镁铝交联膨润土吸附处理结晶紫废水的研究

以镁铝双金属离子低聚物为交联剂,制备了复合联膨润土,用于处理含结晶紫染料的废水。通过改变废水溶液pH值、吸附剂用量和搅拌处理时间等因素研究了镁铝交联膨润土对结晶紫的吸附特性和处理效果。研究表明,镁铝交联膨润土对阳离子染料结晶紫废水的脱色率较好,可以达到99%以上。此外,还对镁铝交联膨润土与膨润土原土的处理效果进行了比较。结果表明,用镁铝交联剂对膨润土进行改性后吸附能力显著增强,脱色率在98%以上。由于膨润土的储量大、价格低,是一类很有发展前景的优质廉价吸附剂。     

铝交联改性膨润土处理低浓度含磷废水的研究

针对低浓度含磷废水,用铝交联剂对膨润土进行改性,并用改性膨润土处理低浓度含磷废水。结果表明铝交联改性膨润土对低浓度含磷废水有较高的去除率;利用方差分析得到改性膨润土处理低浓度含磷废水的最优条件为改性膨润土投加量为1g／100ml。废水,搅拌时间为30min,pH值为7。     

聚乙烯醇-壳聚糖/膨润土多孔材料的制备及性能研究

本文以壳聚糖、膨润土、聚乙烯醇为原料,制备了多种复合海绵,并对其吸水倍率,降解印染废水效果以及吸附废水中锌离子的性能进行了探究。研究表明,在聚乙烯醇缩甲醛泡沫中加入壳聚糖或膨润土会使其吸水倍率明显下降。采用聚乙烯醇缩甲醛共混海绵处理模拟染料废水,壳聚糖/膨润土复合海绵效果最好,对酸性橙和艳兰的脱色率分别可达到92%和85%。纯PVA海绵以及单一膨润土共混海绵对锌离子的吸附效果较差,壳聚糖共混海绵吸附效果较好,壳聚糖/膨润土共混海绵吸附效果最佳,可达87.9%。由此说明,在壳聚糖共混海绵中引入膨润土,可以使复合海绵的比表面积进一步增大,提高其吸附效果。     

铁钛无机交联膨润土的制备及其对COD的吸附研究

以钠基膨润土为原料,制备了铁钛无机交联膨润土,应用于模拟废水的处理。以对COD的去除率为指标,利用正交试验研究制备铁钛无机交联膨润土的最佳实验条件及其吸附模拟废水的最佳实验条件。结果表明：铁钛无机交联膨润土对COD表现出较好的吸附性能。当悬浮液浓度为3％、铁钛摩尔比为16：1、交联剂／土(mmol／g)为15：1、反应温度为40℃、反应时间为3h为制备的最佳实验条件。当废水pH值为3．0、吸附剂用量为14g／L、吸附时间为30min时,为吸附模拟废水的最佳实验条件,此时COD的去除率可达90％以上。     

铁钛交联有机膨润土对COD的吸附研究

钠基膨润土为原料 ,制备了铁钛交联有机膨润土 ,应用于模拟废水的处理。利用正交试验研究了铁钛交联有机膨润土吸附模拟废水中的COD的性能、条件。结果表明 ,铁钛交联有机膨润土对COD表现出较好的吸附性能。当废水pH为 5 .0、吸附剂用量为 1 0 g/L、吸附时间为 4 0min时 ,COD去除率可达 80 %以上     

改性膨润土处理含磷废水的研究

铝盐改性的膨润土吸附处理含磷废水,研究了铝盐含量、搅拌时间、pH值和磷的初始浓度对处理效果的影响。     

镁铝碱式盐对铬（Ⅵ）吸附性能研究

进行了镁铝碱式盐和添加膨润土镁铝碱式盐吸附铬实验。实验证明镁铝碱式盐对铬有良好吸附性，添加一定数量膨润土能显著提高镁铝碱式盐吸附能力。     

铝柱撑改性膨润土处理电镀废水中Cr6+的实验研究

以膨润土为原料制备了铝柱撑改性膨润土,并研究了不同影响因素对铝柱撑改性膨润土去除电镀废水中Cr6+的影响.结果表明:铝柱撑改性膨润土对Cr6+的去除率明显优于膨润土原土;废水的pH、吸附时间和膨润土投加量对Cr6+的去除率影响较大;pH＝4,吸附时间为40 min,投加质量浓度为40 g/L,铝柱撑改性膨润土对Cr6+的去除率达到最大86.1％;铝柱撑改性膨润土对电镀废水中Cr6+的吸附符合Langmuir吸附等温方程.     

