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Simultaneous removal of arsenate and fluoride from water by Al-Fe (hydr)oxides

Junlian QIAO, Zimin CUI, Yuankui SUN, Qinghai HU, Xiaohong GUAN

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 169-179 doi: 10.1007/s11783-013-0533-0

Abstract: Al-Fe (hydr)oxides with different Al/Fe molar ratios (4∶1, 1∶1, 1∶4, 0∶1) were prepared using a co-precipitationThe 4Al:Fe was superior to other adsorbents for removal of arsenate and fluoride in the pH range of 5.0The adsorption capacity of the Al-Fe (hydr)oxides for arsenate and fluoride at pH 6.5±0.3 increased with:Fe indicated that the adsorption of arsenate and fluoride by Al-Fe (hydr)oxides was realized primarilyMoreover, there was a very good correlation between the surface hydroxyl group densities of Al-Fe (hydr

Keywords： Al-Fe (hydr)oxides     groundwater     adsorption     hydroxyl group     ligand exchange    

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Wastewater treatment by catalytic wet air oxidation process over Al-Fe pillared clays synthesized using

Halima Sassi, Gwendoline Lafaye, Hédi Ben Amor, Abdelaziz Gannouni, Mohamed Razak Jeday, Jacques Barbier-Jr

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 1, doi: 10.1007/s11783-017-0971-1

Abstract: Microwave irradiation has been used to prepare Al, Fe-pillared clays from a natural Tunisian smectiteThe obtained solids present higher surface area and pore volume than conventionally prepared Al-Fe pillaredThe microwave-derived Al-Fe pillared clays have been tested for catalytic wet air oxidation (CWAO) ofAl-Fe pillared clays prepared by microwave methodology are promising as catalysts for CWAO industrial

Keywords： Water     Catalytic wet air oxidation     Pillared clays     Microwave     Phenol    

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Fluoride ions adsorption from water by CaCO enhanced Mn–Fe mixed metal oxides

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 236-248 doi: 10.1007/s11705-022-2193-8

Abstract: Novel CaCO3-enhanced Mn–Fe mixed metal oxides (CMFC) were successfully prepared for the firstThese oxides were then employed as an adsorbent for adsorptive removal of excess fluoride ions.

Keywords： mesoporous materials     metal oxides     fluoride ion     adsorption mechanism    

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Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1581-1592 doi: 10.1007/s11705-023-2327-7

Abstract: Herein, Cu–Al bimetallic oxide was synthesized and mixed with mesoporous silica spheres via a simpleresults of X-ray diffraction, scanning electron microscopy, and energy dispersion spectroscopy, Cu–Albimetallic oxide was determined as CuO-Al2O3, and mesoporous silica spheres wereThe introduction of Al2O3 promoted the formation of surface oxygen vacancies, which

Keywords： Cu–Al bimetallic oxides     mesoporous silica spheres     peroxydisulfate     bisphenol A    

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Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl

Yadong GE, Yuanyuan DONG, Shengping WANG, Yujun ZHAO, Jing LV, Xinbin MA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 415-422 doi: 10.1007/s11705-012-1214-4

Abstract: Li/Al molar ratio and calcination temperature greatly influence the structure of crystalline phase ofLi-Al-O oxides.A high Li/Al molar ratio, which was related with LiAlO , also slowed the reaction rate.

