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Synergetic Bioproduction of Short-Chain Fatty Acids from Waste Activated Sludge Intensified by the Combined Use of Potassium Ferrate and Biosurfactants
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作者 CHEN Yanyan YAO Shuo +2 位作者 ZHANG Dahai LI Xianguo FENG Lijuan 《Journal of Ocean University of China》 SCIE CAS CSCD 2024年第3期695-709,共15页
The synergetic effect and underlying mechanism of potassium ferrate(PF)with tea saponin(TS,a biosurfactant)in producing short chain fatty acids(SCFAs)from anaerobic fermentation of waste activated sludge(WAS)were expl... The synergetic effect and underlying mechanism of potassium ferrate(PF)with tea saponin(TS,a biosurfactant)in producing short chain fatty acids(SCFAs)from anaerobic fermentation of waste activated sludge(WAS)were explored in this work.Experimental results showed that 0.2 g PF(g TSS)^(-1)(total suspended solid)combined with 0.02 g TS(g TSS)^(-1) could further improve SCFAs’production,and the maximum SCFAs content reached 2008.7 mg COD L^(-1),which is 1.2 and 4.5 times higher than those with PF and TS individually added,respectively,and 5.3 times higher than that of blank WAS on Day 12.In the model substrates experiments,the degradation rates of bovine serum albumin and dextran with combination of PF and TS were 41.3%±0.1% and 48.5%±0.06%,respectively,on Day 3,which are lower than those in blank WAS(with degradation rates of 72.3%±0.5%and 90.3%±0.3%).It was revealed that the oxidative effect of PF and the solubilization of TS caused more organic matters to be dissolved out from WAS,providing a large number of biodegradable substances for subsequent SCFAs production.While WAS pretreated with the combination of PF and TS,the relative abundances of Firmicutes increased from 6.4%(blank)to 38.6%,and that of Proteobacteria decreased from 41.8%(blank)to 21.8%.The combination of PF and TS promoted the hydrolysis process of WAS by enriching Firmicutes,and then increased acetic acid production by inhibiting Proteobacteria that consumed SCFAs.Meanwhile,at the genus level,acidogenesis bacteria(e.g.,Proteiniclasticum and Petrimonas)were enriched whereas SCFAs consuming bacteria(e.g.,Dokdonella)were inhibited. 展开更多
关键词 waste activated sludge anaerobic fermentation potassium ferrate BIOSURFACTANT PRETREATMENT
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Flotation behaviors of chalcopyrite and galena using ferrate(Ⅵ) as a depressant 被引量:1
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作者 Yongxing Zheng Yusong Huang +3 位作者 Panjin Hu Xianhui Qiu Jinfang Lv Lingyun Bao 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2023年第1期93-103,共11页
This paper investigated the effects of potassium ferrate(PF)on the flotation performances of chalcopyrite and galena.The flotation results showed that PF obviously depressed galena,but had little effects on the floata... This paper investigated the effects of potassium ferrate(PF)on the flotation performances of chalcopyrite and galena.The flotation results showed that PF obviously depressed galena,but had little effects on the floatability of chalcopyrite within pH range of 4.0–12.0.Zeta potential tests showed that the addition of PF induced the formation of more amounts of hydrophilic species on the surface of galena under an alkaline environment.Industrial grade O-isopropyl-N-ethyl thionocarbamate(IPETC)chemically adsorbed on the surface of the PF-treated chalcopyrite and galena after its addition.Contact angle measurements showed that with the addition of PF,the contact angle of the galena surface significantly decreased compared with the chalcopyrite surface.Localized electrochemical impedance spectroscopy(LEIS)tests showed that the addition of PF increased the impedance of the galena surface.X-ray photoelectron spectroscopy(XPS)analyses revealed that the formation of hydrophilic species,namely lead sulfite,lead hydroxide and ferric hydroxide,on the galena surface,decreased its floatability in the presence of PF,while the formation of hydrophobic species,namely copper disulfide and elemental sulfur,on the chalcopyrite surface,maintained its floatability.Finally,a descriptive model for the reaction of PF with chalcopyrite and galena was proposed. 展开更多
