改性烟末生物质吸附剂的制备与表征
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

X712;X703.5

基金项目:

国家自然科学基金(21177053);南华大学研究生科研创新项目(2018KYY098)


Preparation and characterization of modified tobacco powder biomass adsorbent
Author:
Affiliation:

Fund Project:

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

    对烟末进行吡啶催化改性制备改性烟末生物质吸附剂(modified tobacco powder biomass adsorbent,MTPBA),为废弃生物质资源化综合利用及NO3-污染治理提供技术基础。通过条件实验,以MTPBA的直收率和2 mg/L的NO3-吸附率为指标,研究MTPBA制备过程中的主要参数条件的影响,确定制备MTPBA的适宜条件,并用扫描电子显微镜、能谱分析仪、傅里叶变换红外光谱仪等对烟末改性前后的物理化学特征进行表征分析。结果表明:制备MTPBA的适宜条件为强碱预处理的NaOH浓度为1.5 mol/L;交联反应时的温度为80℃;交联剂环氧氯丙烷的投加量为5 mL/g;叔胺化反应的温度为80℃;改性后生成的MTPBA形貌均一、结晶度增高,表面形成大量细小孔洞,并成功引入叔胺基团和氯烷基。研究表明:MTPBA比原始烟末具有更好的孔隙结构,引入的叔胺基团和氯烷基以及表面Zeta电位的变化均有利于吸附NO3-

    Abstract:

    Modification of tobacco powder by pyridine catalytic method obtained modified tobacco powder biomass adsorbent (MTPBA). This provides a technical basis for the comprehensive utilization of waste biomass resources and the management of NO3- contamination. Through the conditional experiments, taken MTPBA direct recover and NO3- adsorption rate of 2 mg/L as indicators, the influence of main parameter conditions in the preparation process of MTPBA was studied, and determined the suitable conditions for the preparation of MTPBA. The physicochemical characteristics of tobacco powder before and after modification were characterized by scanning electron microscopy, energy spectrum analyzer, Fourier transform infrared spectroscopy etc. The results show that the suitable conditions for preparing MTPBA are NaOH concentration of 1.5 mol/L during strong alkali pretreatment; the temperature of the crosslinking reaction is 80℃; the dosage of the crosslinking agent is 5 mL/g; the temperature of the quaternization reaction is 80℃. The formed MTPBA showed uniform morphology, increased crystallinity, formed a large number of fine pores on the surface, and successfully introduced tertiary amine groups and chloroalkyl groups. The results indicate that MTPBA has a better pore structure than the original tobacco powder, and the introduction of tertiary amine groups, chloroalkyl groups and surface zeta potential changes are favorable for adsorption of NO3-.

    参考文献
    相似文献
    引证文献
引用本文

康四军,杜思洁,杨金辉,杨斌,黎传书,骆毅,雷增江.改性烟末生物质吸附剂的制备与表征[J].土木与环境工程学报(中英文),2020,42(1):161-167.

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:2019-02-20
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-03-07
  • 出版日期: