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Lazhar Zourgui - One of the best experts on this subject based on the ideXlab platform.
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Phytochemical analysis and nephroprotective effect of cactus (Opuntia ficus-indica) cladodes on Sodium Dichromate-induced kidney injury in rats.
Applied physiology nutrition and metabolism = Physiologie appliquee nutrition et metabolisme, 2018Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Mohamed Nizar Zourgui, Lazhar ZourguiAbstract:Environmental and occupational exposure to chromium compounds, especially hexavalent chromium, is widely recognized as potentially nephrotoxic in humans and animals. The present study aimed to assess the efficacy of cactus (Opuntia ficus-indica) against Sodium Dichromate-induced nephrotoxicity, oxidative stress, and genotoxicity. Cactus cladodes extract (CCE) was phytochemically studied and tested in vitro for its potential antioxidant activities. Additionally, the preventive effect of CCE against Sodium Dichromate-induced renal dysfunction in a Wistar rat model (24 rats) was evaluated. For this purpose, CCE at a dose of 100 mg/kg was orally administered, followed by 10 mg/kg Sodium Dichromate (intraperitoneal injection). After 40 days of treatment, the rats were sacrificed, and the kidneys were excised for histological, lipid peroxidation, and antioxidant enzyme analyses. The phenol, flavonoid, tannin, ascorbic acid, and carotenoid contents of CCE were considered to be important. Our analyses showed that 1 mL of CCE was equivalent to 982.5 ± 1.79 μg of gallic acid, 294.37 ± 0.84 μg of rutin, 234.78 ± 0.24 μg of catechin, 204.34 ± 1.53 μg of ascorbic acid, and 3.14 ± 0.51 μg of β-carotene. In vivo, pretreatment with CCE was found to provide significant protection against Sodium Dichromate-induced nephrotoxicity by inhibiting lipid peroxidation, preserving normal antioxidant activities, and protecting renal tissues from lesions and DNA damage. The nephroprotective potential of CCE against Sodium Dichromate toxicity might be due to its antioxidant properties.
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hepatoprotective effect of taraxacum officinale leaf extract on Sodium Dichromate induced liver injury in rats
Environmental Toxicology, 2016Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Taraxacum officinale (L.) Weber, commonly known as Dandelion, has been widely used as a folkloric medicine for the treatment of liver and kidney disorders and some women diseases such as breast and uterus cancers. The main objective of the present study was to assess the efficiency of T. officinale leaf extract (TOE) in treating Sodium Dichromate hazards; it is a major environmental pollutant known for its wide toxic manifestations witch induced liver injury. TOE at a dose of 500 mg/kg b.w was orally administered once per day for 30 days consecutively, followed by 10 mg/kg b.w Sodium Dichromate was injected (intraperitoneal) for 10 days. Our results using Wistar rats showed that Sodium Dichromate significantly increased serum biochemical parameters. In the liver, it was found to induce an oxidative stress, evidenced from increase in lipid peroxidation and changes in antioxidative activities. In addition, histopathological observation revealed that Sodium Dichromate causes acute liver damage, necrosis of hepatocytes, as well as DNA fragmentation. Interestingly, animals that were pretreated with TOE, prior to Sodium Dichromate administration, showed a significant hepatoprotection, revealed by a significant reduction of Sodium Dichromate-induced oxidative damage for all tested markers. These finding powerfully supports that TOE was effective in the protection against Sodium Dichromate-induced hepatotoxicity and genotoxicity and, therefore, suggest a potential therapeutic use of this plant as an alternative medicine for patients with acute liver diseases.
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Hepatoprotective effect of Taraxacum officinale leaf extract on Sodium Dichromate‐induced liver injury in rats
Environmental toxicology, 2014Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Taraxacum officinale (L.) Weber, commonly known as Dandelion, has been widely used as a folkloric medicine for the treatment of liver and kidney disorders and some women diseases such as breast and uterus cancers. The main objective of the present study was to assess the efficiency of T. officinale leaf extract (TOE) in treating Sodium Dichromate hazards; it is a major environmental pollutant known for its wide toxic manifestations witch induced liver injury. TOE at a dose of 500 mg/kg b.w was orally administered once per day for 30 days consecutively, followed by 10 mg/kg b.w Sodium Dichromate was injected (intraperitoneal) for 10 days. Our results using Wistar rats showed that Sodium Dichromate significantly increased serum biochemical parameters. In the liver, it was found to induce an oxidative stress, evidenced from increase in lipid peroxidation and changes in antioxidative activities. In addition, histopathological observation revealed that Sodium Dichromate causes acute liver damage, necrosis of hepatocytes, as well as DNA fragmentation. Interestingly, animals that were pretreated with TOE, prior to Sodium Dichromate administration, showed a significant hepatoprotection, revealed by a significant reduction of Sodium Dichromate-induced oxidative damage for all tested markers. These finding powerfully supports that TOE was effective in the protection against Sodium Dichromate-induced hepatotoxicity and genotoxicity and, therefore, suggest a potential therapeutic use of this plant as an alternative medicine for patients with acute liver diseases.
