Pub Date : 2021-09-01DOI: 10.30492/IJCCE.2021.521915.4491
T. Cheng, Chen Chen, Chen-Xi Ye, Weifang Xie, Xiao Zhang, Tian Yuan
In this work, a novel composite photocatalyst, KBiO3/nano-Ag3PO4 (K/Ag catalyst), was synthesized, and efficiently degraded methylene blue (MB) under visible light. The various properties of photocatalyst were measured by modern analytical techniques, such as XRD, FT-IR, SEM, XPS, and UV-Vis. We also utilized Density functional theory calculation (DFT) to investigate the photocatalytic degradation mechanism in this reaction process. The multiple characterization findings demonstrated that K/Ag composite catalyst was successfully synthesized using Ag3PO4 and KBiO3, and it displayed excellent absorption for visible light. The photocatalytic results confirmed that K/Ag catalyst greatly promoted the degradation of MB under visible light. The first-order reaction kinetics model could satisfactorily describe the apparent photocatalytic degradation process in this system. In addition, adding electron capture agents to the photocatalytic system highly decreased the degradation efficiencies of target pollutant. Moreover, K/Ag composite catalyst exhibited perfect photocatalyst stability after recycling three times. Through calculating the band structure, Density of States (DOS) and work function, KBiO3 and Ag3PO4 could be considered as n type and p type semiconductor material, respectively. When the composite catalyst was exposed to light, the light-excited electrons would be appeared in both the conduction bands. Furthermore, the transfer trend of electrons and holes made photogenerated electrons concentrate on the conduction band of n type KBiO3, and photogenerated holes concentrate on the valence band of p type Ag3PO4, and thereby greatly improve the photocatalytic efficiency.
{"title":"Synthesis of KBiO3/Nano-Ag3PO4 Composite Photocatalyst and its Application for Degradation of Organic Pollutant under visible light","authors":"T. Cheng, Chen Chen, Chen-Xi Ye, Weifang Xie, Xiao Zhang, Tian Yuan","doi":"10.30492/IJCCE.2021.521915.4491","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.521915.4491","url":null,"abstract":"In this work, a novel composite photocatalyst, KBiO3/nano-Ag3PO4 (K/Ag catalyst), was synthesized, and efficiently degraded methylene blue (MB) under visible light. The various properties of photocatalyst were measured by modern analytical techniques, such as XRD, FT-IR, SEM, XPS, and UV-Vis. We also utilized Density functional theory calculation (DFT) to investigate the photocatalytic degradation mechanism in this reaction process. The multiple characterization findings demonstrated that K/Ag composite catalyst was successfully synthesized using Ag3PO4 and KBiO3, and it displayed excellent absorption for visible light. The photocatalytic results confirmed that K/Ag catalyst greatly promoted the degradation of MB under visible light. The first-order reaction kinetics model could satisfactorily describe the apparent photocatalytic degradation process in this system. In addition, adding electron capture agents to the photocatalytic system highly decreased the degradation efficiencies of target pollutant. Moreover, K/Ag composite catalyst exhibited perfect photocatalyst stability after recycling three times. Through calculating the band structure, Density of States (DOS) and work function, KBiO3 and Ag3PO4 could be considered as n type and p type semiconductor material, respectively. When the composite catalyst was exposed to light, the light-excited electrons would be appeared in both the conduction bands. Furthermore, the transfer trend of electrons and holes made photogenerated electrons concentrate on the conduction band of n type KBiO3, and photogenerated holes concentrate on the valence band of p type Ag3PO4, and thereby greatly improve the photocatalytic efficiency.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"39 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78457701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-01DOI: 10.30492/IJCCE.2021.135890.4317
A. Murugesan
End-of-Life Vehicles (ELVs) in India are often recycled by car breaking yards operating in the informal sector. In the absence of well-established, state-of-the-art ELV mechanisms, their work – ensures crucial recycling of ELVs. Multiple qualitative analysis methods, such as desk study, literature review, and field visits, are utilized. Our study shows the following: car breaking yards frequently work in an inefficient manner causing environmental hazards and health risks; the replacement policy adopted during vehicle servicing by Original Equipment Manufacturers and Authorized Dealers results in inefficient material use; Informal actors such as Private workshop owners and Reconditioning shops enable significant savings in material and costs, partly by substituting capital and energy with labour. We propose an inclusive 3R (reuse, recondition, and recycle) framework, which integrates various informal actors involved in ELV recycling. This sustainability-oriented framework ensures that the components and materials circulate in a closed loop.
