Nasrin Khodapanah - Academia.edu (original) (raw)
Papers by Nasrin Khodapanah
Ecology, Environment and Conservation, 2023
LWT - Food Science and Technology, 2014
Materials Science Forum, 2022
Plastic, a non-biodegradable material has always been a concern to the environment and people. Th... more Plastic, a non-biodegradable material has always been a concern to the environment and people. This single-use item generates waste to landfills and it persists for centuries once disposed. The urge of transforming such material into a highly valuable product has sought attention from many researchers. This study emphasizes on a nanotechnological approach to synthesize vertically-aligned carbon nanotubes (CNTs) on a substrate template using commercially available plastic bags as carbon precursor. CNTs are grown inside a hexagonally arranged nanoporous anodic alumina membranes (NAAMs). CNTs are liberated by wet chemical etching to dissolve the alumina matrix. The resulting CNTs are used as adsorption media filters for water treatment purpose. The high adsorption affinity towards heavy metals, organic matters and microbes, ability to antifouling and self-cleaning function have made CNTs a better choice over others. This article briefly discusses the catalyst-free synthesis, growth mec...
ACS Omega, 2020
This present study investigated the effect of Captisol, a chemically modified cyclodextrin, on th... more This present study investigated the effect of Captisol, a chemically modified cyclodextrin, on the in vitro dissolution of glimepiride. We prepared glimepiride−Captisol complexes of different mass ratios (1:1, 1:2, and 1:3 w/w) by a physical mixing or freeze-drying technique, and found that complexation with Captisol enhanced the water solubility of glimepiride. Molecular docking and dynamic simulation predicted complex formation; at the same time, Fourier transform infrared spectroscopy, differential scanning calorimetry, powder X-ray diffractometry, and scanning electron microscope indicated molecular interactions that support complexation. We also found that an inclusion complex was better than a physical mixture in enhancing the complexation of glimepiride with Captisol and enhancing water solubility. Phase solubility study of the glimepiride−Captisol complex showed an A L-type profile, implying the formation of a 1:1 inclusion complex. The study also revealed that pH influenced the stability of the complex because the stability constant of the glimepiride−Captisol complex was higher in distilled water of pH ∼6.0 than in phosphate buffer of pH 7.2.
Journal of Engineering and Applied Sciences, 2019
Journal of Environmental Chemical Engineering, 2015
Abstract In this research, porous carbon rod-shaped has been successfully fabricated by using alm... more Abstract In this research, porous carbon rod-shaped has been successfully fabricated by using almond shell as a lignocellulosic starting material. The porous carbon rods were prepared using powdered almond shell plus chitosan as a binder that both of ingredients are agriculture and marine wastes. This homogeneous and readily moldable mixture was next forced through a stainless-steel cylindrical die using a uniaxial press at 30 °C while applying a pressure of 100 kPa during the 4 min of the run. The dried rods were later carbonized at different temperatures ranging from 500 to 800 °C and were then physically activated in an oxidizing gas flow (O 2 /Ar). This study well demonstrated that surface area increases with an increase in the carbonization temperature. While almond shell has low specific surface area and pore volume, the almond shell rods take advantage of an increased surface area from 43 to 67 m 2 /g and a pore volume of less than 0.1 cm 3 /g when the carbonization temperature increased from 500 to 800 °C. The surface area and pore volume of the physically activated rods have increased by 14% and 23%, respectively compared to non-activated ones. The stability of rods resulting from properties such as inheriting crack-free, crumbling and peeling off was tested using aqueous solution of methylene blue. By applying solid wastes, the porous carbon rod shaped in both liquid and gaseous phases, can be considered as a promising adsorbent and contributing to reach a clean environmental. The adsorption capacities of methylene blue and phenol demonstrated that porous carbon rod-shaped has a moderate adsorption capacity.
