W-305C树脂吸附铌的性能及动力学研究

研究了W 305C离子交换树脂从草酸溶液中吸附铌草酸配合物的性能。试验结果表明,在[(NH4)C2O4]=0 20mol/L,[K2S2O7]=0 030mol/L,[Nb]=8 0×10-5mol/L,pH=2 0条件下,铌的吸附率有最大值,测得Freundish常数K=3 50×103,吸附率常数k25℃=1 70×10-4s-1,吸附活化能Ea=24 94kJ/mol,铌的饱和容量为每g干树脂143 2mg。     

W-305C树指吸附钽的性能及动力学研究

研究了 W 3 0 5 C树脂从草酸溶液中吸附钽草酸配合物的性能。结果表明 ,在 [(NH4) C2 O4]=0 .1 5 mol/L,[K2 S2 O7]=0 .0 2 8mol/ L,[Ta]=8.0× 1 0 -5mol/ L,p H=2 .0条件下 ,钽的吸附率有最大值 ,Freundlish常数k=3 .48× 1 0 3 ,吸附常数 K2 98=1 .72× 1 0 -4,吸附活化能 Ea=2 5 .70 k J/ mol,树脂对钽的饱和容量为每克干树脂 1 5 3 .5 2 mg。     

707阴离子交换树脂吸附钽的性能及动力学研究

本文研究了707阴离子交换树脂从草酸溶液中吸附钽草酸配合物的性能和动力学。试验结果表明在[（NH4）2C2O4]=0．13mol／L、[K2S2O8]=0．024mol／L、[Ta]=8×10－5mol／L、pH=1．5～3．5条件下，钽的吸附率有最大值。测得液膜扩散控制交换速率常数B25℃=2．5×10－4s－1，液膜扩散控制交换活化能Ea=15．96kJ／mol，钽的饱和吸附容量CTa=182．4mg／g干树脂。     

伯氨树脂对稀土矿酸浸出液中钍的吸附研究

合成了一种伯胺树脂,对钍具有很好的选择性,当钍浓度为125mg/L时,吸附钍的分配比达到2.48×103。与铁和铈的分离系数分别为1.29×104和9.7×104,吸附钍的最佳[SO42-]=1.0mol/L,[H+]=0.1mol/L,接触时间5min。对钍的去除率大于99%,处理液中钍浓度<0.001mg/L。     

草酸-次甲基蓝极谱法测定有色金属矿石中微量锡

本文采用在硫酸介质中 ,用草酸沉淀分离锌、铜等多种重金属离子 ,二氯化钡分离铅以消除铅的影响。锡在草酸 -硫酸介质中呈草酸锡络合物状态 ,不易水解 ,不被吸附。络合物既可产生阴极波也可产生阳极波。体系中引入次甲基蓝后形成三元离子缔合物产生络合物吸附波 ,灵敏度增加 ,在 0 72mol/LH2 SO4- 0 2 5mol/L草酸 - 5 34×1 0 - 5mol/L次甲基蓝介质中其锡的峰电位为- 0 4V。采用阴极化Ip” ,E0 =- 0 0 8V ,在5 0mL溶液中Sn质量 0 5～ 1 0 0 μg成线性关系 ;用阳极化Ip″,E0 =- 0 2V ,在 5 0mL溶液中Sn质量 5～ 40 0 μg线性关…     

IPN弱碱树脂吸附铼的行为及热力学性质

本文研究了IPN弱碱树脂从弱碱性介质中吸附铼的行为和热力学性质。实验结果表明,在PH=9.0—10.0范围内,该树脂能有效地吸附铼,而钼仅有少量被吸附,铼钼分离系数高达1506;树脂对铼的静态平衡交换容量和动态操作容量分别为804、805.3mg/g树脂;被吸附的铼用8％HN_3·H_2O+10％NH_4NO_3混合液淋洗,淋洗率为99.32％。树脂以阴离子交换机理吸附ReO_4~-。测定并求算了吸附过程的热力学函数。其值分别为ΔH~0=-9.62kJ/mol,ΔG~0=-10.00kJ/mol,ΔS~0=1.3J/mol·K。     

