| 己唑醇在土壤中的吸附-解吸特性 |
| |
| 引用本文： | 韩玲娟,宋稳成,王鸣华.己唑醇在土壤中的吸附-解吸特性[J].环境化学,2012,31(3):367-371. |
| |
| 作者姓名： | 韩玲娟 宋稳成 王鸣华 |
| |
| 作者单位： | 1. 南京农业大学植物保护学院,南京,210095
2. 农业部农药检定所,北京,100026 |
| |
| 摘 要： | 采用批量平衡法和气相色谱法研究了己唑醇在3种土壤中的吸附-解吸特性.结果表明,己唑醇在3种供试土壤中的等温吸附-解吸曲线能较好地符合Freundlich模型,其吸附常数(Kf)分别为0.791、2.274和43.800,显示3种土壤吸附行为存在较大差异.吸附率与土壤有机质含量(OM)、土壤阳离子交换量(CEC)和粘粒含量呈良好相关性.己唑醇在粘土和壤土中的等温吸附线属于L型等温吸附线,砂土中属S型.己唑醇在土壤中的吸附自由能为-5.186—-8.164 kJ.mol-1,表示吸附机理主要为物理吸附.
|
| 关 键 词： | 己唑醇 土壤 吸附-解吸 |
Adsorption-desorption characteristics of hexaconazole in soils |
| |
| HAN Lingjuan,SONG Wencheng,WANG Minghua.Adsorption-desorption characteristics of hexaconazole in soils[J].Environmental Chemistry,2012,31(3):367-371. |
| |
| Authors: | HAN Lingjuan SONG Wencheng WANG Minghua |
| |
| Institution: | 1 (1.College of Plant Protection,Nanjing Agricultural University,Nanjing,210095,China; 2.Institute for the Control of Agrochemicals,Ministry of Agriculture,Beijing,100026,China) |
| |
| Abstract: | The adsorption-desorption characteristics of hexaconazole in three different types of soils were studied by batch equilibrium experiment and gas chromatography.The results showed that the adsorption-desorption isotherms of hexaconazole were perfectly fitted to Freundlich model.Significant different adsorption behaviors of hexaconazole were observed in the three types of tested soils,with the adsorption constants being 0.791,2.274 and 43.800.Moreover,the adsorption rate was in good correlation with OM,CEC and clay of the soil.Adsorption isotherm of hexaconazole exhibited L-type isotherm in clay and loam and S-type isotherm in sand.The free energy of sorption ranged from-5.186 to-8.164 kJ·mol-1,indicating that the adsorption could be physical in nature. |
| |
| Keywords: | hexaconazole soil adsorption-desorption |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
