کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
607479 1454583 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Salt-enhanced removal of 2-ethyl-1-hexanol from aqueous solutions by adsorption on activated carbon
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Salt-enhanced removal of 2-ethyl-1-hexanol from aqueous solutions by adsorption on activated carbon
چکیده انگلیسی


• The adsorption performance of 2-ethyl-1-hexanol on activated carbon was investigated.
• The enhanced adsorption of EHA from brine water can be explained by salt-out effect.
• The EHA in brine water can be removed with better performance by dynamic adsorption.

2-Ethyl-1-hexanol has extensive industrial applications in solvent extraction, however, in view of its potential pollution to environment, the removal and recovery of 2-ethyl-1-hexanol is considered an essential step toward its sustainable use in the future. In this work, we report the removal of 2-ethyl-1-hexanol from aqueous solutions containing salts in high concentrations by adsorption on a coal-based activated carbon. Adsorption thermodynamics showed that the experimental isotherms were conformed well to the Langmuir equation. Also it was found that inorganic salts, i.e. MgCl2 and CaCl2 in high concentration significantly enhanced the adsorption capacity from 223 mg/g in the deionized water to 277 mg/g in a saline water. This phenomenon of adsorption enhancement could be ascribed to the salt-out effect. Kinetic analysis indicated that adsorption kinetics follows the pseudo-second-order equation and the adsorption rate constants increase with the salt concentration. The dynamic breakthrough volume and adsorbed amount of 2-ethyl-1-hexanol were significantly elevated when the salt is present in the water. The dynamic saturated adsorption amount increased from 218.3 mg/g in the deionized water to 309.5 mg/g in a salt lake brine. The Tomas model was well applied to predict the breakthrough curves and determine the characteristics parameters of the adsorption column.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 412, 15 December 2013, Pages 7–12
نویسندگان
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