Iranian Journal of Chemistry & Chemical Engineering-international English Edition, Dec 1, 2020
Liquid-liquid equilibrium (LLE) data for aqueous two-phase systems (ATPSs) containing sodium di h... more Liquid-liquid equilibrium (LLE) data for aqueous two-phase systems (ATPSs) containing sodium di hydrogen phosphate and poly (ethylene glycols) (PEG) (1500, 2000, 3000, 4000 or 8000 g/mol) have been determined experimentally at different temperatures (298.15 and 308.15 K). The effects of molecular weights of PEG and temperature on the binodal curve were studied. It was found that an increase in PEG molecular weight and temperature led to the binodal curve displacement towards the origin and increasing two-phase region. In order to generate predictions and to optimize the system, Artificial Neural Networks and Support Vector Machines, simple, or in combination with Differential Evolution were employed. The simulation results indicated that the combination that best fits to the experimental data is Support Vector Machines optimized with Differential Evolution, with an average absolute error of 5.97%.
Organophosphate esters (OPEs) are used as additives in various industries. They do not chemically... more Organophosphate esters (OPEs) are used as additives in various industries. They do not chemically bond with the polymeric structure of materials, so they can stay for a long time and have a very adverse effect on the environment. To analyze the development of the prevalence and concentration of OPEs such as TCEP, TCPP, TDCP, TnBP, TPHP, TBOEP, TEHP, TMP, TCIPP, TDCIPP, TMPP, and TDBPP in water resources, a search between January 01, 2000, to April 08, 2021, was followed by a systematic review and meta-analysis. Among of the 888 articles scanned in the identity step, 58 articles containing 2676 samples, 10 countries, and 4 water types were included in the meta-analysis study. Among all studied OPEs, the concentration of TcrP, TCPP, TDCPP, and TnBP were at the top in water resources, with values >715 μg L-1 and lowest average concentrations were obtained for TDBPP and TpeP with values <0.0004 μg L-1. The most polluted area in terms of the concentration of OPEs in water resources was China. Besides, data analysis showed that there only was carcinogenic risk for China. A Monte-Carlo simulation indicated that although these obtained averages are in the same order of magnitude as the acceptable limit, for both adults and children, 95% of the population is at risk.
MXene-based nanomaterials (MBNs) are two-dimensional materials that exhibit a series of sought af... more MXene-based nanomaterials (MBNs) are two-dimensional materials that exhibit a series of sought after properties, including rich surface chemistry, adjustable bandgap structures, high electrical conductivity, hydrophobicity, thermal stability, and large specific surface area. MBNs have an exemplar performance when applied for the degradation of hazardous pollutants with various advanced oxidation processes such as heterogeneous sonocatalysis. As such, this work focuses on the sonocatalytic degradation of various hazardous pollutants using MXene-based catalysts. First, the general principles of sonocatalysis are examined, followed by an analysis of the main components of the MXene-based sonocatalysts and their application for pollutant degradation. Lastly, ongoing challenges are highlighted with recommendations to address the issues.
The research and technological advancements observed in the latest years in the nanotechnology fi... more The research and technological advancements observed in the latest years in the nanotechnology field translated into significant application developments in various areas. This is particularly true for the renewable polymers area, where the nano-reinforcement of biobased materials leads to an increase in their technique and economic competitiveness. The efforts were predominantly focused on materials development and energy consumption minimization. However, attention must also be given to the widespread commercialization and the full characterization of any particular potential toxicological and environmental impact. Some of the most important nanomaterials used in recent years as fillers in the bioplastic industry are graphene-based materials (GBMs). GBMs have high surface area and biocompatibility and have interesting characterizations such as strangeness and flexibility. In this paper, the current state of the art for these GBMs in the bioplastics area, their challenges, and the strategies to overcome them are analyzed.
