响应面法优化铁锰改性生物炭对Cd2+的吸附
DOI:
作者:
作者单位:

1.广西师范大学 环境与资源学院;2.广西师范大学

作者简介:

通讯作者:

中图分类号:

X522

基金项目:

国家自然科学基金项目(41301343)


Optimization of Cd2+ adsorption of Fe-Mn modified biochar by response surface methodology
Author:
Affiliation:

College of Environment and Resources, Guangxi Normal University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 文章评论
    摘要:

    以香蕉秸秆生物炭为基底,采用浸渍改性的方法,制备了一种铁锰负载生物炭用以吸附Cd2+。通过响应面法对改性生物炭制备条件进行优化,在最优制备条件下,铁锰改性生物炭对Cd2+的预测吸附量为235.64 mg·g-1,实际吸附量为221.03 mg·g-1,相对偏差为6.2%。SEM-EDS、XRD、FTIR分析结果表明,改性后的生物炭表面成功负载铁锰元素,经分析对Cd2+的吸附机理为离子交换、官能团络合、矿物沉淀和阳离子-π作用。铁锰改性生物炭对Cd2+的吸附符合Langmuir模型和准二级动力学模型,说明吸附过程是单分子层吸附和化学吸附。

    Abstract:

    Using banana straw biochar as the base, an iron-manganese loaded biochar was prepared by impregnation modification method to adsorb Cd2+. Response surface methodology was used to optimize the preparation conditions of modified biochar. Under the best preparation conditions, the predicted adsorption capacity of Fe-Mn modified biochar for Cd2+ was 235.64 mg·g-1, and the actual adsorption capacity was 221.03 mg·g-1, with a relative deviation of 6.2%. SEM-EDS, XRD and FTIR analysis showed that the modified biochar was successfully loaded with Fe and Mn. The main adsorption mechanisms for Cd2+ were ion exchange, complexation precipitation, mineral precipitation and cation -π interaction. The adsorption of Cd2+ by Fe-Mn modified biochar accords with Langmuir model and quasi-second-order kinetic equation, indicating that the adsorption process is monolayer adsorption and chemisorption.

    参考文献
    相似文献
    引证文献
引用本文

邓华,张俊渝,梁祖鸿,等. 响应面法优化铁锰改性生物炭对Cd2+的吸附[J]. 科学技术与工程, , ():

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-11-21
  • 最后修改日期:2022-03-30
  • 录用日期:2022-04-30
  • 在线发布日期:
  • 出版日期:
×
关于近期《科学技术与工程》编辑部居家办公的说明
亟待确认的版面费信息