@article { author = {Etezad, S. M. and Sadeghi-Kiakhani, M.}, title = {Decolorization of Malachite Green Dye Solution by Bacterial Biodegradation}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {79-87}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81670}, abstract = {Malachite green dye is widely used in food and textile industries for various purposes and also used as biocide in the aquaculture industry to control fungal attacks and protozoan infections. Surface and ground water is contaminated by dyes due to discharge of untreated wastewater from industries. The presence of malachite green in water causes serious health effects such as mutagenesis, respiratory toxicity and carcinogenesis. Therefore, removal of malachite green from water by using various techniques is an essential concern for living beings as well as environment. In this study, the ability of isolated bacteria (from oil contaminated soil) for biodegradation of MG dye was investigated. The bacterium was able to grow in temperature range of 25 to 45°C and pH range of 5 to 9. Optimum temperature and pH for bacterial growth were determined as 37 °C and 7, respectively. Effect of temperature, initial concentration of dye and shaking condition on decolorization of dye solution was also tested. 20 ppm MG dye was efficiently degraded by bacteria in less than 2 h, and biodegradation of MB dye followed first-order kinetics model. These properties make the bacteria suitable for industrial wastewater treatment.}, keywords = {Malachite Green,Decolorization,Wastewater,Biodegradation,Bacteria}, url = {https://pccc.icrc.ac.ir/article_81670.html}, eprint = {https://pccc.icrc.ac.ir/article_81670_8051dc05206ed9b9a99c3bb27c9a3125.pdf} } @article { author = {Cheikh S'Id, E. and Kheribech, A. and Degu, M. and Hatim, Z. and Chourak, R and M'Bareck, C.}, title = {Removal of Methylene Blue from Water by Polyacrylonitrile Co Sodium Methallylsulfonate Copolymer (AN69) and Polysulfone (PSf) Synthetic Membranes}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {89-100}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81690}, abstract = {Polyacrylonitrile-co-sodium methallylsulfonate copolymer (AN69) and polysulfone (PSf) synthetic membranes were prepared and used for the removal of methylene blue (MB) from water. Atomic Force Microscopy (AFM), Ionic exchange capacity (IEC), and Swelling ratio (Sr) were employed to determine the membrane characteristics. pH, membrane composition and initial dye concentration were used for the evaluation of the efficiency of MB adsorption on AN69/PSf membranes. Isotherms and kinetic models were applied to determine the adsorption mechanism and to calculate the values of adsorption parameters. The various methods reveal that with the increase of PSf percentage, the membrane surface becomes rougher and the average values of ionic exchange capacity and the swelling ratio reach 0.6 meq/g and 7%, respectively. The adsorption of MB is more efficient at higher pH (92%) and the maximum adsorption capacity reaches 75.75 mg/g. The mechanism of adsorption is perfectly fitted by pseudo-second order (R2 = 0.984) whereas the isotherm adsorption follows better the Freundlich isotherm (n = 1.49 and R2 = 0.96).}, keywords = {Methylene blue,Dye removal,AN69,Adsorption,Water treatment}, url = {https://pccc.icrc.ac.ir/article_81690.html}, eprint = {https://pccc.icrc.ac.ir/article_81690_51deff630188c781370a87755c9023aa.pdf} } @article { author = {Kouhestanian, E. and Ranjbar, M. and Mozaffari, S. A. and Salaramoli, H.}, title = {Investigating the Effects of Thickness on the Performance of ZnO-Based DSSC}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {101-112}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81685}, abstract = {Zinc oxide nanostructures exhibit unique properties which make them suitable for dye-sensitized solar cell applications. Their specific properties such as appropriate optical properties, proper energy band gap and high electron transfer characteristics have motivated researchers to use them in the fabrication of dye-sensitized solar cell photo-anodes. In the present study, the effect of thickness on the performance of a new ZnO photo-anode has been studied. All the photovoltaic parameters of the cells fabricated using N719 ruthenium dye were measured. SEM technique was utilized to determine the thickness and the UV-Visible method was used to study the transparent properties of the photo-anodes. Electrochemical impedance spectroscopy technique was employed to determine the appropriate equivalent circuit for studying the electron transfer mechanisms in all the fabricated cells. The results demonstrated that the ZnO thickness is a critical parameter for providing either sufficient resistance to suppress the charge recombination process or appropriate electron transferring properties. The optimized ZnO photo-anode was obtained at a thickness of 19 µm, which resulted in an efficiency of 3.22%.