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Jiaqian Jiang - One of the best experts on this subject based on the ideXlab platform.
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reaction kinetics and oxidation products formation in the degradation of ciprofloxacin and ibuprofen by Ferrate vi
Chemosphere, 2015Co-Authors: Zhengwei Zhou, Jiaqian JiangAbstract:The treatment of ciprofloxacin (CIP) and ibuprofen (IBU) in test solutions by Ferrate(VI) was investigated in this study. A series of jar test was performed in bench-scale at pH 6-9 and Ferrate(VI) dose of 1-5 mg L(-1). Results demonstrated that Ferrate(VI) removed CIP from test solutions efficiently, with above 70% of reduction under study conditions. In contrary, the removal rates of IBU were very low, less than 25% in all conditions. Raising Ferrate(VI) dose improved the treatment performance, while the influence of solution pH was not significant at pH 6-9 compared with that of Ferrate(VI) dose. In addition, kinetic studies of Ferrate(VI) with both compounds were carried out at pH 8 and pH 9 (20 °C). Ferrate(VI) had a much higher reactivity with CIP than IBU at pH 8 and pH 9, with CIP's apparent second-order rate constants of 113.7±6.3 M(-1) s(-1) and 64.1±1.0 M(-1) s(-1), respectively. The rate constants of Ferrate(VI) with IBU were less than 0.2 M(-1) s(-1) at pH 8 and pH 9. Furthermore, seven oxidation products (OPs) were formed during CIP degradation by Ferrate(VI). The attack on the piperazinyl ring of the CIP by Ferrate(VI) appeared to lead to the cleavage or hydroxylation of the rings, and the attack on the quinolone moiety by Ferrate(VI) might lead to the cleavage of the double bond at the six-member heterocyclic ring. No OPs of IBU were detected during Ferrate(VI) oxidation due to very small part of IBU was degraded by Ferrate(VI).
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Advances in the development and application of Ferrate(VI) for water and wastewater treatment
Journal of Chemical Technology & Biotechnology, 2013Co-Authors: Jiaqian JiangAbstract:Ferrate(VI) ion has the formula FeO42−, and possesses unique properties, vs. strong oxidising potential and simultaneous generation of ferric coagulating species. For this reason, a number of studies have been carried out to investigate the preparation, characterisation and application of Ferrate(VI) for water and wastewater treatment. These studies revealed that Ferrate(VI) can disinfect microorganisms, partially degrade and/or oxidise organic and inorganic impurities, and remove suspended/colloidal particulate materials in a single dosing and mixing unit process. Most recently, research groups globally have reported using Ferrate(VI) to treat emerging micropollutants in water purification processes. Work has not only been limited to fundamental studies but has been driven by the ideas of putting the application of Ferrate(VI) into practice; the advantages of the application of Ferrate(VI) over existing water and wastewater treatment methods should be shown as should other benefits to the water industry of its use. This paper thus reviews advances in the preparation and use of Ferrate(VI), discusses the potential full scale application of Ferrate(VI) in water purification and recommends required future research in order to implement Ferrate(VI) in practice. © 2013 Society of Chemical Industry
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preliminary study of ciprofloxacin cip removal by potassium Ferrate vi
Separation and Purification Technology, 2012Co-Authors: Jiaqian Jiang, Zhengwei Zhou, Ole PahlAbstract:Abstract Ciprofloxacin was identified among the top 10 of high priority pharmaceuticals detected in aquatic environment. Potassium Ferrate(VI) is a strong oxidant which possesses very high redox potential and has been widely studied in water disinfection and removing organic and inorganic pollutants. There has been one published work to detail the removal of phosphorus as well as micro-pollutants including ciprofloxacin by Ferrate in wastewater treatment. However, developing a simple ciprofloxacin detection method and study of feasibility of its treatment by Ferrate was the objective of this work. Solid phase extraction (SPE) and UV/vis spectrophotometer at 280 nm was employed to analyse CIP. A series of jar test experiments was carried out to evaluate the Ferrate performance for CIP reduction. Results demonstrated that a SPE coupled with simple UV/vis spectrophotometric method can detect CIP with detection limit of 10 μg/L for model wastewater samples. Ferrate can remove at least 60% of CIP from model wastewater even at very low Ferrate doses ( 8).
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electrochemical production of Ferrate iron vi application to the wastewater treatment on a laboratory scale and comparison with iron iii coagulant
Water Air and Soil Pollution, 2010Co-Authors: Cecile Stanford, Jiaqian Jiang, Mohammad AlsheyabAbstract:This paper presents a comparative study of the performance of Ferrate(VI), FeO 4 2− , and ferric, Fe(III), towards wastewater treatment. The Ferrate(VI) was produced by electrochemical synthesis, using steel electrodes in a 16 M NaOH solution. Domestic wastewater collected from Hailsham North Wastewater Treatment Works was treated with Ferrate(VI) and ferric sulphate (Fe(III)). Samples were analysed for suspended solids, chemical oxygen demand (COD), biochemical oxygen demand (BOD) and P removal. Results for low doses of Fe(VI) were validated via a reproducibility study. Removal of phosphorous reached 40% with a Fe(VI) dose as low as 0.01 mg/L compared to 25% removal with 10 mg/L of Fe(III). For lower doses (<1 mg/L as Fe), Fe(VI) can achieve between 60% and 80% removals of SS and COD, but Fe(III) performed even not as well as the control sample where no iron chemical was dosed. The Ferrate solution was found to be stable for a maximum of 50 min, beyond which Fe(VI) is reduced to less oxidant species. This provided the maximum allowed storage time of the electrochemically produced Ferrate(VI) solution. Results demonstrated that low addition of Ferrate(VI) leads to good removal of P, BOD, COD and suspended solids from wastewater compared to ferric addition and further studies could bring an optimisation of the dosage and treatment.
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the online generation and application of Ferrate vi for sewage treatment a pilot scale trial
Separation and Purification Technology, 2009Co-Authors: Jiaqian Jiang, Cecile Stanford, Mohammad AlsheyabAbstract:Abstract Ferrate(VI) is an oxidant; under acidic conditions, the redox potential of Ferrate(VI) salt is the strongest among all oxidants used for water and wastewater treatment. Ferrate(VI) is also a coagulant; during the oxidation process, Ferrate(VI) ions are reduced to Fe(III) ions or ferric hydroxide, which simultaneously generates a coagulant in a single dosing and mixing unit process. The superior performance of Ferrate(VI) as an oxidant/disinfectant and coagulant in water and wastewater treatment has been extensively studied. However, challenges have existed to the implementation of Ferrate(VI) technology in water and wastewater treatment practice due to the instability of the Ferrate(VI) solutions and a high preparation cost of a solid Ferrate(VI). It would be an ideal approach to generate Ferrate(VI) in situ and apply the generated Ferrate(VI) directly for wastewater treatment. This paper reports the online preparation and use of Ferrate(VI) for sewage treatment at a pilot scale applied in a wastewater treatment plant in the UK. The technology has been demonstrated to be promising in terms of removing suspended solids, phosphate, COD and BOD at a very low dose range, 0.005–0.04 mg l −1 as Fe 6+ in comparison with a normal coagulant, ferric sulphate at high doses, ranging between 25 and 50 mg l −1 as Fe 3+ . In terms of the similar sewage treatment performance achieved, the required dose with Ferrate(VI) was 100 times less than that with ferric sulphate. However, the full operating cost needs further assessment before the Ferrate(VI) technology could be implemented in a full scale water or wastewater treatment.
Virender K. Sharma - One of the best experts on this subject based on the ideXlab platform.