Environmental Technology and Innovation, Nov 1, 2021
Abstract As good quality water is becoming increasingly scarce, efficient methods for water recov... more Abstract As good quality water is becoming increasingly scarce, efficient methods for water recovery, recycling, and reuse must be developed to ensure a reliable water supply. This endeavor may take into account other water supplies such as sea and wastewater. Due to its unique structure and excellent physical and chemical properties, graphene and its derivatives are appealing for a variety of applications, including pollutant removal and water desalination. The graphene-based membranes (GBMs) displayed extremely high molecular separation and mass-transport properties, as well as antifouling properties that are not found in the existing state-of-art commercial membranes. As such, there is a huge potential for technology disruption. The present paper reviews the latest developments, discoveries, and prospective applications related to graphene-based membranes with an in-depth focus on heavy metal removal. The review offers a summary and outlook on the opportunities and challenges in this arising field. It was observed that GBM techniques are capable of producing large, leak-free, and fouling-free membranes that have a promising potential for the removal of hazardous pollutants from water.
Folic acid (vitamin B9) is an essential micronutrient for human health. It can be obtained using ... more Folic acid (vitamin B9) is an essential micronutrient for human health. It can be obtained using different biological pathways as a competitive option for chemical synthesis, but the price of its separation is the key obstacle preventing the implementation of biological methods on a broad scale. Published studies have confirmed that ionic liquids can be used to separate organic compounds. In this article, we investigated folic acid separation by analyzing 5 ionic liquids (CYPHOS IL103, CYPHOS IL104, [HMIM][PF6], [BMIM][PF6], [OMIM][PF6]) and 3 organic solvents (heptane, chloroform, and octanol) as the extraction medium. The best obtained results indicated that ionic liquids are potentially valuable for the recovery of vitamin B9 from diluted aqueous solutions as fermentation broths; the efficiency of the process reached 99.56% for 120 g/L CYPHOS IL103 dissolved in heptane and pH 4 of the aqueous folic acid solution. Artificial Neural Networks (ANNs) were combined with Grey Wolf Opti...
Iranian Journal of Chemistry & Chemical Engineering-international English Edition, Dec 1, 2020
Liquid-liquid equilibrium (LLE) data for aqueous two-phase systems (ATPSs) containing sodium di h... more Liquid-liquid equilibrium (LLE) data for aqueous two-phase systems (ATPSs) containing sodium di hydrogen phosphate and poly (ethylene glycols) (PEG) (1500, 2000, 3000, 4000 or 8000 g/mol) have been determined experimentally at different temperatures (298.15 and 308.15 K). The effects of molecular weights of PEG and temperature on the binodal curve were studied. It was found that an increase in PEG molecular weight and temperature led to the binodal curve displacement towards the origin and increasing two-phase region. In order to generate predictions and to optimize the system, Artificial Neural Networks and Support Vector Machines, simple, or in combination with Differential Evolution were employed. The simulation results indicated that the combination that best fits to the experimental data is Support Vector Machines optimized with Differential Evolution, with an average absolute error of 5.97%.
Organophosphate esters (OPEs) are used as additives in various industries. They do not chemically... more Organophosphate esters (OPEs) are used as additives in various industries. They do not chemically bond with the polymeric structure of materials, so they can stay for a long time and have a very adverse effect on the environment. To analyze the development of the prevalence and concentration of OPEs such as TCEP, TCPP, TDCP, TnBP, TPHP, TBOEP, TEHP, TMP, TCIPP, TDCIPP, TMPP, and TDBPP in water resources, a search between January 01, 2000, to April 08, 2021, was followed by a systematic review and meta-analysis. Among of the 888 articles scanned in the identity step, 58 articles containing 2676 samples, 10 countries, and 4 water types were included in the meta-analysis study. Among all studied OPEs, the concentration of TcrP, TCPP, TDCPP, and TnBP were at the top in water resources, with values >715 μg L-1 and lowest average concentrations were obtained for TDBPP and TpeP with values <0.0004 μg L-1. The most polluted area in terms of the concentration of OPEs in water resources was China. Besides, data analysis showed that there only was carcinogenic risk for China. A Monte-Carlo simulation indicated that although these obtained averages are in the same order of magnitude as the acceptable limit, for both adults and children, 95% of the population is at risk.
