Study on Microbes and Their Effects on Rare Earth Extraction in Weathering Crust of Granite

Ｔｈｅａｃｔｉｖｉｔｉｅｓｏｆｍｉｃｒｏｂｅｓａｒｅｃｏｎｓｉｄｅｒｅｄａｓｏｎｅｏｆｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔｆａｃｔｏｒｓａｆｆｅｃｔｉｎｇｏｎｔｈｅｗｅａｔｈｅｒｉｎｇｏｆｒｏｃｋｓａｎｄｍｉｎｅｒａｌｓｉｎｔｈｅｂｉｏｓｐｈｅｒｅ .Ｓｏｍｅｍｉｃｒｏｂｅｓｅｘｃｒｅｔｅｃｈｅｍｉｃａｌａ ｇｅｎｔｓｔｈａｔｃｏｒｒｏｄｅｔｈｅｒｏｃｋａｎｄｌｅａｄｔｏｍｉｎｅｒａｌｂｒｅａｋｄｏｗｎｏｒｄｉｓｓｏｌｕｔｉｏｎ .Ｔｈｅｓｅｃｈｅｍｉｃａｌａ ｇｅｎｔｓｍａｙｉｎｃｌｕｄｅｔｈｅｉｎｏｒ…     

Determining Foundry Area of Bronze Vessel Using REE in Clay Mould Residues

The composition of casting clay core might provide clue to the foundry area of the bronze vessels. REE analysis of the residual clay mould was conducted by inductively coupled plasma atomic emission spectrometer （ICP-AES）. Results reveal that characteristic of REE of clay mould from different region is dissimilar. It is feasible to restrict the possible foundry area of the bronze vessels on the basis of analysis of REE of clay mould residues on the bronzes. Meanwhile, this paper attempts to determine the foundry area of the bronze vessels unearthed at Jiuliandun tombs of Chu State, dated back to Warring States Period, in Zaoyang City, Hubei Province, and at Zuozhong cemetery, Spring and Autumn Period, in Jingmen City, Hubei Province. REE of clay core provides information on the foundry area of bronze vessels.     

REE Contents in Topsoil on the Loess Plateau and Effects of REE Applying on Crops

ＲＥＥＣｏｎｔｅｎｔｓｉｎＴｏｐｓｏｉｌｏｎｔｈｅＬｏｅｓｓＰｌａｔｅａｕａｎｄＥｆｆｅｃｔｓｏｆＲＥＥＡｐｐｌｙｉｎｇｏｎＣｒｏｐｓ￥ＬｉｕＰｕｌｉｎｇ（刘普灵），ＴｉａｎＪｕｎｌｉａｎｇ（田均良），ＬｉＹａｑｉ（李雅奇）．ＪｕＴｏｎｇｊｕｎ（琚彤...     

Accumulation of Rare Earth Elements in Spinach and Soil under Condition of Using REE and Acid Rain Stress

Ｔｈｅｒｅａｒｅｍａｎｙｒｅｐｏｒｔｓｏｆｓｔｕｄｉｅｓｏｎｔｈｅｅｆｆｅｃｔｓｏｎｐｌａｎｔｓｂｙａｃｉｄｒａｉｎ[1～ 3 ] ａｎｄｕｔｉｌｉｚａ ｔｉｏｎｏｆＲＥＥ[4～ 7] ａｎｄａｆｅｗｓｔｕｄｉｅｓｏｎＲＥＥｕｓ ｉｎｇａｓｃｈｅｍｉｃａｌａｄｊｕｓｔｍｅｎｔｔｏｐｒｏｔｅｃｔｉｎｇｐｌａｎｔｓｆｒｏｍｂｅｉｎｇｄａｍａｇｅｄｂｙａｃｉｄｒａｉｎｓｔｒｅｓｓｕｎｄｅｒｎａｔｕｒａｌｃｏｎｄｉｔｉｏｎ .ＴｈｉｓｓｔｕｄｙｗａｓｆｏｃｕｓｅｄｏｎｔｈｅａｃｃｕｍｕｌａｔｉｏｎｏｆＲＥＥｉｎｓｐｉｎ…     

Variation of REE in Process of Smelting of Copper Ores in the Ancient Times

Variation of REE in the process of smelting of copper ores and their potential application in archaco-metallurgy were investigated. All samples of copper ores, slag and copper ingots are from the ancient sites of mining and smelting, which include Tonglushan site in Hubei province, Zhaobishan site in Ningxia municipality, Zhongtiaoshan site in Shanxi province and Dajing site in Inner Mongolia municipality autonomous region. REE analysis was conducted by Inductively Coupled Plasma Atomic Emission Spectrometer (ICP-AES). The result of this study reveals that REE are concentrated in slag mainly during the smelting process, and total content of REE in the copper ingots is very low. With low total content of REE in the copper ingots, it is almost impossible to find out provenance of the ancient bronze wares through REE.Nevertheless, this research finds that REE distribution pattern of the slag is possible to be used to ascertain smelting technology of the copper ores adopted by the ancient smelters and export route of the ancient copperores.     

Enrichment and Release of Rare Earth Elements during Weathering of Sedimentary Rocks in Wujiang Catchments

Thirteen weathering profiles of sedimentary rocks such as limestone, dolomitic limestone, dolomite, silicalite, black shale and purple sandrock from Wujiang catchments were selected for study on enrichment and release behavior of rare earth elements （REE） during weathering, and in its impact on plant growth and riverine REE distribution in the catchments with methods of hierachical cluster analysis and mass balance calculation in order to set a basis for riverine material source research and agricultural production. The results show that the enrichment degree of REE in calcareous soils from the Wujiang catchments is much higher than that of limestone, yellow soil, upper continental crust （UCC）,     

Processing of the Silver–Zinc Crust of the Product of Refining of Raw Lead in a Copper-Smelting Converter

Metallurgist - We present the results of industrial testing of the technology of processing of silver–zinc crust obtained in the process of refining of raw lead from silver in a...     

