| .泰乐菌素对菲在蒙脱石上吸附作用的影响[J].农业环境科学学报,2013,32(4):. |
| 泰乐菌素对菲在蒙脱石上吸附作用的影响 |
| Influences of Tylosin on Adsorption of Phenanthrene on Montmorillonite |
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| DOI：10.11654/jaes.2013.04.011 |
| 中文关键词: 泰乐菌素 菲 蒙脱石 协同吸附 土壤有机质 |
| 英文关键词: tylosin phenanthrene montmorillonite synergistic sorption soil organic matters |
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| 摘要点击次数: 1813 |
| 全文下载次数: 1918 |
| 中文摘要: |
| 在长期施用养殖粪肥的农田土壤中，抗生素药物往往与其他有机污染物共存，使各自在土壤中的迁移转化和生态效应变得更为复杂。采用批量振荡吸附平衡法，研究了在泰乐菌素存在的条件下蒙脱石对菲的吸附特性。结果表明：蒙脱石对泰乐菌素有较强的吸附能力，吸附容量可以达到250 mg·g-1，泰乐菌素能进入蒙脱石层间，使蒙脱石的层间距由1.17 nm增大到1.28 nm；泰乐菌素存在的条件下，蒙脱石对菲的吸附能力显著增强，当泰乐菌素的初始浓度从0增加到100 mg·L-1时，菲在蒙脱石上的吸附容量系数lgKf值从-4.047增加到0.591，lgKf值与矿物上有机碳含量呈正相关，这可能是由于已吸附的泰乐菌素可发挥类似“土壤有机质”的作用，促进蒙脱石对菲的吸附。菲在蒙脱石上的吸附容量和吸附的非线性程度随泰乐菌素初始浓度的增加而增加，由此推测，泰乐菌素与菲之间的疏水性作用是菲在矿物上吸附的主要作用方式。在评估抗生素药物和疏水性有机物复合污染的环境风险时，需要考虑到共存污染物的协同吸附作用。 |
| 英文摘要: |
| Antibiotics usually coexisted with other organic pollutants in long-term manure irrigated farm soil, which lead to the complicated transportation and transformation behaviors and ecological effects of these chemicals in the environment. Batch shock adsorption equilibrium method was used to investigate the adsorption properties of phenanthrene on clay mineral accompanied with tylosin. The results showed that tylosin exhibited strong adsorption capacity on montmorillonite, and the adsorption capacity could reach 250 mg·g-1. Tylosin could enter the interlayer of montmorillonite and increase the interlayer space from 1.17 nm to 1.28 nm. The sorption of phenanthrene on the montmorillonite was enhanced by preadsorbed tylosin, when the initial concentration of tylosin increased from 0 to 100 mg·L-1. The adsorption capacity coefficient lgKf ranging from -4.047 to 0.591, lgKf was positively correlated with the organic carbon content in mineral, which might be due to the preadsorbed tylosin that could act as “soil organic matters”. The adsorption capacity and nonlinearity of phenanthrene on montmorillonite increased with the initial concentration of tylosin, indicating that the hydrophobic interaction between tylosin and phenanthrene might play a major role in phenanthrene adsorption on organic minerals. It should be considered the synergic adsorption of co-contaminants to assess the risk of antibiotic drugs and hydrophobic organic compound pollution in the environment. |
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