Keywords： Wacker-type catalyst     dimethyl carbonate     methyl nitrite     spinel    

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Fe - Ni - Co - Al2O3 Cermets Inert Anode for Aluminum Electrolysis

Qiu Zhuxian,Shi Zhongning,Xu Junli

Strategic Study of CAE 2004, Volume 6, Issue 8,   Pages 35-39

Abstract: The cell was built with a graphite cathode of 120 mm×40 mm×20 mm and a Fe - Ni - Co -AlFe, Ni and Co.confirmed that the electrochemical reaction occurred in the electrolysis cell was the decomposition of Al

Keywords： aluminum electrolysis     inert anode     back EMF value    

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Diphenylarsinic acid sorption mechanisms in soils using batch experiments and EXAFS spectroscopy

Meng Zhu, Yongming Luo, Ruyi Yang, Shoubiao Zhou, Juqin Zhang, Mengyun Zhang, Peter Christie, Elizabeth L. Rylott

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 4, doi: 10.1007/s11783-020-1237-x

Abstract: Kf was significantly positive correlated with oxalate-extractable Fe2O3.)oxides (0.51–13.37).When both amorphous and crystalline metal (hydr)oxides were removed from the untreated soils, the KfThese findings strongly suggest that ligand exchange reactions with amorphous metal (hydr)oxides contributedistances of 3.34 and 3.66 Å, respectively, on Fe (hydr)oxides.

Keywords： Diphenylarsinic acid     EXAFS     Fe (hydr)oxide     Soil organic matter     Sorption mechanism    

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Catalytic combustion of volatile organic compounds using perovskite oxides catalysts—a review

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1649-1676 doi: 10.1007/s11705-023-2324-x

Abstract: Next, the characteristics and catalytic performance of perovskite oxides as catalysts for VOC removalThe challenges and the prospects regarding the design of perovskite oxides catalysts for the catalytic

Keywords： perovskite oxides     volatile organic compounds     catalytic combustion     reaction mechanism    

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Multivalent manganese oxides with high electrocatalytic activity for oxygen reduction reaction

Xiangfeng Peng, Zhenhai Wang, Zhao Wang, Yunxiang Pan

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 790-797 doi: 10.1007/s11705-018-1706-y

Abstract: A noble-metal-free catalyst based on both Mn O and MnO was prepared by using the dielectric barrier discharge technique at moderate temperature. The prepared catalyst shows a higher electrocatalytic activity towards the oxygen reduction reaction than the catalyst prepared by using the traditional calcination process. The enhanced activity could be due to the coexistence of manganese ions with different valences, the higher oxygen adsorption capacity, and the suppressed aggregation of the catalyst nanoparticles at moderate temperature. The present work would open a new way to prepare low-cost and noble-metal-free catalysts at moderate temperature for more efficient electrocatalysis.

Keywords： oxygen reduction reaction     manganese oxides     mixed valences of manganese     oxygen adsorption     dielectric barrier    

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Redox reactions of iron and manganese oxides in complex systems

Jianzhi Huang, Huichun Zhang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 5, doi: 10.1007/s11783-020-1255-8

Abstract: • Mechanisms of redox reactions of Fe- and Mn-oxides were discussed. • Oxidative reactions of Mn- andFe-oxides in complex systems were reviewed. • Reductive reaction of Fe(II)/iron oxides in complex systemsConspectus Redox reactions of Fe- and Mn-oxides play important roles in the fate and transformationreductive reactivity of Fe(II)/iron oxides in complex model systems toward contaminant degradation.such as Al, Si and Ti oxides on the redox reactivity of the systems are briefly summarized.

Keywords： Iron oxides     manganese oxides     reduction     oxidation     complex systems     reaction kinetics and mechanisms    

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The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1158-8

Abstract: Manganese oxides (MnOx) have been demonstrated to be effective materials to activate Oxone (i.e., PMS

Keywords： Peroxymonosulfate     Manganese oxides     Catalyst     Oxidant    

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Review on research and application of mesoporous transitional metal oxides in water treatment

Minghao SUI, Lei SHE

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 795-802 doi: 10.1007/s11783-013-0521-4

Abstract: This paper reviews the application of mesoporous transitional metal oxides in water treatment on basisMesoporous transitional metal oxides are characterized by their intrinsic features, such as a high surface

Keywords： mesoporous materials     transitional metal oxides     catalysis     adsorption     water treatment    

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The performance of nitrate-reducing Fe(II) oxidation processes under variable initial Fe/N ratios: The