关键词 FLOTATION CHALCOPYRITE GALENA Potassium ferrate
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Effects of Potassium Ferrate and Low-Temperature Thermal Hydrolysis Co-Pretreatment on the Hydrolysis and Anaerobic Digestion Process of Waste Activated Sludge
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作者 MA Yingpeng HAO Di +3 位作者 YAO Shuo ZHANG Dahai LI Xianguo FENG Lijuan 《Journal of Ocean University of China》 SCIE CAS CSCD 2023年第6期1583-1591,共9页
This study evaluated the effect of potassium ferrate(PF)and low-temperature thermal hydrolysis co-pretreatment on the promotion of sludge hydrolysis process and the impact on acid production in the subsequent anaerobi... This study evaluated the effect of potassium ferrate(PF)and low-temperature thermal hydrolysis co-pretreatment on the promotion of sludge hydrolysis process and the impact on acid production in the subsequent anaerobic digestion process.The analytical investigations showed that co-pretreatment significantly facilitated the hydrolysis process of the sludge and contributed to the accumulation of short-chain fatty acids(SCFAs).The pretreatment conditions under the optimal leaching of organic matter from sludge were hydrothermal temperature of 75℃,hydrothermal treatment time of 12 h,and PF dosage of 0.25 g g^(−1)TSS(total suspended solids),according to the results of orthogonal experiments.By pretreatment under proper conditions,the removal rate of soluble chemical oxygen demand(SCOD)achieved 71.8%at the end of fermentation and the removal rate of total phosphorus(TP)was 69.1%.The maximum yield of SCFAs was 750.3 mg L^(−1),7.45 times greater than that of the blank group.Based on the analysis of the anaerobic digestion mechanism,it was indicated that the co-pretreatment could destroy the floc structure on the sludge surface and improve organic matter dissolving,resulting in more soluble organic substances for the acidification process.Furthermore,microbial community research revealed that the main cause of enhanced SCFAs generation was an increase in acidogenic bacteria and a reduction of methanogenic bacteria. 展开更多
关键词 waste activated sludge potassium ferrate low-temperature thermal hydrolysis anaerobic digestion short-chain fatty acids
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Effect of Degree of ClO&oline;Hypochlorite on the Wet Synthesis of Ferrate (VI) 被引量:1
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作者 Abdellatif El Maghraoui Abdelaziz Zerouale Mustapha Ijjaali 《Advances in Materials Physics and Chemistry》 2015年第4期133-139,共7页
This work is a result of previously done studies on the synthesis of A2FeVIO4 wet ferrate (VI) formula, using chlorine as an oxidant. The major problem of these ferrates is related to their stability over time. This b... This work is a result of previously done studies on the synthesis of A2FeVIO4 wet ferrate (VI) formula, using chlorine as an oxidant. The major problem of these ferrates is related to their stability over time. This brings us to identify and optimize the critical parameters influencing the preparation of the Na2FeO4 at room stable phase with acceptable performance. The use of water bleach (hypochlorite ClO&oline;) at a chlorometric degree of 50°F in the synthesis of the Na2FeO4 ambient stable phase promotes the oxidation of iron (II) iron to (VI) in a concentrated NaOH alkaline medium. The synthesis reaction is in the presence of FeSO4 7H2O hydrated iron sulfate at a temperature of about 55°C in order to simplify the synthesis process, to enhance the production of the Fe (VI) and to meet the growing demand of ferrates (VI) for their interest in the treatment of water. Monitoring the degradation of synthesized Na2FeO4 shows its stability up to 12 months, which facilitates storage and transportation. The phases obtained were characterized by IR spectroscopy, and RX by UV spectrophotometer, measuring the optical density at 507 nm. 展开更多