{"title":"An Inclusive and Effective End-of-Life Vehicle Recycling System in India: Balancing Economy and Ecology from Grave to Cradle","authors":"A. Murugesan","doi":"10.30492/IJCCE.2021.135890.4317","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.135890.4317","url":null,"abstract":"End-of-Life Vehicles (ELVs) in India are often recycled by car breaking yards operating in the informal sector. In the absence of well-established, state-of-the-art ELV mechanisms, their work – ensures crucial recycling of ELVs. Multiple qualitative analysis methods, such as desk study, literature review, and field visits, are utilized. Our study shows the following: car breaking yards frequently work in an inefficient manner causing environmental hazards and health risks; the replacement policy adopted during vehicle servicing by Original Equipment Manufacturers and Authorized Dealers results in inefficient material use; Informal actors such as Private workshop owners and Reconditioning shops enable significant savings in material and costs, partly by substituting capital and energy with labour. We propose an inclusive 3R (reuse, recondition, and recycle) framework, which integrates various informal actors involved in ELV recycling. This sustainability-oriented framework ensures that the components and materials circulate in a closed loop.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"69 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87512143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-01DOI: 10.30492/IJCCE.2021.525905.4601
V. SureshKumarM., M. VinoliaThamilarasi, P. A.K.
The palm fruit husk, an agricultural solid waste does not adsorb Mo(VI). The intent of this endeavor was to estimate the adsorption capacity of the SAPFH towards Mo (VI) in wastewater. Hence the surface was altered using a surface activating group, cetyl trimethyl ammonium bromide (CTAB). The husk of the palm fruit, whose surface was modified, was subjected to evaluate the extent of extracting molybdenum that is present in aqueous solution. The maximal removal of molybdenum occurs at pH 2.0. The adsorbent dose necessary for the maximum adsorption of MoO42- was lesser for wastewater than for pure aqueous solutions. MoO42- took longer time to attain equilibrium at high concentrations. The stability results were suited with Langmuir, Freundlich and Dubinin-Raduskevich adsorption isotherms models. Dynamic investigation revealed that the uptake obeyed pseudo second order kinetic effigy. The adsorption of adsorbates did not change significantly with increase in temperature. Desorption of Mo (VI) showed that it is possible to retrieve Mo (VI) from the spent adsorbent. The influence of accompanying negative ions such as chloride, phosphate, sulphate and chromate on the Mo (VI) uptake was explored and the anions compete with Mo(VI) ions.
{"title":"Adsorption of Molybdenum from Wastewater by Surface Altered Agricultural Solid Waste","authors":"V. SureshKumarM., M. VinoliaThamilarasi, P. A.K.","doi":"10.30492/IJCCE.2021.525905.4601","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.525905.4601","url":null,"abstract":"The palm fruit husk, an agricultural solid waste does not adsorb Mo(VI). The intent of this endeavor was to estimate the adsorption capacity of the SAPFH towards Mo (VI) in wastewater. Hence the surface was altered using a surface activating group, cetyl trimethyl ammonium bromide (CTAB). The husk of the palm fruit, whose surface was modified, was subjected to evaluate the extent of extracting molybdenum that is present in aqueous solution. The maximal removal of molybdenum occurs at pH 2.0. The adsorbent dose necessary for the maximum adsorption of MoO42- was lesser for wastewater than for pure aqueous solutions. MoO42- took longer time to attain equilibrium at high concentrations. The stability results were suited with Langmuir, Freundlich and Dubinin-Raduskevich adsorption isotherms models. Dynamic investigation revealed that the uptake obeyed pseudo second order kinetic effigy. The adsorption of adsorbates did not change significantly with increase in temperature. Desorption of Mo (VI) showed that it is possible to retrieve Mo (VI) from the spent adsorbent. The influence of accompanying negative ions such as chloride, phosphate, sulphate and chromate on the Mo (VI) uptake was explored and the anions compete with Mo(VI) ions.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"68 1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89898876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-01DOI: 10.30492/IJCCE.2021.138770.4408
S. Agarry, F. N. Osuolale, O. Agbede, A. Ajani, T. Afolabi, O. Ogunleye, F. Ajuebor
