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首页> 外文期刊>International Journal of Environmental Science and Technology >Adsorption of Cd ions from aqueous solutions by iron modified pomegranate peel carbons: kinetic and thermodynamic studies
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Adsorption of Cd ions from aqueous solutions by iron modified pomegranate peel carbons: kinetic and thermodynamic studies

机译：铁修饰的石榴皮碳从水溶液中吸附镉离子的动力学和热力学研究

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摘要

The experimental conditions for preparation of pomegranate peel carbon and Fe(III) modified pomegranate peel carbon were studied. The effects of main experimental parameters on carbon preparation such as carbonization time, carbonization temperature and Fe(III) impregnation ratio in pomegranate peel were investigated. The prepared carbons in various conditions were characterized by consideration of the production yield, ash content, iodine number, pH of zero point charge and their ability for adsorption of methylene blue. After preparation of carbons, their efficiency for removal of Cd2+ species from aqueous solution was investigated. The effect of experimental parameters such as Cd2+ initial concentration, pH of solution and contact time was studied by batch adsorption experiments. The fitting of experimental data in thermodynamic isotherms matched the linear results with Langmuir and Freundlich isotherms. The adsorption capacity for Cd2+ species on Fe(III) modified pomegranate peel carbon was 22.72 mg/g and the adsorption kinetic presented the pseudo-second-order kinetic model.
机译：研究了制备石榴皮碳和Fe（III）改性石榴皮碳的实验条件。研究了石榴皮中主要实验参数对碳化的影响，如碳化时间，碳化温度和Fe（III）的浸渍率。通过考虑产量，灰分含量，碘值，零点电荷的pH值及其对亚甲基蓝的吸附能力，对在各种条件下制备的碳进行了表征。制备碳后，研究了它们从水溶液中去除Cd2 +物质的效率。通过分批吸附实验研究了Cd2 +初始浓度，溶液pH值和接触时间等实验参数的影响。热力学等温线中实验数据的拟合与Langmuir和Freundlich等温线的线性结果相匹配。 Fe（III）修饰的石榴皮碳对Cd2 +的吸附能力为22.72 mg / g，吸附动力学为拟二级动力学模型。

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