摘要
采用震荡平衡法,研究了重庆市2种主要农业土壤-矿子黄泥和灰棕紫泥,对润滑油类三庚酸三甲醇丙烷酯的动态吸附特征.吸附动力学试验结果表明矿子黄泥和灰棕紫泥对三庚酸三甲醇丙烷酯的吸附是一个快速过程,前20 min内吸附量分别达到最大吸附量的75.61%和69.37%,之后吸附速度逐渐减缓,40 min左右基本达到吸附反应平衡.采用Freundlich和Langmuir方程拟合等温吸附曲线,比较结果发现,Langmuir方程拟合效果较好,表明矿子黄泥和灰棕紫泥2种土壤对三庚酸三甲醇丙烷酯的吸附规律符合Langmuir吸附规律,其对该类润滑油酯的最大吸附量分别为12.99 mg/g和17.45 mg/g.
The adsorption properties of trimethylolpropane tri-heptylate on two types of agricultural soils in Chongqing （mineral flavicant soil and gray-brown purple） were investigated by batch adsorption experi-ment. Adsorption kinetics experiment showed that the adsorption in them was a fast process, 75.61% and 69.37% of the maximum adsorption in the two soils were completed in the first twenty minutes, respec-tively, followed by a gradual decline, and an equilibrium was eventually reached in about 40 minutes. The isothermal adsorption data were fitted by both Freundlich equation and Langmuir equation and the results showed that Langmuir equation described the adsorption characteristics better than the Freundlich equation. The maximum adsorption capacities were obtained from the Langmuir equation, which were 12.99 mg/g and 17.45 mg/g resnectiwly for flavicant soil and gray-brown purple soil.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第3期96-100,共5页
Journal of Southwest University(Natural Science Edition)
基金
重庆市科委攻关资助项目(6683)
西南大学发展基金项目资助
关键词
三庚酸三甲醇丙烷酯
吸附
矿子黄泥
灰棕紫泥
trimethylolpropane tri-heptylate
adsorption~ mineral flavicant soil
gray-brown purple soil