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chlorine decay and trihalomethane formation following Ferrate vi preoxidation and chlorination of drinking water
Chemosphere, 2017Co-Authors: Feng Luo, Leslie Cizmas, Feilong Dong, Jingguo Zhao, Tuqiao Zhang, Virender K. SharmaAbstract:This paper presents the effect of preoxidation with Ferrate(VI) (FeVIO42-, Fe(VI)) prior to chlorination on chlorine decay and formation of disinfection by-products in filtered raw water from a full-scale drinking water treatment plant. The rate of chlorine decay became significantly faster as the concentration of Ferrate(VI) increased. Chlorine degradation followed two first-order decay reactions with rate constants k1 and k2 for fast and slow decay, respectively. Kinetic modeling established the relationships between k1 and k2 and varying dosages of chlorine and Ferrate(VI). When Ferrate(VI) was used as a pre-oxidant, the levels of trihalomethanes (trichloromethane (TCM), dichlorobromomethane (DCBM), dibromochloromethane (DBCM), and tribromomethane (TBM)) in water samples decreased as the Ferrate(VI) concentration increased. The concentrations of these trihalomethanes followed the order TCM > DCBM ≈ DBCM > TBM.
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thermal decomposition of barium Ferrate vi mechanism and formation of feiv intermediate and nanocrystalline fe2o3 and ferrite
Journal of Alloys and Compounds, 2016Co-Authors: Libor Machala, Virender K. Sharma, E Kuzmann, Z Homonnay, Jan Filip, Radina P KralchevskaAbstract:Simple high-valent iron-oxo species, Ferrate(VI) (FeVIO42−, Fe(VI)) has applications in energy storage, organic synthesis, and water purification. Of the various salts of Fe(VI), barium Ferrate(VI) (BaFeO4) has also a great potential as a battery material. This paper presents the thermal decomposition of BaFeO4 in static air and nitrogen atmosphere, monitored by combination of thermal analysis, Mossbauer spectroscopy, X-ray powder diffraction, and electron-microscopic techniques. The formation of FeIV species in the form of BaFeO3 was found to be the primary decomposition product of BaFeO4 at temperature around 190 °C under both studied atmospheres. BaFeO3 was unstable in air reacting with CO2 to form barium carbonate and speromagnetic amorphous iron(III) oxide nanoparticles (<5 nm). Above 600 °C, a solid state reaction between BaCO3 and Fe2O3 occurred, leading to the formation of barium ferrite nanoparticles, BaFe2O4 (20–100 nm).
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thermal decomposition of barium Ferrate vi mechanism and formation of feiv intermediate and nanocrystalline fe2o3 and ferrite
ChemInform, 2016Co-Authors: Libor Machala, Virender K. Sharma, E Kuzmann, Z Homonnay, Jan Filip, Radina P KralchevskaAbstract:Thermal decomposition of BaFeO4 in static air and nitrogen atmosphere is monitored by thermal analysis, Moessbauer spectroscopy, powder XRD, and electron-microscopic methods.
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review on high valent fevi Ferrate a sustainable green oxidant in organic chemistry and transformation of pharmaceuticals
ACS Sustainable Chemistry & Engineering, 2016Co-Authors: Virender K. Sharma, Long Chen, Radek ZborilAbstract:Iron is the most common metal by mass on earth and represents the basic element of industrial society. The usage of iron to synthesize consumer products and to remediate environment is an attractive approach. This perspective presents applications of the high-valent iron oxo compound FeVIO42– (Ferrate) in sustainable organic synthesis and treatment technology. In synthesizing organic molecules, C–H bond activation and selectivity are two basic ingredients of efficiency, which are attainable by Ferrate. Examples of hydroxylation of hydrocarbons and conversion of alcohols to aldehyde/ketone are presented. In addition, many other organic molecules of amines, aniline, phenolic, and thiol functionalities can be oxidized by Ferrate. This oxidation chemistry of Ferrate is expedient in transforming pharmaceuticals, micropollutants in bodies of water with implications for human and ecological health. A wide range of micropollutants, which are commonly found in drinking water resources and wastewater effluents, can...
