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›› 2013, Vol. 13 ›› Issue (5): 817-820.

• 反应与分离 • 上一篇    下一篇

含硅碳羟基磷灰石的制备及其对锰离子的吸附性能

曾荣英 唐文清 张复兴 龚道新   

  1. 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 湖南农业大学资源环境学院
  • 收稿日期:2013-05-20 修回日期:2013-06-18 出版日期:2013-10-20 发布日期:2013-10-20
  • 通讯作者: 曾荣英

Preparation of Silicon-doped Carbonate Hydroxylapatite and Its Adsorption Properties to Manganese Ion

ZENG Rong-ying TANG Wen-qing ZHANG Fu-xing GONG Dao-xin   

  1. Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University College of Resources & Environment, Hunan Agricultural University
  • Received:2013-05-20 Revised:2013-06-18 Online:2013-10-20 Published:2013-10-20
  • Contact: ZENG Rong-ying

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摘要： 以废弃蛋壳为原料水热法合成含硅碳羟基磷灰石(Si-CHAP)粉体，采用红外光谱对其进行分析，测定不同温度下Mn2+在Si-CHAP粉体上的吸附等温线、吸附动力学曲线及热力学参数. 结果表明，Langmuir方程可较好地描述Mn2+在Si-CHAP粉体上的吸附平衡，20, 30和40℃下最大吸附容量分别为38.91, 41.49和43.10 mg/g；吸附动力学规律可用准二级动力学模型表示，相关系数高达0.99以上；热力学参数表明此吸附过程为自发吸热过程.

关键词: 含硅碳羟基磷灰石, Mn2+, 吸附, 动力学, 热力学

Abstract: Silicon-substituted carbonate hydroxylapatite (Si-CHAP) was successfully synthesized by hydrothermal method with abandoned eggshell as raw material, and characterized by FT-IR. Its adsorption equilibrium, kinetics and thermodynamics to Mn2+ were investigated under different temperatures. The results showed that the adsorption equilibrium well fitted to Langmuir equation, the maximum adsorption amount for Mn2+ onto Si-CHAP was 38.91 at 20, 41.49 at 30 and 43.10 mg/g at 40℃. The adsorption kinetics accorded with the pseudo second order kinetic equation with high correlation coefficient (R2>0.99). The thermodynamic parameters indicated that the adsorption was a spontaneous and endothermic process.

Key words: silicon-substituted carbonate hydroxylapatite, Mn2+, adsorption, kinetics, thermodynamics

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