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| 1 | 硫化锌精矿直接浸出动力学及其半经验模型(英文)显示文摘在中试规模管式反应器中直接浸出贫铁硫化锌精矿,研究其浸出动力学。为满足静压浸出条件,将含硫酸亚铁和硫酸的矿浆注入到垂直放置的直径8 m的管式反应器中,空气从反应器的底部吹入。考察了初始硫酸浓度、反应温度、矿粒直径、初始硫酸锌浓度、矿浆浓度和铁含量对反应动力学的影响。结果表明,硫化锌精矿的直接浸出遵循收缩核模型,过程受化学反应控制,其表观活化能为49.7 k J/mol。采用半经验模型描述该过程,得到铁含量、硫酸浓度、硫化锌精矿浓度和矿粒直径的反应级数分别为0.982、0.189、-0.097和-0.992。采用SEM-EDS对硫化锌精矿浸出反应前后的矿粒进行分析,发现当锌的浸出率低于60%时,由于反应器搅拌的问题,颗粒表面硫产物层脱落,会影响浸出溶液与颗粒表面的接触。 | Nima SADEGHI Javad MOGHADDAM Mehdi OJAGHI ILKHCHI | 2017 | Transactions of Nonferrous Metals Society of China2017，27，10： | 4 |
| 2 | Green synthesis,characterization and physiological stability of gold nanoparticles from Stachys lavandulifolia Vahl extract显示文摘The synthesis of nontoxic stable gold nanoparticles is important for medical applications.An aqueous extract of the plant Stachys lavandulifolia Vahl was used to synthesize gold nanoparticles.This green method involved the S.lavandulifolia Vahl extract acting as a reducing and stabilizing agent.The nanoparticles were characterized by transmission electron microscopy,dynamic light scattering analysis and UV-vis absorption and Fourier transform-infrared spectroscopies.Stability under physiological conditions is important for medical applications.The stability of the nanoparticles was compared with that of conventional citrate-capped nanoparticles,under both synthetic and physiological conditions.The nanoparticles synthesized from the S.lavandulifolia Vahl extract were stable under physiological conditions,in contrast with conventional citrate-capped nanoparticles. | Pooriya Khademi-Azandehi Javad Moghaddam | 2015 | Particuology2015，13，2： | 3 |
| 3 | Statistical evaluation and optimization of zinc electrolyte hot purification process by Taguchi method显示文摘The neutral zinc sulfate solution obtained from hydrometallurgical process of Angouran zinc concentrate has cadmium, nickel and cobalt impurities, that must be purified before electrowinning. Therefore, cadmium and nickel are usually cemented out by addition of zinc dust and remained nickel and cobalt cemented out at second stage with zinc powder and arsenic trioxide. In this research, a new approach is described for determination of effective parameters and optimization of zinc electrolyte hot purification process using statistical design of experiments. The Taguchi method based on orthogonal array design(OAD) has been used to arrange the experimental runs. The experimental conditions involved in the work are as follows: the temperature range of 70-90 ℃ for reaction temperature(T), 30-90 min for reaction time(t), 2-4 g/L for zinc powder mass concentration(M), one to five series for zinc dust particle size distributions(S1-S5), and 0.1-0.5 g/L(C) for arsenic trioxide mass concentration. Optimum conditions for hot purification obtained in this work are T4(85 °C), t4=75 min, M4=3.5 g/L, S4(Serie 4), and C2=0.2 g/L. | Bahram Behnajady Javad Moghaddam | 2015 | Journal of Central South University2015，22，6： | 2 |
| 4 | Block-wise 2D kernel PCA/LDA for face recognition显示文摘 | Armin Eftekhari Mohamad Forouzanfar Hamid Abrishami Moghaddam Javad Alirezaie | 2010 | Information Processing Letters2010，110，17： | 1 |
| 5 | The Influence of Morphology on Photo-catalytic Activity and Optical Properties of Nanocrystalline ZnO Powder显示文摘ZnO nano-particles were synthesized via an ammonical ammonium carbonate solution by precipitation method in presence of some additives such as urea, oleic and stearic acid. The morphology and crystallinity of the obtained zinc oxide particles depend critically on the type of additive which was used. Additives also affected the crystal orientation of precipitate nano-particles. SEM, XRD, BET and UV-visible were used to characterize morphology, microstructure, specific surface area and optical properties of the products.Photo-catalysis properties of the as-prepared ZnO powders were evaluated by degradation of methyl red(acid red) in aqueous solution exposed to UV-light. Results suggested a close relationship among the morphology,size and surface area on photo-catalysis and optical properties of the particles. The widest Egvalue(3.56 e V),highest degradation and decolorization efficiency(99%) were obtained from a sample with the smallest grain size(largest surface area) which were used urea as an additive. | Javad Moghaddam Sara Mollaesmail Saeed Karimi | 2012 | Nano-Micro Letters2012，4，4： | 1 |
