@article { author = {Tehrani-Bagha, A.R. and Amini, F. L.}, title = {Decolorization of a Reactive Dye by UV-Enhanced Ozonation}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {1-8}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75760}, abstract = {In the present study the treatment efficiency of O3 and UV+O3 processes were compared for the oxidation of simulated dyebath effluent containing a mixture of a reactive dye (C.I. Reactive Blue 19) and various dye auxiliary chemicals. The color, COD and TOC removal rates were assessed for different processes. The effect of initial dye concentration and presence of sodium hydroxide and sodium carbonate on decolorization kinetics were studied. The decolorization kinetics decreased by increase of initial dye concentration and addition of sodium hydroxide. The addition of sodium carbonate resulted in a lower COD removal. The experimental results showed that ozonation combined with UV irradiation (9-watt low-pressure mercury lamp) was slightly more efficient than ozonation alone in COD removal with no change in color removal efficiencies. At an initial pH of 6.2, bulk temperature of 25°C, ozone dosage of 55 g/m3 and initial dye concentration of 800 mg/L, the TOC removal efficiency of RB19 reached 19% and 27% after 90 min for O3 and UV+O3 processes, respectively.}, keywords = {reactive dye,Ozonation,UV Radiation,Decolorization,Mineralization}, url = {https://pccc.icrc.ac.ir/article_75760.html}, eprint = {https://pccc.icrc.ac.ir/article_75760_4b712117c0320b59ae6d8a3782f16d76.pdf} } @article { author = {Jebeli, Sh. and Vaezi, M. R. and Yousefi, A. A.}, title = {Chemical Synthesis of Nano-Crystalline Nickel-Zinc Ferrite as a Magnetic Pigment}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {9-17}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75761}, abstract = {The nano-crystalline nickel-zinc ferrite was prepared via chemical synthesis. Zinc nitrate, nickel nitrate, iron nitrate hydrate, citric acid and ethylene glycol were used as precursor materials. Crystallization behavior of the precursor was studied by X-ray diffraction (XRD). Nanoparticle phases can change amorphous to spinel ferrite depending on the calcination temperature and crystallite size calculated by Scherrer’s formula about 26-105 nm with the calcinations temperature. Morphological and structural properties were investigated by scanning electron microscopy (SEM).The powder density was measured using a helium pycnometer. Magnetization measurements were carried out on an alternative gradient force magnetometer (AGFM), which revealed saturation magnetization of the samples were strongly dependent on the calcination temperature and particle size of the sample and the saturation magnetization values of the samples increased as a function of the calcination temperature. Colorimetric analysis was measured by using UV-visible spectroscopy in the range of 300-700 nm. These result indicated a correlation between pigment color and calcinations temperature. The color of the pigment ranges from reddish brown to deep brown depending on the calcination temperature. Finally our results showed that the chemical synthesis method leads to obtain nano crystalline nickel zinc ferrite with good controllable stoichiometry at low temperature.}, keywords = {}, url = {https://pccc.icrc.ac.ir/article_75761.html}, eprint = {https://pccc.icrc.ac.ir/article_75761_51082b4bdff09ce873a2578a4fa58653.pdf} } @article { author = {Rasouli, S. and Saket, Sh.}, title = {One Step Rapid Synthesis of Nano-Crystalline ZnO by Microwave-Assisted Solution Combustion Method}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {19-25}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75763}, abstract = {In this study nano-crystalline ZnO particles were synthesized by microwave-assisted solution combustion method. Zinc nitrate and urea were used as oxidizer and fuel, respectively. The effect of fuel to oxidizer (F/O) ratio on ZnO powder properties was investigated by using different urea/nitrate ratios. X-ray diffractometer, scanning electron microscopy and fourier transform infra-red were used in powders characterization. The results showed that under microwave radiation the pure ZnO phase was formed after combustion reaction with different F/O ratios. The crystallite size was calculated in the range of 28-32 nm using Scherrers equation. The result has shown that F/O ratio variation influenced the particle morphology from pyramid structure to partially sintered spherical.}, keywords = {Solution combustion,Fuel effect,Nano,crystalline ZnO}, url = {https://pccc.icrc.ac.ir/article_75763.html}, eprint = {https://pccc.icrc.ac.ir/article_75763_b1f8f6490c510cbc38faff95ca3fe427.pdf} } @article { author = {Gardeshzadeh, A.R. and Raissi, B.