List of Articles جذب سطحی

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  1 - Investigation of the ability for removal of methylene blue cationic dye in aqueous samples using synthetic polymers
  Marzieh Hasanzadeh Fariba Ostovar
  10.29252/.2.3.17
  In this research, the ability for removal of methylene blue cationic dye using Electro active polymers based on polypyrrole (PPy) and poly (3-methylthiophene) (P3MTh) in a batch system were studied. Sawdust (SD) was made from wood, after patching, as a holder for coatin More

  In this research, the ability for removal of methylene blue cationic dye using Electro active polymers based on polypyrrole (PPy) and poly (3-methylthiophene) (P3MTh) in a batch system were studied. Sawdust (SD) was made from wood, after patching, as a holder for coating polymers and Sodium Dodecyl Sulfate Anionic Surfactant (SDS) was used to modify the surface of the sawdust. The effects of some important parameters such as pH, initial concentration of dye and contact time were investigated. To evaluate the obtained data, adsorption isotherm curves (Langmuir and Freundlich) were used. The adsorption efficiency for methylene blue was maximized at alkaline pH. Adsorption capacity increased with increasing initial concentration and contact time. In all cases, the adsorption process complies with Langmuir isotherm and represents the homogeneous and single-layer process. Also, the adsorption capacity obtained in SD/PPy, SD /PPy / SDS and SD / P3MTh polymers were 59/52, 400 and 1000 mg/g, respectively. Based on the studies and the results obtained in this study, it was found that these polymer materials can effectively be used in waste dyes, such as textile industry, which they have the great environmental significance. Manuscript profile
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  2 - Evaluation of natural adsorbents in water and wastewater treatment
  Mohadeseh Tavakoli
  10.29252/.5.7.39
  With increasing industrial activities and discharging untreated wastewater which contains various environmental pollutants to aquatic environments, problems such as reducing the penetration of light, anaerobic conditions and complications such as allergies and cancer fo More

  With increasing industrial activities and discharging untreated wastewater which contains various environmental pollutants to aquatic environments, problems such as reducing the penetration of light, anaerobic conditions and complications such as allergies and cancer for humans and other living organisms will occur. Surface absorption is one of the most effective and efficient methods for the removal of environmental pollutants and among the common methods for treatment of wastewater, applying natural adsorbents are more efficient than the other methods and is more economic. Since there are many natural adsorbents in nature, they are very inexpensive, they are even free in some cases; adsorption of contaminants by these materials can be a suitable way to remove the toxic substances of contaminated water and industrial wastewater. In this paper, we study some of bioactive adsorbents in order to remove contamination from industrial wastewater. Manuscript profile
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  3 - Investigation of Congored dye removal from industrial waste water using adsorption method
  Mohadeseh Tavakoli niloofar Abedinzade
  10.29252/.4.6.55
  These 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 More

  These 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
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  4 - Investigation effect of pH, adsorbent dosage and initial concentration on lead adsorption of contaminated water by goethite and Hormoz Island ochre
   Mahmudy Gharaie  Mazaheri  Ahmadpour  Savabi سیده منیره  حسینی
  Adsorption is one of the effective and frugal methods that used for removal of toxic metals-such as lead- from wastewater. In this paper, effect of three parameters including pH, adsorbent dosage and initial concentration of lead has been studied by two inexpensive adso More

