菠菜叶活性炭对碘的吸附特性研究

Q4 Chemistry

Mongolian Journal of Chemistry Pub Date : 2020-12-31 DOI:10.5564/mjc.v21i47.1249

P. Jha, V. Jha

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引用次数: 9

摘要

采用球果活化法对菠菜叶粉进行改性。采用红外光谱(FTIR)、光学显微镜、x射线衍射(XRD)分析和亚甲基蓝吸附法对H2SO4进行了表征。亚甲基蓝吸附法测得的最大比表面积为499 m2/g。考察了pH、吸附剂剂量、接触时间和I2浓度对碘的吸附作用。吸附过程符合拟二级动力学控制的Langmuir模型，速率恒定值为0.00305 g/(mg·min)。pH值为10时吸附量最大。最大吸附量为909.091 mg/g。∆G值为-25 kJ/mol，证实了物理化学吸附过程。

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Iodine adsorption characteristics of activated carbon obtained from Spinacia Oleracea (spinach) leaves

Spinach leaves powder was modified by activation with conc. H2SO4 and was characterized by using FTIR, optical microscopy, XRD analysis and methylene blue adsorption method. The maximum specific surface area measured by the Methylene blue adsorption method was 499 m2/g. The adsorption of iodine was investigated by varying parameters as pH, adsorbent dose, contact time and I2 concentration. The adsorption process was fitted to the Langmuir model controlled by pseudo - second – order kinetics with a constant rate value of 0.00305 g/(mg·min). The maximum adsorption was at pH 10. The maximum adsorption capacity was 909.091 mg/g. The ∆G value was -25 kJ/mole, which confirmed the physico - chemcal adsorption process.

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来源期刊

Mongolian Journal of Chemistry Materials Science-Materials Chemistry

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

20 weeks