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direct evidence of fe v and fe iv intermediates during reduction of fe vi to fe iii a nuclear forward scattering of synchrotron radiation approach
Physical Chemistry Chemical Physics, 2015Co-Authors: Libor Machala, Virender K. Sharma, Vit Prochazka, M Miglierini, Zdeněk Marusak, H C Wille, Radek ZbořilAbstract:Identification of unstable high-valent iron species in electron transfer reactions of Ferrate(VI) (FeVIO42−, Fe(VI)) has been an important challenge in advancing the understanding of the oxidative mechanisms of Ferrates. This paper presents the first example of distinguishing various phases differing in the valence state of iron in the solid state reduction of Fe(VI) to Fe(III) oxides at 235 °C using hyperfine parameters, isomer shift and hyperfine magnetic field, obtained from nuclear forward scattering of synchrotron radiation (NFS). The NFS technique enables a fast data accumulation resulting in high time resolution of in situ experiments. The results suggest a reaction mechanism, involving Fe(V) and Fe(IV) species, in the thermal decomposition of K2FeO4 to KFeO2. The present study opens up an approach to exploring the unambiguous identification of Fe(VI), Fe(V), Fe(IV), and Fe(III) in electron-transfer reaction mechanisms of Ferrates in solid and aqueous phase systems.
Quino Favero, Javier Martín - One of the best experts on this subject based on the ideXlab platform.
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Diseño de una unidad de tratamiento de agua basada en electrosíntesis de iones ferrato para la remoción de arsénico inorgánico
'Universidad Nacional Agraria la Molina', 2020Co-Authors: Quino Favero, Javier MartínAbstract:otrosEl estudio tuvo como objetivo diseñar y construir un sistema de tratamiento continuo para tratar agua contaminada con arsenito y arseniato utilizando el ion ferrato (VI) como agente oxidante. La producción del ion ferrato (VI) se realizó a través del método electroquímico por oxidación anódica del hierro con bajo contenido de carbono (0,047 %) en un reactor de celda dividida con cátodo de grafito, una membrana de intercambio catiónico y NaOH como electrolito. La máxima concentración de ferrato (VI) de 0,287 mol/L se logró cuando la relación entre la superficie del ánodo y el volumen de la cámara anódica (SÁnodo/VÁnodo) fue 2,21 cm-1 , la concentración molar de electrolito (NaOH) 20 molL -1 y la densidad de corriente de 80 A/m2 luego de 5 horas de tiempo de electrólisis. Se encontró que un costo de producción de ferrato (VI) más bajo, no se relacionó con la mayor eficiencia farádica en la producción del ferrato (VI), siendo el NaOH el componente que contribuye con el 80% de los costos de producción. La solución de ferrato (VI) producida electroquímicamente fue utilizada conjuntamente con cloruro férrico para remover arsenito, arseniato y mezclas de ambos iones en concentraciones de hasta 1000 µg/L en agua subterránea sintética de Bangladesh (SBGW), lográndose remover el arsénico y alcanzando una concentración residual menor de 10 µg/L, que es el límite establecido por la OMS para agua potable. El diseño y construcción del sistema de tratamiento continuo de la SBGW utilizando ferrato consistió en un sistema de adición de ferrato (VI) para mantener un ORP de 800 mV para asegurar la conversión del arsenito a arseniato seguido de una adición de cloruro férrico para ajustar el pH de salida a 6,45 y capturar el arseniato remanente en una unidad de filtración de poro 5 µm, lográndose concentraciones finales de arsénico inferiores a los 10 µg/L operando a un caudal de 120 L/h.The study aimed to design and build a continuous system to treat water polluted with arsenite and arsenate using the Ferrate (VI) ion as an oxidizing agent. Ferrate (VI) ion production was carried out through the electrochemical method by anodic oxidation of low carbon steel (0.047%) in a divided cell reactor with a graphite cathode, a cation exchange membrane and NaOH as electrolyte. A maximum Ferrate (VI) concentration of 0,287 mol L -1 was achieved when the ratio between the anode surface and the volume of the anode chamber (SÁnode / VÁnode) was 2,21 cm-1 , the molar concentration of electrolyte (NaOH) was 20 mol/L and the current density of 80 A/m2 after 5 hours of electrolysis time. It was found that a lower production cost of Ferrate (VI) was not related with higher faradic efficiencies in the production of Ferrate (VI), with NaOH being the component that contributes to 80% of the production costs. The electrochemically produced Ferrate (VI) solution was used together with ferric chloride to remove arsenite, arsenate and mixtures of both ions in concentrations of up to 1000 µg/L in synthetic Bangladesh groundwater (SBGW), achieving high arsenic removals and reaching an arsenic residual concentration less than 10 µg / L, which is the limit established by the WHO for drinking water. The design and construction of the continuous treatment system of the SBGW using Ferrate consisted of an addition system of Ferrate (VI) to maintain an ORP of 800 mV to ensure the oxidation of the arsenite to arsenate followed by an addition of ferric chloride to adjust the final pH at 6,45 and capturing the remaining arsenate before a filter unit (5 µm pore), achieving final concentrations of arsenic below 10 µg / L operating at a flow rate of 120 L/h.Tesi