热改性膨润土对氨氮废水的处理

该实验在静态条件下，研究了热改性膨润土对氨氮废水的处理。研究了热改性膨润土的种类、搅拌时间、膨润土用量、废水DH值、废水温度、废水中氨氮浓度对处理结果的影响，并且将膨润土处理氨氮废水的最佳效果与粉煤灰处理效果进行了比较。实验结果表明，经300℃热改性的膨润土5g在搅拌时间为40min时，对100mL浓度为160mg／L的氨氮废水的吸附效果很好，且达到了国家一级排放标准（15mg／L）。废水pH值越高对处理效果越好，废水中氨氮浓度越高处理效果越差。在同等操作条件下，热改性膨润土的吸附效果远优于粉煤灰。     

系列改性膨润土处理含铜废水的应用研究

以新疆哈密拉伊格来克膨润土为原料,制备了羟基锰铝无机改性、十二烷基苯磺酸钠(SDS)和十八烷基三甲基氯化铵(1831)复合改性的阴-阳离子有机改性膨润土,比较了膨润土原土,改性膨润土处理含铜废水的性能,研究了改性膨润土的加入量、pH、吸附时间等因素对改性膨润土吸附实验的影响。结果表明,改性膨润土对废水的处理效果明显好于原土,改性膨润土在投加量为15g/L、pH为7、吸附时间30min、Cu2+质量浓度为40mg/L时,羟基锰铝无机改性膨润土对Cu2+去除率达到90%,阴-阳离子改性膨润土对Cu2+去除率达到93%。     

基于锌电解过程机理模型的酸锌浓度控制策略

锌电解过程是一个典型的大惯性系统，电解槽的酸锌浓度往往难以控制。提出了基于锌电解机理模型的酸锌浓度前馈-反馈控制方法，以克服电流密度、进液浓度工艺参数的扰动。首先在Scott等提出的锌电解机理模型基础上，估计了传质系数等关键参数，得到了锌电解能耗模型，再加入电解槽酸锌浓度的物料动态平衡模型，从而建立了较完整的锌电解过程仿真模型。针对电流密度变化、进料中锌浓度波动等扰动引起电解液酸锌浓度变化的情况，提出了电解液锌浓度的前馈-反馈控制策略，其中反馈通道采用PID控制，而前馈通道的增益直接由机理模型计算得到。最后以仿真模型为对象验证了该控制策略，仿真结果表明该方法简单有效。     

循环水中锌离子稳定性的研究

研究了循环水中锌离子的稳定性,讨论了磺酸盐共聚物和水质因素对锌离子稳定性的影响。结果表明,随着磺酸盐共聚物ZF322浓度的增大,循环水中锌离子的稳定性增强;三价铁离子、钙离子浓度和碱度的增加都会降低锌离子的稳定性;正磷在低浓度时可增强其稳定性;pH值对锌离子稳定性影响很大,但加入药剂后影响比较小。     

Foam fractionation of zinc

The foam fractionation of zinc ion from dilute aqueous solution with sodium dodecylbenzene sulfonate (NaDBS) as collector was studied using a single stage foam apparatus. Results are expressed as the surface excess and distribution factor of zinc. The optimum pH for the removal of zinc was found to be from 3.0 to 5.0. Efficient removal of zinc (high distribution factor) took place at low zinc ion concentration (less than 5 ppm) and low collector concentration consistent with a stable foam. The order of effectiveness in the removal of zinc by various forms of collector was found to be KDBS < NaDBS < LiDBS < HDBS.     

