铕在亚胺基二乙酸树脂上的吸附行为及其机理

亚氨基二乙酸树脂 (D4 0 1)对铕 ( )的吸附在 HAc- Na Ac缓冲溶液 p H=5 .73时最佳 ,2 5℃时静态饱和吸附容量为 182 m g/g;用 2 .0 m ol· L- 1 HCl作解析剂解吸率为 10 0 % ;等温吸附服从 Freundlich经验式 ;表观速率常数 k2 98=2 .5 4× 10 - 5s- 1 ;吸附的热焓为△ H°=76 .6 k J· mol- 1 ;树脂功能基与铕 ( )的摩尔比为 3∶ 1;用化学法和红外光谱等探讨了吸附机理。     

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。     

D155树脂对铒(Ⅲ)的吸附行为研究

用树脂吸附的方法系统地研究了树脂D155对铒(Ⅲ)的吸附行为,测定了不同介质pH、温度、吸附时间等因素对吸附的影响.测得该阳离子交换树脂在HAc-NaAc体系pH=5.7时吸附Er3 的性能最佳,其静态最大吸附量为280mg·g-1;测得其表观吸附速率常数k298=2.58×10-5s-1;测得吸附热力学参数分别为:△H=13.05kJ·mol-1,△S=50.52J·mol-1·K-1,△G=-2.00kJ·mol-1,该树脂对Er3 的表观吸附活化能Ea=10.42kJ·mol-1;树脂吸附铒(Ⅲ)符合Freundlich经验式.并对负载树脂解吸进行探讨.     

D152树脂对镝的吸附及机制

对D152树脂吸附镝(Ⅲ)的过程及镝在D152树脂上的吸附行为进行了研究。研究了介质pH、温度、吸附时间、树脂量等因素对吸附过程的影响。实验结果表明:D152树脂对镝(Ⅲ)的吸附在pH=5.93的HAc-NaAc的缓冲溶液中为最佳。25℃时静态饱和吸附量为314.6mg.g-1(干树脂)。用1.0 mol.L-1的HCl溶液作为解吸剂,解吸率为96.2%;D152树脂对镝(Ⅲ)的表观吸附活化能Ea=18.28 kJ.mol-1,表观吸附速率常数k298=2.54×10-5s-1,k308=2.93×10-5s-1,k318=4.05×10-5s-1,测得热力学参数分别为ΔH=18.19 kJ.mol-1,ΔG=-0.88 kJ.mol-1,ΔS=63.99 J.mol-1.K-1,等温吸附服从Freundlich经验式。并用化学和红外光谱的方法探求树脂对镝(Ⅲ)的吸附机制。     

BK110树脂吸附铒的研究

研究了BK110树脂在HAc-NaAc缓冲体系中对铒离子的吸附及解吸的行为,在pH=5.60时吸附最佳.静态饱和吸附容量为256mg·g-1(树脂),用0.3mol·L-1～2.0mol·L-1 HCl可定量洗脱;测得吸附速率常数k298=4.28×10-5sec-1,表观活化能Ea=26.0kJ·mol-1;吸附服从Freundlich经验式;热力学参数△H=12.2kJ·mol-1.用化学和红外光谱等方法探讨了吸附机理.     

偕胺肟基纤维对Sm(Ⅲ)、Nd(Ⅲ)、Pr(Ⅲ)的吸附与富集

以偕胺肟基纤维 (用 L 表示 )为吸附剂 ,对 Sm( )、Nd )、Pr( )进行螯合吸附 ,再将螯合后的纤维进行解吸 ,使稀土离子得到富集。通过实验确定出最佳吸附条件为 :温度 5 0℃、时间 30～ 6 0 m in、p H3～ 4 ;最佳解吸条件为 :0 .0 2～ 0 .0 8m ol· L- 1 HCl、室温、30～ 6 0 min。纤维 L 对 Sm( )、Nd( )、Pr( )三种离子的一次吸附的最大量分别为 2 .99、2 .86、4 .11mg· g- 1 (被吸附离子的初始浓度 C0 =0 .0 0 1mol· L- 1 )。L 对三种离子均可进行三次以上累积吸附。     

312树脂吸附钒的行为研究

研究312树脂吸附钒的过程,结粜表明:pH值与钒在溶液中的赋存状态有关,且pH值对312树脂吸附钒的影响很大,在pH=2.0时吸附效果最好.吸附交换速率主要受液膜扩散控制,表观吸附速率常数k298=2.07×10-5s-1.吸附过程遵循Freundlich方程;吸附热力学参数△H=9.26 kJ·mol-1,△S=53.59 J·mol-1·K-1,△G298=-6.71 kJ·-1ml-1,表观吸附活化能Ea=62.5 kJ·mol-1,可用4%NaOH溶液解吸.     

氨基膦酸树脂吸附铈的研究

研究了铈(Ⅲ)在氨基磷酸树脂上的吸附行为。试验结果在pH5.0时,静态饱和吸附容量为197mg/g干树脂;用2mol.L-1HCl洗脱,洗脱率为98.1%;表观速率常数k298=2.71×10-5s-1;等温吸附服从Freundlich经验式;吸附反应中的△Ho=50.0kJ.mol-1,△So=286J.mol-1.K-1,△Go=-35.1kJ.mol-1。树脂功能基与Ce3+的配比为2∶1;并用红外光谱探讨了树脂与铈的成键。     

钯与氢(H2,D2)反应的热力学性质研究

采用PVT方法精确测定了 40～ 60目的海绵钯 (Pd)粉末在 5～ 5 0℃范围内吸放H2 ,D2 的P C T曲线。结果表明 :2 5℃ ,0 .1MPa时H2 ,D2 在Pd中的溶解度分别为 75 .8和 70 .4ml(STP)·g- 1 Pd;Pd与H2 ,D2 反应的坪台热力学函数分别为 :ΔHa=-18.7kJ·mol- 1 H ,-17.6kJ·mol- 1 D ,ΔSa=-4 6.4J·K- 1 ·mol- 1 H ,-4 9.6J·K- 1 ·mol- 1 D ;ΔHd=2 1.3kJ·mol- 1 H ,18.7kJ·mol- 1 D ,ΔSd=5 0 .8J·K- 1 ·mol- 1 H ,49.1J·K- 1 ·mol- 1 D。H ,D在α相的溶解热力学函数为 :ΔHr→ 0 =-6.5kJ·mol- 1 H ,-5 .6kJ·mol- 1 D ;ΔSr→ 0 =-5 3 .5J·K- 1 ·mol- 1 H ,-5 3 .7J·K- 1 ·mol- 1 D。Pd Q(Q =H ,D)体系存在明显的迟滞效应 ,升高温度可改善吸放氢循环的压力迟滞效应 ,但不能消除。伴随迟滞效应的吉布斯自由能损失 (ΔGloss)在低于 5 0℃时保持不变 ,对Pd H和Pd D体系分别为 1.2 8和 1.2 5kJ·mol- 1 H(D) ;当高于 5 0℃时ΔGloss分别减小约 4%和 11%。     

大孔膦酸树脂吸附钬的研究

大孔膦酸树脂(MPAR)对Ho(Ⅲ)的吸附在pH=4.59时最佳,静态饱和吸附容量244.8mg/g(树脂),测得298K时表观吸附速率常数k298=5.45×10-5s-1,吸附热力学参数△H=18.6kJ·mol-1,△S=190.6J·mol·K-1,△G=-38.2kJ·     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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