![Research paper thumbnail of Experimental kinetic analysis of ethylene absorption in ionic liquid [Bmim]NO3 with dissolved AgNO3 by a semi-continuous process](https://attachments.academia-assets.com/96488245/thumbnails/1.jpg)
](Chemical Engineering Journal, 2010
The ability of silver ions to form reversible-bond complexation with unsaturated hydrocarbons can... more The ability of silver ions to form reversible-bond complexation with unsaturated hydrocarbons can be utilized to separate olefins from paraffins using a solution of AgNO 3 dissolved in an ionic liquid (IL). The process is suggested because of zero vapor pressure of the solvent, which results in higher purity of the separated product in comparison to when an aqueous AgNO 3 solution is applied. In the present study, 1-butyl-3-methylimidazolium nitrate ([Bmim]NO 3), an IL that can dissolve AgNO 3 , is applied as the solvent. The absorption of ethylene from a gaseous mixture of ethylene/ethane with constant flowrate in the silver nitrate dissolved media is investigated in silver nitrate concentrations of 1, 2 and 5 M, and temperatures within the range of 5-35 • C. The absolute absorptivity of ethylene is increased from 1.12 to 5.68 g l −1 at 25 • C when the concentration of AgNO 3 is increased from 1 to 5 M. Maximum absorption of ethylene is found at near ambient temperatures (15 • C). The absorption selectivity of ethylene to ethane increases with increase of AgNO 3 concentration and decrease with increasing temperature. The capacity of ethylene absorption in the reactive media at 25 • C and 5 M concentration of AgNO 3 is about 0.43 of that for the aqueous AgNO 3 solution. The results of an applied theoretical model for prediction of total ethylene absorption can be verified by the experimental results.
The Canadian Journal of Chemical Engineering, 2009
Ethylene absorption from an ethylene-ethane gaseous mixture in the silver nitrate solution is stu... more Ethylene absorption from an ethylene-ethane gaseous mixture in the silver nitrate solution is studied at different temperatures and concentrations. Unlike the previous studies, in which the absorption was studied by batch processes, a semi-continuous process is applied in the present research. The results show that increase in temperature reduces the amount of absorbed ethylene and absorption time. The amount of absorbed ethylene is increased in solutions with higher concentrations of AgNO 3 , whereas the mole ratio of absorbed ethylene per silver nitrate is decreased by increasing the AgNO 3 concentration. Total absorption is modelled as a function of the temperature and concentration of absorbing solution. The estimated values from the model are in good agreement with the experimental data. L'absorption du mélange gazeux de l'éthylène-éthane dans une solution de nitrate d'argent estétudiéeà différentes températures et concentrations. Contrairement auxétudes antérieures lors desquelles l'absorptionétaitétudiée par procédés en lots, un procédé semi-continu a servi pour la recherche actuelle. Les résultats indiquent qu'une hausse de température réduit la quantité d'éthylène absorbée et le temps d'absorption. La quantité d'éthylène absorbée est augmentée dans les solutions ayant des concentrations de AgNO3 plusélevées alors que le ratio de moles d'éthylène absorbés par nitrate d'argent est diminué en augmentant la concentration de AgNO3. L'absorption totale est modélisée en tant que fonction de la température et de la concentration de la solution absorbante. Les valeurs estiméesà partir du modèle appuient les données expérimentales.
RESEARCH JOURNAL OF CHEMISTRY AND ENVIRONMENT
Water treatment processes in developing countries typically include coagulation and flocculation ... more Water treatment processes in developing countries typically include coagulation and flocculation and often use alum as the coagulant. Coagulation is a critical step in drinking water treatment because of removing the colloidal particles as well as pathogens that are often attached to the particles. However, the cost of the imported chemicals in hard currency has caused to consider the natural coagulants as a promising alternative. In the present study, turbidity removal of Moringa oleifera, Jatropha curcas, chitosan, dragon fruit foliage and alum were compared using surface turbid water. The efficacy of four bio-coagulants has been tested based on some critical parameters including dosages of coagulant, pH of turbid water and change in pH value of finished water. All studied coagulants obviously possessed positive coagulation abilities.
