Sonochemical Decolorization of Methyl Orange in Aqueous Solution

The sonochemical decolorization of Methylene Orange was studied using a 24 kHz Ultrasound device with a 1.4 cm diameter horn. pH, power density, the effects of pH and power density on decolorization were discussed. The combined effect of radiate time, the initial concentration of dyes and the addition of Fe^2＋ on the decolorization was studied using response surface methodology. The results showed that the factorial central composite design was successfully employed for experimental design and predication of the results. AtpH = 2.8, T=30℃, power denstity= 300 W/L and Fe^2＋ of 2 mg/L, the decolorization percentage of 5 mg/L dye solution reached 96% after 60 mill ultreatment. The rate of decolorization of the dye was greatly improved in the presence of Fe^2＋. The sonolysis of the dye followed first-order kinetics.     

The Relationship between Polarographic Reduction Potentials and Discharge Properties of Disperse Dyes

The half-wave potentials of disperse dyes with different structures are measured, the relationship between half-wave potentials and their discharge properties is discussed, then their effect factors are studied, such as the chemical structure types and substituents of disperse dyes and technological parameters. The results indicate that the halfwave potentials of disperse dyes when reduced could be used to characterize their reducing and discharge properties.     

聚合硫酸氯化铝铁絮凝剂的性能研究

文章研究了聚硫酸氯化铝铁 ( PA FCS)、聚合氯化铝 ( PA C)和聚合硫酸铁 ( PFS)投加量对絮凝效果的影响以及PAF CS使用 p H范围 ,比较了 PAFCS、氯化铁 ( FC)和硫酸铝 ( A S)的脱色效果 ,探讨了水中残留铝的脱除。研究结果表明 ,PAF CS除浊效果优于 PAC和 PFS,使 p H范围为 6 .5～ 8.5 ,对分散染料具有良好的脱色效果 ,脱色效果优于 F C和 A S,水中残留铝为 0 .14 mg/L。     

苯骈噻吩酮衍生物甲川型分散染料的研究 染料分子结构与颜色的关系

本文对一系列不同结构的苯骈噻吩酮衍生物甲川型分散染料的染色涤纶进行了颜 色测量；研究了染料在涤纶上的颜色与染科分子结构的关系。     

高铁酸盐/Al(OH)3对偶氮类染料的降解脱色研究

以电化学循环伏安法研究了FeO42-、甲基橙、酸性铬蓝以及铬黑T等偶氮类染料的氧化还原电位.实验结果表明FeO42-有足够高的氧化电位来氧化偶氮类染料中的生色基团.用紫外-可见光谱法分析了FeO42-对甲基橙、酸性铬蓝、铬黑T等偶氮类染料的降解脱色行为.经高铁酸盐处理后偶氮染料类废水溶液中的有机成分逐渐减少,脱色率高于...     

天然染发剂中对苯二胺定量分析

目的:测定市场上具有代表性的5种天然染黑染发剂中限用物质对苯二胺的含量,并根据含量<6%的行业标准进行品质及安全性评价。方法:采用高效液相色谱法(HPLC),Eclipse XDB-C18色谱柱(4.6 mm×150 mm,5μm),流动相为乙腈:pH 7.7的磷酸-1%三乙醇胺缓冲溶液5:95;流速0.8 mL/min;检测波长280 nm。结果:对苯二胺的检测浓度在0.025 0～0.400 0 mg/mL范围内线性关系良好(r=0.999 9);平均加样回收率为99.27%,RSD=1.49%(n=6)。5种染发剂中对苯二胺的含量在0.23%到1.87%不等。结论:5种染发剂中均含对苯二胺,但均未超过限用标准;本法准确、灵敏、重复性好,可作为天然染发剂中对苯二胺含量测定的有效方法。     

甘肃黄芪根瘤菌耐盐性及化学试剂和染料的抗性研究

选用67株分离自甘肃兰州地区的黄芪根瘤菌菌株,测定了供试菌对甲基蓝、甲基红、亚甲基蓝、刚果红、孔雀石绿5种染料和脱氧胆酸钠、亚硝酸钠2种化学试剂的抗性反应,及耐盐性测定.测定结果表明:黄芪根瘤菌具有较强的耐盐性,36％的菌株可以耐受5％NaCl,21％的菌株可以耐受6％NaCl;黄芪根瘤菌对两种化学药物脱氧胆酸钠和亚硝酸钠均具有极高的抗性,几乎所有菌株都能在终浓度为0.1％和0.2％的YMA培养基上生长;不同的黄芪根瘤菌菌株对不同染料具有不同的抗性,对不同浓度的同种染料也具有不同的抗性,同种黄芪根瘤菌菌株对不同染料具有不同的抗性,对不同浓度的同种染料也具有不同的抗性.     

烷基咪唑/五氧化二钒插层化合物的组装、表征及性能

以两种烷基咪唑类离子液体(13,-二甲基咪唑碘、1-丁基-3-甲基咪唑碘)为插层客体,通过氧化还原的方法,合成了烷基咪唑/V2O5的插层化合物。采用FT-IR、XRD、UV-vis DRS和元素分析对其结构组成进行了分析,结果表明1-丁基-3-甲基咪唑1、,3-二甲基咪唑离子已被插入到V2O5层间。电镜结果表明,所合成的材料是具有层状结构,且形貌像稻草束的纳米烷基咪唑/V2O5插层化合物。此类插层材料在水溶液中对亚甲基蓝具有很强的吸附能力,是一类对亚甲基蓝具有特殊吸附性能的新颖插层化合物。在一定条件下,该类插层化合物对染料甲基橙具有良好的光降解效果。     

Tungstate ion resonance Rayleigh scattering method for determination of basic triphenylmethane dyes

In a pH 4.2-6.0 HAc-NaAc buffer medium,the resonance Rayleigh scattering intensities of separate basic triphenylmethane dyes,such as methyl violet (MV),ethyl violet (EV),crystal violet (CV),methyl green (MeG),iodine green (IG),malachite green (MG),light green (LG),and tungstate ion solution,are very weak,but when these cationic dyes react with the tungstate ion (WO 42-) to form ion-association complexes,their RRS are enhanced sharply and new RRS spectra appear.The reaction products of methyl violet,ethyl vi...