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| 1 | Enhancing the leaching effect of an ion-absorbed rare earth ore by ameliorating the seepage effect with sodium dodecyl sulfate surfactant显示文摘Ameliorating the problem of low leaching efficiency,long leaching period,and high agent consumption should be studied to efficiently exploit ion-absorbed rare earth ore resources.In this study,the surfactant sodium dodecyl sulfate(SDS) is used to enhance the leaching effect of an ion-absorbed rare earth ore by ameliorating the seepage effect for the first time.The effects of surfactant concentration,leaching agent dosage,solution flow velocity,and solution pH on the leaching rate were explored,and the mechanism of SDS was discussed.Under the optimum conditions,the addition of a small amount of SDS(mass fraction0.04%) can increase the leaching rate by about 5%,shorten the leaching period,and reduce the consumption of the leaching agent.SDS significantly ameliorates the seepage effect of the ore body by reducing the surface tension of the leaching agent and ameliorating the wettability of the mineral surface.This effect is the main factor that improves the leaching efficiency.DFT(density functional theory) calculation results show that SDS can react with rare earth ions,which reduces the adsorption strength on clay mineral surfaces.Hence,rare earth ions are easily exchanged by ammonium ions,and mass transfer is enhanced. | Yongbing Zhang Boyuan Zhang Siqi Yang Zhigang Zhong Hepeng Zhou Xianping Luo | 2021 | International Journal of Mining Science and Technology2021，31，6： | 8 |
| 2 | Bi2WO6 doped with rare earth ions:Preparation,characterization and photocatalytic activity under simulated solar irradiation显示文摘Rare-earth modification Bi2WO6 composites(RE/Bi2WO6)were studied by experimental performance and theory computation based on the different 4 f orbits of selected rare earth elements(La,Ce,Gd,and Yb).The prepared RE/Bi2WO6 was characterized by XRD,SEM/TEM,XPS,UV-vis DRS,and N2 adsorption to learn their physical-chemical properties.Azo dye Rhodamine B(RhB)was photodegraded as a target pollutant to investigate the photocatalytic activity of prepared RE/Bi2WO6 composites.The results of experiment and computation show that four rare earth elements with different electron configurations retain the phase and morphology of Bi2 WO6 and enhance the removal efficiency of RhB under simulated solar irradiation.The optimum doping contents are 0.01%,0.05%,0.05%and 0.01%for La-,Ce-,Gd-,and Yb-doped Bi2WO6,respectively.However,light rare earth La and Ce doped composites indicate some difference in visible light adso rption capacity and mineralization on RhB co mpared with heavy rare earth Gd and Yb doped composites.Both La/Bi2WO6 and Ce/Bi2 WO6 possess larger pore size and higher mineralization ability than Gd/Bi2 WO6 and Yb/Bi2WO6 under the same experimental conditions while Gd/Bi2WO6 and Yb/Bi2WO6 show stronger red shift to the visible light due to the more 4 f electrons.The hole oxidation plays a major role in the photodegradation of RhB by all RE/Bi2WO6. | Chunying Wang Chuantao Gu Ting Zeng Qingqing Zhang Xianping Luo | 2021 | Journal of Rare Earths2021，39，1： | 6 |
| 3 | Exogenous rare earth element-yttrium deteriorated soil microbial community structure显示文摘In this study, we selected yttrium as the representative of REEs to investigate the impacts of exogenous yttrium on soil physicochemical properties and microbiota. The results showed that exogenous yttrium has no significant effect on soil physical properties but a significantly negative impact on soil chemical properties. The results of high-throughput sequencing demonstrate that exogenous yttrium significantly decreases the number of OTUs, ACE, Chao 1, and Shannon indices while increases the Simpson index(P < 0.05), indicating the low soil microbial diversity. The relative abundances of soil microbes are significantly changed at phylum and genus level. Principal component analysis(PCA) showed the significant difference of microbial community between yttrium treatments(YCl_3-250 and YCl_3-500) and non-yttrium treatment(CK) and the similarity of that between YCl_3-250 and YCI_3-500. Proteobacteria and Bacteroidetes are found to be the most tolerant phyla to exogenous yttrium while Verrucomicrobia the most sensitive phylum. Redundancy analysis(RDA) results suggest that exogenous yttrium affects soil microbiota only through changing the soil chemical properties but not soil physical properties, and C/N ratio is the key environmental factor. | Caigui Luo Yangwu Deng Jian Liang Sipin Zhu Zhenya Wei Xiaobin Guo Xianping Luo | 2018 | Journal of Rare Earths2018，36，4： | 5 |
