The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Lin Yang - One of the best experts on this subject based on the ideXlab platform.
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Recycling sulfur and iron resources in the waste Ferrous Sulfate
Journal of Thermal Analysis and Calorimetry, 2014Co-Authors: Penghui Huang, Xiushan Yang, Jiang Bing, Zhiye Zhang, Xinlong Wang, Chen Xiaodong, Lin YangAbstract:Many methods have been used to treat Ferrous Sulfate, but the large volume of waste Ferrous Sulfate produced has become a bottleneck for the sustainable development of the titanium dioxide industry in China. However, a newly developed process can utilize the massive volumes of waste, thereby facilitating the sulfur cycle and the recycling of iron resources, where the ferric Sulfate obtained from Ferrous Sulfate by oxidation is decomposed reductively by pyrite, and the decomposition products are magnetite and sulfur dioxide. The reductive decomposition of ferric Sulfate by pyrite is a key step in this process. In this study, thermodynamic analysis, tubular reactor experiments, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy were used to analyze the mechanism and to determine the kinetic model of the decomposition reaction in a nitrogen atmosphere. The results of the reaction mechanism analysis showed that the process involved in the generation of Fe3O4 is a two-step reaction, i.e., pyrite reacts directly with ferric Sulfate to produce Fe2O3, before Fe2O3 reacts with pyrite to generate Fe3O4. Accordingly, the results of the kinetic analysis indicated that the first process follows an n-th order model with autocatalysis (Cn), n = 1.344; and the second process follows the Avrami–Erofe’ev nuclei growth model (An), n = 0.520.
K Gimouhopoulos - One of the best experts on this subject based on the ideXlab platform.
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treatment of cotton textile wastewater using lime and Ferrous Sulfate
Water Research, 2003Co-Authors: D Georgiou, A Aivazidis, J Hatiras, K GimouhopoulosAbstract:Abstract This technical note summarizes the results of a textile wastewater treatment process aiming at the destruction of the wastewater's color by means of coagulation/flocculation techniques using Ferrous Sulfate and/or lime. All the experiments were run in a pilot plant that simulated an actual industrial wastewater treatment plant. Treatment with lime alone proved to be very effective in removing the color (70–90%) and part of the COD (50–60%) from the textile wastewater. Moreover, the treatment with Ferrous Sulfate regulating the pH in the range 9.0±0.5 using lime was equally effective. Finally, the treatment with lime in the presence of increasing doses of Ferrous Sulfate was tested successfully, however; it proved to be very costly mainly due to the massive production of solids that precipitated.
Penghui Huang - One of the best experts on this subject based on the ideXlab platform.
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Recycling sulfur and iron resources in the waste Ferrous Sulfate
Journal of Thermal Analysis and Calorimetry, 2014Co-Authors: Penghui Huang, Xiushan Yang, Jiang Bing, Zhiye Zhang, Xinlong Wang, Chen Xiaodong, Lin YangAbstract:Many methods have been used to treat Ferrous Sulfate, but the large volume of waste Ferrous Sulfate produced has become a bottleneck for the sustainable development of the titanium dioxide industry in China. However, a newly developed process can utilize the massive volumes of waste, thereby facilitating the sulfur cycle and the recycling of iron resources, where the ferric Sulfate obtained from Ferrous Sulfate by oxidation is decomposed reductively by pyrite, and the decomposition products are magnetite and sulfur dioxide. The reductive decomposition of ferric Sulfate by pyrite is a key step in this process. In this study, thermodynamic analysis, tubular reactor experiments, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy were used to analyze the mechanism and to determine the kinetic model of the decomposition reaction in a nitrogen atmosphere. The results of the reaction mechanism analysis showed that the process involved in the generation of Fe3O4 is a two-step reaction, i.e., pyrite reacts directly with ferric Sulfate to produce Fe2O3, before Fe2O3 reacts with pyrite to generate Fe3O4. Accordingly, the results of the kinetic analysis indicated that the first process follows an n-th order model with autocatalysis (Cn), n = 1.344; and the second process follows the Avrami–Erofe’ev nuclei growth model (An), n = 0.520.
