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Open Access Article
1 - The Investigation of Ability to Degradation and Removal of Various Dyes Using Silver Colloidal Nanoparticles
Mohadeseh Tavakoli Fariba OstovarColors are one of the most important pollutants of water, and only one entry into the water can significantly reduce the quality of water. In addition, due to the synthetic origin and the presence of complex molecules in the structure of colors, the purification process MoreColors are one of the most important pollutants of water, and only one entry into the water can significantly reduce the quality of water. In addition, due to the synthetic origin and the presence of complex molecules in the structure of colors, the purification process is sometimes accompanied by some problems. Colloidal nanoparticles play an important role in technology, especially in the manufacture of glass and ceramics, and are used as a suitable method for cleaning pollutants in water and wastewater. In this study, a chemical regeneration method was used to synthesize colloidal silver nanoparticles. Then, to evaluate the efficiency of synthetic silver nanoparticles, several solutions of dye and pigments such as sulfur, azo, reactive, cationic and anionic dyes were prepared and synthetic material was used for degradation of different colors. Finally, the effect of this colloidal nanoparticle on each of them was studied and compared. The results showed that silver colloidal nanoparticles have the ability to degradation and removal of methyl orange and methyl red dyes from aqueous samples, and these nanoparticles can be used for treatment the water and wastewater containing these dyes. Manuscript profile -
Open Access Article
2 - A review of widely used industrial dyes and their removal methods from water and wastewater
Fariba Ostovar Marzieh HasanzadehIn recent years, the expansion of industries has led to increase industrial wastewater production and environmental pollution. Dyes materials are one of the most important pollutants in industrial wastewater. Today, dyes are widely used in various industries such as tex MoreIn recent years, the expansion of industries has led to increase industrial wastewater production and environmental pollution. Dyes materials are one of the most important pollutants in industrial wastewater. Today, dyes are widely used in various industries such as textile, paper, leather, printing, and cosmetics. Drainage of colored wastewater does not only affect the aesthetic aspect of the receiving water but also reduces the process of photosynthesis. Also, the colors and their intermediate products are toxic, carcinogenic and mutagenic for aquatic life. Most of these dyes cause skin allergies, dermatitis, and itching, and accelerate the incidence of cancer and mutation in humans. Therefore, industrial wastewaters containing dye need to be treated prior to discharge into the receiving environment. The purpose of this study was to provide a summary of the most important industrial dyes, the health and environmental effects of dyes as pollutants, and to describe the methods for their removal from water and wastewater. In this study, different dye removal methods such as biological, physical and surface adsorption methods were described and the best process for treatment of colored wastewater was introduced considering the economical cost. Manuscript profile -
Open Access Article
3 - Investigation of Congored dye removal from industrial waste water using adsorption method
Mohadeseh Tavakoli niloofar AbedinzadeThese days, the removal of various dyes from industrial wastewater has become an important concern. Synthetic dyes used in industries such as textiles are complex, toxic and mutant organic materials. Congored is also an acidic dye that is considered a high- risk source MoreThese days, the removal of various dyes from industrial wastewater has become an important concern. Synthetic dyes used in industries such as textiles are complex, toxic and mutant organic materials. Congored is also an acidic dye that is considered a high- risk source of contamination and threatens the lives of humans and other living organisms. Different methods, such as electrochemical, physical and biological processes, are used to remove organic pigment from aqueous samples. Adsorption is one of the most effective modern methods of industrial wastewater treatment, which is a relatively simple and inexpensive process that produces non- toxic and low- risk products. The purpose of this study is removing the Congored dye from aqueous solutions and reviewing the accomplished researches for remove it. Manuscript profile -
Open Access Article
4 - Removal of Methylene blue dye from water by using Fe-BTC
reza alizadehFe-BTC (benzene tricarboxylic) synthesized by ultrasonic irradiation as a novel photo catalyst was investigated for degradation of methylene blue (MB)by UV/ photo catalyst system. In this study, for the first time, a facile ultrasonic method was employed to prepare Fe-B MoreFe-BTC (benzene tricarboxylic) synthesized by ultrasonic irradiation as a novel photo catalyst was investigated for degradation of methylene blue (MB)by UV/ photo catalyst system. In this study, for the first time, a facile ultrasonic method was employed to prepare Fe-BTC. The effects of temperature (50 and 70 °C) and irradiation time (90 and 120 min) were investigated to get the optimum photo catalyst. The nanoparticles of the synthesized Fe-BTC obtained were smaller and more homogeneous than those previously reported. The synthesized Fe-BTC samples showed good photocatalytic performance. The Fe-BTC 70-120 sample has shown the highest photocatalytic activity. The enhanced photocatalytic performance was related to two important factors which are the inhibition of the recombination process of the charge carriers and also the increase in the total area of the photo catalyst. The kinetics of degradation in this study has followed Langmuir-Hinshelwood pseudo-first-order theory. The Fe-BTC70-120 sample due to smaller particles and lower electron-hole recombination showed the highest photocatalytic degradation. The results of the mechanism showed the reactivity of hydroxyl radical oxidation in methylene blue degradation. The stability test also showed the high stability of Fe-BTC70-120 sample for three cycles. Photocatalytic degradation of MB by Fe-BTC with high activity and recycling stability may provide a new choice for wastewater treatment Manuscript profile -
Open Access Article
5 - Spirulina, wastewater dye absorbent microalgae
Hanieh Mirbolooki fatemeh ghanbari Hooman HeraviDye is the first known pollutant in industrial wastewater, and its small amount is very undesirable in water. Most of the dyes contain complex organic molecules and are harmful to aquatic life and humans due to the presence of metals, aromatics and other compounds in th MoreDye is the first known pollutant in industrial wastewater, and its small amount is very undesirable in water. Most of the dyes contain complex organic molecules and are harmful to aquatic life and humans due to the presence of metals, aromatics and other compounds in their structure. Removing or reducing the amount of this pollutant entering the environment is essential, and biological absorption is one of these methods. The main purpose of this research is to investigate the removal of blue reactive textile dye by spirulina microalgae. In the process of conducting the research, the effect of variables such as contact time, injected algae dose and wastewater concentration was investigated on the dye removal process and the amount of absorption of the samples was measured by a spectrophotometer and the number of experiments was determined by the design expert software via response surface method (RSM) and the analysis of variance (ANOVA) statistical tool was used to analyze the obtained results. Based on the obtained results, in the optimal conditions of the experiment, the best percentage of dye removal by spirulina microalgae was 100% in contact time of 30 minutes with a dose of 10 ml of injected algae into wastewater with a color concentration of 50 mg/L. Therefore, the use of microalgae, in addition to being an inexpensive and easy-to-operate method for color removal from colored wastewater such as textile wastewater, it will be of interest to researchers as an environmentally friendly method to remove hard degradable pollutants. Manuscript profile
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