European Journal of …, 2009
The Hajeb Layoun-Jelma basin, located in the central Tunisia, is the principal source of water su... more The Hajeb Layoun-Jelma basin, located in the central Tunisia, is the principal source of water supply for Sidi Bouzid and Sfax region. The over-abstraction from this groundwater, since 1970, and the intensive agriculture activities led to the degradation of the water quantity and quality. The quality evaluation for this groundwater is very important tool for sustainable development and decision for water management. A total of 28 groundwater samples, from shallow, springs, and deep aquifers, were collected, storage and analyzed to evaluate its quality suitability for domestic and agriculture purposes using geographic information system and geochemical methods. For the both aquifers, the abundance of cations: Na > Mg > Ca > K, and of anions in the order: Cl > HCO 3 > SO 4. The dominant hydrochemical facies, for the shallow aquifer and springs, are Na-Cl and Ca-Mg-Cl; for the deep aquifer, the geochemical facies are Na-Cl, Ca-Mg-Cl, and Ca-Cl. The comparison of the major parameters and the chemical data with the World Health Organization standards and the national standards indicate that this groundwater is suitable for drinking, except in some samples, with high salinity concentrations. The water quality was assessed, for drinking uses, using "water quality index," "entropy," and "improved water quality index." The results mentioned that the improved water quality index is the best method which indicated that the poor water quality coincide with the Na-Cl water type. The entropy method and the water quality index present the optimistic methods. The irrigation suitability assessment was made using various parameters (SAR, TH, % Na, PI, MH, KR, EC). The results revealed that the majority of samples in Hajeb Layoun-Jelma basin are not appropriate for irrigation uses.
DESALINATION AND WATER TREATMENT, 2018
In this study, the effect of the extraction medium on the properties and efficiency of biocoagula... more In this study, the effect of the extraction medium on the properties and efficiency of biocoagulant, extracted of Jatropha curcas (Jc), in turbidity removal from aqueous solutions has been investigated. The optimized values of NaCl concentration (i.e., NaCl), solution pH and solution temperature were identified to improve the extraction of the coagulant. The optimized conditions were associated with an optimum coagulant dosage and a maximum turbidity removal from the synthetic aqueous solutions. The highest turbidity reduction was achieved with the coagulant extracted at a solution pH of 10 and an extraction temperature of 60°C (pH10/60°C-Jc press cake). Under these conditions, the coagulant dosage required was reduced by 80%-90%, depending on the coagulation pH. At the coagulation pH = 6, the pH10/60°C-Jc press cake well reduced the turbidity by 85%. However, the distilled waterbased extract failed to lower the turbidity. Several analytical techniques were employed to characterize the nature of the active components derived from Jc. SDS-PAGE electrophoresis showed that Jc extract was mainly made up of proteins with molecular weights between 20 and 35 kDa. The optimized extraction conditions significantly improved the efficiency of this promising bio-derived coagulant in turbidity reduction. This study demonstrates the potential employability of these enhanced bio-coagulants. This can be a step ahead in helping with the development of sustainable processes in (waste)water treatment, particularly in tropical regions, for example, Malaysia with an abundant access to Jc.
Ecology, Environment and Conservation, 2023
LWT - Food Science and Technology, 2014
Materials Science Forum, 2022
Plastic, a non-biodegradable material has always been a concern to the environment and people. Th... more Plastic, a non-biodegradable material has always been a concern to the environment and people. This single-use item generates waste to landfills and it persists for centuries once disposed. The urge of transforming such material into a highly valuable product has sought attention from many researchers. This study emphasizes on a nanotechnological approach to synthesize vertically-aligned carbon nanotubes (CNTs) on a substrate template using commercially available plastic bags as carbon precursor. CNTs are grown inside a hexagonally arranged nanoporous anodic alumina membranes (NAAMs). CNTs are liberated by wet chemical etching to dissolve the alumina matrix. The resulting CNTs are used as adsorption media filters for water treatment purpose. The high adsorption affinity towards heavy metals, organic matters and microbes, ability to antifouling and self-cleaning function have made CNTs a better choice over others. This article briefly discusses the catalyst-free synthesis, growth mec...
ACS Omega, 2020
This present study investigated the effect of Captisol, a chemically modified cyclodextrin, on th... more This present study investigated the effect of Captisol, a chemically modified cyclodextrin, on the in vitro dissolution of glimepiride. We prepared glimepiride−Captisol complexes of different mass ratios (1:1, 1:2, and 1:3 w/w) by a physical mixing or freeze-drying technique, and found that complexation with Captisol enhanced the water solubility of glimepiride. Molecular docking and dynamic simulation predicted complex formation; at the same time, Fourier transform infrared spectroscopy, differential scanning calorimetry, powder X-ray diffractometry, and scanning electron microscope indicated molecular interactions that support complexation. We also found that an inclusion complex was better than a physical mixture in enhancing the complexation of glimepiride with Captisol and enhancing water solubility. Phase solubility study of the glimepiride−Captisol complex showed an A L-type profile, implying the formation of a 1:1 inclusion complex. The study also revealed that pH influenced the stability of the complex because the stability constant of the glimepiride−Captisol complex was higher in distilled water of pH ∼6.0 than in phosphate buffer of pH 7.2.