There are no literature data on the effects of air velocity and relative humidity on moisture diffusivity, mass transfer coefficient, and energy-exergy analysis of chili pepper during cabinet-tray hot-air drying. This study tends to address this gap by presenting comprehensive drying kinetic, energy, and exergy analyses of a cabinet-tray hot-air drying for red chili pepper. Drying was conducted at varying levels of air temperature (40-70 oC), air velocity (0.5-2.0 m/s), and relative humidity (60-75%). The effect of drying conditions on drying time, drying coefficient, lag factor, drying efficiency, moisture ratio, effective moisture diffusivity, mass transfer coefficient, total energy consumption (TEC), specific energy consumption (SEC), energy utilization ratio (EUR), heat loss, energy efficiency, exergy loss, exergy efficiency, exergetic improvement potential (EIP), and exergy sustainability index (ESI)) was evaluated. Five different mass transfer models (Dincer-Dost, Bi-Di, Bi-S, Bi-G, and Bi-Re) were applied to determine the mass transfer parameters. A new drying mathematical model was developed for the prediction of drying kinetic, energy, and exergy parameters. Effective moisture diffusivity values of 1.58×10–8 - 5.10×10–8 m2/s and mass transfer coefficient values of 0.053×10–6 - 8.79×10–6 m/s over the drying conditions range were respectively obtained. The TEC, SEC, and EUR achieved over the range of drying conditions in the course of drying were in the range of 43.56-77.36 MJ, 49.0-87.02 MJ/kg, and 0.035-0.325, respectively. Heat loss and exergy loss varied from 0.16 to 2.39 MJ and from 0.026 to 0.622 kW, respectively. Drying, energy, and exergetic efficiency values obtained varied in the range of 2.80-8.25%, 2.69-7.91%, and 73-94.5%, respectively. EIP and the ESI values varied from 0.0068-0.114 kW and 3.70-18.18, respectively. The developed multivariate linear regression model provided an innovative model to predict drying kinetic, energy, and exergy parameters.
{"title":"Mass Transfer, Energy-Exergy Analysis, and Mathematical Modeling of Chili Pepper during Drying","authors":"S. Agarry, F. N. Osuolale, O. Agbede, A. Ajani, T. Afolabi, O. Ogunleye, F. Ajuebor","doi":"10.30492/IJCCE.2021.138770.4408","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.138770.4408","url":null,"abstract":"There are no literature data on the effects of air velocity and relative humidity on moisture diffusivity, mass transfer coefficient, and energy-exergy analysis of chili pepper during cabinet-tray hot-air drying. This study tends to address this gap by presenting comprehensive drying kinetic, energy, and exergy analyses of a cabinet-tray hot-air drying for red chili pepper. Drying was conducted at varying levels of air temperature (40-70 oC), air velocity (0.5-2.0 m/s), and relative humidity (60-75%). The effect of drying conditions on drying time, drying coefficient, lag factor, drying efficiency, moisture ratio, effective moisture diffusivity, mass transfer coefficient, total energy consumption (TEC), specific energy consumption (SEC), energy utilization ratio (EUR), heat loss, energy efficiency, exergy loss, exergy efficiency, exergetic improvement potential (EIP), and exergy sustainability index (ESI)) was evaluated. Five different mass transfer models (Dincer-Dost, Bi-Di, Bi-S, Bi-G, and Bi-Re) were applied to determine the mass transfer parameters. A new drying mathematical model was developed for the prediction of drying kinetic, energy, and exergy parameters. Effective moisture diffusivity values of 1.58×10–8 - 5.10×10–8 m2/s and mass transfer coefficient values of 0.053×10–6 - 8.79×10–6 m/s over the drying conditions range were respectively obtained. The TEC, SEC, and EUR achieved over the range of drying conditions in the course of drying were in the range of 43.56-77.36 MJ, 49.0-87.02 MJ/kg, and 0.035-0.325, respectively. Heat loss and exergy loss varied from 0.16 to 2.39 MJ and from 0.026 to 0.622 kW, respectively. Drying, energy, and exergetic efficiency values obtained varied in the range of 2.80-8.25%, 2.69-7.91%, and 73-94.5%, respectively. EIP and the ESI values varied from 0.0068-0.114 kW and 3.70-18.18, respectively. The developed multivariate linear regression model provided an innovative model to predict drying kinetic, energy, and exergy parameters.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"84 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76634208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-31DOI: 10.30492/IJCCE.2021.523324.4531
S. Abghari, A. Nickfarjam, F. Torabi
The delayed Coker process as an upgrading process has main impact on the productivity of the Refinery Complexes. To determine the impact of different operating conditions on the product yield distribution of the delayed coking process, several experiments were designed and conducted in a prefabricated pilot plant. The experiments were conducted on different Iranian vacuum residues at temperatures ranging from 420°C to 480°C and at atmospheric pressure. Reaction times were within the range of 5-120 minutes. A four lumps kinetic model has been developed based on the experimental results. The lumps—which included Volatile products, coke, feed, and an intermediate phase between coke and feed—were defined to precisely monitor the yield distribution of products throughout the reaction time. The feedstocks utilized were three different vacuum residues and their blends. The mixtures were produced by using different mixing ratios of the three vacuum residues. The Statistical analysis shows that this model has R-squared, RMSE, SSE, and MRE equal to 0.99, 0.022, 0.08, and 3.537%, respectively. This shows that the developed model is sufficiently accurate. The experimental and modeling results in this research reveal that by increasing the temperature, the yield of coke and gas is abated. However, the yield of the distillate is escalated. This investigation illustrates that the production of an intermediate reaction has the highest amount of activation energy in comparison with the other reactions. Also, the results indicate that the production reaction rate of coke has the highest amount in comparison with other reactions.