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Diseño de una unidad de tratamiento de agua basada en electrosíntesis de iones ferrato para la remoción de arsénico inorgánico
'Baishideng Publishing Group Inc.', 2020Co-Authors: Quino Favero, Javier MartínAbstract:Universidad Nacional Agraria La Molina. Escuela de Posgrado. Doctorado en Ingeniería AmbientalEl estudio tuvo como objetivo diseñar y construir un sistema de tratamiento continuo para tratar agua contaminada con arsenito y arseniato utilizando el ion ferrato (VI) como agente oxidante. La producción del ion ferrato (VI) se realizó a través del método electroquímico por oxidación anódica del hierro con bajo contenido de carbono (0,047 %) en un reactor de celda dividida con cátodo de grafito, una membrana de intercambio catiónico y NaOH como electrolito. La máxima concentración de ferrato (VI) de 0,287 mol/L se logró cuando la relación entre la superficie del ánodo y el volumen de la cámara anódica (SÁnodo/VÁnodo) fue 2,21 cm-1 , la concentración molar de electrolito (NaOH) 20 molL -1 y la densidad de corriente de 80 A/m2 luego de 5 horas de tiempo de electrólisis. Se encontró que un costo de producción de ferrato (VI) más bajo, no se relacionó con la mayor eficiencia farádica en la producción del ferrato (VI), siendo el NaOH el componente que contribuye con el 80% de los costos de producción. La solución de ferrato (VI) producida electroquímicamente fue utilizada conjuntamente con cloruro férrico para remover arsenito, arseniato y mezclas de ambos iones en concentraciones de hasta 1000 µg/L en agua subterránea sintética de Bangladesh (SBGW), lográndose remover el arsénico y alcanzando una concentración residual menor de 10 µg/L, que es el límite establecido por la OMS para agua potable. El diseño y construcción del sistema de tratamiento continuo de la SBGW utilizando ferrato consistió en un sistema de adición de ferrato (VI) para mantener un ORP de 800 mV para asegurar la conversión del arsenito a arseniato seguido de una adición de cloruro férrico para ajustar el pH de salida a 6,45 y capturar el arseniato remanente en una unidad de filtración de poro 5 µm, lográndose concentraciones finales de arsénico inferiores a los 10 µg/L operando a un caudal de 120 L/h.The study aimed to design and build a continuous system to treat water polluted with arsenite and arsenate using the Ferrate (VI) ion as an oxidizing agent. Ferrate (VI) ion production was carried out through the electrochemical method by anodic oxidation of low carbon steel (0.047%) in a divided cell reactor with a graphite cathode, a cation exchange membrane and NaOH as electrolyte. A maximum Ferrate (VI) concentration of 0,287 mol L -1 was achieved when the ratio between the anode surface and the volume of the anode chamber (SÁnode / VÁnode) was 2,21 cm-1 , the molar concentration of electrolyte (NaOH) was 20 mol/L and the current density of 80 A/m2 after 5 hours of electrolysis time. It was found that a lower production cost of Ferrate (VI) was not related with higher faradic efficiencies in the production of Ferrate (VI), with NaOH being the component that contributes to 80% of the production costs. The electrochemically produced Ferrate (VI) solution was used together with ferric chloride to remove arsenite, arsenate and mixtures of both ions in concentrations of up to 1000 µg/L in synthetic Bangladesh groundwater (SBGW), achieving high arsenic removals and reaching an arsenic residual concentration less than 10 µg / L, which is the limit established by the WHO for drinking water. The design and construction of the continuous treatment system of the SBGW using Ferrate consisted of an addition system of Ferrate (VI) to maintain an ORP of 800 mV to ensure the oxidation of the arsenite to arsenate followed by an addition of ferric chloride to adjust the final pH at 6,45 and capturing the remaining arsenate before a filter unit (5 µm pore), achieving final concentrations of arsenic below 10 µg / L operating at a flow rate of 120 L/h
Xiaoning Gong - One of the best experts on this subject based on the ideXlab platform.