MXene-based nanomaterials (MBNs) are two-dimensional materials that exhibit a series of sought af... more MXene-based nanomaterials (MBNs) are two-dimensional materials that exhibit a series of sought after properties, including rich surface chemistry, adjustable bandgap structures, high electrical conductivity, hydrophobicity, thermal stability, and large specific surface area. MBNs have an exemplar performance when applied for the degradation of hazardous pollutants with various advanced oxidation processes such as heterogeneous sonocatalysis. As such, this work focuses on the sonocatalytic degradation of various hazardous pollutants using MXene-based catalysts. First, the general principles of sonocatalysis are examined, followed by an analysis of the main components of the MXene-based sonocatalysts and their application for pollutant degradation. Lastly, ongoing challenges are highlighted with recommendations to address the issues.
The research and technological advancements observed in the latest years in the nanotechnology fi... more The research and technological advancements observed in the latest years in the nanotechnology field translated into significant application developments in various areas. This is particularly true for the renewable polymers area, where the nano-reinforcement of biobased materials leads to an increase in their technique and economic competitiveness. The efforts were predominantly focused on materials development and energy consumption minimization. However, attention must also be given to the widespread commercialization and the full characterization of any particular potential toxicological and environmental impact. Some of the most important nanomaterials used in recent years as fillers in the bioplastic industry are graphene-based materials (GBMs). GBMs have high surface area and biocompatibility and have interesting characterizations such as strangeness and flexibility. In this paper, the current state of the art for these GBMs in the bioplastics area, their challenges, and the strategies to overcome them are analyzed.
Environmental Technology and Innovation, Nov 1, 2021
Abstract As good quality water is becoming increasingly scarce, efficient methods for water recov... more Abstract As good quality water is becoming increasingly scarce, efficient methods for water recovery, recycling, and reuse must be developed to ensure a reliable water supply. This endeavor may take into account other water supplies such as sea and wastewater. Due to its unique structure and excellent physical and chemical properties, graphene and its derivatives are appealing for a variety of applications, including pollutant removal and water desalination. The graphene-based membranes (GBMs) displayed extremely high molecular separation and mass-transport properties, as well as antifouling properties that are not found in the existing state-of-art commercial membranes. As such, there is a huge potential for technology disruption. The present paper reviews the latest developments, discoveries, and prospective applications related to graphene-based membranes with an in-depth focus on heavy metal removal. The review offers a summary and outlook on the opportunities and challenges in this arising field. It was observed that GBM techniques are capable of producing large, leak-free, and fouling-free membranes that have a promising potential for the removal of hazardous pollutants from water.
Folic acid (vitamin B9) is an essential micronutrient for human health. It can be obtained using ... more Folic acid (vitamin B9) is an essential micronutrient for human health. It can be obtained using different biological pathways as a competitive option for chemical synthesis, but the price of its separation is the key obstacle preventing the implementation of biological methods on a broad scale. Published studies have confirmed that ionic liquids can be used to separate organic compounds. In this article, we investigated folic acid separation by analyzing 5 ionic liquids (CYPHOS IL103, CYPHOS IL104, [HMIM][PF6], [BMIM][PF6], [OMIM][PF6]) and 3 organic solvents (heptane, chloroform, and octanol) as the extraction medium. The best obtained results indicated that ionic liquids are potentially valuable for the recovery of vitamin B9 from diluted aqueous solutions as fermentation broths; the efficiency of the process reached 99.56% for 120 g/L CYPHOS IL103 dissolved in heptane and pH 4 of the aqueous folic acid solution. Artificial Neural Networks (ANNs) were combined with Grey Wolf Opti...
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