{"title":"Prediction of product distribution in the delayed coking of Iranian vacuum residue","authors":"S. Abghari, A. Nickfarjam, F. Torabi","doi":"10.30492/IJCCE.2021.523324.4531","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.523324.4531","url":null,"abstract":"The delayed Coker process as an upgrading process has main impact on the productivity of the Refinery Complexes. To determine the impact of different operating conditions on the product yield distribution of the delayed coking process, several experiments were designed and conducted in a prefabricated pilot plant. The experiments were conducted on different Iranian vacuum residues at temperatures ranging from 420°C to 480°C and at atmospheric pressure. Reaction times were within the range of 5-120 minutes. A four lumps kinetic model has been developed based on the experimental results. The lumps—which included Volatile products, coke, feed, and an intermediate phase between coke and feed—were defined to precisely monitor the yield distribution of products throughout the reaction time. The feedstocks utilized were three different vacuum residues and their blends. The mixtures were produced by using different mixing ratios of the three vacuum residues. The Statistical analysis shows that this model has R-squared, RMSE, SSE, and MRE equal to 0.99, 0.022, 0.08, and 3.537%, respectively. This shows that the developed model is sufficiently accurate. The experimental and modeling results in this research reveal that by increasing the temperature, the yield of coke and gas is abated. However, the yield of the distillate is escalated. This investigation illustrates that the production of an intermediate reaction has the highest amount of activation energy in comparison with the other reactions. Also, the results indicate that the production reaction rate of coke has the highest amount in comparison with other reactions.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"74 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80476563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-31DOI: 10.30492/IJCCE.2021.527475.4657
A. Madhi, B. S. Hadavand
Wool proteins have various chemical active groups which could create chemical reactions and bonds with functional groups existent in different substances. Hence, to have special features and competencies, one could perform surface modification of wool fibers using various chemical composites. This paper aims mainly to achieve surface modification of wool fibers by chitosan-nitrogen doped graphene quantum dots (Ch-NGQDs) as bio-based nanocomposites, and to investigate its consequent effects on the various properties of wool fibers such as color fastness, colorimetric parameters and antibacterial activities. To do this, first, Ch-NGQDs nanocomposites were synthesized including certain weight percentages. Then, wool fibers were modified by prepared nanocomposites. In order to characterize and confirm the synthesis of NGQDs and Ch-NGQDs nanocomposites, FT-IR, XRD, HR-TEM, UV-visible and photoluminescence spectrometry were applied. Subsequently, surface modification of wool fibers by Ch-NGQDs nanocomposites was studied using FESEM spectrometry, analysis of fastness properties, colorimetric parameters and Mueller-Hinton broth antibacterial test. Findings showed that surface modification of wool fibers by Ch-NGQDs nanocomposites led to partial improvement in their color fastness and colorimetric parameters. Additionally, surface modification of wool fibers resulted in elimination of Staphylococcus aureus bacteria.