硅酸盐色谱分离中性氨基酸性能研究

将硅酸钠与硫酸铜或硫酸锌按等体积混合 ,制得新型无机离子交换剂硅酸铜、硅酸锌 ,分别用其作为色谱载体对中性氨基酸 (甘氨酸 ,丙氨酸 )进行分离 ,与强酸性阳离子交换树脂 0 0 1× 7的色谱行为作了比较。结果表明 ,合成的硅酸盐具有较好的分离性能。通过不同载体分离中性氨基酸 (甘氨酸 ,丙氨酸 )的流出体积的比较 ,硅酸铜的流出体积大于硅酸锌 ,硅酸锌的流出体积大于 0 0 1× 7。结果显示 ,硅酸铜比硅酸锌更适合于分离中性氨基酸 ,具有最好的分离特性     

Die kinetik der zinkelektrode in wässrigen malonatlösungen

The kinetics of dissolution and deposition of zinc in sodium malonate solutions containing NaClO₄ as the base electrolyte was investigated. The steady state polarization curves and the frequency dependence of the faradaic impedance indicate a consecutive charge-transfer reaction with adsorbed monovalent zinc as the intermediate. The dependence of the polarization curves and of the faradaic impedances on the concentrations of malonate and zinc salt are explained by the following mechanism: During the anodic transfer reaction of zinc yielding monovalent zinc a complex with one malonate ion is formed. The subsequent oxidation to divalent zinc can follow two parallel paths of comparable rates. The charge-transfer reaction may directly yield a zinc complex with two malonate ions, or, a complex with one malonate ion may participate in the charge-transfer, the complex with two malonate ions being the product of a homogeneous reaction in solution.     

Zinc-nickel alloy deposition in the presence of citrate ions

A new bath for zinc-nickel alloy electrodeposition has been studied using citrate as a complexant. Citrate ion was found to increase the zinc content of the alloy. Cyclic voltammetric studies were carried out to elucidate the effect of citrate ion in codeposition. The cathodic and anodic peaks indicate that due to efficient control of surface pH citrate ions cause depolarization during deposition. The absence of two cathodic peaks with decreasing nickel/zinc ratio reappeared in the presence of citrate ion. This led, not only to increased zinc content in the alloy, but also to reduced impurity content which affected the mechanical properties. This effect has been studied at varying zinc/nickel ratios and scanning potential ranges.     

The effects of chloride ion and organic extradants on electrowon zinc deposits

The effects of chloride ion and the organic extractants: Kelex 100, Versatic 911, di-2-ethylhexyl phosphoric acid, tri-n-butyl phosphate, LIX65N and Alamine 336 on the structure of 1h zinc deposits electrowon from synthetic and industrial acid sulphate electrolytes are presented. Under simulated tankhouse conditions the effect of chloride ion concentration on the zinc deposit morphology and orientation becomes significant only at the 500 mgl^–1 level. The tolerance limit of the zinc deposits to organic extractants such as Kelex 100 is extremely low. In some cases the adverse effect of these organic impurities is offset by the presence of chloride ion in the electrolyte. Purification of electrolyte contaminated with organic extractants by activated charcoal results in a vastly improved zinc deposit structure. Organic extractants such as Kelex 100 and TBP which have an adverse effect on the zinc deposits, also have a pronounced effect on the zinc deposition polarization curve.     

牛磺酸锌的研究进展

牛磺酸锌是牛磺酸和无机锌盐的螯合产物,可以作为一种的新型治疗药物、食品添加剂或金属元素补充剂,具有很高的研究和开发价值。本文就目前牛磺酸锌的合成和药效学研究进展进行综述并介绍了其应用前景。     

活性氧化铝对废水中锌离子的吸附性能

本文设计了正交水平实验对活性氧化铝吸附锌离子条件进行优化,主要考察了锌离子浓度、温度和溶液的pH值对锌离子吸附容量的影响。测定了锌离子在活性氧化铝上的吸附平衡和动力学数据,吸附平衡符合Freundlieh方程,并得到了模型参数,说明Freundlich模型能够描述本体系的特性。     

Removal of zinc ions from aqueous solution using a cation exchange resin

The present study is concerned with the mass transfer and kinetics study of zinc ions removal from aqueous solution using a cation exchange resin packed in a rotating cylindrical basket reactor. The effect of various experimental parameters on the rate of zinc ion removal, such as initial zinc ion concentration, packed bed rotation speed and temperature has been investigated. In addition to find a suitable equilibrium isotherm and kinetic model for the zinc ion removal in a batch reactor. The experimental isotherm data were analyzed using the Langmuir, Freundlich and D–R equations. The equilibrium data fit well in the Langmuir isotherm. The experimental data were analyzed using four sorption kinetic models, pseudo-first and second-order equations, the Elovich and the intraparticle diffusion model equation, to determine the best fit equation for the biosorption of zinc ions onto purolite C-100 MH resin. Results show that the Elovich equation provides the best correlation for the biosorption process.