D Georgiou - One of the best experts on this subject based on the ideXlab platform.
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treatment of cotton textile wastewater using lime and Ferrous Sulfate
Water Research, 2003Co-Authors: D Georgiou, A Aivazidis, J Hatiras, K GimouhopoulosAbstract:Abstract This technical note summarizes the results of a textile wastewater treatment process aiming at the destruction of the wastewater's color by means of coagulation/flocculation techniques using Ferrous Sulfate and/or lime. All the experiments were run in a pilot plant that simulated an actual industrial wastewater treatment plant. Treatment with lime alone proved to be very effective in removing the color (70–90%) and part of the COD (50–60%) from the textile wastewater. Moreover, the treatment with Ferrous Sulfate regulating the pH in the range 9.0±0.5 using lime was equally effective. Finally, the treatment with lime in the presence of increasing doses of Ferrous Sulfate was tested successfully, however; it proved to be very costly mainly due to the massive production of solids that precipitated.
Xiushan Yang - One of the best experts on this subject based on the ideXlab platform.
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Magnetic properties of Cu0.5Mg0.5Fe2O4 nanoparticles synthesized with waste Ferrous Sulfate
Materials Today Communications, 2020Co-Authors: Wei Wang, Yirui Shu, Hengli Xiang, Pan Zhang, Genkuan Ren, Yanjun Zhong, Xiushan YangAbstract:Abstract Waste Ferrous Sulfate, which is an industrial by-product from titanium dioxide production, leads to a serious environmental pollution and waste of resources without being utilized. To enhance the utilization value of waste Ferrous Sulfate, we proposed a new idea that take the waste Ferrous Sulfate as the main starting material to synthesize cubic inverse spinel copper magnesium ferrite nanoparticles (CMFNPs) via solid-phase reduction method. The properties of the as-synthesized CMFNPs were investigated via using various analytical technologies such as thermogravimetric-differential thermal analysis (TG-DSC), powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and field emission scanning electron microscopy (FESEM) equipped with energy dispersive X-ray (EDX) spectrum. The results indicate that the synthesized CMFNPs display like-spherical structure with the average diameter of ∼70 nm. Magnetic analysis demonstrate that the CMFNPs have have a high saturation magnetization of 53 emu/g, coercivity of 0.18 kOe and remanence of 8.2 emu/g. Additionally, the CMFNPs belong to superparamagnetic properties. Hence, the synthesized CMFNPs not only makes efficient use of waste Ferrous Sulfate but also are valuable to be applied in the magnetic material.
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Recycling sulfur and iron resources in the waste Ferrous Sulfate
Journal of Thermal Analysis and Calorimetry, 2014Co-Authors: Penghui Huang, Xiushan Yang, Jiang Bing, Zhiye Zhang, Xinlong Wang, Chen Xiaodong, Lin YangAbstract:Many methods have been used to treat Ferrous Sulfate, but the large volume of waste Ferrous Sulfate produced has become a bottleneck for the sustainable development of the titanium dioxide industry in China. However, a newly developed process can utilize the massive volumes of waste, thereby facilitating the sulfur cycle and the recycling of iron resources, where the ferric Sulfate obtained from Ferrous Sulfate by oxidation is decomposed reductively by pyrite, and the decomposition products are magnetite and sulfur dioxide. The reductive decomposition of ferric Sulfate by pyrite is a key step in this process. In this study, thermodynamic analysis, tubular reactor experiments, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy were used to analyze the mechanism and to determine the kinetic model of the decomposition reaction in a nitrogen atmosphere. The results of the reaction mechanism analysis showed that the process involved in the generation of Fe3O4 is a two-step reaction, i.e., pyrite reacts directly with ferric Sulfate to produce Fe2O3, before Fe2O3 reacts with pyrite to generate Fe3O4. Accordingly, the results of the kinetic analysis indicated that the first process follows an n-th order model with autocatalysis (Cn), n = 1.344; and the second process follows the Avrami–Erofe’ev nuclei growth model (An), n = 0.520.