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effect of potassium Ferrate vi on survival and reproduction of ichthyophthirius multifiliis tomonts
Parasitology Research, 2011Co-Authors: Gaoxue Wang, Fei Ling, Jianguo Wang, Xiaoning GongAbstract:Ichthyophthirius multifiliis is an important freshwater teleost pathogen that can infect most species of freshwater fish worldwide and often leads to significant economic losses to the aquaculture industry. Potassium Ferrate(VI), as a potential therapeutic agent for external protozoan parasite infections, has been proven to kill I. multifiliis theronts effectively; however, no information is available on effects of potassium Ferrate(VI) exposure to I. multifiliis tomonts. This study evaluated the effects of potassium Ferrate(VI) on the survival and reproduction of I. multifiliis tomonts. The results of experiment 1 showed that potassium Ferrate(VI) at concentrations of 2.4, 4.8, 9.6, and 19.2 mg/L resulted in tomont survival rates of 82.2%, 34.2%, 14.6%, and 0, respectively, and significant differences were noted in tomont reproduction between the treatments and the control (P < 0.05). Additionally, this study was designed to determine the effect of potassium Ferrate(VI) toxicity on age of the tomont. The results indicated that encysted I. multifiliis was more resistant to potassium Ferrate(VI) treatments. In addition, this study was designed to investigate I. multifiliis tomont survival and reproduction when collected from infested goldfish in potassium Ferrate(VI) solutions at different concentrations (0, 2.4, 4.8, 9.6, and 19.2 mg/L) for 30 min. It was found that the tomont survivals in the treatments were significantly lower than those in the control (P < 0.05). This study demonstrated that a bath with potassium Ferrate(VI) possibly was an effective method to treat ichthyophthiriasis.