Transportation of REE in the Ductile Shear Zone in Hetai Gold Deposit,Guangdong Province

The REE transportation in two sorts of mylonites of ductile shear zone, in Hetai gold deposit, Guangdong province was studied. The results show that there is REE compositional variation regularly in the ductile shear zone. When mica-quartz schist and migmatite are changing into mylonites or ultramylonites, i.e., along with intensifying deformation,the contents of each rare earth element and the total contents of the LREE, HREE and REE increase or decrease regularly, but the REE patterns of the rock are accordant. The isocon diagram of the tectonic rocks before and after deformation shows that the REE compositional variation of the mylonites or ultramylonites are very small, but there is a few REE moving in or out in the rock deformation. The reason of the REE compositional variation is that there are volume change and fluid flow in the rock deformation, and it leads to the LREE relative enrichment and HREE relative loss.     

江西大吉山花岗岩风化壳稀土矿床稀土元素地球化学

本文系统采集分析了江西大吉山花岗岩体及其风化壳样品，通过研究其不同类型花岗岩风化壳的矿物组成、稀土元素组成和稀土元素的分配，得出了风化壳中稀土元素的分布特征和规律，讨论了风化作用过程中稀土元素的迁移机制。     

几种有机酸对花岗岩风化壳中稀土元素的浸出作用的实验研究

几种有机酸对广东共和花岗岩风化壳样品中稀土元素的浸泡实验结果表明 :1稀土的浸出量随酸浓度的增加而明显升高 ;2低浓度的有机酸对稀土的浸出量随着水岩比的增加而增加 ;3有机酸与风化壳样品的作用结果导致介质的 p H值会发生变化 ,大多数是 p H值升高 ;稀土的浸出量随着 p H降低有升高的趋势 ;4与硫酸铵所浸出的稀土相比 ,有机酸对风化壳稀土的浸出结果是 Ce负异常减弱 ,Eu负异常增加 ,(L a/ Sm) N 和 (Gd/ Yb) N比值相对减少 ,即有机酸对风化壳稀土分异作用作出了贡献。     

腐植酸与镓、铟的吸附模型

对腐植酸与镓，铟的吸附作用作了实验研究，提出了拟合实验数据的理想吸附等温方程，并对作用机理予以推断。     

北秦岭天水地区地壳造山的花岗岩记录及构造岩浆作用

本文利用天水地区花岗岩类同位素年龄,结合岩石地球化学特征,将该区花岗岩类划分为三类不同成因类型.即加里东期岩浆弧花岗岩、华力西早期同碰撞花岗岩及造山期后A型花岗岩,它们分别形成于不同的构造环境.在此基础上,初步探讨了秦-祁结合部北秦岭造山带的形成与演化,北秦岭造山带大致经历了加里东末期的俯冲造山作用和华力西早期的碰撞造...     

风化壳淋积型稀土矿开采及分离技术的现状与发展

在查阅大量文献资料的基础上,阐述了风化壳淋积型稀土矿处理技术的现状,分析了目前风化壳淋积型稀土矿各种提取技术的主要特点;针对目前提取工艺中存在的一些问题,在原地溶浸的基础理论研究、新型沉淀剂的研发及除杂提纯技术等方面提出了下一步的发展方向.     

风化壳淋积型稀土矿提取除杂技术现状及进展

在查阅大量文献资料的基础上,阐述了风化壳淋积型稀土矿除杂技术的研究现状,分析了目前风化壳淋积型稀土矿各种除杂技术的主要特点;提出了目前除杂技术中存在的一些问题;在风化壳淋积型稀土矿提取除杂技术的理论研究、开发新型的高效抑杂剂、优化工艺流程和运用采选冶联合流程等方面提出了今后的主要研究方向.     

用LIX84从富钴结壳硫酸浸出液中选择性萃取铜

采用LIX84作萃取剂、硫酸作反萃剂 ,从大洋富钴结壳常温常压活化硫酸浸出除铁后液中萃取铜。试验考察了相比、平衡水相pH值、时间等因素对LIX84萃铜的影响。结果表明 ,相比、平衡水相 pH值、混合时间都对铜的萃取率有一定影响。最后优化出的萃取工艺条件为 (体积百分数 )有机相 12 %LIX84+ 88%煤油 ,室温 ,相比 (O/A)=1/ 2 0 ,出口水相pH2 60± 0 0 5 ,萃取级数为 2级 ,每级混合时间 5min。经过 2级萃取、1级洗涤、3级反萃后 ,可以得到完全符合电解沉积要求的硫酸铜溶液 ,从而使浸出液中的铜与其它金属彻底分离     

Modelling of Distribution Pattern of Rare Earth Elements in Grey Gneisses and Their Petrogenesis of Dabie Complex

The grey gneisses are composed of early-stage layered TTG and late-stage diapiric tonalite in-trusions.The Dabie complex,northeastern Hubei Province,may be distinguished into supracrustal sequenceand grey gneisses.Different distribution patterns of rare earth elements in the early- and late- stage gneisses,i.e.the early-stage gneisses are enriched in LREE and remarkably depleted in HREE;and late-stage isslightly enriched in LREE and unevidently depleted in HREE.Geological evidence and characteristics of el-ement ratio diagrams suggest that the TTG is mainly controlled by portional partial melting and accompa-nied with fractional crystallization.The quantitative modelling of REE pattern indicates that TTG is formedfrom amphibolite transformed from basic rocks with 25%～65% of portional partial melt while thelate-stage tonalite intrusion was also accompanied with fractional crystalization of 22% biotites.