| 6 | 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 |
| 7 | Preparation of NiO nanoparticles from Ni(OH)_2·NiCO_3·4H_2O precursor by mechanical activation显示文摘A mechanical activation process was introduced as a facile method for producing nickel oxide nanopowders.The precursor compound Ni(OH)_2·NiCO_3·4H_2O was synthesized by chemical precipitation.The precursor was milled with NaCl diluent.A high-energy ball milling process led to decomposition of the precursor and subsequent dispersal in NaCl media.Nickel oxide nanocrystalline powders were produced by subsequent heat treatment and water washing.Milling rotation speed,milling time,ball-to-powder ratio(BPR),and nickel chloride-to-precursor ratio were introduced as influential parameters on the wavelength of maximum absorption(λ_(max)).The effects of these parameters were investigated by the Taguchi method.The optimum conditions for this study were a milling rotation speed of 150 r/min,a milling time of 20 h,a BPR of 15/1,and a NaCl-to-powder weight ratio(NPR) of 6/1.In these conditions,λ_(max) was predicted to be 292 nm.The structural properties of the samples were determined by field emission scanning electron microscopy,X-ray diffraction,and energy dispersive spectrometry. | Kolsoom Ahmadisoltansaraei Javad Moghaddam | 2014 | International Journal of Minerals,Metallurgy and Materials2014，21，7： | 0 |
| 8 | Effects of Eriobotrya japonica(Lindl.) flower extracts on mercuric chloride-induced hepatotoxicity in rats显示文摘Mercury(II) is an important factor in hepatotoxicity that can enter the body through marine diets and amalgams.In the present study,the protective effect of the Eriobotrya japonica flower extract(EJFE) on HgCl 2-induced hepatotoxicity was investigated.Five mg/kg of mercuric chloride in drinking water was given to rats either with saline or EJFE(100 and 200 mg/kg as intraperitoneal(IP)) for 30 d.The mercury levels in different groups of liver tissues of the rats were measured with flameless atomic absorption spectroscopy(F-AAS).Also,mercury accumulation in the liver of the rats was modeled by using a parallel chemical kinetic model.The results showed that HgCl 2-induced oxidative damage led to a significant decrease in glutathione(GSH) and the total antioxidant capacity(TAC) levels,and to a significant increase in lipid peroxidation level.Accumulated mercury was 14.47% more in the livers of the stress groups than in those of the control groups(P<0.001),whereas the amount of Hg was adjusted to 13.49% and 13.93% in groups treated with 100 and 200 mg/kg of EJFE respectively,as compared with stress groups(P<0.001).HPLC analysis of EJFE revealed that hesperetin and gallic acid are the major antioxidants in EJFE.Results demonstrate that flowers of the Eriobotrya japonica cause a significant protection against HgCl 2 induced hepatotoxicity in all diagnostic parameters by strengthening the antioxidant defense mechanisms and they may have a therapeutic function in free radical mediated diseases. | ESMAEILI Amir Hossein KHAVARI-NEJAD Ramazan Ali HAJIZADEH MOGHADDAM Akbar CHAICHI Mohammad Javad EBRAHIMZADEH Mohammad Ali | 2012 | Chinese Science Bulletin2012，57，30： | 0 |
