Adsorption-based Cationic Dyes using the Carbon Active Sugarcane Bagasse
Meysam Davoodabadi FarahaniSiti Rozaimah Sheikh AbdullahSoraya HosseiniShahed ShojaeipourMehdi Kashisaz
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The use of activated carbon made of sugarcane bagasse, to eliminate cationic dyes present in waste water was studied in this research. It investigates the potential use of activated carbon made of sugarcane bagasse. Increase in the PH of the dye solution caused an equivalent increment in its adsorption efficiency. This study demonstrates that activated carbon made from sugarcane bagasse is an efficient and cheap adsorbing agent and very effective at removing dyes present in solutions and the possibility of using it for a simple and inexpensive method of dye removal from waste waters in either stirred tank reactors or in batch reactors. The data obtained could be utilised to design an optimally productive system that uses either stirred tank reactors or batch reactors remove of cationic dyes from effluents industrial. This study predicts effect of activated carbon made from sugarcane bagasse on adsorption of cationic dyes.Keywords:
Bagasse
Cationic polymerization
Carbon fibers
The use of activated carbon made of sugarcane bagasse, to eliminate cationic dyes present in waste water was studied in this research. It investigates the potential use of activated carbon made of sugarcane bagasse. Increase in the PH of the dye solution caused an equivalent increment in its adsorption efficiency. This study demonstrates that activated carbon made from sugarcane bagasse is an efficient and cheap adsorbing agent and very effective at removing dyes present in solutions and the possibility of using it for a simple and inexpensive method of dye removal from waste waters in either stirred tank reactors or in batch reactors. The data obtained could be utilised to design an optimally productive system that uses either stirred tank reactors or batch reactors remove of cationic dyes from effluents industrial. This study predicts effect of activated carbon made from sugarcane bagasse on adsorption of cationic dyes.
Bagasse
Cationic polymerization
Carbon fibers
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The adsorption of cationic and anionic dyes from aqueous solution by high surface area activated carbon prepared from grapevine rhytidome (as an abundant and low-cost bioresource precursor) was studied. The adsorption was studied from both kinetic and equilibrium point of view and the results were compared with the results of commercial granular activated carbon. Different kinetic and equilibrium models were used to analyze the experimental data. The adsorption capacity values were comparable for the prepared activated carbon and the commercial one. The results show that the low-cost prepared activated carbon can be effectively used for the removal of cationic and anionic dyes.
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This paper investigated the effect of cationic polymers(CTAC,MTAB and DTAB) on granular activated carbon(GAC) and Cr(VI) removal by these modified carbons.The purpose was to develop an adsorbent that could effectively remove Cr(VI).Adsorption balance tests were conducted to compare the adsorption capacities of virgin GAC and GACs modified to three cationic polymers.The results showed that cationic polymer modification was able to greatly improve carbon's adsorption for Cr(VI).In addition,CTAC modified GAC manifested higher capacities than MTAB and DTAB.The langmiur adsorption balance model and pseudo-second-order kinetics models were found to describe well the Cr(VI) adsorption behavior on activated carbon.Also,the stability of polymer on carbon was another important issue.Results indicated that polymer attached strongly to carbon surface and less than 3% of the polymer desorbed during Cr(VI) adsorption.
Cationic polymerization
Chromate conversion coating
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Polymer Adsorption
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The decolorization and advanced treatment of the washing and bleaching effluent of the pulp mill were carried out by integrative biological activated carbon device which cored on high-effective microorganisms. When influent CODCr was 149.99mg/L and colority was 34.30 times, enfluent CODCr was about 70mg/L and colority was about 15 times in pilot trial, both COD and colority removal rates achieved higher than 50%. 170d running experience indicated that biological activated carbon process can be used effectively for advanced treatment and decolorization of washing and bleaching effluent of the pulp mill.
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The phenomenon of water adsorption in microporous carbons is investigated using activated carbon fibers as the adsorbents. It is shown that the process of water adsorption is due to both physical adsorption and chemical interaction with surface groups. In accordance with this process, the filling of the micropores is shown to be progressive, the narrower micropores being filled first, and then water is adsorbed in the whole range of microporosity. This study confirms that water adsorbed in the porosity of the carbon has a solid-phase structure throughout the whole range of micropore size and, therefore, the density of adsorbed water has to be considered to be around 0.92 g cm-3.
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Adsorption of molasses effluent by activated carbon (AC) was investigated in this study. The effect of AC type on decolorization rates was compared and influential factors such absorbent doses, initial pH, adsorption time and temperature were evaluated. The results shows that the decolorization capacity is in the order of powered activated carbon (PAC) >; granular activated carbon (GAC) >; cylindrical activated carbon (CAC). The optimum dosage was 2 g/L for PAC and 20 g/L for GAC. The optimal operation parameters were set as: initial pH lower than 5, adsorption time in the range of 90-120 min and adsorption temperature lower than 40 oC Adsorption of molasses effluent using PAC and GAC fit Langmuir and Freundlich adsorption isotherms, respectively. The equilibrium adsorption capacity of organics present in the molasses effluent using PAC amounted to 300 mg/g.
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It has been widely recognized that dye removal by activated carbon adsorption is due to the surface action between the dye and the functional groups present in the surface of the carbon. An effective usage of the adsorbent necessitates a deeper understanding of the adsorption characteristics. The present study examined the use of modified activated carbon derived from the seeds of widely available plant source of Martynia annua L and Xanthiyam strumarium. A series of activated carbon samples were prepared by subjecting the materials to various chemical processes. The physico-chemical properties and sorption abilities were compared. Adsorption of commercially used dye materials of various concentrations were studied with prepared activated carbon samples from batch tests. These materials accrue superior properties and good adsorption behaviors. The adsorption capacities of four of the selected derived carbon samples were much greater than the capacities of the other carbon. The results reveal that the prepared activated carbon could be employed as a low cost alternative for decolorizing the coloring agents from waste water and industrial effluents.
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Adsorption equilibrium of cationic dye liquor on activated carbon fibers (ACF) is measured at t=20 ℃ and t=25 ℃ respectively.We have learned that real quantity of adsorptions are respectively 150 mg/g and 144 mg/g at t=20 ℃ and t=25 ℃ in terms of superfacial adsorption quantity.Adsorption equilibrium of Freundlich are qe=105ρe0.203 51 and qe=95ρe0.227 57.With different initial concentrations of cationic dye and quantity of ACF the corresponding batch dynamical curves of adsorption are determined.The adsorption dynamics of cationic dye liquor on ACF in fixed bed has been studied.
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