alireza ziapour; zahra Kazemi Karchegini; negin Kazemi Karchegini
Abstract
The color of wastewater is considered as a major environmental problem. Chemical and biological treatment of dye containing wastewater is difficult due to the low adsorption level and chemical stability of dyes. Activated carbon is usually used for adsorption of these materials, but because of high prices ...
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The color of wastewater is considered as a major environmental problem. Chemical and biological treatment of dye containing wastewater is difficult due to the low adsorption level and chemical stability of dyes. Activated carbon is usually used for adsorption of these materials, but because of high prices and restore problems, researchers are trying to find available low-cost materials with high adsorption. In this research, soybean lignocellulosic waste has been investigated for absorption of Rimosol Black B (RBB) dye. First, the effect of dye RBB concentration, pH, temperature and contact time on the absorption value was investigated, and then the adherence of the adsorption isotherm to the Langmuir and Freundlich models was investigated. The results showed that the absorption efficiency depended strongly on pH and slightly on the temperature. The absorption rate of RBB dye with soybean residue is high and the absorption is complete in a short period of time. The results of the adsorption isotherm analysis showed that both models are suitable for describing the adsorption of RBB dye with soybean. The maximum absorption capacity of RBB dye by soybean waste was calculated 90.9 mg/g, which is more than some cheap absorbents studied and less than others such as rapeseed lignocellulosic waste.
Chemistry of wood
alireza ziapour; Abbas Zare
Abstract
Chemical and biological treatment of dye- containing wastewaters is difficult due to the low adsorption level and chemical stability of dyes. Activated carbon is usually used for adsorption of these materials, but because of high prices and restore problems, researchers trying to find available low-cost ...
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Chemical and biological treatment of dye- containing wastewaters is difficult due to the low adsorption level and chemical stability of dyes. Activated carbon is usually used for adsorption of these materials, but because of high prices and restore problems, researchers trying to find available low-cost materials with high adsorption. In this study, bagasse was used for adsorption of Remzol Black B dye and its capability was examined. Variables were concentration, temperature, pH and contact time, and the degree of adsorption was examined in different situations. Then, adsorption isotherm according to Langmuir and Freundlich models was investigated. The results showed that the adsorption efficiency depends more on pH of solution and less on temperature of the solution. Maximum adsorption of Remzol Black B dye by bagasse occurred in the first 15 minutes of contact. The study of adsorption isotherm showed that both models are suitable for description of adsorption of Remzol Black B dye by bagasse. Maximum adsorption of Remzol Black B dye by bagasse was calculated as 7.51 mg/g. Results of this study showed that bagasse could be used as a low-cost bio adsorbent for the adsorption of Remzol Black B from aqueous solution.
Chemical conversion
alireza ziapour; Abbas Zare; Mohammad Bakhshi
Abstract
Chemical and biological treatment of dye- containing wastewaters is difficult due to the low adsorption level and chemical stability of dyes. Activated carbon is usually used for adsorption of these materials, but because of high prices and restore problems, researchers trying to find available low-cost ...
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Chemical and biological treatment of dye- containing wastewaters is difficult due to the low adsorption level and chemical stability of dyes. Activated carbon is usually used for adsorption of these materials, but because of high prices and restore problems, researchers trying to find available low-cost materials with high adsorption. In this study, bagasse was used for adsorption of Acid Grange7 dye and its capability was examined. Variables were concentration, temperature, pH and contact time, and the degree of adsorption was examined in different situations. Then, adsorption isotherm according to Langmuir and Freundlich models was investigated. The results showed that the adsorption efficiency depends more on pH of solution and less on temperature of the solution. Maximum adsorption of Acid Orange7 dye by bagasse occurred in the first 15 minutes of contact. The study of adsorption isotherm showed that both models are suitable for description of adsorption of Acid Orange7 dye by bagasse. Maximum adsorption of Acid Orange7 dye by bagasse was calculated as 18.56 mg/g. Results of this study showed that bagasse could be used as a low-cost bio adsorbent for the adsorption of Acid Orange7 from aqueous solution.