工业水处理 ›› 2020, Vol. 40 ›› Issue (2): 71-74. doi: 10.11894/iwt.2019-0007

• 试验研究 • 上一篇    下一篇

改性玉米秸秆对Cu2+吸附性能研究

张华丽(),齐若男,谢嵬旭,汪树生   

  1. 吉林农业大学生命科学学院, 吉林长春 130118
  • 收稿日期:2019-11-04 出版日期:2020-02-20 发布日期:2020-02-22
  • 作者简介:张华丽(1991-),硕士。电话:18946628201, E-mail:604963455@qq.com
  • 基金资助:
    吉林省教育厅基金项目(吉教科合字[2016]第181号);吉林省科技厅自然基金课题(20170101108JC)

Study on adsorption of Cu2+ by modified corn straw

Huali Zhang(),Ruonan Qi,Weixu Xie,Shusheng Wang   

  1. College of Life Sciences, Jilin Agricultural University, Changchun 130118, China
  • Received:2019-11-04 Online:2020-02-20 Published:2020-02-22
  • Supported by:
    吉林省教育厅基金项目(吉教科合字[2016]第181号);吉林省科技厅自然基金课题(20170101108JC)

摘要:

研究了NaOH、HNO3改性玉米秸秆对水中Cu2+的吸附性能及吸附特性。研究表明,改性后的秸秆表面光滑,结晶指数高,对Cu2+的吸附容量增大。相比未改性玉米秸秆和酸改性玉米秸秆,碱改性玉米秸秆对Cu2+的吸附效果最好。碱改性玉米秸秆对Cu2+的吸附能较好地符合Freundlich方程和伪二级动力学模型。初步推断吸附机理是秸秆表面官能团与Cu2+络合形成复合体的化学吸附过程。

关键词: 玉米秸秆, 改性, 吸附, Cu2+

Abstract:

The adsorption performance and its characteristics of NaOH and HNO3 modified corn straws on Cu2+ in water were studied. The research showed that the surface of the modified straws was smooth, the crystalline index was high, and the adsorption capacity on Cu2+ was increased. Alkali-modified corn straw had the best adsorption performance on Cu2+, compared with unmodified corn straw and acid-modified corn straw. The adsorption on Cu2+ by alkalimodified corn straw was in good agreements with the Freundlich equation and the pseudo-second-order kinetic model. It was preliminarily inferred that the adsorption mechanism was the chemical adsorption process, in which the surface functional groups of the straw were chelated with Cu2+ to form complexes.

Key words: corn straw, modification, adsorption, Cu2+

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