}, keywords = {Dye-sensitized solar cell,electrochemical impedance spectroscopy,Photo-anode thickness,Thickness effect,ZnO nanoparticles}, url = {https://pccc.icrc.ac.ir/article_81685.html}, eprint = {https://pccc.icrc.ac.ir/article_81685_e3625b622de5fd5dbfadc4b039e88f82.pdf} } @article { author = {Ataeefard, M. and Aarabi, A. M.}, title = {Producing Ceramic Toner Via Emulsion Aggregation Method Based on ZrSiO4: Pr Ceramic Pigment}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {113-120}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81703}, abstract = {Toner is a powder mainly composed of polymer and colorant that are used as ink in electrophotographic printing. Several methods have been employed for producing toner and one of is emulsion aggregation (EA) method. The purpose of this study is to produce ceramic toner based on ZrSiO4: Pr uses emulsion aggregation method and investigate the effect of ceramic pigment synthesis method on the final properties of the toner. For synthesis of zirconium silicate pigment with Praseodymium dopant, two combustion and combinational methods were studied. Ceramic Toner characteristics were analyzed using a spectrophotometer, X-ray diffraction, scanning electron microscopy, particle size analyzer and differential scanning calorimetry. Structural studies show that the pure phase of zirconium silicate can be identified as a pure phase in the toner  and toner particle size and particle size distribution  is in the appropriate (4-7 µm) range for printing. Thermal analyzes show an appropriate glass transition temperature at around 77 °C. Color specification shows that in spite of a decrees in color characteristics of the ceramic pigment at the manufacturing process of the toner, after application and baking at a temperature of 1000 °C, the color is converted to a suitable yellow intensity range.}, keywords = {ceramic toner,Electrophotographic printing,Ceramic pigment,Praseodymium Oxide (Pr6O11)}, url = {https://pccc.icrc.ac.ir/article_81703.html}, eprint = {https://pccc.icrc.ac.ir/article_81703_8982839620a829408c55f56253e63af6.pdf} } @article { author = {Tambi, S. and Mangal, A. and Singh, N. and Sheikh, J.}, title = {Cleaner Production of Dyed and Functional Polyester Using Natural Dyes vis-a-vis Exploration of Secondary Shades}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {121-128}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81700}, abstract = {atural dyes are known for their added benefits over synthetic dyes in terms of health and ecology. They are considered to present a limited range of shades, which limits their use in high-end value-added products. Thus, to explore natural dyes on large scales, it is essential to generate a wide range of shades like synthetic dyes. Therefore, it is important to explore the secondary shades of natural dyes especially those which can act as primary colors in the recipe (red, yellow and blue). In the present work, three natural dyes, namely indigo, pomegranate peels and kumkum were used to dye the polyester fabric. Along with color strength at different dye concentrations, functional properties such as antioxidant, antibacterial, and UV protection were also evaluated. The dyed polyester showed good color values (K/S>1.7) and also displayed satisfactory color fastness to light, washing and rubbing. The polyester fabric dyed with pomegranate and kumkum in self-shades displayed a variety of functional properties including a bacterial reduction of more than 90%, radical scavenging activity of greater than 90% and also displayed excellent UPF values (UPF > 270). Indigo-dyed samples displayed antibacterial activity and UV-protection; however, their antioxidant activity was poor. The secondary shades of these dyes were produced on polyester fabric.