中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (11): 1256-1259.DOI: 10.3724/SP.J.1095.2010.00033

• 研究论文 • 上一篇    下一篇

木麻黄树皮的原位固化制备及其对Cr（Ⅵ）的吸附

吴宗华*,陈少平,庞燕   

  1. (福建师范大学化学与材料学院 福州 350007)
  • 收稿日期:2010-01-13 修回日期:2010-04-15 出版日期:2010-11-10 发布日期:2010-11-10
  • 通讯作者: 吴宗华,男，教授; E-mail:wuzonhua@fjnu.edu.cn; 研究方向：高分子界面科学及森林生物物质深度加工
  • 基金资助:
    福建省教育厅科技资助项目（JB06078）

Preparation of in-situ Immobilized Casuarina Bark and Its Adsorption to Cr(Ⅳ)

WU Zong-Hua*, CHEN Shao-Ping, PANG Yan   

  1. (College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007)
  • Received:2010-01-13 Revised:2010-04-15 Published:2010-11-10 Online:2010-11-10

PDF

1156

被引次数

5

摘要：

通过醛与单宁等的反应使木麻黄树皮中单宁等组分原位固化，并考察了原位固化木麻黄树皮（YGMS）对稀水溶液中Cr(Ⅵ)的吸附行为。 研究结果表明，当m（甲醛）∶m（树皮）=1∶20、m（乙二醛）∶m（树皮）=1∶4和m（戊二醛）∶m（树皮）=3∶25时，固化树皮收率达到95%以上。 YGMS对Cr(Ⅵ)的吸附量随溶液pH值的增大而减小，溶液pH=2.01时吸附量最大。 随温度升高YGMS对Cr(Ⅵ)的吸附量增大。 用甲醛、乙二醛或戊二醛原位固化的木麻黄树皮对Cr(Ⅵ)的平衡吸附量分别为68.0、83.3和82.0 mg/g。 YGMS对Cr(Ⅵ)的平衡吸附量越大，其拟二级速率常数越小。

关键词: 木麻黄树皮, 原位固化, 吸附, Cr(Ⅵ)

Abstract:

Tannin in Casuarina equisetifolia bark was in-situ immobilized by reaction of aldehydes and tannin. The adsorption behavior of the in-situ immobilized modified bark to Cr(Ⅵ) in aqueous solution was investigated. The results showed that the recovery yields of the modified barks were higher than 95% when the mass ratios of the bark to fomaldehyde, glyoxal and glutraldehyde were 1∶20, 1∶4 and 3∶25, respectively. The maximal adsorption capacity of the bark to Cr(Ⅵ) was achieved at pH=2.01. The equilibrium adsorption capacity of the barks modified with fomaldehyde, glyoxal and glutraldehyde was 68.0 mg/g, 83.3 mg/g and 82.0 mg/g, respectively. The pseudosecondorder rate constant decreased with increases in the equilibrium adsorption capacity.

Key words: Casuarina equisetifolia bark, modification, adsorption, Cr (VI)

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