}, title = {Thick Film Deposition of Carbon Nanotubes by Alternating Electrophoresis}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {27-31}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75762}, abstract = {Electrophoretic deposition of carbon nanotubes (CNTs) using alternating current electric fields (0.01-1000 Hz) is reported. Pure acetone was used as suspending medium. Two parallel gold electrodes were used as depositing substrate. The effect of depositing parameters such as frequency and three waveforms (sinusoidal, rectangular and triangular) on deposit yield was investigated. According to our experiments, thick films of CNTs are obtainable at frequencies as low as 0.01 to 10 Hz. Results showed that the deposit yield decreases as the frequency increases from 0.01 Hz to 1000 Hz. The rectangular waveform yields more deposit mass compared with sinusoidal and triangular waveforms. Comparison between AC and DC electric fields revealed that the deposition pattern is also different in AC and DC electric fields.}, keywords = {deposition,Carbon nanotubes,AC electrophoresis,Waveform,Thick film}, url = {https://pccc.icrc.ac.ir/article_75762.html}, eprint = {https://pccc.icrc.ac.ir/article_75762_56c27188bc9d17abba20d457e34cc8d4.pdf} } @article { author = {Tabatabaee, M. and Bagheri, H. and Shahvazian, M.}, title = {Application of Thionine Dye for Highly Sensitive and Selective Catalytic kinetic Determination of Osmium}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {33-40}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75764}, abstract = {Anew, highly sensitive and selective catalytic kinetic method (CKM) for determination of osmium (VIII) has been established based on its catalytic effect on the oxidation of thionine dye by hydrogen peroxide in alkaline medium. The reaction has been followed spectrophotometrically by measuring the decrease in the absorbance band of thionine at 600 nm. Under the optimum conditions, the proposed method allows determination of osmium concentrations in the range of 0.1 - 220 ng ml-1 with a detection limit of 0.015 ng ml-1. The relative standard deviations for 11 replicate determinations of 0.20, 2.0 and 20 ng ml-1 osmium (VIII) were 3.3, 1.0 and 0.69%, respectively. This method is free from of most interferences, highly selective, sensitive and very stable.}, keywords = {Osmium determination,Catalytic spectrophotometric,Thionine}, url = {https://pccc.icrc.ac.ir/article_75764.html}, eprint = {https://pccc.icrc.ac.ir/article_75764_d819fd017bea7a894a71ac65c8358cb1.pdf} } @article { author = {Badii, K. and Doulati Ardejani, F. and Aziz Saberi, M. and Abdolreza, Sh. and Hashemi Nasab, R.}, title = {Adsorption of Basic Organic Colorants from an Aqua Binary Mixture by Diatomite}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {41-46}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75765}, abstract = {D iatomite is an inexpensive natural mineral. It can be used as an adsorbent to remove organic and inorganic pollutants from the waste waters without further improvement. In this research, the adsorption of two different basic colorants including Basic Yellow 28 (BY28) and Malachite Green (MG) by diatomite has been investigated in an aqua binary mixture and the effects of different parameters has been examined. L27 matrix of Taguchi method was used to optimize the number of experiments. five parameters in three levels (low, medium, and high) were selected. These parameters were colorants concentration (two parameters), pH, time, and adsorbent concentration. Mixing speeds and temperature maintained a fixed value. The responses were the removal percentages of each colorant, separately. The results showed that each colorant concentration affects on the adsorption of other colorant and this process is sensitive to pH. In addition, the effects of adsorbent amount and time were as same as pH.}, keywords = {Adsorption,Diatomite,Waste water treatment,Binary Mixture,Basic organic colorants}, url = {https://pccc.icrc.ac.ir/article_75765.html}, eprint = {https://pccc.icrc.ac.ir/article_75765_31f398360da392a86ba5b76e2efda800.pdf} } @article { author = {Zarebidaki, A. and Allahkaram, S. R. and Rabizadeh, T.}, title = {Pretreatment Effect on the Properties of Electroless Nano - Crystalline Nickel Phosphorous Coating}, journal = {Progress in Color, Colorants and Coatings}, volume = {3}, number = {1}, pages = {47-57}, year = {2010}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2010.75766}, abstract = {the influence of mechanical polishing pre-treatments on steel substrates is investigated in terms of microstructure, deposition rate, adhesion, mechanical and corrosion properties of electroless Ni-P nanocoating with 9-10% wt. of P content. XRD analysis of Ni-P coatings demonstrated the nanocrystalline structure of coating with the grain size of 39 nm. Results showed that pretreatment of substrate can affect the microstructure and modularity of coatings. Coatings with homogeneous surface profile and lower nodule boundaries had higher corrosion resistance. The roughness of the substrate had a direct influence on the surface roughness of the substrate which had a direct influence on the surface roughness of the applied coating.Prog. Color Colorants Coat. 3(2010), 47-57. © Institute for Color Science and Technology.}, keywords = {Electroless,Ni,P Nanocoating,corrosion,surface preparation}, url = {https://pccc.icrc.ac.ir/article_75766.html}, eprint = {https://pccc.icrc.ac.ir/article_75766_8a7dc9c6829e126c5dd1d90beb267d55.pdf} }