{"title":"Bio-based Surface Modification of Wool Fibers by Chitosan-graphene Quantum Dots Nanocomposites","authors":"A. Madhi, B. S. Hadavand","doi":"10.30492/IJCCE.2021.527475.4657","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.527475.4657","url":null,"abstract":"Wool proteins have various chemical active groups which could create chemical reactions and bonds with functional groups existent in different substances. Hence, to have special features and competencies, one could perform surface modification of wool fibers using various chemical composites. This paper aims mainly to achieve surface modification of wool fibers by chitosan-nitrogen doped graphene quantum dots (Ch-NGQDs) as bio-based nanocomposites, and to investigate its consequent effects on the various properties of wool fibers such as color fastness, colorimetric parameters and antibacterial activities. To do this, first, Ch-NGQDs nanocomposites were synthesized including certain weight percentages. Then, wool fibers were modified by prepared nanocomposites. In order to characterize and confirm the synthesis of NGQDs and Ch-NGQDs nanocomposites, FT-IR, XRD, HR-TEM, UV-visible and photoluminescence spectrometry were applied. Subsequently, surface modification of wool fibers by Ch-NGQDs nanocomposites was studied using FESEM spectrometry, analysis of fastness properties, colorimetric parameters and Mueller-Hinton broth antibacterial test. Findings showed that surface modification of wool fibers by Ch-NGQDs nanocomposites led to partial improvement in their color fastness and colorimetric parameters. Additionally, surface modification of wool fibers resulted in elimination of Staphylococcus aureus bacteria.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"47 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79746472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-31DOI: 10.30492/IJCCE.2021.528741.4687
L. Nateghi, F. Kavian, M. Eshaghi, S. Movahhed
Mahyaveh is the name of a traditional Iranian fish sauce made from the fermentation of small and low-consumption fish, anchovies, and sardines, and contains essential amino acids, vitamins, salts, metal ions, and desirable fatty acids such as Docosahexaenoic acid and Eicosapentaenoic acid. Production conditions and fermentation time can be effective in improving nutritional value and improving its health capabilities. The general purpose of this study was to compare and evaluate the physicochemical, nitrogen, microbial, antioxidant, bioactive, and sensory peptides of Mahyaveh prepared in optimal conditions with traditional Mahyaveh. The results showed that the amount of fat, dry matter, ash, fiber, and carbohydrates of Mahyaveh prepared under optimal conditions was significantly (p≤0.05) higher than traditional Mahyaveh. The amount of moisture and protein of traditional Mahyaveh was significantly (p≤0.05) higher than Mahyaveh prepared in optimal conditions. The amount of total nitrogen, formalin nitrogen, amino nitrogen, proteolysis of essential amino acids, total phenol, and sensory evaluation score in Mahyaveh prepared under optimal conditions was significantly (p≤0.05) higher than the traditional Mahyaveh sample. The amount of trimethylamine, volatile nitrogen, IC50, and microbial load of Mahyaveh prepared under optimal conditions was significantly (p≤0.05) lower than traditional Mahyaveh. The results of this study showed that by optimizing the production conditions of Mahyaveh, fish sauces with higher nutritional value, greater safety, and more desirable sensory properties can be produced than traditional Mahyaveh.
{"title":"Comparison and study of physicochemical, nitrogen, microbial, antioxidant, bioactive, and sensory properties of Mahyaveh prepared in optimal conditions with traditional Mahyaveh","authors":"L. Nateghi, F. Kavian, M. Eshaghi, S. Movahhed","doi":"10.30492/IJCCE.2021.528741.4687","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.528741.4687","url":null,"abstract":"Mahyaveh is the name of a traditional Iranian fish sauce made from the fermentation of small and low-consumption fish, anchovies, and sardines, and contains essential amino acids, vitamins, salts, metal ions, and desirable fatty acids such as Docosahexaenoic acid and Eicosapentaenoic acid. Production conditions and fermentation time can be effective in improving nutritional value and improving its health capabilities. The general purpose of this study was to compare and evaluate the physicochemical, nitrogen, microbial, antioxidant, bioactive, and sensory peptides of Mahyaveh prepared in optimal conditions with traditional Mahyaveh. The results showed that the amount of fat, dry matter, ash, fiber, and carbohydrates of Mahyaveh prepared under optimal conditions was significantly (p≤0.05) higher than traditional Mahyaveh. The amount of moisture and protein of traditional Mahyaveh was significantly (p≤0.05) higher than Mahyaveh prepared in optimal conditions. The amount of total nitrogen, formalin nitrogen, amino nitrogen, proteolysis of essential amino acids, total phenol, and sensory evaluation score in Mahyaveh prepared under optimal conditions was significantly (p≤0.05) higher than the traditional Mahyaveh sample. The amount of trimethylamine, volatile nitrogen, IC50, and microbial load of Mahyaveh prepared under optimal conditions was significantly (p≤0.05) lower than traditional Mahyaveh. The results of this study showed that by optimizing the production conditions of Mahyaveh, fish sauces with higher nutritional value, greater safety, and more desirable sensory properties can be produced than traditional Mahyaveh.