}, keywords = {polyester,Natural dyeing,Functional properties,Secondary shades}, url = {https://pccc.icrc.ac.ir/article_81700.html}, eprint = {https://pccc.icrc.ac.ir/article_81700_a919bc9b38db4803ec5268a4187d867e.pdf} } @article { author = {Alihoseini, M. R. and Khani, M. R. and Jalili, M. and Shokri, B.}, title = {Direct Sublimation Inkjet Printing as a New Environmentally Friendly Approach for Printing on Polyester Textiles}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {129-138}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81699}, abstract = {Polyester is one of the most important synthetic fibers extensively used in textile industry. Inkjet printing on polyester textile is performed either by direct or transfer approaches. The first method needs chemical surface treatment, while the latter uses transfer paper. In this article, direct sublimation inkjet printing (DSIP) on polyester textile has been studied to overcome the natural resource limitations and environmental problems by eliminating the need for transfer paper and chemical surface treatment. Polyester textile was surface treated using atmospheric-pressure plasma under air atmosphere. The effects of different factors including plasma speed, plasma power, and the number of treatments on the contact angle and K/S value have been investigated via experimental design method. Scanning electron microscopy (SEM), attenuated total reflection-fourier transform infrared (ATR-FTIR), and bleeding test showed that plasma power has the least effect on both K/S value and contact angle. The K/S values increased while the contact angle decreased by increasing the number of treatments and decreasing the plasma speed. Optical and scanning electron microscopy images also revealed that the treated textile using constant plasma power of 350 W, 60 plasma treatments and the plasma speed of 3 m/min showed the most printing thickness and the highest image resolution. }, keywords = {Direct sublimation printing,inkjet,atmospheric-pressure plasma,polyester,K/S value}, url = {https://pccc.icrc.ac.ir/article_81699.html}, eprint = {https://pccc.icrc.ac.ir/article_81699_606a07d1c8c1a859e1291491614fec03.pdf} } @article { author = {Gharagozlou, M. and Naghibi, S.}, title = {Sol–Gel Based Liquid-Mix Method for the Synthesis of Znfe2O4 Spinel}, journal = {Progress in Color, Colorants and Coatings}, volume = {14}, number = {2}, pages = {139-147}, year = {2021}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2021.81689}, abstract = {The superparamagnetic ZnFe2O4 (ZFO) powder with spinel structure was synthesized by a sol–gel based liquid-mix method using deionized water, citric acid, iron nitrate, zinc nitrate, and propylene glycol. Based on the principles of the Pechini method, the obtained solutions were treated under reflux at 95 °C followed by drying to obtain the desired powder. Simultaneous thermal analysis (STA) showed that there are three main thermal events at 165, 300, and 800 °C, which are related to the evaporation of water and/or volatile chemicals, combustion of organic materials, and chemical reactions to form ZFO phase, respectively. Among different calcination temperatures, thermal treatment at 900 °C led to the formation of a powder which its XRD pattern is well-matched with the ZFO standard peaks. Scanning electron microscopy (SEM) showed that calcination at 400-600 °C led to some agglomerated sediment particles in the range of 50-100 nm, whereas the morphologies of the samples calcined at 700-900 °C consisted of some fused particles with larger size (~1 μm). The vibrating sample magnetometer (VSM) results approved that although magnetization saturation (Ms) values were negligible in the samples calcined at lower temperatures (low–temperature samples), Ms value of the sample calcined at 900 °C was about ±7.5 emu/g. On the other hand, the S-shaped hysteresis curves of the high-temperature samples (calcined at 700-900 °C) and consequently zero/near-zero value for the coercivity (Hc) and remanence (Mr) parameters confirmed the superparamagnetic behavior of the as-synthesized ZFO compound. }, keywords = {ZnFe2O4 spinel,superparamagnetic behavior,sol–gel based liquid-mix method,XRD,VSM}, url = {https://pccc.icrc.ac.ir/article_81689.html}, eprint = {https://pccc.icrc.ac.ir/article_81689_08a96fe7e58d8ffb7dfbdb7b57a5ef33.pdf} }