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ORIGINAL PAPER Effect of potassium Ferrate(VI) on survival and reproduction of Ichthyophthirius multifiliis tomonts
2011Co-Authors: Fei Ling, Gaoxue Wang, Jianguo Wang, Xiaoning GongAbstract:Abstract Ichthyophthirius multifiliis is an important fresh-water teleost pathogen that can infect most species of freshwater fish worldwide and often leads to significant economic losses to the aquaculture industry. Potassium Ferrate(VI), as a potential therapeutic agent for external protozoan parasite infections, has been proven to kill I. multifiliis theronts effectively; however, no information is available on effects of potassium Ferrate(VI) exposure to I. multifiliis tomonts. This study evaluated the effects of potassium Ferrate(VI) on the survival and reproduction of I. multifiliis tomonts. The results of experiment 1 showed that potassium Ferrate(VI) at concentrations of 2.4, 4.8, 9.6, and 19.2 mg/L resulted in tomont survival rates of 82.2%, 34.2%, 14.6%, and 0, respectively, and significant differ-ences were noted in tomont reproduction between the treatments and the control (P<0.05). Additionally, this study was designed to determine the effect of potassium Ferrate(VI) toxicity on age of the tomont. The results indicated that encysted I. multifiliis was more resistant to potassium Ferrate(VI) treatments. In addition, this study was designed to investigate I. multifiliis tomont survival and reproduction when collected from infested goldfish in potassium Ferrate(VI) solutions at different concentrations (0, 2.4, 4.8, 9.6, and 19.2 mg/L) for 30 min. It was found that the tomont survivals in the treatments were signifi-cantly lower than those in the control (P<0.05). This study demonstrated that a bath with potassium Ferrate(VI) possibly was an effective method to treat ichthyophthiriasis
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prevention of ichthyophthirius multifiliis infestation in goldfish carassius auratus by potassium Ferrate vi treatment
Veterinary Parasitology, 2010Co-Authors: Fei Ling, Jianguo Wang, Ming Li, Lingtong Ye, Xiaoning GongAbstract:Ichthyophthirius multifiliis is an important freshwater teleost pathogen that often leads to significant economic losses to the aquaculture industry. The purpose of this study was to assess the acute toxicity of potassium Ferrate(VI) to I. multifiliis theront and the concentration needed to prevent I. multifiliis infestation in goldfish, Carassius auratus. Five hundred theronts were exposed to concentrations of potassium Ferrate(VI) in each well of a 96-well microtiter plate and observed for 4 h to determine the acute toxicity. Results showed that the exposure of I. multifiliis theronts to potassium Ferrate(VI) at concentrations of 4.80 mg/L or more resulted in 100% mortality by 4 h; the LC50 value was estimated to be 1.71 mg/L Aqueous static renewal 96-h bioassays were carried out to determine the acute toxicity of potassium Ferrate(VI) to goldfish. The LC50 value for potassium Ferrate(VI) in goldfish was 42.51 mg/L. Goldfish were exposed to 4000 theronts/fish in aerated tap water (a dose previously shown to result in consistent infestation) and treated with a single dose of potassium Ferrate(VI) after 30 min contact with theronts. Infection level and prevalence were recorded everyday after exposure. The results revealed that potassium Ferrate(VI) at the 4.80 mg/L or more concentrations can significantly reduce not only the number of trophonts on the fin of goldfish on day 3 (P < 0.05), but also the prevalence of ichthyophthiriasis (P<0.05). Potassium Ferrate(VI) at a concentration of 4.80 mg/L was considered to be the lowest effective dose to prevent infestation of I. multifillis in goldfish. (C) 2009 Published by Elsevier B.V.
Fei Ling - One of the best experts on this subject based on the ideXlab platform.
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effect of potassium Ferrate vi on survival and reproduction of ichthyophthirius multifiliis tomonts
Parasitology Research, 2011Co-Authors: Gaoxue Wang, Fei Ling, Jianguo Wang, Xiaoning GongAbstract:Ichthyophthirius multifiliis is an important freshwater teleost pathogen that can infect most species of freshwater fish worldwide and often leads to significant economic losses to the aquaculture industry. Potassium Ferrate(VI), as a potential therapeutic agent for external protozoan parasite infections, has been proven to kill I. multifiliis theronts effectively; however, no information is available on effects of potassium Ferrate(VI) exposure to I. multifiliis tomonts. This study evaluated the effects of potassium Ferrate(VI) on the survival and reproduction of I. multifiliis tomonts. The results of experiment 1 showed that potassium Ferrate(VI) at concentrations of 2.4, 4.8, 9.6, and 19.2 mg/L resulted in tomont survival rates of 82.2%, 34.2%, 14.6%, and 0, respectively, and significant differences were noted in tomont reproduction between the treatments and the control (P < 0.05). Additionally, this study was designed to determine the effect of potassium Ferrate(VI) toxicity on age of the tomont. The results indicated that encysted I. multifiliis was more resistant to potassium Ferrate(VI) treatments. In addition, this study was designed to investigate I. multifiliis tomont survival and reproduction when collected from infested goldfish in potassium Ferrate(VI) solutions at different concentrations (0, 2.4, 4.8, 9.6, and 19.2 mg/L) for 30 min. It was found that the tomont survivals in the treatments were significantly lower than those in the control (P < 0.05). This study demonstrated that a bath with potassium Ferrate(VI) possibly was an effective method to treat ichthyophthiriasis.