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"10 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89564983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-31DOI: 10.30492/IJCCE.2021.116590.3821
Mohammad Reza Mohammadi, Shahab Bohluli, A. Javid, A. Ghorbanpour, Donya Doostkamel, Nahid Ettefaghi, N. Zahedi, H. Tavakkoli, N. Razzaghi
A few 2-aryl-1H-phenanthro [9,10-d] imidazoles were synthesized and assessed for their cytotoxicity against MCF-7, HepG2, and AGS cell lines using MTT assay. Cellular assessments showed that phenanthroimidazoles were extremely potent cytotoxic agents (sub-nanomolar IC50s). Maximum effect was recorded for para-N-phenyl acetamide containing derivative against AGS cells (IC50=0.07 nM). It was also revealed that phenanthroimidazole derivatives showed better cytotoxicity against MCF-7 and AGS cells when compared to HepG2 cells. Minimum cytotoxicity was reported for para-methylphenyl derivative within HepG2 cancer cells (IC50 7608.07 nM). Structure activity relationship studies indicated that incorporation of nitrogen/oxygen containing polar groups such as N-acetyl or nitro into para/meta positions of phenyl ring significantly enhanced the cytotoxicity against AGS cells. Similar trend was observed in meta-nitro derivatives vs MCF-7 cells. It was revealed that even the least potent compound exhibited cytotoxic activity in the range of low micromolar IC50. Results of this study proposed 2-aryl-1H-phenanthro [9,10-d] imidazoles as privileged structures for further in vivo studies.
{"title":"Unveiling the Full Potential of 2-aryl-1H-phenanthro [9,10-d] imidazoles as Cytotoxic Agents vs AGS, HepG2 and MCF-7 Cell lines","authors":"Mohammad Reza Mohammadi, Shahab Bohluli, A. Javid, A. Ghorbanpour, Donya Doostkamel, Nahid Ettefaghi, N. Zahedi, H. Tavakkoli, N. Razzaghi","doi":"10.30492/IJCCE.2021.116590.3821","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.116590.3821","url":null,"abstract":"A few 2-aryl-1H-phenanthro [9,10-d] imidazoles were synthesized and assessed for their cytotoxicity against MCF-7, HepG2, and AGS cell lines using MTT assay. Cellular assessments showed that phenanthroimidazoles were extremely potent cytotoxic agents (sub-nanomolar IC50s). Maximum effect was recorded for para-N-phenyl acetamide containing derivative against AGS cells (IC50=0.07 nM). It was also revealed that phenanthroimidazole derivatives showed better cytotoxicity against MCF-7 and AGS cells when compared to HepG2 cells. Minimum cytotoxicity was reported for para-methylphenyl derivative within HepG2 cancer cells (IC50 7608.07 nM). Structure activity relationship studies indicated that incorporation of nitrogen/oxygen containing polar groups such as N-acetyl or nitro into para/meta positions of phenyl ring significantly enhanced the cytotoxicity against AGS cells. Similar trend was observed in meta-nitro derivatives vs MCF-7 cells. It was revealed that even the least potent compound exhibited cytotoxic activity in the range of low micromolar IC50. Results of this study proposed 2-aryl-1H-phenanthro [9,10-d] imidazoles as privileged structures for further in vivo studies.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"15 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78913596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-09DOI: 10.30492/IJCCE.2021.131946.4260
S. Hashemi, Abdolhamid Khodadadi, Mahmood Dinmohammad
Etodolac, Lamotrigine, diazepam, and clonazepamine are four important drugs in the pharmaceutical industry that optimizing the solvent concentration in the least amount can reduce the cost and toxicity of these drugs. Due to the lack of thermodynamic modeling based on the activity coefficient equation in previous studies for solubility of Etodolac, Lamotrigine, diazepam, and clonazepamine in aqueous solution, in this study, based on thermodynamic equations and UNIQUAC model, their solubility is optimized with the presence of water and ethanol. Based on the objective function defined, the error rate of the model optimization value was acceptable for each system. The results of this study can be used to better understand the intermolecular reaction of Etodolac, Lamotrigine diazepam, and clonazepamine in the presence of ethanol and water solvents. Also, the importance of the optimization results of this study in order to design a computer program to predict the solubility of these drugs is significant.