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Protective Role of Cactus Cladodes Extract on Sodium Dichromate-Induced Testicular Injury and Oxidative Stress in Rats
Biological Trace Element Research, 2014Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Cactus ( Opuntia ficus-indica ) is a xerophyte plant that belongs to the Cactaceae family. The present study was designed to investigate the possible protective effects of cactus cladodes extract (CCE) on Sodium Dichromate-induced testis damage in adult male Wistar rats. For this purpose, CCE at a dose of 100 mg/kg was orally administrated, followed by 10 mg/kg Sodium Dichromate (intraperitoneal injection). After 40 days of treatment, the rats were sacrificed, and the testes were excised for histological, lipid peroxidation (LPO), and antioxidant enzyme analyses. Sodium Dichromate treatment significantly ( P
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Protective Role of Cactus Cladodes Extract on Sodium Dichromate-Induced Testicular Injury and Oxidative Stress in Rats
Biological Trace Element Research, 2014Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Cactus (Opuntia ficus-indica) is a xerophyte plant that belongs to the Cactaceae family. The present study was designed to investigate the possible protective effects of cactus cladodes extract (CCE) on Sodium Dichromate-induced testis damage in adult male Wistar rats. For this purpose, CCE at a dose of 100 mg/kg was orally administrated, followed by 10 mg/kg Sodium Dichromate (intraperitoneal injection). After 40 days of treatment, the rats were sacrificed, and the testes were excised for histological, lipid peroxidation (LPO), and antioxidant enzyme analyses. Sodium Dichromate treatment significantly (P < 0.01) decreased the body, testis, and accessory sex organ weights, sperm count and motility, and serum testosterone level. In addition, histological analysis revealed pronounced morphological alterations with tubular necrosis and reduction in the number of gametes in the lumen of the seminiferous tubules of Sodium Dichromate-intoxicated rats. Furthermore, exposure to Sodium Dichromate significantly (P < 0.01) increased LPO level and decreased superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) activities in testis. Interestingly, pretreatment with CCE significantly (P < 0.01) restored the serum testosterone level, sperm count, and motility to the levels of the control group. Moreover, CCE administration was capable of reducing the elevated level of LPO and significantly (P < 0.01) increased SOD, CAT, and GPx activities in testis. Cactus cladodes supplementation minimized oxidative damage and reversed the impairment of spermatogenesis and testosterone production induced by Sodium Dichromate in the rat testis.
Olubanke Olujoke Ogunlana - One of the best experts on this subject based on the ideXlab platform.
