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卢媛, 罗沛, 孙红文. 纳米氧化铝对菲的吸附[J]. 环境化学, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
引用本文: 卢媛, 罗沛, 孙红文. 纳米氧化铝对菲的吸附[J]. 环境化学, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
shu
LU Yuan, LUO Pei, SUN Hongwen. Sorption of phenanthrene on Al2O3 nanoparticles[J]. Environmental Chemistry, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
Citation: LU Yuan, LUO Pei, SUN Hongwen. Sorption of phenanthrene on Al2O3 nanoparticles[J]. Environmental Chemistry, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
shu

纳米氧化铝对菲的吸附

  • 1.

    南开大学环境科学与工程学院, 环境污染过程与基准教育部重点实验室, 天津, 300071;

  • 2.

    中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室, 长沙, 410125

  • 基金项目:

    973项目（2014CB441104）资助.

Sorption of phenanthrene on Al2O3 nanoparticles

  • 1.

    Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China;

  • 2.

    Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China

  • Fund Project: Supported by Ministry of Science and Technology of China (2014CB441104).

  • 摘要: 为揭示菲在人工纳米氧化铝上的吸附行为及溶液化学条件对吸附的影响，采用批量平衡实验研究了两种纳米氧化铝对菲的吸附，并考察了pH、盐度和重金属离子（Ni2+）对吸附行为的影响.结果表明，两种纳米氧化铝对菲均具有一定的吸附能力，吸附数据可用Freundlich模型较好地拟合，lgKF值分别为1.15（α-Al2O3）和1.07（γ-Al2O3）.α-Al2O3对菲的吸附呈线性（n=0.96±0.03），其主要机制是菲在材料表面临近水层中的分配作用，而γ-Al2O3对菲的吸附表现出明显的非线性（n=1.19±0.01），其吸附过程除分配作用外，还可能存在孔填充机制；纳米氧化铝的团聚程度对两者的吸附行为也有影响.酸性和碱性条件下纳米氧化铝对菲的吸附均大于中性条件，在低pH条件下，纳米氧化铝与菲之间的静电吸引起主要作用，而在高pH下，纳米颗粒表面净电荷增加，团聚体的粒径减小，从而提供更多可利用的比表面积而促进吸附.盐度增加至32‰使两种纳米氧化铝的lgKF由1.15和1.07提高到1.60和2.12，这主要归因于盐析作用.Ni2+的存在对两种纳米氧化铝吸附菲也有促进作用，主要是纳米氧化铝表面电势增加和阳离子-π作用的结果.
    Abstract: In order to explore the sorption behavior of phenanthrene (PHE) on engineered Al2O3 nanoparticles (NPs) and the influence of solution chemistry on PHE sorption, batch experiments were conducted using α-Al2O3 and γ-Al2O3 NPs under different solution pH, salinity, and heavy metal ion (Ni2+) concentrations. The results indicated that these two types of Al2O3 NPs possessed sorption capability for PHE. The sorption data fit the Freundlich model well, with lgKF of 1.15 and 1.07 for α-Al2O3 NPs and γ-Al2O3 NPs, respectively. Sorption isotherm on α-Al2O3 NPs was linear (n=0.96±0.03), indicating PHE partitioning into the vicinal water layer of the sorbent; while PHE sorption on γ-Al2O3 NPs was nonlinear (n=1.19±0.01), possibly because of the involvment of pore filling besides partitioning mechanism. Sorption on the two NPs was also influenced by the extent NPs aggregation. Sorption under acid and basic conditions was higher than that under neutral condition. When pH was low, the electrostatic attraction dominated PHE sorption onto Al2O3 NPs. When pH was high, the net charge of NPs increased, resulting in less aggregation and greater available surface area of NPs. The lgKF increased from 1.15 to 1.60 (for α-Al2O3NPs) and 1.07 to 2.12 (for γ-Al2O3NPs) as the salinity increased to 32‰. This can be attributed to the salt-out effect. The coexistence of Ni2+ facilitated PHE sorption, which could be due to the increase of surface potential of Al2O3 NPs and the cation-π interaction.
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  • 收稿日期:  2018-05-31
  • 刊出日期:  2019-04-15
卢媛, 罗沛, 孙红文. 纳米氧化铝对菲的吸附[J]. 环境化学, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
引用本文: 卢媛, 罗沛, 孙红文. 纳米氧化铝对菲的吸附[J]. 环境化学, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
shu
LU Yuan, LUO Pei, SUN Hongwen. Sorption of phenanthrene on Al2O3 nanoparticles[J]. Environmental Chemistry, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
Citation: LU Yuan, LUO Pei, SUN Hongwen. Sorption of phenanthrene on Al2O3 nanoparticles[J]. Environmental Chemistry, 2019, 38(4): 822-831. doi: 10.7524/j.issn.0254-6108.2018053101
shu

纳米氧化铝对菲的吸附

  • 1.  南开大学环境科学与工程学院, 环境污染过程与基准教育部重点实验室, 天津, 300071;
  • 2.  中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室, 长沙, 410125
  • 收稿日期:  2018-05-31
基金项目:

973项目（2014CB441104）资助.

摘要: 为揭示菲在人工纳米氧化铝上的吸附行为及溶液化学条件对吸附的影响，采用批量平衡实验研究了两种纳米氧化铝对菲的吸附，并考察了pH、盐度和重金属离子（Ni2+）对吸附行为的影响.结果表明，两种纳米氧化铝对菲均具有一定的吸附能力，吸附数据可用Freundlich模型较好地拟合，lgKF值分别为1.15（α-Al2O3）和1.07（γ-Al2O3）.α-Al2O3对菲的吸附呈线性（n=0.96±0.03），其主要机制是菲在材料表面临近水层中的分配作用，而γ-Al2O3对菲的吸附表现出明显的非线性（n=1.19±0.01），其吸附过程除分配作用外，还可能存在孔填充机制；纳米氧化铝的团聚程度对两者的吸附行为也有影响.酸性和碱性条件下纳米氧化铝对菲的吸附均大于中性条件，在低pH条件下，纳米氧化铝与菲之间的静电吸引起主要作用，而在高pH下，纳米颗粒表面净电荷增加，团聚体的粒径减小，从而提供更多可利用的比表面积而促进吸附.盐度增加至32‰使两种纳米氧化铝的lgKF由1.15和1.07提高到1.60和2.12，这主要归因于盐析作用.Ni2+的存在对两种纳米氧化铝吸附菲也有促进作用，主要是纳米氧化铝表面电势增加和阳离子-π作用的结果.

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