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何盈盈

副教授   硕士生导师

个人信息 更多+
  • 教师拼音名称: heyingying
  • 所在单位: 化学与化工学院
  • 学历: 博士研究生毕业
  • 性别: 女
  • 学位: 博士学位
  • 在职信息: 在职
  • 主要任职: 西安建筑科技大学化学专业教师
  • 其他任职: 硕士生导师

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Adsorption of a Typical Polycyclic Aromatic Hydrocarbon by Humic Substance in Water and the Effect of Coexisting Metal Ions

发布时间:2024-08-09
点击次数:
所属单位:
化学与化工学院
发表刊物:
Colloids and Surfaces A: Physicochemical and Engineering Aspects
关键字:
中文关键字:腐殖酸;多环芳烃;蒽;吸附;;π–π电子给体受体作用,英文关键字:Humic acid;Polycyclic aromatic hydrocarbon;Anthrac
摘要:
In order to gain understanding on the mechanism of adsorption of polycyclic aromatic carbons (PAHs) by humic substances, an experimental study was conducted using a commercial humic acid (HA) and several organics as model HA segments for investigating their interaction with anthracene. By FTIR and 3D fluorescence spectrometry, it was identified that the HA molecules were mainly composed of aromatic moieties with carboxyl and hydroxyl substitutes, as well as certain N-heteroaromatic rings. Using a series of anionic and nonionic resins, the HA was fractionated into 10 fractions each with distinct specific UV absorbance (UV254/TOC), carboxyl and hydroxyl contents, and apparent binding constant KOC. As a result, good correlative relationship was found between KOC and UV254/TOC, indicating that the affinity of the HA for anthracene would be mainly affected by its aromaticity. Detailed investigations were further conducted using selected aromatic acids and heterocyclic compounds as model HA segments for reaction with anthracene. Evident information was obtained by FTIR, UV difference spectra and fluorescence spectroscopy on the obvious π–π electron donor–acceptor (EDA) interaction between the planar aromatic π electron systems of the model segments and anthracene. The protonated N-heterocyclic ring was identified as a stronger π-acceptor than the benzene ring and would thus play important role for binding anthracene. LowerpHvalue and/or coexistence of certain divalent metal ions such as Cu2+ and Zn2+ tended to be more favorable for HA–anthracene binding due to the enhancement of the electron-withdrawal that would promote the π–π EDA interaction.
备注:
何盈盈
第一作者:
王晓昌,何盈盈
论文类型:
期刊论文
卷号:
卷:379
期号:
期:1~3
页面范围:
页:93~101
是否译文:
发表时间:
2011-04-01