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InvestigatingSolanum AethiopicumLeaf-Extract and Sodium-Dichromate Effects on Steel-Rebar Corrosion Insaline/Marine Simulating-Environment: Implications on Sustainable Alternative for Environmentally-Hazardous Inhibitor
Engineering Solutions for Sustainability, 2015Co-Authors: Joshua Olusegun Okeniyi, Adebanji Samuel Ogbiye, Olubanke Olujoke Ogunlana, Elizabeth Toyin OkeniyiAbstract:This paper investigates Solanum aethiopicum leaf-extract and the well-known but environmentally-hazardous Sodium-Dichromate inhibitor effects on concrete steel-rebar corrosion in 3.5% NaCl medium (simulating saline/marine environment). Different equal-concentration models (wt% cement) of the natural-plant leaf-extract and of Sodium-Dichromate were admixed in steel-reinforced concrete slabs from which electrochemical test-measurements were obtained for comparing admixture performance. Test-results, analyzed as per ASTM G16-95 R04, showed that only the 0.083% Sodium-Dichromate admixture outperformed the 0.083% Solanum aethiopicum leaf-extract in corrosion-inhibition effectiveness. The other natural-plant leaf-extract exhibited better inhibition-efficiency performance than their equal-concentration models of Sodium-Dichromate. The 0.25% Solanum aethiopicum leaf-extract exhibited optimal performance, η = 98.28%, at inhibiting steel-rebar corrosion among the also effective different concentrations of the plant-extract and of Sodium-Dichromate admixtures employed. These and phytochemical test-results bare indications that Solanum aethiopicum leaf-extract is a suitable, sustainable and eco-friendly alternative for the environmentally-hazardous Sodium-Dichromate inhibitor of steel-rebar corrosion in concrete designed for saline/marine environments. © Copyright 2015 by The Minerals, Metals & Materials Society. All rights reserved
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investigating solanum aethiopicum leaf extract and Sodium Dichromate effects on steel rebar corrosion in saline marine simulating environment implications on sustainable alternative for environmentally hazardous inhibitor
2015Co-Authors: Joshua Olusegun Okeniyi, Adebanji Samuel Ogbiye, Olubanke Olujoke Ogunlana, Elizabeth Toyin OkeniyiAbstract:This paper investigates Solanum aethiopicum leaf-extract and the well-known but environmentally-hazardous Sodium-Dichromate inhibitor effects on concrete steel-rebar corrosion in 3.5% NaCl medium (simulating saline/marine environment). Different equal-concentration models (wt% cement) of the natural-plant leaf-extract and of Sodium-Dichromate were admixed in steel-reinforced concrete slabs from which electrochemical test-measurements were obtained for comparing admixture performance. Test-results, analyzed as per ASTM G16-95 R04, showed that only the 0.083% Sodium-Dichromate admixture outperformed the 0.083% Solanum aethiopicum leaf-extract in corrosion-inhibition effectiveness. The other natural-plant leaf-extract exhibited better inhibition-efficiency performance than their equal-concentration models of Sodium-Dichromate. The 0.25% Solanum aethiopicum leaf-extract exhibited optimal performance, η = 98.28%, at inhibiting steel-rebar corrosion among the also effective different concentrations of the plant-extract and of Sodium-Dichromate admixtures employed. These and phytochemical test-results bare indications that Solanum aethiopicum leaf-extract is a suitable, sustainable and eco-friendly alternative for the environmentally-hazardous Sodium-Dichromate inhibitor of steel-rebar corrosion in concrete designed for saline/marine environments.
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Engineering Solutions for Sustainability: Materials and Resources II - Investigating Solanum Aethiopicum Leaf-Extract and Sodium-Dichromate Effects on Steel-Rebar Corrosion in Saline/Marine Simulating-Environment: Implications on Sustainable Alternat
Engineering Solutions for Sustainability, 2015Co-Authors: Joshua Olusegun Okeniyi, Adebanji Samuel Ogbiye, Olubanke Olujoke Ogunlana, Elizabeth Toyin OkeniyiAbstract:This paper investigates Solanum aethiopicum leaf-extract and the well-known but environmentally-hazardous Sodium-Dichromate inhibitor effects on concrete steel-rebar corrosion in 3.5% NaCl medium (simulating saline/marine environment). Different equal-concentration models (wt% cement) of the natural-plant leaf-extract and of Sodium-Dichromate were admixed in steel-reinforced concrete slabs from which electrochemical test-measurements were obtained for comparing admixture performance. Test-results, analyzed as per ASTM G16-95 R04, showed that only the 0.083% Sodium-Dichromate admixture outperformed the 0.083% Solanum aethiopicum leaf-extract in corrosion-inhibition effectiveness. The other natural-plant leaf-extract exhibited better inhibition-efficiency performance than their equal-concentration models of Sodium-Dichromate. The 0.25% Solanum aethiopicum leaf-extract exhibited optimal performance, η = 98.28%, at inhibiting steel-rebar corrosion among the also effective different concentrations of the plant-extract and of Sodium-Dichromate admixtures employed. These and phytochemical test-results bare indications that Solanum aethiopicum leaf-extract is a suitable, sustainable and eco-friendly alternative for the environmentally-hazardous Sodium-Dichromate inhibitor of steel-rebar corrosion in concrete designed for saline/marine environments.
