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| 1 | Photocatalytic degradation of methylene blue by nanostructured Fe/FeS powder under visible light显示文摘The photocatalytic performance of mechano-thermally synthesized Fe/FeS nanostructures formed from micron-sized starting materials was compared with that of a thermally synthesized nanostructure with nano-sized precursors in this paper. The properties of as-synthesized materials were studied by X-ray diffraction(XRD), transmission electron microscopy(TEM), vibrating sample magnetometry(VSM), diffuse reflectance spectroscopy(DRS), and ultraviolet–visible(UV-Vis) spectroscopy. The effects of irradiation time, methylene blue(MB) concentration, catalyst dosage, and p H value upon the degradation of MB were studied. Magnetic properties of the samples showed that both as-synthesized Fe/FeS photocatalysts are magnetically recoverable, eliminating the need for conventional filtration steps. Degradation of 5 ppm of the MB solution by mechano-thermally synthesized Fe/FeS with a photocatalyst dosage of 1 kg/m^3 at pH 11 can reach 96% after 12 ks irradiation under visible light. The photocatalytic efficiency is higher in alkaline solution. The kinetics of photocatalytic degradation in both samples is controlled by a first-order reaction. However, the rate-constant value in the thermally synthesized Fe/FeS photocatalyst sample is only 1.5 times greater than that of the mechano-thermally synthesized one. | Hassan Esmaili Amir Kotobi Saeed Sheibani Fereshteh Rashchi | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，2： | 11 |
| 2 | Ti leaching from activated ilmenite–Fe mixture at different milling energy levels显示文摘Mechanical activation processes on ilmenite concentrate were performed in three different energy levels. Iron powder as a reducing agent was added to ilmenite in the milling stage and the mechanically activated mixture was subjected to acid leaching. The leaching experiments were designed using the Taguchi method, and the optimum ranges were obtained. Furthermore, response surface methodology(RSM) was used to optimize the critical parameters in the leaching system to achieve the highest titanium(Ti) leachability. Based on the inductively coupled plasma-optical emission spectrometry(ICP-OES) results, maximum leaching recovery of Ti(80%) was obtained using activated Ti concentrates at a medium activation energy level, which is calculated to be 25.38 kJ/g, using 15 vol% hydrochloric acid(HCl), a temperature of 70°C, leaching time of 3 h, and a solid-to-liquid ratio of 0.05 g×mL^(–1). Intensifying the milling energy from a low to high level led to a decrease in the mean crystallite size and also structure homogenization at the high energy level. According to the transmission electron microscopy(TEM) images, the mean grain size of the ilmenite/Fe nanocomposite was about 30 nm at the medium energy level sample. Finally, solvent extraction by tributyl phosphate(TBP) was performed on the leach liquor to separate dissolved Fe(the major impurity) from Ti, which led to 83% extraction recovery of Ti. | Elham Hosseini Fereshteh Rashchi Abolghasem Ataie | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，11： | 3 |
| 3 | A shrinking particle-shrinking core model for leaching of a zinc ore containing silica显示文摘 | Vida Safari G A Fereshteh Rashchi Navid Mostoufi | 2009 | Mineral Processing2009，93，1： | 1 |
| 4 | Selective recovery and separation of nickel and vanadium in sulfate media using mixtures of D2EHPA and Cyanex272 显示文摘 | Mehdi Noori Fereshteh Rashchi Ataollah Babakhani etal | 2014 | Separation and Purification Technology2014，136，5： | 1 |
| 5 | Selective separationofnickelandcadmiumfromsulfate solutions of spent nickel-cadmium batteries using mixtures of D2EHPA and Cyanex 302 显示文摘 | Ataollah Babakhani Fereshteh Rashchi Alireza Zakeri etal | 2014 | Journal of Power Sources2014，274，1： | 1 |
| 6 | Hydrometallurgical treatment of tailings with high zinc content显示文摘 | Shirin Espiari Fereshteh Rashchi S.K. Sadrnezhaad | 2006 | Hydrometallurgy2006，，1： | 1 |
| 7 | Diagnostic pre-treatment procedure for simultaneous cyanide leaching of gold and silver from a refractory gold/silver ore显示文摘 | Mojtaba Saba Ali MohammadYousefi Fereshteh Rashchi Javad Moghaddam | 2011 | Minerals Engineering2011，，15： | 1 |
| 8 | Hydrometallurical treatment of tailings with high zinc content 显示文摘 | Shirin Espiari Fereshteh Rashchi Sadrnezhaad S K | 2006 | Hydrometallurgy2006，82，： | 1 |
| 9 | Kinetic modeling of copper bioleaching from low-grade ore from the Shahrbabak Copper Complex显示文摘The copper recovery from low-grade copper sulfide ore was investigated using microbial leaching. Several parameters substantially affect the bioleaching of copper; among them, pulp density and nutrient media were selected for investigation. The optimum conditions for copper recovery were a pulp density of 5 g/mL, a mixed-mineral salt medium of Acidithiobacillus thiooxidans(70vol%) and Acidithiobacillus ferrooxidans(30vol%), and 10vol% of inoculum. Under these conditions, the maximum bioleaching capacity of the medium for copper recovery was determined to be approximately 99%. The effect of pulp density on the kinetics of the bioleaching process was surveyed using both da Silva's method and constrained multilinear regression analysis. The kinetics of copper dissolution followed the shrinking core model, and the process was diffusion controlled at a pulp density of 5 g/mL. Nevertheless, at higher pulp densities, the process was controlled by chemical reaction. | Saman Beikzadeh Noei Saeed Sheibani Fereshteh Rashchi Seyed Mohammad Javad Mirazimi | 2017 | International Journal of Minerals,Metallurgy and Materials2017，24，6： | 0 |
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