关键词 ferrates BACTERICIDES Antioxidant FLOCCULANT COAGULANT WET Water Treatment
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Application of ferrate(VI) in the treatment of industrial wastes containing metal-complexed cyanides : A green treatment 被引量:17
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作者 SEUNG-MOK Lee DIWAKAR Tiwari 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第10期1347-1352,共6页
Ferrate(VI) was employed for the oxidation of cyanide (CN) and simultaneous removal of copper or nickel in the mixed/complexed systems of CN-Cu, CN-Ni, or CN-Cu-Ni. The degradation of CN (1.00 mmol/L) and remova... Ferrate(VI) was employed for the oxidation of cyanide (CN) and simultaneous removal of copper or nickel in the mixed/complexed systems of CN-Cu, CN-Ni, or CN-Cu-Ni. The degradation of CN (1.00 mmol/L) and removal of Cu (0.095 mmol/L) were investigated as a function of Fe(Ⅵ) doses from 0.3-2.00 mmol/L at pH 10.0. It was found that Fe(Ⅵ) could readily oxidize CN and the reduction of Fe(Ⅵ) into Fe(Ⅲ) might serve efficiently for the removal of free copper ions. The increase in Fe(Ⅵ) dose apparently favoured the CN oxidation as well as Cu removal. Moreover, the pH dependence study (pH 10.0-13.0) revealed that the oxidation of CN was almost unaffected in the studied pH range (10.0-13.0), however, the maximum removal efficiency of Cu was obtained at pH 13.0. Similarly, treatment was carded out for CN-Ni system having the initial Ni concentration of 0.170 mmol/L and CN concentration of 1.00 mmol with Fe(Ⅵ) dose 2.00 mmol at various pH values (10.0-12.0). Results showed a partial oxidation of CN and partial removal of Ni. It can be observed that Fe(Ⅵ) can partially degrade the CN-Ni complex in this pH range. Further, Fe(Ⅵ) was applied for the treatment of simulated industrial waste/effluent waters treatment containing CN, Cu, and Ni. 展开更多
关键词 CYANIDE metal-complexed cyanide oxidation copper nickel ferrate(Ⅵ)
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Physicochemical properties of arsenic-bearing lime-ferrate sludge and its leaching behaviors 被引量:11
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作者 Bing PENG Jie LEI +3 位作者 Xiao-bo MIN Li-yuan CHAI Yan-jie LIANG Yang YOU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第5期1188-1198,共11页
Physicochemical properties and leaching behaviors of two typical arsenic-bearing lime?ferrate sludges(ABLFS),waste acid residue(WAR)and calcium arsenate residue(CAR),are comprehensively described.The chemical composit... Physicochemical properties and leaching behaviors of two typical arsenic-bearing lime?ferrate sludges(ABLFS),waste acid residue(WAR)and calcium arsenate residue(CAR),are comprehensively described.The chemical composition,morphological features,phase composition and arsenic occurrence state of WAR and CAR are analyzed by ICP?AES,SEM?EDS,XRD,XPS and chemical phase analysis.The toxicity leaching test and three-stage BCR sequential extraction procedure are utilized to investigate arsenic leaching behaviors.The results show that the contents of arsenic in WAR and CAR are2.5%and21.2%and mainly present in the phases of arsenate and arsenic oxides dispersed uniformly or agglomerated in amorphous particles.The leaching concentrations of arsenic excess119and1063times of TCLP standard regulatory level with leaching rates of47.66%and50.15%for WAR and CAR,respectively.About90%of extracted arsenic is in the form of acid soluble and reducible,which is the reason of high arsenic leaching toxicity and environmental activity of ABLFS.This research provides comprehensive information on harmless disposal of ABLFS from industrial wastewater treatment of lime?ferrate process. 展开更多
关键词 arsenic-bearing sludge lime.ferrate sludge physicochemical properties leaching behavior BCR sequential extraction
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Comparative study on the removal technologies of 2-methylisoborneol(MIB) in drinking water 被引量:5
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作者 LIANG Cun-zhen WANG Dong-sheng +2 位作者 GE Xiao-peng YANG Min SUN Wei 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2006年第1期47-51,共5页