Mbarka Hfaiedh - One of the best experts on this subject based on the ideXlab platform.
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Phytochemical analysis and nephroprotective effect of cactus (Opuntia ficus-indica) cladodes on Sodium Dichromate-induced kidney injury in rats.
Applied physiology nutrition and metabolism = Physiologie appliquee nutrition et metabolisme, 2018Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Mohamed Nizar Zourgui, Lazhar ZourguiAbstract:Environmental and occupational exposure to chromium compounds, especially hexavalent chromium, is widely recognized as potentially nephrotoxic in humans and animals. The present study aimed to assess the efficacy of cactus (Opuntia ficus-indica) against Sodium Dichromate-induced nephrotoxicity, oxidative stress, and genotoxicity. Cactus cladodes extract (CCE) was phytochemically studied and tested in vitro for its potential antioxidant activities. Additionally, the preventive effect of CCE against Sodium Dichromate-induced renal dysfunction in a Wistar rat model (24 rats) was evaluated. For this purpose, CCE at a dose of 100 mg/kg was orally administered, followed by 10 mg/kg Sodium Dichromate (intraperitoneal injection). After 40 days of treatment, the rats were sacrificed, and the kidneys were excised for histological, lipid peroxidation, and antioxidant enzyme analyses. The phenol, flavonoid, tannin, ascorbic acid, and carotenoid contents of CCE were considered to be important. Our analyses showed that 1 mL of CCE was equivalent to 982.5 ± 1.79 μg of gallic acid, 294.37 ± 0.84 μg of rutin, 234.78 ± 0.24 μg of catechin, 204.34 ± 1.53 μg of ascorbic acid, and 3.14 ± 0.51 μg of β-carotene. In vivo, pretreatment with CCE was found to provide significant protection against Sodium Dichromate-induced nephrotoxicity by inhibiting lipid peroxidation, preserving normal antioxidant activities, and protecting renal tissues from lesions and DNA damage. The nephroprotective potential of CCE against Sodium Dichromate toxicity might be due to its antioxidant properties.
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hepatoprotective effect of taraxacum officinale leaf extract on Sodium Dichromate induced liver injury in rats
Environmental Toxicology, 2016Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Taraxacum officinale (L.) Weber, commonly known as Dandelion, has been widely used as a folkloric medicine for the treatment of liver and kidney disorders and some women diseases such as breast and uterus cancers. The main objective of the present study was to assess the efficiency of T. officinale leaf extract (TOE) in treating Sodium Dichromate hazards; it is a major environmental pollutant known for its wide toxic manifestations witch induced liver injury. TOE at a dose of 500 mg/kg b.w was orally administered once per day for 30 days consecutively, followed by 10 mg/kg b.w Sodium Dichromate was injected (intraperitoneal) for 10 days. Our results using Wistar rats showed that Sodium Dichromate significantly increased serum biochemical parameters. In the liver, it was found to induce an oxidative stress, evidenced from increase in lipid peroxidation and changes in antioxidative activities. In addition, histopathological observation revealed that Sodium Dichromate causes acute liver damage, necrosis of hepatocytes, as well as DNA fragmentation. Interestingly, animals that were pretreated with TOE, prior to Sodium Dichromate administration, showed a significant hepatoprotection, revealed by a significant reduction of Sodium Dichromate-induced oxidative damage for all tested markers. These finding powerfully supports that TOE was effective in the protection against Sodium Dichromate-induced hepatotoxicity and genotoxicity and, therefore, suggest a potential therapeutic use of this plant as an alternative medicine for patients with acute liver diseases.
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Hepatoprotective effect of Taraxacum officinale leaf extract on Sodium Dichromate‐induced liver injury in rats
Environmental toxicology, 2014Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Taraxacum officinale (L.) Weber, commonly known as Dandelion, has been widely used as a folkloric medicine for the treatment of liver and kidney disorders and some women diseases such as breast and uterus cancers. The main objective of the present study was to assess the efficiency of T. officinale leaf extract (TOE) in treating Sodium Dichromate hazards; it is a major environmental pollutant known for its wide toxic manifestations witch induced liver injury. TOE at a dose of 500 mg/kg b.w was orally administered once per day for 30 days consecutively, followed by 10 mg/kg b.w Sodium Dichromate was injected (intraperitoneal) for 10 days. Our results using Wistar rats showed that Sodium Dichromate significantly increased serum biochemical parameters. In the liver, it was found to induce an oxidative stress, evidenced from increase in lipid peroxidation and changes in antioxidative activities. In addition, histopathological observation revealed that Sodium Dichromate causes acute liver damage, necrosis of hepatocytes, as well as DNA fragmentation. Interestingly, animals that were pretreated with TOE, prior to Sodium Dichromate administration, showed a significant hepatoprotection, revealed by a significant reduction of Sodium Dichromate-induced oxidative damage for all tested markers. These finding powerfully supports that TOE was effective in the protection against Sodium Dichromate-induced hepatotoxicity and genotoxicity and, therefore, suggest a potential therapeutic use of this plant as an alternative medicine for patients with acute liver diseases.