{"title":"Solubility Prediction of Etodolac, Lamotrigine, Diazepam and Clonazepamin in Cosolvent Mixtures Using UNIQUAC Model","authors":"S. Hashemi, Abdolhamid Khodadadi, Mahmood Dinmohammad","doi":"10.30492/IJCCE.2021.131946.4260","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.131946.4260","url":null,"abstract":"Etodolac, Lamotrigine, diazepam, and clonazepamine are four important drugs in the pharmaceutical industry that optimizing the solvent concentration in the least amount can reduce the cost and toxicity of these drugs. Due to the lack of thermodynamic modeling based on the activity coefficient equation in previous studies for solubility of Etodolac, Lamotrigine, diazepam, and clonazepamine in aqueous solution, in this study, based on thermodynamic equations and UNIQUAC model, their solubility is optimized with the presence of water and ethanol. Based on the objective function defined, the error rate of the model optimization value was acceptable for each system. The results of this study can be used to better understand the intermolecular reaction of Etodolac, Lamotrigine diazepam, and clonazepamine in the presence of ethanol and water solvents. Also, the importance of the optimization results of this study in order to design a computer program to predict the solubility of these drugs is significant.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"67 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74951240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-08-09DOI: 10.30492/IJCCE.2021.525240.4583
M. Ajam, H. Mohammadiun, Mohammad Hossein Dibaee Bonab, M. Mohammadiun
Using the Combined Heat and Power (CHP) systems are known as one of the most effective ways to raise the power coefficient and reduce fuel consumption and operational costs. In this study, a CHP system with the prime movers of a gas turbine and a horizontal axis wind turbine under the strategy of providing electric charge has been investigated based on the first and second laws of thermodynamics. This study aims to evaluate the effect of a wind turbine on the CHP system. The results show that the proposed CHP system has significant advantages compared to the CHP system working without the wind turbine. The best operating condition for the wind turbine is at the wind speed of 12 m/s, the pitch angle of 5ο and the tip speed ratio of 3. Moreover, the effects of the wind speed and tip speed ratio on the exergy efficiency of the total system become considerable when the gas turbine works at the high-pressure ratios (more than 10) and the combustion chamber temperature below 1250οc. Also, it is shown this integrated system can reduce operational costs and fuel consumption by 55 % and 60%, respectively. Finally, regarding the interest rate, the payback period will be equal to 5.4 years.
{"title":"Energy, Exergy and economic analyses of a combined heat and power generation systems with a gas turbine and a horizontal axis wind turbine","authors":"M. Ajam, H. Mohammadiun, Mohammad Hossein Dibaee Bonab, M. Mohammadiun","doi":"10.30492/IJCCE.2021.525240.4583","DOIUrl":"https://doi.org/10.30492/IJCCE.2021.525240.4583","url":null,"abstract":"Using the Combined Heat and Power (CHP) systems are known as one of the most effective ways to raise the power coefficient and reduce fuel consumption and operational costs. In this study, a CHP system with the prime movers of a gas turbine and a horizontal axis wind turbine under the strategy of providing electric charge has been investigated based on the first and second laws of thermodynamics. This study aims to evaluate the effect of a wind turbine on the CHP system. The results show that the proposed CHP system has significant advantages compared to the CHP system working without the wind turbine. The best operating condition for the wind turbine is at the wind speed of 12 m/s, the pitch angle of 5ο and the tip speed ratio of 3. Moreover, the effects of the wind speed and tip speed ratio on the exergy efficiency of the total system become considerable when the gas turbine works at the high-pressure ratios (more than 10) and the combustion chamber temperature below 1250οc. Also, it is shown this integrated system can reduce operational costs and fuel consumption by 55 % and 60%, respectively. Finally, regarding the interest rate, the payback period will be equal to 5.4 years.","PeriodicalId":14572,"journal":{"name":"Iranian Journal of Chemistry & Chemical Engineering-international English Edition","volume":"40 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73050739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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