Journal of Engineering and Applied Sciences, 2019
Journal of Environmental Chemical Engineering, 2015
Abstract In this research, porous carbon rod-shaped has been successfully fabricated by using alm... more Abstract In this research, porous carbon rod-shaped has been successfully fabricated by using almond shell as a lignocellulosic starting material. The porous carbon rods were prepared using powdered almond shell plus chitosan as a binder that both of ingredients are agriculture and marine wastes. This homogeneous and readily moldable mixture was next forced through a stainless-steel cylindrical die using a uniaxial press at 30 °C while applying a pressure of 100 kPa during the 4 min of the run. The dried rods were later carbonized at different temperatures ranging from 500 to 800 °C and were then physically activated in an oxidizing gas flow (O 2 /Ar). This study well demonstrated that surface area increases with an increase in the carbonization temperature. While almond shell has low specific surface area and pore volume, the almond shell rods take advantage of an increased surface area from 43 to 67 m 2 /g and a pore volume of less than 0.1 cm 3 /g when the carbonization temperature increased from 500 to 800 °C. The surface area and pore volume of the physically activated rods have increased by 14% and 23%, respectively compared to non-activated ones. The stability of rods resulting from properties such as inheriting crack-free, crumbling and peeling off was tested using aqueous solution of methylene blue. By applying solid wastes, the porous carbon rod shaped in both liquid and gaseous phases, can be considered as a promising adsorbent and contributing to reach a clean environmental. The adsorption capacities of methylene blue and phenol demonstrated that porous carbon rod-shaped has a moderate adsorption capacity.
Chemical Engineering Journal, 2010
The ability of silver ions to form reversible-bond complexation with unsaturated hydrocarbons can... more The ability of silver ions to form reversible-bond complexation with unsaturated hydrocarbons can be utilized to separate olefins from paraffins using a solution of AgNO 3 dissolved in an ionic liquid (IL). The process is suggested because of zero vapor pressure of the solvent, which results in higher purity of the separated product in comparison to when an aqueous AgNO 3 solution is applied. In the present study, 1-butyl-3-methylimidazolium nitrate ([Bmim]NO 3), an IL that can dissolve AgNO 3 , is applied as the solvent. The absorption of ethylene from a gaseous mixture of ethylene/ethane with constant flowrate in the silver nitrate dissolved media is investigated in silver nitrate concentrations of 1, 2 and 5 M, and temperatures within the range of 5-35 • C. The absolute absorptivity of ethylene is increased from 1.12 to 5.68 g l −1 at 25 • C when the concentration of AgNO 3 is increased from 1 to 5 M. Maximum absorption of ethylene is found at near ambient temperatures (15 • C). The absorption selectivity of ethylene to ethane increases with increase of AgNO 3 concentration and decrease with increasing temperature. The capacity of ethylene absorption in the reactive media at 25 • C and 5 M concentration of AgNO 3 is about 0.43 of that for the aqueous AgNO 3 solution. The results of an applied theoretical model for prediction of total ethylene absorption can be verified by the experimental results.
The Canadian Journal of Chemical Engineering, 2009
Ethylene absorption from an ethylene-ethane gaseous mixture in the silver nitrate solution is stu... more Ethylene absorption from an ethylene-ethane gaseous mixture in the silver nitrate solution is studied at different temperatures and concentrations. Unlike the previous studies, in which the absorption was studied by batch processes, a semi-continuous process is applied in the present research. The results show that increase in temperature reduces the amount of absorbed ethylene and absorption time. The amount of absorbed ethylene is increased in solutions with higher concentrations of AgNO 3 , whereas the mole ratio of absorbed ethylene per silver nitrate is decreased by increasing the AgNO 3 concentration. Total absorption is modelled as a function of the temperature and concentration of absorbing solution. The estimated values from the model are in good agreement with the experimental data. L'absorption du mélange gazeux de l'éthylène-éthane dans une solution de nitrate d'argent estétudiéeà différentes températures et concentrations. Contrairement auxétudes antérieures lors desquelles l'absorptionétaitétudiée par procédés en lots, un procédé semi-continu a servi pour la recherche actuelle. Les résultats indiquent qu'une hausse de température réduit la quantité d'éthylène absorbée et le temps d'absorption. La quantité d'éthylène absorbée est augmentée dans les solutions ayant des concentrations de AgNO3 plusélevées alors que le ratio de moles d'éthylène absorbés par nitrate d'argent est diminué en augmentant la concentration de AgNO3. L'absorption totale est modélisée en tant que fonction de la température et de la concentration de la solution absorbante. Les valeurs estiméesà partir du modèle appuient les données expérimentales.