Removal of 2-methylisoborneol (MIB) in drinking water by ozone, powdered activated carbon (PAC), potassium permanganate and potassium ferrate was investigated. The adsorption kinetics of MIB by both wood-based and... Removal of 2-methylisoborneol (MIB) in drinking water by ozone, powdered activated carbon (PAC), potassium permanganate and potassium ferrate was investigated. The adsorption kinetics of MIB by both wood-based and coat-based PACs show that main removal of MIB occurs within contact time of 1 h. Compared with the wood-based PAC, the coat-based PAC evidently improved the removal efficiency of MIB. The removal percentage of trace MIB at any given time for a particular carbon dosage was irrelative to the initial concentration of MIB. A series of experiments were performed to determine the effect of pH on the ozonation of MIB. The results show that pH has a significant effect on the ozonation of MIB. It is conclusive that potassium permanganate and potassium ferrate are ineffective in removing the MIB in drinking water. 展开更多
关键词 ODOR MIB OZONATION powdered activated carbon potassium permanganate potassium ferrate
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Double catholyte electrochemical approach for preparing ferrate-aluminum: a compound oxidant-coagulant for water purification 被引量:3
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作者 QuJH LeiPJ 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2002年第1期49-53,共5页
Ferrate is an excellent water treatment agent for its multi functions in oxidation, disinfection, coagulation and adsorption, but its coagulation ability depends on its dosage and is after its oxidation. This paper f... Ferrate is an excellent water treatment agent for its multi functions in oxidation, disinfection, coagulation and adsorption, but its coagulation ability depends on its dosage and is after its oxidation. This paper focuses on preparing a new kind of ferrate combined with alum to enhance its coagulation function for water purification. An effective electrolysis reactor was designed and employed in the test. Some key parameters in the process of electrolysis concerning the preparation efficiency, such as the current density, temperature and alkalinity were also investigated. The proper conditions for ferrate alum preparation were determined. Under the condition of 5V given voltage, 6h electrolyzing interval, below 2% alum concentration (in weight), a combined liquid ferrate alum products was successfully prepared, which contained 0.0294 mol/L FeO 2- 4 and 0.0302 mol/L total soluble ferron with 2% Al 2O 3. There was no insoluble ferron produced by controlling an optimum electrochemical condition. 展开更多
关键词 combined ferrate alum electrochemical preparation oxidation COAGULATION
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Preparation of CS-CMC Bipolar Membrane and its Application in Electro-generated FeO_4^(2-) 被引量:5
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作者 Yu Xi REN Zhen CHEN Ri Yao CHEN Xi ZHEN Ya Ming GENG 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第11期1527-1530,共4页
CS-CMC bipolar membrane was prepared and the cross-section photograph of CS-CMC BM was observed by SEM. FT-IR spectrum indicated that CS-CMC BM contained -N=CRH2^+ and -COO^- functional groups. The charge density of ... CS-CMC bipolar membrane was prepared and the cross-section photograph of CS-CMC BM was observed by SEM. FT-IR spectrum indicated that CS-CMC BM contained -N=CRH2^+ and -COO^- functional groups. The charge density of -N--CRH2^+ in CS membrane was about 14.13 mmol/g and the charge density of -COO in CMC membrane was about 9.01 mmol/g. The electrochemistry properties of CS-CMC BM were also studied. CS-CMC BM not only can effectively stop FeO4^2- from diffusing into the cathode chamber, but also plays an important role in the supply of OH" consumed during the electro-generated FeO4^2- process. 展开更多
关键词 Bipolar membrane (BM) cylinder electrolysis bath carboxymethylcellulose (CMC) chitosan (CS) ferrate (FeO4^2-) colloid titration.
