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首页> 外文期刊>Journal of Hazardous Materials >Studies on the adsorption of reactive brilliant red X-3B dye on organic and carbon aerogels
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Studies on the adsorption of reactive brilliant red X-3B dye on organic and carbon aerogels

机译：活性艳红X-3B染料在有机和碳气凝胶上的吸附研究

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Organic aerogels (AGs) and carbon aerogels (CAs) as adsorbents were successfully fabricated by a sol-gel polymerization method. The BET specific surface area and pore size distribution of the samples were analyzed by N_2 adsorption measurements. The adsorption efficiency of prepared samples towards reactive brilliant red X-3B dye (RBRX) was investigated. The adsorption of dye was found to follow the Langmuir and Freundlich models. The thermodynamic parameters, such as the change of free energy, enthalpy and entropy were calculated from equilibrium constants. Kinetic studies indicated that the adsorption of CA followed pseudo first and second order kinetic model, but the adsorption of AG only followed pseudo first order kinetic model. Batch adsorption studies were conducted to evaluate the effects of main preparation and adsorption conditions such as R/C (molar ratio of resorcinol (R) to surfactant (CTAB)) of adsorbent, pH, adsorbent dose and adsorbent particle size on the adsorption of RBRX on AG and CA. The results showed that the adsorption capacity of dye increased with the decrease in dose and particle size of the adsorbent. Maximum adsorption of AGs and CAs was observed at R/C = 200. The adsorption capacity of AG and CA would increase largely when pH < 4 or pH> 12.
机译：通过溶胶-凝胶聚合法成功制备了有机气凝胶（AGs）和碳气凝胶（CAs）作为吸附剂。通过N_2吸附测量分析样品的BET比表面积和孔径分布。研究了制备的样品对活性艳红X-3B染料（RBRX）的吸附效率。发现染料的吸附遵循Langmuir和Freundlich模型。由平衡常数计算出热力学参数，例如自由能，焓和熵的变化。动力学研究表明，CA的吸附遵循伪一阶和二阶动力学模型，而AG的吸附仅遵循伪一阶动力学模型。进行分批吸附研究以评估主要制备方法和吸附条件，例如吸附剂的R / C（间苯二酚（R）与表面活性剂（CTAB）的摩尔比），pH，吸附剂剂量和吸附剂粒径对RBRX吸附的影响在AG和CA上。结果表明，染料的吸附能力随吸附剂剂量和粒径的减小而增加。在R / C = 200时观察到AG和CA的最大吸附。当pH <4或pH> 12时，AG和CA的吸附能力将大大提高。

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