| 4 | Pore structure characterization and seepage analysis of ionic rare earth orebodies based on computed tomography images显示文摘Pore network structure of ore body is a diffusion channel of leaching agent solution that exerts a significant influence on seepage.The ore body structure,pore distribution,pore and throat size,and pore network characteristics of topsoil,weathered,and semiweathered layers of ionic rare earth ore in southern Jiangxi Province were explored in this study.The effect of leaching operation on the pore structure was investigated,and main factors affecting the seepage were analyzed.Results showed that the semiweathered layer presents a dense structure and a small number of unconnected pores.Pores of topsoil and weathered layers are mainly long and narrow column openings with some planar fractures.Even pore distribution and large size span were observed.Compared with the weathered layer,the topsoil layer demonstrates larger voids,smaller average pore volume and equivalent radius,and fewer coordination throats;however,the average equivalent radius of the throat in the topsoil layer is larger and largescale channels exist through ore body vertically.Hence,permeability of the topsoil layer is significantly higher than that of the weathered layer.Colloidal clay minerals migrate easily and the occurrence of silting in the small porosity blocks the throat and significantly decreases the permeability of the ore body in the leaching process.The equivalent radius of the throat is the key to the seepage.Reducing the migration of fine particles is an effective measure to protect the throat and shorten the leaching period. | Xianping Luo Yongbing Zhang Hepeng Zhou Kunzhong He Boyuan Zhang Dongming Zhang Weijing Xiao | 2022 | International Journal of Mining Science and Technology2022，32，2： | 5 |
| 5 | A review of intelligent ore sorting technology and equipment development显示文摘Under the background of increasingly scarce ore worldwide and increasingly fierce market competition,developing the mining industry could be strongly restricted.Intelligent ore sorting equipment not only improves ore use and enhances the economic benefits of enterprises but also increases the ore grade and lessens the grinding cost and tailings production.However,long-term research on intelligent ore sorting equipment found that the factors affecting sorting efficiency mainly include ore information identification technology,equipment sorting actuator,and information processing algorithm.The high precision,strong anti-interference capability,and high speed of these factors guarantee the separation efficiency of intelligent ore sorting equipment.Color ore sorter,X-ray ore transmission sorter,dual-energy X-ray transmission ore sorter,X-ray fluorescence ore sorter,and near-infrared ore sorter have been successfully developed in accordance with the different characteristics of minerals while ensuring the accuracy of equipment sorting and improving the equipment sorting efficiency.With the continuous improvement of mine automation level,the application of online element rapid analysis technology with high speed,high precision,and strong anti-interference capability in intelligent ore sorting equipment will become an inevitable trend of equipment development in the future.Laser-induced breakdown spectroscopy,transientγneutron activation analysis,online Fourier transform infrared spectroscopy,and nuclear magnetic resonance techniques will promote the development of ore sorting equipment.In addition,the improvement and joint application of additional high-speed and high-precision operation algorithms(such as peak area,principal component analysis,artificial neural network,partial least squares,and Monte Carlo library least squares methods)are an essential part of the development of intelligent ore sorting equipment in the future. | Xianping Luo Kunzhong He Yan Zhang Pengyu He Yongbing Zhang | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，9： | 4 |