用强碱性阴离子交换树脂回收氰化物的研究

文中针对D2 - 1树脂和 2 0 1× 7树脂对氰化物的吸附和解吸性能进行了对比研究。研究主要集中在两种树脂的最佳吸附条件、饱和吸附量和吸附的热力学及动力学规律上 ,确定了两种树脂的最佳吸附条件均为 :pH值控制在 10～ 11之间 ,室温 ,静态吸附振荡 15min ;D2 - 1树脂和 2 0 1× 7树脂的静态饱和吸附量分别为 :15 .4 9mg/ml湿树脂 ,2 5 .39mg/ml湿树脂 ;吸附和解吸的速率常数 :D2 - 1树脂为 1.0 4× 10 - 2 s- 1和 1.4 8× 10 - 2 s- 1,2 0 1× 7树脂为 1.0 4× 10 - 2 s- 1和 2 .12× 10 - 2 s- 1,且吸附过程符合Freundlish经验等温式。同时 ,在研究解吸的过程中选择中性NaCl作为解吸剂 ,取得了良好的解吸效果。实验结果表明 ,2 0 1× 7树脂对氰化物的吸附性能优于D2 - 1树脂 ,在处理、回收提金废水中的氰化物方面更具有工业应用的前景。     

铋—檞皮素极谱络合吸附波测定锰盐中的痕量铋

在0.015至0.02mol/L H_2SO_4底液中,可获得灵敏的铋(Ⅲ)—檞皮素的络合吸附波.铋浓度由1.0×10~(-8)至6.0×10~(-6)mol/L与其二阶导数波有正比关系,检出限为5.0×10~(-9)mol/L.用其测定了试剂锰盐中10~(-4)的铋.测得电活性络合物组成为铋(Ⅲ):檞皮素=1:2,条件形成常数β=5.5×10~(-9).     

N235萃淋树脂吸附盐酸的热力学和动力学

采用静态吸附法研究了N235萃淋树脂吸附HCl的热力学、动力学,探讨了吸附规律。结果表明:N235萃淋树脂对HCl的吸附同时遵循朗缪尔(Langmuir)和弗兰德里希(Freundlich)吸附等温模型,但前者契合程度更好;在温度323K、HCl浓度74.13 mmol/L条件下,N235萃淋树脂对HCl的最大吸附量为0.367 2mmol/g;热力学计算结果表明,ΔH=18.066kJ/mol,ΔS=65.1J/(mol·K),ΔG303K=-1.659kJ/mol,ΔG308K=-1.985kJ/mol,ΔG313K=-2.31kJ/mol,ΔG318K=-2.636kJ/mol,可以认为,吸附过程是吸热(ΔH0)、熵增(ΔS0)、可自发进行的物理吸附(ΔG∈-20~0kJ/mol);吸附动力学研究表明,吸附过程与准二级动力学方程契合得更好(相关系数R20.99),吸附速率受液膜扩散控制。     

铈Ⅳ-3,4-二羟基苯甲酸-吐温40化学发光体系的研究及其应用

基于在表面活性剂吐温 40存在条件下 ,3 ,4 二羟基苯甲酸与铈 在酸性介质中发生化学发光反应 ,建立了测定微量 3 ,4 二羟基苯甲酸的化学发光分析法。该法测定 3 ,4 二羟基苯甲酸的线性范围为 8.0× 10 - 7～ 1 .0× 10 - 4mol/L ,检出限为 5 .0× 10 - 7mol/L ,相对标准偏差为 3.0 % ( 8 0× 10 - 6 mol/L 3 ,4 二羟基苯甲酸 ,n =11)。该法应用于测定淠河水中加入的 3 ,4 二羟基苯甲酸 ,结果令人满意     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources