D001大孔强酸型树脂吸附硫脲金的研究

研究了在弱酸性介质中，Ｄ００１大孔强酸型树脂吸附及分离硫脲金的性能。结果表明，在ｐＨ≈２．０，树脂对硫脲金离子Ａｕ（Ｔｕ）有良好的吸附（Ｔｕ＝硫脲），静态吸附容量可达６１．１８ｍｇ／ｇ－Ｒｅｓｉｎ。饱和吸附柱可用０．１ｍｏｌ·Ｌ￣（－１）ＮａＯＨ—０．１ｍｏｌ·Ｌ￣（－１）ＮａＣＮ混合溶液定量洗脱。     

高硫高强铸铁金属型铸造中S—Si的作用

研究了高硫高强铸铁金属型铸造时，硫对白口化的作用和Ｓ／Ｓｉ值对退火时间及石墨形态的影响，结果表明合适的硅硫含量各为Ｓｉ＝２．０％￣２．５％，Ｓ＝０．２％￣０．４％，Ｓ／Ｓｉ〉０．１。指出了Ｓ／Ｍｎ值对石墨形态的重要作用，论述了硫的作用机理。     

Pepset再生砂的应用及气孔缺陷的防止

为防止铸件气孔缺陷，应控制再生砂：灼减≤２％，泥分≤０．４％，水分≤０．２５％，ＡＤＶ：０～５最好，５～２０为可使用范围。调节树脂组分Ⅰ／组分Ⅱ＝５５／４５或６０／４０，严格控制树脂总量≤１．４％。铸造工艺上则采用缩短浇注时间，适当提高浇注温度及提高铁水碳当量等措施     

Au（Ⅲ）－5－Br－PADAP配合物吸附波的研究

在ｐＨ４．３０的ＨＡｃ－ＮａＡｃ缓冲液中，Ａｕ（Ⅲ）与５－Ｂｒ－ＰＡＤＡＰ经沸水浴加热形成１：Ｉ紫色配合物，在示波极谱仪上－０．６０Ｖ（ｖｓ，ＳＣＥ）产生一灵敏的配合物吸附波。线性范围５．０×１０￣（－８）～２．００×ｌ０￣（－６）ｍｏｌ／Ｌ检出限２．０×１０８ｍｏｌ／Ｌ．研究３０多种离子的干扰及分离条件。用聚氨酯泡沫塑料分离金用于矿样中金的测定，结果良好。     

抗癌药物碳铂中微量银的测定

在５％ＨＮＯ３介质中，用石墨炉原子吸收法测定抗癌药物碳铂中微量Ａｇ，检测范围为０￣０．２μｇ／ｍｌ，可测定０．０００ｘ￣０．００ｘ％含量的Ａｇ，测定误差±１０％。     

原材料对铸造覆膜砂质量的影响

通过对覆膜砂表面覆膜情况的显微分析和硬化强度的测试，深入研究了原材料对（冷法）覆膜砂质量的影响情况。认为尽可能地采用圆砂、粗砂（如４５／７５）和干砂（如含水量≤０．１５％￣０．２０％）、控制酒精含水量（如不高于５％）、合理使用树脂量等对获得高质量的覆膜砂均有重要作用。     

铱—钼酸盐—丁基罗丹明B—PVA_（－124）体系光度法测定铱

在聚乙烯醇（ＰＶＡ）存在下，Ｉｒ（Ⅳ）与钼酸盐和丁基罗丹明Ｂ（ＢＲＢ）形成离子缔合物。测定Ｉｒ的适宜条件为Ｃ＿（ＨＣιＯ４）＝１．３ｍｏｌ／Ｌ，Ｃ＿（ＭｏＯ＿４）￣（２－）＝１．１×￣（－３）ｍｏｌ／Ｌ，Ｃ＿（ＢＲＢ）＝３．８×１０￣（－５）ｍｏｌ／Ｌ，ＰＶＡ０．０８％。离子缔合物的最大吸收位于５７０ｎｍ，摩尔吸光系数ε值为８．７５×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），至少可稳定一周，Ｉｒ量在０～２．５μｇ／２５ｍｌ服从比尔定律，测定极限为８．３ｎｇ／ｍｌ（ｎ＝１１），对于０．０８μｇ／ｍｌＩｒ测定的相对标准偏差为２．８％（ｎ＝８）。考察了４１种共存离子的影响，其他贵金属和Ｓｂ（Ⅱ）。Ｇｅ（Ⅳ）、Ｓｉ（Ⅳ）干扰，需采用火试金分离。本法已用于某些岩矿和冶金中间产品中Ｉｒ的测定，结果满意。用平衡移动法测定缔合物的摩尔比为Ｉｒ：ＢＲＢ＝１：４，探讨了反应机理。     

吐温80─H_2O_2化学发光新体系测定痕量lr（Ⅳ）

建立了吐温８０─Ｎ＿２Ｏ＿２体系测定痕量铱的新的化学发光分析法，方法的检测限为３．０×１０￣（－９）ｇ／ｍｌ；线性范围为１．０×１Ｏ￣（－８）～１．０×１０￣（－５）ｇ／ｍｌ；测定１００ｐｐｂ铱溶液的相对标准偏差为６．５％。     

用L2铸轧板生产深冲用板的工艺

用Ｌ２铸轧板生产深冲用板，并取得了较好的效益。生产深冲用的Ｌ２铸轧板时，Ｓｉ≤０．２０％，Ｆｅ≤０．５％，Ｆｅ／Ｓｉ＝１．１￣２．６，晶粒度不大于２级，高压锅用冷轧板成品退火制度选取４５０￣４７０℃／６ｈ。     

钌在含氮或氮硫杂环树脂上的吸附行为

研究了配位原子为氮或氮硫的５种新型功能性树脂对Ｒｕ（Ⅳ）的吸附行为（３－氨甲基吡啶树脂（３－ＡＭＰＲ）、吡唑树脂（ＰＡＺＲ）、２－氨甲基吡啶树脂、Ｎ－甲基－２－硫咪唑树脂、２－硫－苯骈咪唑树脂的功能基（ＦＧ）含量为３．１６～４．８７ｍｍｏｌＦＧ／ｇ树脂），以及酸度、温度、时间对吸附的影响。测定其吸附容量、吸附比、吸附速率常数、吸附熵、分配系数和洗脱率等参数。３－ＡＭＰＲ有最高的吸附容量１．６４ｍｍｏｌＲｕ（Ⅳ）／ｇ３－ＡＭＰＲ和最低的吸附比１．９４ＦＧ／Ｒｕ（Ⅳ）（摩尔比）。吸附在ＰＡＺＲ上的Ｒｕ（Ⅳ）可被５％硫脲水溶液：丙酮：盐酸＝１：１：２（体积比）的混合溶液洗脱，洗脱率１００．３％。化学法，红外谱图阐明了树脂吸附Ｒｕ（Ⅳ）的机理。     

N503萃淋树脂分离富集金

研究了N_(503)萃淋树脂的合成方法及其分离富集金的条件.N_(503)萃淋树脂是萃取色层分离富集金的新固定相.2%硫脲、1%亚硫酸钠水溶液均可以定量解脱柱床上的金.经矿样验证,金的测定结果与717离子交换树脂吸附法一致.红外光谱表明该萃取色层与N_(503)液液萃取金有相同的机理.     

新型硫脲螯合树脂对金(Ⅲ)吸附性能的研究

用静态法较系统地研究了新型硫脲树脂从酸性含金氯化溶液中吸附金及其解吸金的性能,结果表明,在实验条件下,新树脂在含有Au3+、Cu2+、Ni2+和Fe3+等离子的混合体系中,对Au3+有良好的吸附容量和选择性,并能定量地解吸树脂所吸附的Au3+。在适宜条件下,该树脂对金的吸附率和解吸率均达到98%以上。     

717阴离子交换树脂吸附高盐废水中金的性能研究

研究了717阴离子交换树脂吸附高盐度废水中金的性能,考察了p H、吸附时间及树脂用量对树脂吸附金的影响。结果表明,pH值对吸附率影响较大,p H=2时,经60 min吸附,1.0 g树脂对100 mL金浓度为10.6 mg/L高盐废液中金的吸附率达95%以上;树脂对金的静态饱和吸附量为241 mg/g;吸附反应符合准二级反应动力学模型,升高温度对金的吸附有利,表观活化能Ea=21.3kJ/mol。     

离子交换树脂法吸附、解吸钯工艺研究

用9335型阴离子交换树脂吸附经王水溶解的含钯物料,可以选择性吸附钯,铜、镍等杂质不被吸附。用8%氨水、40 g/L氯化铵解吸,98%以上的钯被解吸。吸附操作简单,解吸后的树脂可重复使用。     

Adsorption of gold(III) from waste rinse water of semiconductor manufacturing industries using Amberlite XAD-7HP resin

Advanced hydrometallurgical separation processes are gaining significant importance for the recovery of gold from the aqueous solutions viz. leach liquor of waste electronics, plating material solutions, and waste wash water from electronic industries. In the present investigation, gold adsorption from the waste rinse water of semiconductor manufacturing industries is reported using Amberlite XAD-7HP. For experimental purposes, chloride waste rinse water that contained primarily Au (281 mg/ L) with trace amounts of Cu, Ni, Zn, Sn etc was used. Batch studies were carried out to optimize various process parameters, including contact time, acidity of solution, and resin dosage for the adsorption of gold from the above waste effluent. Adsorption of 92.25% gold was found from the waste solution within a contact time of 30 minutes at an aqueous to resin (A/R) ratio of 25 mL/g and an equilibrium pH of 0.63. In optimal conditions, the loading capacity of resin for gold was observed to be 58.82 mg of gold/g of resin. The gold adsorption phenomena were confirmed by the comparative FT-IR spectroscopic characterization studies of fresh resin and gold loaded resin. Elution tests were carried out for the elution of gold from the gold loaded resin using various ratio mixtures of acetone and 1.0 M HCl. An elution efficiency of 96.96% gold was achieved at an acetone-to-acid ratio of 9. In this condition, gold-enriched solution containing 7,240 mg gold/ L was obtained. The maximum elution of gold was found to be 99.33% using pure acetone in a contact time of 30 minutes. The data obtained will be useful to simulate the continuous gold adsorption process within a column.     

Adsorption of platinum (Ⅳ) onto D301R resin

Pt (Ⅳ) was quantitatively adsorbed by D301R resin in the medium of pH=3.47. The statically saturated adsorption capacity is 410 mg/g.Pt (Ⅳ) adsorbed on D301R resin can be eluted by 1.0-2.0 mol/L NaOH. The rate constant is k298=5.43×10-5s-1. The adsorption of Pt (Ⅳ) on D301R resin obeys the Freundlich isotherm. The adsorption parameters of thermodynamics are as follows: enthalpy change ΔH=4.37 kJ/mol, Gibbs free energy change ΔG=-5.39 kJ/mol, and entropy change ΔS=32.76 J/(mol.K). The apparent activation energy is Ea=22.5 kJ/mol. The coordination molar ratio of the functional group of D301R resin to Pt(Ⅳ) is 2:1.     

高岭石对氰化浸金的影响及助浸研究

采用电化学实验研究了在氰化浸金过程中常见矿物高岭石对金溶解速率及对溶液中金的吸附效果的影响。结果表明,高岭石的存在会使金的溶解速率加快,随着高岭石粒度逐渐降低金的溶解速率提高,且高岭石对溶液中金的吸附率增加。氰化浸出实验结果表明,高岭石存在时金的浸出率由93.21%降低到91.76%,采用柠檬酸三钠、过氧化镁和十二烷基硫酸钠助浸时,金浸出率升高至94.42%。能谱分析(EDS)发现浸出物中高岭石表面有金元素存在,表明高岭石会吸附溶液中的金。红外光谱分析和密度泛函理论计算表明,高岭石与金发生化学吸附作用,氢原子为高岭石的活性位点,C6H5O7^3-会优先吸附于高岭石(001)表面,加入助浸剂可降低高岭石与金的吸附强度,提高金的浸出率。     

白云母对氰化浸金的吸附效应研究

采用多种手段研究了金矿石中白云母对氰化浸出液中的金吸附效应。吸附试验考察了不同粒级白云母对溶液中金吸附率的影响,结果表明,白云母粒度越细,溶液中金的吸附率越高,吸附率由1.29%提高至5.35%;电化学溶解实验表明,白云母粒度越小,金的溶解速率越大;对浸金产物的扫描电镜(SEM)和能谱(EDS)分析表明,金的氰化络合物易吸附在白云母端点处;红外光谱分析显示,金氰化物与白云母存在化学吸附。密度泛函理论(DFT)模拟计算结果显示,金氰化物与白云母(001)表面的吸附强度为[Au(CN)2]-?AuCN。     

树脂分离富集-石墨炉原子吸收测定痕量钯

研究了Styrene—DVB—D301G大孔弱碱性苯乙烯系阴离子交换树脂对痕量Pd的吸附性能。在1％—10％HCl介质中，Pd与Cl^-形成的[PdCl6]^2-络阴离子被树脂吸附。吸附物灰化，王水溶解，在5％HCl溶液中用石墨炉原子吸收测定。方法检出限为0．8ng／g，测定国家一级标准样品中的Pd，结果与标准值相符，12次测定的RSD为6．1％—7．3％。方法用于测定水系沉积物中的痕量Pd。     

Synthesis of novel silica-supported chelating resin containing tert-butyl 2-picolyamino-N-acetate and its properties for selective adsorption of copper from simulated nickel electrolyte

A novel silica-supported tert-butyl 2-picolyamino-N-acetate chelating resin (Si-AMPY-1) was successfully synthesized and characterized by elemental analysis, FT-IR, SEM and ¹³C CP/MAS NMR. The adsorption behaviors of the Si-AMPY-1 resin for Cu(II) and Ni(II) were studied with batch and column methods. The batch experiments indicated that the Si-AMPY-1 resin adsorbed Ni(II) mainly via physisorption, while adsorbed Cu(II) via chemisorption. The column dynamic breakthrough curves revealed that the Si-AMPY-1 resin can efficiently separate Cu(II) from the simulated nickel electrolyte before the breakthrough point. Moreover, the concentration of Cu(II) in the column effluent was decreased to be less than 3 mg/L within the first 43 BV (bed volumes), and the mass ratio of Cu/Ni was 21:1 in the saturated resin, which completely satisfied the industrial requirements of the nickel electrorefining process. Therefore, it was concluded that the Si-AMPY-1 resin can be a promising candidate for the deep removal of Cu(II) from the nickel electrolyte.