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Preparation of Solid Waste-Based Activated Carbon and Its Adsorption Mechanism for Toluene 被引量:2
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作者 Li Zhi Li Yunpeng +3 位作者 Liu Jun Si Wenzhe Zhang Yongfa Li Junhua 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2022年第1期100-110,共11页
Regenerated activated carbon(RAC)samples were prepared by carbon activation using waste activated carbon from solid waste resources as the carbon source precursor coupled with adding alkaline additives,and then were f... Regenerated activated carbon(RAC)samples were prepared by carbon activation using waste activated carbon from solid waste resources as the carbon source precursor coupled with adding alkaline additives,and then were further modified by potassium ferrate to finally prepare high-performance carbon for VOCs adsorption.At the same time,the samples before and after modification were systematically studied through characterization techniques such as SEM,Raman spectrometry,FT-IR,XPS,and dynamic/static adsorption.The results showed that the specific surface area and pore volume of the RAC after modification by the strong oxidant potassium ferrate increased by 1.4 times;the degree of defects was enhanced and the content of oxygen-containing functional groups on the surface increased significantly.Among them,the sample modified with potassium ferrate for 24 h had the best dynamic toluene adsorption performance(375.5 mg/g),and the dynamic adsorption capacity was twice that of the original sample(192.8 mg/g).The static adsorption test found that the maximum adsorption capacity of RAC-6%K_(2)FeO_(4)+H_(2)SO_(4)-24h was 796 mg/g,which indicated that the potassium ferrate modification treatment could significantly increase the VOCs adsorption performance of RAC.In addition,through consecutive toluene adsorption-desorption cycle tests,it was found that the RAC-6%K_(2)FeO_(4)+H_(2)SO_(4)-24h sample still retained 91%of adsorption activity after the fifth regeneration cycle.This indicates that RAC-6%K_(2)FeO_(4)+H_(2)SO_(4)-24h has good cycle stability and great application value for the efficient purification of industrial waste VOCs gas. 展开更多
关键词 waste activated carbon toluene adsorption potassium ferrate modification oxygen-containing functional groups regeneration ability
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Interaction mechanism of ferrate(Ⅵ) with arsenopyrite surface and its effect on flotation separation of chalcopyrite from arsenopyrite 被引量:1
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作者 Run-peng LIAO Pan-jin HU +4 位作者 Shu-ming WEN Yong-xing ZHENG Xian-hui QIU Jin-fang LÜ Jian LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第11期3731-3743,共13页
Potassium ferrate(K_(2)FeO_(4)) was used as a novel environmental-friendly depressant,and its inhibition effect on flotation performance of arsenopyrite and chalcopyrite using potassium ethyl xanthate(PEX)as a collect... Potassium ferrate(K_(2)FeO_(4)) was used as a novel environmental-friendly depressant,and its inhibition effect on flotation performance of arsenopyrite and chalcopyrite using potassium ethyl xanthate(PEX)as a collector was investigated by flotation experiments,contact angle measurements,adsorption measurements,localized electrochemical impedance spectroscopy(LEIS)measurements,and X-ray photoelectron spectroscopy(XPS)analyses.The results showed that K_(2)FeO_(4)strongly depressed arsenopyrite in a pH range of 4−11,and the flotation separation of chalcopyrite from arsenopyrite could be realized in the presence of 5×10^(−4)mol/L K_(2)FeO_(4)and 5×10^(−5)mol/L PEX at pH 8 or 10.In the presence of K_(2)FeO_(4) and PEX,the contact angle and the xanthate adsorption capacity of arsenopyrite decreased significantly.LEIS measurements showed that the addition of ferrate could significantly increase the impedance of the arsenopyrite surface.XPS analyses further confirmed that ferrate accelerated the oxidation of arsenopyrite surface. 展开更多
关键词 ferrate(Ⅵ) ARSENOPYRITE CHALCOPYRITE low-alkalinity flotation separation
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Versatile Functionalization of Carbon Nanomaterials by Ferrate(Ⅵ) 被引量:1
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作者 Ying Zhou Zhao‑Yang Zhang +2 位作者 Xianhui Huang Jiantong Li Tao Li 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第3期12-21,共10页
As a high-valent iron compound with Fe in the highest accessible oxidation state,ferrate(VI)brings unique opportunities for a number of areas where chemical oxidation is essential.Recently,it is emerging as a novel ox... As a high-valent iron compound with Fe in the highest accessible oxidation state,ferrate(VI)brings unique opportunities for a number of areas where chemical oxidation is essential.Recently,it is emerging as a novel oxidizing agent for materials chemistry,especially for the oxidation of carbon materials.However,the reported reactivity in liquid phase(H2SO4 medium)is confusing,which ranges from aggressive to moderate,and even incompetent.Meanwhile,the solid-state reactivity underlying the“dry”chemistry of ferrate(VI)remains poorly understood.Herein,we scrutinize the reactivity of K2FeO4 using fullerene C60 and various nanocarbons as substrates.The results unravel a modest reactivity in liquid phase that only oxidizes the active defects on carbon surface and a powerful oxidizing ability in solid state that can open the inert C=C bonds in carbon lattice.We also discuss respective benefit and limitation of the wet and dry approaches.Our work provides a rational understanding on the oxidizing ability of ferrate(VI)and can guide its application in functionalization/transformation of carbons and also other kinds of materials. 展开更多
关键词 Ferrate(VI) REACTIVITY Carbon nanomaterials OXIDATION
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Oxidative Desulfurization of Model Sulfur Compound by Potassium Ferrate in the Presence of Phosphomolybdic Acid Catalyst 被引量:1
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作者 Liu Yanxiu Song Hua Zhang Wenchao 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2013年第1期61-65,共5页
In this work, the removal of thiophene from simulated oil has been studied by using the adsorption, extraction and oxidation/adsorption methods, respectively. In the adsorptive desulfurization process, different comme... In this work, the removal of thiophene from simulated oil has been studied by using the adsorption, extraction and oxidation/adsorption methods, respectively. In the adsorptive desulfurization process, different commercial adsorbents were used to eliminate thiophene at ambient pressure and mild temperature, and the results showed that carbon powder had the best adsorption ability. In the extractive desulfurization process, the best desulfurization result was obtained when DMF is used. In the oxidative/adsorptive desulfurization procedure using synthesized potassium ferrate as the oxidant and phosphomolybdic acid solution as the catalyst, thiophene was oxidized and removed from hydrocarbons in combination with active carbon adsorption, and the residual sulfur content of simulated oil could be reduced to 15.3mg/L from the original level of 200mg/L, with the desulfurization rate reaching 92.3%. 展开更多
关键词 oxidative desulfurization phosphomolybdic acid potassium ferrate
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Treatment of Phenol-Contaminated Soil by Potassium Ferrate Based on pH Control 被引量:1
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作者 Lu Zheng Zhang Yanqing +4 位作者 Jia Xin Huang Jin Xue Jianliang Zhuang Hongli Liu Guangmin 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2018年第3期55-61,共7页
This study aims to optimize the treatment of phenol-contaminated soil by potassium ferrate. Variations in pH value can accurately reflect the state and reaction status of the entire treatment process. Therefore, the p... This study aims to optimize the treatment of phenol-contaminated soil by potassium ferrate. Variations in pH value can accurately reflect the state and reaction status of the entire treatment process. Therefore, the pH value could be an important variable for optimizing the reaction conditions and achieving the automatic control of the process. About 99.89% of phenol was removed after 10 min of the pH-contxolled reaction at a rotational speed of 40-70 r/min, with the initial phenol concentration equating to 10.0 g/kg and the total water consumption reaching 2.72 L (at a soil/water ratio of 1:0.68). The test results could provide a basis for practical application of automatic reaction control by pH value. 展开更多
