the lambert-beer law in the concentration range studied for non-peripheral phthalocyanine compounds. Thermogravimetric (TG) analyses showed that the compounds were stable. The photovoltaic performance of these phthalocyanine compounds was measured as current density-voltage (J-V). The calculated power conversion effects showed that these compounds had the potential to be used for dye-sensitized solar cell (DSSC) structures.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129050476","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}
S. Kandemirli, M. Yilmazer, M. Saracoglu, F. Kandemirli
Metrizoic acid is a molecule used as meglumine metrizoate, sodium metrizoate contrast agent. 6 Isopak 44o* is a contrast medium containing a mixture of sodium, calcium, magnesium and N-methylglucamine salts of metrizoic acid. In order to determine the reactivity properties of metrizoic acid, melagnomie, anionic form of metrizoate, Metrisoate K, metrizoate-melagnomie salt, and Na-metrizoate, DFT calculations were made in gas and water phses at the level of B3LYP/LANL2DZ with the help of Gaussian 09 software. Some global chemical reactivity descriptors such as highest occupied molecular orbital energy, lowest empty molecular orbital energy, absolute hardness, chemical potential, softness, electronegativity, chemical potential, global electrophilicity and electrofugality were calculated. Moreover, nonlinear optical properties of the title compound were calculated too. In addition, thermodynamic properties of the molecules examined at different temperatures were calculated in gas and water phases. The findings of this study, obtained from extensive and time-consuming calculations and analyses, will be an important source of information for the preparation of the drug combination in the future.
{"title":"Theoretical B3LYP study of contrast agent metrizoate","authors":"S. Kandemirli, M. Yilmazer, M. Saracoglu, F. Kandemirli","doi":"10.32571/ijct.712499","DOIUrl":"https://doi.org/10.32571/ijct.712499","url":null,"abstract":"Metrizoic acid is a molecule used as meglumine metrizoate, sodium metrizoate contrast agent. 6 Isopak 44o* is a contrast medium containing a mixture of sodium, calcium, magnesium and N-methylglucamine salts of metrizoic acid. In order to determine the reactivity properties of metrizoic acid, melagnomie, anionic form of metrizoate, Metrisoate K, metrizoate-melagnomie salt, and Na-metrizoate, DFT calculations were made in gas and water phses at the level of B3LYP/LANL2DZ with the help of Gaussian 09 software. Some global chemical reactivity descriptors such as highest occupied molecular orbital energy, lowest empty molecular orbital energy, absolute hardness, chemical potential, softness, electronegativity, chemical potential, global electrophilicity and electrofugality were calculated. Moreover, nonlinear optical properties of the title compound were calculated too. In addition, thermodynamic properties of the molecules examined at different temperatures were calculated in gas and water phases. The findings of this study, obtained from extensive and time-consuming calculations and analyses, will be an important source of information for the preparation of the drug combination in the future.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122910543","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}
Diabetes is seen as the global health problem of the world due to the high risk of complications and the increasing prevalence of death. The routine diagnosis of diabetes is the injection of insulin. This treatment has a lot of side effects known to the patient (infection at injection sites, irritation, etc.). In order to overcome such conditions in the treatment of diabetes and provide faster recovery, many different delivery systems for insulin are being studied. Hydrogels are interesting polymers with hydrophobic structure that can be designed in 3D networks for oral insulin delivery. In this study, we studied the synthesis of biodegradable, biocompatible, low-toxicity therapeutic hydrogels. Acrylamide (ACR):carboxymethyl cellulose (CMC) (ACR/CMC), Acrylamide (ACR): Chitosan (Chi) and Chitosan:glutaraldehyde hydrogels were prepared. The CMC was used in acrylamide-based hydrogels for both comonomer and biocompatibility. The swelling capacity of hydrogels and the in vitro release of insulin from hydrogels were studied at different pH. Insulin release studies have shown that ACR/CMC hydrogels are a good and new alternative as an oral insulin carrier.
{"title":"The synthesizing of different hydrogel nanocarriers for oral ınsulin delivery","authors":"Pelin Peker, Burcu Okutucu","doi":"10.32571/ijct.679553","DOIUrl":"https://doi.org/10.32571/ijct.679553","url":null,"abstract":"Diabetes is seen as the global health problem of the world due to the high risk of complications and the increasing prevalence of death. The routine diagnosis of diabetes is the injection of insulin. This treatment has a lot of side effects known to the patient (infection at injection sites, irritation, etc.). In order to overcome such conditions in the treatment of diabetes and provide faster recovery, many different delivery systems for insulin are being studied. Hydrogels are interesting polymers with hydrophobic structure that can be designed in 3D networks for oral insulin delivery. In this study, we studied the synthesis of biodegradable, biocompatible, low-toxicity therapeutic hydrogels. Acrylamide (ACR):carboxymethyl cellulose (CMC) (ACR/CMC), Acrylamide (ACR): Chitosan (Chi) and Chitosan:glutaraldehyde hydrogels were prepared. The CMC was used in acrylamide-based hydrogels for both comonomer and biocompatibility. The swelling capacity of hydrogels and the in vitro release of insulin from hydrogels were studied at different pH. Insulin release studies have shown that ACR/CMC hydrogels are a good and new alternative as an oral insulin carrier.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125089814","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}
This study reflects the adsorption ability and usable of peanut shell-polyurethane type rigid foam for the removal of remazol orange RGB (RO-RGB) dye, a reactive dye, from aqueous solution. RO-RGB removal was studied for initial dye concentrations (10-150 mg l-1), pH values (3-9), and temperatures (20-60C) at various contact times. Dye removal increased with the increases in initial dye concentration and temperature while it was decreasing with an increase in pH. Maximum dye removal was determined to be about 98% under all the experimental conditions. Equilibrium data obtained were adapted to the Langmuir, Freundlich, and Temkin isotherm models, and it was seen that the adsorption obeyed the Freundlich isotherm model with determination of coefficient of r2 = 0.966. Kinetics data was found to be harmony with the pseudo-second kinetic order model (higher than r2 = 0.9908). As a result, it was determined that the polyurethane-type rigid foam produced from peanut shell could be used as an alternative to activated carbon and could easily be used as an adsorptive material to remove RO-RGB dye.
{"title":"Use of peanut shell-based polyurethane type rigid foam in removing remazol orange RGB dye from aqueous solution","authors":"B. Acemioğlu","doi":"10.32571/ijct.725783","DOIUrl":"https://doi.org/10.32571/ijct.725783","url":null,"abstract":"This study reflects the adsorption ability and usable of peanut shell-polyurethane type rigid foam for the removal of remazol orange RGB (RO-RGB) dye, a reactive dye, from aqueous solution. RO-RGB removal was studied for initial dye concentrations (10-150 mg l-1), pH values (3-9), and temperatures (20-60C) at various contact times. Dye removal increased with the increases in initial dye concentration and temperature while it was decreasing with an increase in pH. Maximum dye removal was determined to be about 98% under all the experimental conditions. Equilibrium data obtained were adapted to the Langmuir, Freundlich, and Temkin isotherm models, and it was seen that the adsorption obeyed the Freundlich isotherm model with determination of coefficient of r2 = 0.966. Kinetics data was found to be harmony with the pseudo-second kinetic order model (higher than r2 = 0.9908). As a result, it was determined that the polyurethane-type rigid foam produced from peanut shell could be used as an alternative to activated carbon and could easily be used as an adsorptive material to remove RO-RGB dye.","PeriodicalId":267255,"journal":{"name":"International Journal of Chemistry and Technology","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134201445","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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