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Protective Role of Cactus Cladodes Extract on Sodium Dichromate-Induced Testicular Injury and Oxidative Stress in Rats
Biological Trace Element Research, 2014Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Cactus ( Opuntia ficus-indica ) is a xerophyte plant that belongs to the Cactaceae family. The present study was designed to investigate the possible protective effects of cactus cladodes extract (CCE) on Sodium Dichromate-induced testis damage in adult male Wistar rats. For this purpose, CCE at a dose of 100 mg/kg was orally administrated, followed by 10 mg/kg Sodium Dichromate (intraperitoneal injection). After 40 days of treatment, the rats were sacrificed, and the testes were excised for histological, lipid peroxidation (LPO), and antioxidant enzyme analyses. Sodium Dichromate treatment significantly ( P
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Protective Role of Cactus Cladodes Extract on Sodium Dichromate-Induced Testicular Injury and Oxidative Stress in Rats
Biological Trace Element Research, 2014Co-Authors: Mbarka Hfaiedh, Dalel Brahmi, Lazhar ZourguiAbstract:Cactus (Opuntia ficus-indica) is a xerophyte plant that belongs to the Cactaceae family. The present study was designed to investigate the possible protective effects of cactus cladodes extract (CCE) on Sodium Dichromate-induced testis damage in adult male Wistar rats. For this purpose, CCE at a dose of 100 mg/kg was orally administrated, followed by 10 mg/kg Sodium Dichromate (intraperitoneal injection). After 40 days of treatment, the rats were sacrificed, and the testes were excised for histological, lipid peroxidation (LPO), and antioxidant enzyme analyses. Sodium Dichromate treatment significantly (P < 0.01) decreased the body, testis, and accessory sex organ weights, sperm count and motility, and serum testosterone level. In addition, histological analysis revealed pronounced morphological alterations with tubular necrosis and reduction in the number of gametes in the lumen of the seminiferous tubules of Sodium Dichromate-intoxicated rats. Furthermore, exposure to Sodium Dichromate significantly (P < 0.01) increased LPO level and decreased superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) activities in testis. Interestingly, pretreatment with CCE significantly (P < 0.01) restored the serum testosterone level, sperm count, and motility to the levels of the control group. Moreover, CCE administration was capable of reducing the elevated level of LPO and significantly (P < 0.01) increased SOD, CAT, and GPx activities in testis. Cactus cladodes supplementation minimized oxidative damage and reversed the impairment of spermatogenesis and testosterone production induced by Sodium Dichromate in the rat testis.
Yaping Dong - One of the best experts on this subject based on the ideXlab platform.
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solubility and metastable zone width of aqueous Sodium Dichromate dihydrate solutions in the presence of Sodium chromate additive
Journal of Crystal Growth, 2016Co-Authors: Liping Wang, Jiaoyu Peng, Haitao Feng, Yaping Dong, Wu LiAbstract:Solubility and metastable zone width (MSZW) of aqueous Sodium Dichromate solutions in different concentration of Sodium chromate were studied experimentally by the polythermal method using a turbidity monitoring technique. The effects of cooling rate R, saturation temperature T0 of Sodium Dichromate and concentration ci of Sodium chromate on the MSZW were studied. The results show that the MSZW widens with increasing cooling rate R but it narrows with increasing saturation temperature T0 of Sodium Dichromate and concentration ci of Sodium chromate. The experimental data were analyzed by using an equation, based on the classical three-dimensional nucleation theory, relating MSZW with cooling rate R.