关键词 potassium ferrate phenol contaminated soil DEGRADATION PH automatic control
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Synthesis and Characterization of Ferrate(VI) Alkali Metal by Electrochemical Method 被引量:2
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作者 Abdellatif El Maghraoui Abdeleaziz Zerouale +1 位作者 Mustapha Ijjaali Mohamed Sajieddine 《Advances in Materials Physics and Chemistry》 2013年第1期83-87,共5页
This works aims at preparing at room stable Na2FeO4 and tracking its degradation over time. The synthetic, during this step, was carried out by electrochemical method. The latter was given maximum focus because of its... This works aims at preparing at room stable Na2FeO4 and tracking its degradation over time. The synthetic, during this step, was carried out by electrochemical method. The latter was given maximum focus because of its simplicity and the high degree of purity of the resulting product with respect to wet and dry method. This paper reviews the development of the electrochemical method applied to the synthesis of stable at room Na2FeO4, optimizing the parameters impacting the performance of the oxidation of iron(II) in to iron(VI) in alkaline NaOH, saturated at a temperature of 61°C and a current density of 1.4 A/dm2, in order to simplify the synthesis process, to minimize the cost and to improve the production of iron(VI) to meet the growing demand of ferrate(VI) useful for water treatment. The supervision of the degradation of synthesized Na2FeO4 shows its stability over a period of 10 months, which makes storage and transport easier. The phases obtained were characterized by IR spectrometry, X-ray, M?ssbauer, spectroscopy and thermogravimeric analysis. 展开更多
关键词 FERRATE BACTERICIDAL OXIDANT FLOCCULANTS COAGULANT CONDUCTIVITY Cathode
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Electrogeneration of ferrate (Ⅵ) in low concentration NaOH solution for flow-injection-chemiluminescence detection
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作者 Hui Jing Zhang Yong Gang Hu +1 位作者 Yong Qian Wang Jie Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第8期951-954,共4页
The possibility of direct analytical applications of ferrate(Ⅵ) solution,which was freshly electrogenerated in low-concentration NaOH electrolyte,was studied by a flow-injection-chemiluminescence(FI-CL) system.It... The possibility of direct analytical applications of ferrate(Ⅵ) solution,which was freshly electrogenerated in low-concentration NaOH electrolyte,was studied by a flow-injection-chemiluminescence(FI-CL) system.It was found that some inorganic ions, organic molecule and biomolecule could enhance the chemiluminescence emission caused by ferrate(Ⅵ)-luminol reaction.V(Ⅴ), Ca(Ⅱ),Mg(Ⅱ),phloroglucinol,and bovine hemoglobin(Hb) chosen as samples were successfully detected by this developed method.The analytical characteristics of the system for the analytes determination including linear ranges,correlation coefficients, limits of detection combined with FI analysis were studied. 展开更多
关键词 CHEMILUMINESCENCE Flow-injection analysis Ferrate(Ⅵ)
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Preparation of Potassium Ferrate (VI) via β-Fe_2O_3
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作者 冀亚飞 王世海 +1 位作者 王跃龙 魏贤勇 《International Journal of Mining Science and Technology》 SCIE EI 1999年第1期22-24,共3页
β-Fe2O3·H2O is prepared by reacting FeCl3, K2CO3, an oxidizing agent HIO4 and a metal chelating agent K3PO4 at 65~ 70℃. The prepared β-Fe2O3' H2O is introduced into the mixture of KOH, KOCl and a ferrate s... β-Fe2O3·H2O is prepared by reacting FeCl3, K2CO3, an oxidizing agent HIO4 and a metal chelating agent K3PO4 at 65~ 70℃. The prepared β-Fe2O3' H2O is introduced into the mixture of KOH, KOCl and a ferrate stabilizer KI, and reacted at room temperature for 5 h to produce a ferrate-containing cake. The cake is dried to give a water-free dried potassium ferrate (VI). 展开更多
关键词 potassium ferrate (VI) β-Fe_2O_3·H_2O PREPARATION water treatment
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Synthesis, Crystal Structure and Thermal Behavior of a 3-D Barium(II)/Iron(III)-Oxalate Polymer
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作者 Noé Makon Ma Houga Brian S. Dolinar +1 位作者 Justin Nenwa Gouet Bebga 《Open Journal of Inorganic Chemistry》 2014年第2期21-29,共9页