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ORIGINAL PAPER Effect of potassium Ferrate(VI) on survival and reproduction of Ichthyophthirius multifiliis tomonts
2011Co-Authors: Fei Ling, Gaoxue Wang, Jianguo Wang, Xiaoning GongAbstract:Abstract Ichthyophthirius multifiliis is an important fresh-water teleost pathogen that can infect most species of freshwater fish worldwide and often leads to significant economic losses to the aquaculture industry. Potassium Ferrate(VI), as a potential therapeutic agent for external protozoan parasite infections, has been proven to kill I. multifiliis theronts effectively; however, no information is available on effects of potassium Ferrate(VI) exposure to I. multifiliis tomonts. This study evaluated the effects of potassium Ferrate(VI) on the survival and reproduction of I. multifiliis tomonts. The results of experiment 1 showed that potassium Ferrate(VI) at concentrations of 2.4, 4.8, 9.6, and 19.2 mg/L resulted in tomont survival rates of 82.2%, 34.2%, 14.6%, and 0, respectively, and significant differ-ences were noted in tomont reproduction between the treatments and the control (P<0.05). Additionally, this study was designed to determine the effect of potassium Ferrate(VI) toxicity on age of the tomont. The results indicated that encysted I. multifiliis was more resistant to potassium Ferrate(VI) treatments. In addition, this study was designed to investigate I. multifiliis tomont survival and reproduction when collected from infested goldfish in potassium Ferrate(VI) solutions at different concentrations (0, 2.4, 4.8, 9.6, and 19.2 mg/L) for 30 min. It was found that the tomont survivals in the treatments were signifi-cantly lower than those in the control (P<0.05). This study demonstrated that a bath with potassium Ferrate(VI) possibly was an effective method to treat ichthyophthiriasis
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prevention of ichthyophthirius multifiliis infestation in goldfish carassius auratus by potassium Ferrate vi treatment
Veterinary Parasitology, 2010Co-Authors: Fei Ling, Jianguo Wang, Ming Li, Lingtong Ye, Xiaoning GongAbstract:Ichthyophthirius multifiliis is an important freshwater teleost pathogen that often leads to significant economic losses to the aquaculture industry. The purpose of this study was to assess the acute toxicity of potassium Ferrate(VI) to I. multifiliis theront and the concentration needed to prevent I. multifiliis infestation in goldfish, Carassius auratus. Five hundred theronts were exposed to concentrations of potassium Ferrate(VI) in each well of a 96-well microtiter plate and observed for 4 h to determine the acute toxicity. Results showed that the exposure of I. multifiliis theronts to potassium Ferrate(VI) at concentrations of 4.80 mg/L or more resulted in 100% mortality by 4 h; the LC50 value was estimated to be 1.71 mg/L Aqueous static renewal 96-h bioassays were carried out to determine the acute toxicity of potassium Ferrate(VI) to goldfish. The LC50 value for potassium Ferrate(VI) in goldfish was 42.51 mg/L. Goldfish were exposed to 4000 theronts/fish in aerated tap water (a dose previously shown to result in consistent infestation) and treated with a single dose of potassium Ferrate(VI) after 30 min contact with theronts. Infection level and prevalence were recorded everyday after exposure. The results revealed that potassium Ferrate(VI) at the 4.80 mg/L or more concentrations can significantly reduce not only the number of trophonts on the fin of goldfish on day 3 (P < 0.05), but also the prevalence of ichthyophthiriasis (P<0.05). Potassium Ferrate(VI) at a concentration of 4.80 mg/L was considered to be the lowest effective dose to prevent infestation of I. multifillis in goldfish. (C) 2009 Published by Elsevier B.V.