| 9 | Stochastic Security-constrained Unit Commitment Considering Electric Vehicles, Energy Storage Systems, and Flexible Loads with Renewable Energy Resources显示文摘In this paper, a new formulation for modeling the problem of stochastic security-constrained unit commitment along with optimal charging and discharging of large-scale electric vehicles, energy storage systems, and flexible loads with renewable energy resources is presented. The uncertainty of renewable energy resources is considered as a scenario-based model. In this paper, a multi-objective function which considers the reduction of operation cost, no-load and startup/shutdown costs, unserved load cost, load shifting, carbon emission, optimal charging and discharging of energy storage systems, and power curtailment of renewable energy resources is considered. The proposed formulation is a mixed-integer linear programming(MILP) model, of which the optimal global solution is guaranteed by commercial solvers. To validate the proposed formulation, several cases and networks are considered for analysis, and the results demonstrate the efficiency. | Ali Gholami Trojani Mahmoud Samiei Moghaddam Javad Mohamadi Baigi | 2023 | Journal of Modern Power Systems and Clean Energy2023，11，5： | 0 |
| 10 | 通过螯合镍提高从Zn-Ni硫酸盐溶液中水解沉淀锌的选择性(英文)显示文摘研究锌/镍摩尔比为20:1的锌-镍硫酸盐溶液中锌的选择性沉淀过程。将0.5 mol/L NaOH溶液滴加到含0、0.01、0.02、0.03和0.04mol/L乙二胺四乙酸盐(EDTA)作为螯合剂的锌-镍硫酸盐溶液中。利用Visual MINTEQ软件进行沉淀途径的平衡分析。平衡分析结果表明,少量EDTA的存在可以防止镍在碱性条件下沉淀,而对锌的沉淀没有任何不利影响。鉴于此,溶液中仅存在0.03 mol/L EDTA、pH=9.0时,锌的沉淀率超过90%,沉淀产物中Zn含量约为50%,而Ni含量仅为0.11%。为了更完全地分离锌和镍,沉淀后继续搅拌120min。沉淀产物的X射线衍射分析表明,沉淀相为Zn_4(OH)_6SO_4·4H_2O。 | Mostafa Aghazadeh-Ghomi Javad Moghaddam Naghi Parvini Ahmadi | 2018 | Transactions of Nonferrous Metals Society of China2018，28，12： | 0 |
| 11 | Simple separation method of Zn(Ⅱ) and Cd(Ⅱ) from brine solution of zinc plant residue and synthetic chloride media using solvent extraction显示文摘In this work,the possibility of separation of Zn^2+and Cd^2+metal ions from chloride(brine)solutions was examined.For this purpose,simple solvent extraction(SX)experiments by di-2-ethylhexyl phosphoric acid(D2EHPA)in kerosene as a diluent was performed on synthetic and industrial chloride solution obtained from brine leaching of zinc filter cakes(by-product of zinc hydrometallurgical processing).The optimal conditions for separation were determined.The zinc extraction efficiency was 99%with negligible co-extraction of cadmium.Therefore,a highΔpH0.5 value for Zn(Ⅱ)and Cd(Ⅱ)was achieved.FT-IR and slope analysis indicated that ZnClA·3HA and CdClA·3HA species were probably extracted. | Ali Asghar Balesini Aghdam Hossein Yoozbashizadeh Javad Moghaddam | 2020 | Chinese Journal of Chemical Engineering2020，28，4： | 0 |
| 12 | A new approach to zinc–nickel separation using solution alkalinization method:application to a zinc plant residue显示文摘The present investigation involves the separation of zinc and nickel from a sulfate solution using the acidic leaching of zinc plant residue after cadmium removal step as precursor(42.88 wt%Zn,8.50 wt%Cd and 2.33 wt%Ni).Separation of nickel from the solution was done by pouring it into a strong alkaline sodium hydroxide solution due to precipitation of nickel hydroxide and conversion of zinc to the soluble Zn(OH)_(4)^(2-)complex.Higher degrees of separation were reached by pouring more diluted solutions into the stronger alkaline media.To clear pursue of the process,design of experimental methodology was applied for experiments.Scrutinizing different washing steps on nickel-rich precipitates shows that the washing process decreases zinc content and thereby increases overall selectivity coefficient.Outcomes show that,at the optimized condition,Ni/Zn weight ratio in the solid product becomes about 104 times higher than the initial ratio in the initial feed solution and a nickel concentrate with 29.98 wt%Ni and 5.99 wt%Zn is achieved.At the same time,the chemical analysis of filtrate shows only 4.4 mg·L^(-1)Ni in the alkaline zinc solution,which means that over 99%nickel is recovered.The study on changes of zinc concentration with time shows that the process could be completed only after few minutes. | Mostafa Aghazadeh Ghomi Javad Moghaddam Naghi Parvini Ahmadi | 2020 | Rare Metals2020，39，11： | 0 |
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