Reaction of Ba(NO3)2 with Fe(NO3)3·9H2O and H2C2O4·2H2O in aqueous medium readily affords, in high yield, the bimetallic complex polymer of chemical composition {Ba6(H2O)17[Fe(C2O4)3]4}·7H2O (1), consis... Reaction of Ba(NO3)2 with Fe(NO3)3·9H2O and H2C2O4·2H2O in aqueous medium readily affords, in high yield, the bimetallic complex polymer of chemical composition {Ba6(H2O)17[Fe(C2O4)3]4}·7H2O (1), consistent with the expected ratio of 3BaII vs. 2FeIII. Compound 1 was fully characterized by elemental and thermal analyses, vibrational FTIR spectroscopy, and by single crystal X-ray structure determination. The bulk structure of 1 is a 3-D metal-organic framework held together by intermetallic linkages across oxalate and aqua oxygen bridgings. Thermal analyses of 1 show significant weight losses corresponding to water molecules (lattice and coordinated), followed by the decomposition of the network. 展开更多
关键词 Tris(Oxalato)Ferrate(III) Anion Bimetallic Complex POLYMER Crystal Structure Thermal Stability
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Some Applications of Mossbauer Spectroscopy
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作者 Jozef Sitek Katarina Sedlackova Julius Dekan 《Journal of Physical Science and Application》 2013年第5期295-300,共6页
Mossbauer spectroscopy was established as an analytical method 50 years ago and it is still of current interest in many disciplines as mineralogy, environmental science, archeology and biology. Areas of research where... Mossbauer spectroscopy was established as an analytical method 50 years ago and it is still of current interest in many disciplines as mineralogy, environmental science, archeology and biology. Areas of research where Mossbauer spectroscopy is contributing are metals and alloys, magnetic materials, chemical compounds and oxidation states, nanoparticles and many others. Different types of amorphous and nanocrystalline materials (e.g. finemet, nanoperm and hitperm) can be analyzed under different external influence like neutron irradiation or external magnetic field. Mineralogical samples as potassium white micas in sheared basement cover rocks from the Central Western Carpathians and meteorites can be also effectively investigated using MOssbauer spectroscopy. Phase analysis of meteorites can be helpful in their classification and moreover, particular magnetic and non-magnetic components can be analyzed in details. At present, the Mossbauer spectroscopy is also used to analyze environmental materials like zeolites, volcanic tephra and compounds containing ferrate (Fe6+). 展开更多
关键词 Mossbauer spectroscopy nanocrystalline materials white micas Kosice meteorite ferrate Fe6+.
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Process for the Synthesis of Ferrate (VI) Alkali Metal Dry
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作者 Abdellatif El Maghraoui Abdelaziz Zerouale Mustapha Ijjaali 《Advances in Materials Physics and Chemistry》 2015年第1期10-15,共6页
The iron compounds in the oxidation state (VI) have the specific advantage of being powerful oxidants and bactericides. This feature explains their particular interest in the treatment of water. The aim of this work i... The iron compounds in the oxidation state (VI) have the specific advantage of being powerful oxidants and bactericides. This feature explains their particular interest in the treatment of water. The aim of this work is to prepare Na2FeO4 stable at ambient in order to optimize the key parameters influencing the performance of the oxidation of iron (II) to iron (VI), as well as to monitor its degradation over time. The synthesis of this phase has been carried out by using the dry reaction Na2O2 with Fe2O3 with a temperature of 700&deg;C for a reaction time of 13 hours with a Na/Fe ratio of 4 to make it possible to simplify the synthesis procedure, to minimize the cost and enhance the production of iron (VI) to meet the growing demand of ferrate (VI) for its interest in water treatment. The obtained phase was characterized by UV spectrophotometer by measuring the optical density at a wavelength of 507 nm. 展开更多
关键词 FERRATE BACTERICIDE ANTIOXIDANT FLOCCULANT COAGULANT Water Treatment
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