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Solubility, Metastable Zone Width, and Nucleation Kinetics of Sodium Dichromate Dihydrate
Journal of Chemical & Engineering Data, 2014Co-Authors: Liping Wang, Jiaoyu Peng, Feng Haitao, Naijin Dong, Yaping DongAbstract:The experiment data on the solubility and metastable zone width (MSZW) of Sodium Dichromate dihydrate have been determined in the temperature range from (290.45 to 319.76) K using the conventional polythermal method by turbidity monitoring technique. Based on the solubility data, the dissolution enthalpy and entropy of Sodium Dichromate dihydrate were calculated by the van’t Hoff equation. Two approaches were used to estimate the nucleation kinetics of Sodium Dichromate dihydrate from the MSZW data, the self-consistent Nývlt-like equation and the novel equation of three-dimensional nucleation theory. The notable factors affecting MSZW of Sodium Dichromate dihydrate such as cooling rate, initial composition, stirring rate, and presence of seed particles have been evaluated in this paper. It was observed that the MSZW of Sodium Dichromate dihydrate has an obvious decrease with the increase of initial composition, rotation frequency of stirring, and the mass of seed particles, respectively. Nevertheless, the...
Cheng-wei Li - One of the best experts on this subject based on the ideXlab platform.
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Volumetric and viscosity behaviors of the chromic anhydride + Sodium Dichromate + Sodium chromate + water from (298.15 to 333.15) K
Journal of Molecular Liquids, 2008Co-Authors: Peng Zhang, Ji-yan Wang, Fu-an Wang, Cheng-wei LiAbstract:Abstract The densities and viscosities of chromic anhydride + Sodium Dichromate + Sodium chromate + water quaternary mixtures and Sodium Dichromate + Sodium chromate + water ternary mixtures have been measured at the temperatures(298.15, 303.15, 313.15, 323.15 and 333.15)K. The experimental data were correlated with the Vogel–Tamman–Fulcher equation. The apparent molar volumes, limiting partial molar volumes and viscosity B-coefficient of chromic anhydride were calculated from the experimental measurements. The solute–solute interactions, solute-mixed solvent interactions and the structural-making effect of chromic anhydride have been discussed using Hepler criterion and Jones–Dole equation.
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volumetric and viscosity behaviors of the chromic anhydride Sodium Dichromate Sodium chromate water from 298 15 to 333 15 k
Journal of Molecular Liquids, 2008Co-Authors: Peng Zhang, Ji-yan Wang, Fu-an Wang, Cheng-wei LiAbstract:Abstract The densities and viscosities of chromic anhydride + Sodium Dichromate + Sodium chromate + water quaternary mixtures and Sodium Dichromate + Sodium chromate + water ternary mixtures have been measured at the temperatures(298.15, 303.15, 313.15, 323.15 and 333.15)K. The experimental data were correlated with the Vogel–Tamman–Fulcher equation. The apparent molar volumes, limiting partial molar volumes and viscosity B-coefficient of chromic anhydride were calculated from the experimental measurements. The solute–solute interactions, solute-mixed solvent interactions and the structural-making effect of chromic anhydride have been discussed using Hepler criterion and Jones–Dole equation.
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Macrokinetic Study of the Electrochemical Synthesis Process of Sodium Dichromate
Chemical Engineering & Technology, 2007Co-Authors: Cheng-wei Li, Gensheng Chen, Fu-an Wang, Tao Qi, Yi Zhang, Peng ZhangAbstract:In order to address the problems existing in the traditional production techniques for Sodium Dichromate, a new green technology for producing Sodium Dichromate using an electrochemical synthesis method was studied. Using a self-made electrosynthesis reactor composed of pure titanium and stainless steel, with a multiple-unit metal oxide combination anode, a stainless steel cathode, and a reinforcing combination cation exchange membrane, the kinetic experiments were carried out on the direct electrochemical synthesis reaction of Sodium Dichromate from Sodium chromate. The kinetic data were experimentally measured at different temperatures and different initial Sodium chromate concentrations of anolyte. The results show that the electrochemical synthesis process presents complicated zero-order reaction kinetic characteristics, with the reaction rate constant depending on the initial Sodium chromate concentration. The macrokinetic equation of the electrochemical synthesis reaction was established, and some kinetic parameters were calculated. The apparent activation energy is less than that of the ordinary chemical reaction, and this shows that the electrochemical synthesis of Sodium Dichromate has great development potential.