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1366-2

Abstract:

•Bacterially-mediated coupled N and Fe processes examined in incubation

Keywords： Denitrification     N2O emission     Fe(II) oxidation     Fe/N ratio     Fe minerals    

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Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1211-1223 doi: 10.1007/s11705-022-2145-3

Abstract: The one-step highly selective oxidation of cyclohexane into cyclohexanone and cyclohexanol as the essential intermediates of nylon-6 and nylon-66 is considerably challenging. Therefore, an efficient and low-cost catalyst must be urgently developed to improve the efficiency of this process. In this study, a Co3O4–CeO2 composite oxide catalyst was successfully prepared through ultrasound-assisted co-precipitation. This catalyst exhibited a higher selectivity to KA-oil, which was benefited from the synergistic effects between Co3+/Co2+ and Ce4+/Ce3+ redox pairs, than bulk CeO2 and/or Co3O4. Under the optimum reaction conditions, 89.6% selectivity to KA-oil with a cyclohexane conversion of 5.8% was achieved over Co3O4–CeO2. Its catalytic performance remained unchanged after five runs. Using the synergistic effects between the redox pairs of different transition metals, this study provides a feasible strategy to design high-performance catalysts for the selective oxidation of alkanes.

Keywords： Co3O4–CeO2 composite oxides     cyclohexanone     cyclohexanol     ultrasonic-assisted    

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Cadmium removal mechanistic comparison of three Fe-based nanomaterials: Water-chemistry and roles ofFe dissolution

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1586-8

Abstract:

● nZVI, S-nZVI, and nFeS were systematically compared for Cd(II) removal.

Keywords： Nano zero valent iron     Sulfided zero valent iron     FeS     Cd(II) immobilization     Fe dissolution    

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Title Author Date Type Operation

Simultaneous removal of arsenate and fluoride from water by Al-Fe (hydr)oxides

Junlian QIAO, Zimin CUI, Yuankui SUN, Qinghai HU, Xiaohong GUAN

Journal Article

Wastewater treatment by catalytic wet air oxidation process over Al-Fe pillared clays synthesized using

Halima Sassi, Gwendoline Lafaye, Hédi Ben Amor, Abdelaziz Gannouni, Mohamed Razak Jeday, Jacques Barbier-Jr

Journal Article

Fluoride ions adsorption from water by CaCO enhanced Mn–Fe mixed metal oxides

Journal Article

Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Journal Article

Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl

Yadong GE, Yuanyuan DONG, Shengping WANG, Yujun ZHAO, Jing LV, Xinbin MA

Journal Article

Fe - Ni - Co - Al2O3 Cermets Inert Anode for Aluminum Electrolysis

Qiu Zhuxian,Shi Zhongning,Xu Junli

Journal Article

Diphenylarsinic acid sorption mechanisms in soils using batch experiments and EXAFS spectroscopy

Meng Zhu, Yongming Luo, Ruyi Yang, Shoubiao Zhou, Juqin Zhang, Mengyun Zhang, Peter Christie, Elizabeth L. Rylott

Journal Article

Catalytic combustion of volatile organic compounds using perovskite oxides catalysts—a review

Journal Article

Multivalent manganese oxides with high electrocatalytic activity for oxygen reduction reaction

Xiangfeng Peng, Zhenhai Wang, Zhao Wang, Yunxiang Pan

Journal Article

Redox reactions of iron and manganese oxides in complex systems

Jianzhi Huang, Huichun Zhang

Journal Article

The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

Journal Article

Review on research and application of mesoporous transitional metal oxides in water treatment

Minghao SUI, Lei SHE

Journal Article

The performance of nitrate-reducing Fe(II) oxidation processes under variable initial Fe/N ratios: The

Journal Article

Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Journal Article

Cadmium removal mechanistic comparison of three Fe-based nanomaterials: Water-chemistry and roles ofFe dissolution

Journal Article