RESEARCH JOURNAL OF CHEMISTRY AND ENVIRONMENT
Water treatment processes in developing countries typically include coagulation and flocculation ... more Water treatment processes in developing countries typically include coagulation and flocculation and often use alum as the coagulant. Coagulation is a critical step in drinking water treatment because of removing the colloidal particles as well as pathogens that are often attached to the particles. However, the cost of the imported chemicals in hard currency has caused to consider the natural coagulants as a promising alternative. In the present study, turbidity removal of Moringa oleifera, Jatropha curcas, chitosan, dragon fruit foliage and alum were compared using surface turbid water. The efficacy of four bio-coagulants has been tested based on some critical parameters including dosages of coagulant, pH of turbid water and change in pH value of finished water. All studied coagulants obviously possessed positive coagulation abilities.
European Journal of …, 2009
The Hajeb Layoun-Jelma basin, located in the central Tunisia, is the principal source of water su... more The Hajeb Layoun-Jelma basin, located in the central Tunisia, is the principal source of water supply for Sidi Bouzid and Sfax region. The over-abstraction from this groundwater, since 1970, and the intensive agriculture activities led to the degradation of the water quantity and quality. The quality evaluation for this groundwater is very important tool for sustainable development and decision for water management. A total of 28 groundwater samples, from shallow, springs, and deep aquifers, were collected, storage and analyzed to evaluate its quality suitability for domestic and agriculture purposes using geographic information system and geochemical methods. For the both aquifers, the abundance of cations: Na > Mg > Ca > K, and of anions in the order: Cl > HCO 3 > SO 4. The dominant hydrochemical facies, for the shallow aquifer and springs, are Na-Cl and Ca-Mg-Cl; for the deep aquifer, the geochemical facies are Na-Cl, Ca-Mg-Cl, and Ca-Cl. The comparison of the major parameters and the chemical data with the World Health Organization standards and the national standards indicate that this groundwater is suitable for drinking, except in some samples, with high salinity concentrations. The water quality was assessed, for drinking uses, using "water quality index," "entropy," and "improved water quality index." The results mentioned that the improved water quality index is the best method which indicated that the poor water quality coincide with the Na-Cl water type. The entropy method and the water quality index present the optimistic methods. The irrigation suitability assessment was made using various parameters (SAR, TH, % Na, PI, MH, KR, EC). The results revealed that the majority of samples in Hajeb Layoun-Jelma basin are not appropriate for irrigation uses.
DESALINATION AND WATER TREATMENT, 2018
In this study, the effect of the extraction medium on the properties and efficiency of biocoagula... more In this study, the effect of the extraction medium on the properties and efficiency of biocoagulant, extracted of Jatropha curcas (Jc), in turbidity removal from aqueous solutions has been investigated. The optimized values of NaCl concentration (i.e., NaCl), solution pH and solution temperature were identified to improve the extraction of the coagulant. The optimized conditions were associated with an optimum coagulant dosage and a maximum turbidity removal from the synthetic aqueous solutions. The highest turbidity reduction was achieved with the coagulant extracted at a solution pH of 10 and an extraction temperature of 60°C (pH10/60°C-Jc press cake). Under these conditions, the coagulant dosage required was reduced by 80%-90%, depending on the coagulation pH. At the coagulation pH = 6, the pH10/60°C-Jc press cake well reduced the turbidity by 85%. However, the distilled waterbased extract failed to lower the turbidity. Several analytical techniques were employed to characterize the nature of the active components derived from Jc. SDS-PAGE electrophoresis showed that Jc extract was mainly made up of proteins with molecular weights between 20 and 35 kDa. The optimized extraction conditions significantly improved the efficiency of this promising bio-derived coagulant in turbidity reduction. This study demonstrates the potential employability of these enhanced bio-coagulants. This can be a step ahead in helping with the development of sustainable processes in (waste)water treatment, particularly in tropical regions, for example, Malaysia with an abundant access to Jc.