摘要
通过振荡平衡吸附试验研究了兽药喹乙醇在猪粪上的吸附特征并对其吸附机制和影响因素进行探讨。结果表明,喹乙醇能被猪粪吸附,吸附过程属于快速吸附,吸附等温线呈非线性,能用Freundlich模型很好地描述;被粪便吸附的喹乙醇易被雨水解吸,进入自然环境。粪便对喹乙醇的吸附受溶液pH值和离子强度的影响,随pH值增加粪便对喹乙醇的吸附增加,但碱性条件下有下降趋势。背景溶液离子强度增加,粪便对喹乙醇的吸附量下降。同等浓度的二价Ca2+离子背景下,粪便吸收的喹乙醇能力比一价Na+离子体系弱。猪粪对喹乙醇的吸附存在多种吸附机制,物理吸附对整个吸附的贡献较大。
The experiment was conducted to study the olaquindox on pig manure sorption characteristics and to investigate the sorption mechanism and influence factors. The results showed that olaquindox was rapidly adsorbed to manures and Freundlich model could describe preferably the olaquindox nonlinear sorption isotherms. The adsorbed olaquindox was easy to be desorbed by rain with desorption. The sorption of olaquindox on manure were affected by solution pH and ionic strength, the amount of adsorbed olaquindox on manure increased with an increase of pH value and decreased with an increase of ionic strength, and greater sorption effect in the Na^ ＋ systems than in the Ca^2 ＋ systems was observed. These results suggested that physical adsorption was the main contribution to the sorption of olaquindox on pig manure.
出处
《浙江农业学报》
CSCD
北大核心
2009年第2期96-100,共5页
Acta Agriculturae Zhejiangensis
基金
江苏省自然科学基金(BK2006163)
江苏省农业科学院后备人才基金(028046110608)
关键词
兽药喹乙醇
吸附
猪粪
影响因素
olaquindox
sorption
pig manure
influence factors