  Adsorption is one of the effective and frugal methods that used for removal of toxic metals-such as lead- from wastewater. In this paper, effect of three parameters including pH, adsorbent dosage and initial concentration of lead has been studied by two inexpensive adsorbents including natural goethite and Hormoz island ochre. The effect pH on lead adsorption by each of adsorbents shows that lead adsorption percent increase with pH increasing to 5%. On the other hand, experiments showed that with increasing adsorbent dosage, adsorption percent increase in both adsorbents. But ochre unlike goethite has high ability for lead adsorption even in adsorbent dose 2 g/L. Investigations showed that in high lead concentrations ochre toward goethite is more effective adsorbent for lead. So that ochre under condition with initial concentration 150 mg/L, ambient temperature (23.5◦C), pH=5, adsorbent dose 6g/L, reaction time 60 min and particle size smaller than 230 mesh removes 97.57% of lead. Goethite removes 78.53% of lead at the same condition. In this condition, maximum lead adsorption capacity for ochre and goethite is 24.39 and 19.63mg/g respectively. Initial concentration and adsorption percent shows direct relation for ochre, but reverse for goethite. Langmuir and Frundlich adsorption isotherms show that goethite follows Langmuir model with correlation coefficient of 0.995, but ochre almost follows both models of Langmuir and Frundlich. Manuscript profile
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  5 - Laboratory study of alteration in reservoir rock wettability for the prevention of asphaltene sediment formation using metal oxide Nano-particles
  abdolhamid ansari Sadegh Ameri
  One of the methods of harvesting oil reservoirs is the injection of nanoparticles. Nanoparticles increase oil recovery from reservoirs by changing wettability, reducing surface tension, reducing oil viscosity. Metallic nanoparticles (ceramic nanoparticles) have the high More

  One of the methods of harvesting oil reservoirs is the injection of nanoparticles. Nanoparticles increase oil recovery from reservoirs by changing wettability, reducing surface tension, reducing oil viscosity. Metallic nanoparticles (ceramic nanoparticles) have the highest application in increasing the absorption of reservoirs. In this research, changes in the contact levels of oil, water, and stone in the presence and absence of metal oxide nanoparticles have been investigated. The change in the rock's wettability has been analyzed in various concentrations of nanoparticles in the aqueous phase and the governing mechanism for changing the rock solidity in two metal oxide nanoparticles is presented. 4 nanoparticles used in this study are TiO2, NiO, Co3O4, Al2O3 The specimens were then measured by the DSA and the angles were measured and it was observed that the maximum gradient of the graph is related to nickel oxide followed by cobalt oxide and then titanium oxide and the lowest slope to aluminum oxide. In this respect, from this point of view, Nano particles are considered as NiO> Co3O4> TiO2> Al2O3, respectively. So the first suggestion is to select the most suitable nanoparticles of metal oxide, NiO, and for the second position Co3O4, the third and fourth choices are TiO and Al2O3, respectively. Manuscript profile
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  6 - Removal of lead with metallic organic nanostructures of iron and benzene tricarboxylate from aqueous solution
  reza alizadeh
  Heavy metals are not chemically degraded, in order to prevent the entry and accumulation of this toxic pollutant along with factory effluents into the environment, so far, different methods have been used, but finding new methods with more efficiency in this area is nec More

  Heavy metals are not chemically degraded, in order to prevent the entry and accumulation of this toxic pollutant along with factory effluents into the environment, so far, different methods have been used, but finding new methods with more efficiency in this area is necessary. In this research, a new class of compounds called organic metallic materials has been used to remove industrial effluent lead. These organic metallic materials contain iron and benzene tricarboxylate. To identify the characteristics of these materials, electron microscope images and Nitrogen adsorption and desorption isotherms has been used. To determine the optimal conditions for using these materials for lead removal from the effluent, the effect of parameters: time (10-120 min), the amount of adsorbent (0.2-0.5 mg/L), pH (3.5 -12.5) and temperature (10-75 ° C) were evaluated. The results show that the composition of MIL-100 (Fe) has a better performance than the other materials in this study and complete removal of lead was achieved with an initial concentration of 10 mg/l and an adsorbent dose of 0.25 mg / l, at a temperature of 50 ° C, pH =4.3 and contact time of 120 min. Other properties of this material in removal of industrial effluent lead such as magnetic properties, reusability in five consecutive periods, large surface area, low cost, high efficiency and easy to use, make it an ideal option for large-scale use. Manuscript profile