| 6 | Insights into the floatability between spodumene and albite from crystal chemistry standpoint显示文摘Spodumene is a silicate mineral rich in lithium.However,the gangue mineral,albite has similar crystal chemical structure and composition to spodumene.In this work,the density functional theory(DFT)calculation was taken to research the floatability from the perspective of crystal chemistry.And contact angle test and reagent adsorption test were used to support the simulation results.In addition,the weighted total density of broken bonds is proposed for the first time to judge the generation probability of cleavage surface.The DFT calculation results display that the Na and Al sites on the albite surface are the adsorption sites of water molecules.While the water molecules only bond with Al atom on the surface of spodumene and each Al site can adsorb only one water molecule.Thus,the wetting effect of water molecules on the albite surface is stronger than that of spodumene.This is consistent with the result of contact angle.In sodium oleate system,the oleic acid anion is adsorbed on the spodumene surface in form of a multicomponent ring while the albite is a single ring.Theoretically,oleic acid anion can be strongly adsorbed on the surface of spodumene and albite under vacuum.The adsorption strength of spodumene is higher than that of albite.However,on hydrated surface,the adsorption strength of oleic acid anion on mineral surface is greatly reduced due to the interaction between water molecules and metal site on mineral surface.Thus,spodumene and albite are hard to float without external activated ions in sodium oleate system. | Hepeng Zhou Fanxin Xie Yongbing Zhang Boyuan Zhang Siqi Yang Xianping Luo | 2022 | International Journal of Mining Science and Technology2022，32，6： | 1 |
| 7 | Enhanced leaching process of a low-grade weathered crust elution-deposited rare earth ore with carboxymethyl sesbania gum显示文摘 | Jun Tian Jingqun Yin Xuekun Tang Ji Chen Xianping Luo Guohua Rao | 2013 | Hydrometallurgy2013，，： | 1 |
| 8 | Reduction and luminescence of europium ions in glass ceramics containing SrF 2 nanocrystals显示文摘 | Qun Luo Xvsheng Qiao Xianping Fan Shiqi Liu Hui Yang Xianghua Zhang | 2008 | Journal of Non-Crystalline Solids2008，，40： | 1 |
| 9 | Process optimization on leaching of a lean weathered crust elution-deposited rare earth ores显示文摘 | Jun Tian Xuekun Tang Jingqun Yin Xianping Luo Guohua Rao Mintao Jiang | 2013 | International Journal of Mineral Processing2013，，： | 1 |
| 10 | Free-Space Quantum Key Distribution with Rb Vapor Filters 显示文摘 | SHAN Xin SUN Xianping LUO Jun | 2006 | Appl Phys Lett2006，89，19： | 1 |
| 11 | NaGdF 4 :Ce 3+ and (Ce,Gd)F 3 nanoparticles: Hydrothermal synthesis and luminescence properties显示文摘 | Xiaoqing Zhang Xianping Fan Xvsheng Qiao Qun Luo | 2010 | Materials Chemistry and Physics2010，，1： | 1 |
| 12 | Elimination of the adverse effect of cement filling on the flotation of a nickel ore显示文摘 | FENG Bo LUO Xianping XU Jing | 2014 | Minerals Engineering2014，69，12： | 1 |
| 13 | Tunable white light emission from glass-ceramics containing Eu 2+ , Tb 3+ , Eu 3+ co-doped SrLaF 5 nanocrystals显示文摘 | Hengyi Fu Xvsheng Qiao Shuo Cui Qun Luo Jiangyun Qian Xianping Fan Xianghua Zhang | 2011 | Materials Letters2011，，： | 1 |
| 14 | ZnO Films on Transferable and Low Thermal Resistance Graphite Substrate Grown by Ultrasonic Spray Pyrolysis显示文摘ZnO thin films were deposited on graphite substrates by ultrasonic spray pyrolysis method with Zn(CH 3 COO) 2 ·2H 2 O aqueous solution as precursor. The crystalline structure, morphology, and optical properties of the as-grown ZnO films were investigated systematically as a function of deposition temperature and growth time. Near-band edge ultraviolet(UV) emission was observed in room temperature photoluminescence spectra for the optimized samples, yet the usually observed defect related deep level emissions were nearly undetectable, indicating that high optical quality ZnO thin fi lms could be achieved via this ultrasonic spray pyrolysis method. Considering the features of transferable and low thermal resistance of the graphite substrates, the achievement will be of special interest for the development of high-power semiconductor devices with suffi cient power durability. | 边继明 MA Xiaowen SUN Jingchang ZHANG Zhikun WANG Yuxin QIN Fuwen LUO Yingmin ZHANG Yuzhi FU Xianping | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，3： | 0 |
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