摘要
应用平衡吸附法,研究了不同投加量(改性玉米秸秆)、温度及pH条件下,改性玉米秸秆对水体中四环素的吸附作用,并利用等温曲线及吸附动力学方程对试验结果进行了拟合。结果表明:在吸附剂用量0.4g,温度30℃,振荡时间30min,pH值7的条件下,对水体中四环素浓度为50.136 mg/L的吸附率可达93.4%。四环素废水吸附均符合Langmuir及Freundlich等温模式,但Langmuir方程拟合得较好,Elovich方程能更好地拟合改性玉米秸秆对水体中四环素的吸附动力学曲线。
Equilibrium adsorption was applied to research adsorbing tetracycline （TTC） with modified corn stalks at conditions of different quantity of sorbent, temperature and pH. The resu/ts were fitted using isothermal curve and equation of adsorbent kinetics. It showed that at the conditions of 0. 4g-sorbent, 30℃-temperature, 30 min-oscillation time and pH 7, the adsorption rate of tetracycline with concentration of 50. 136 mg/L in water reached 93.4%. The absorption of tetracycline in wastewater coincided with the isotherm absorption of Langmuir and Freundlich, and the former fitted better. The Elovich equation can fit kinetic curves better for the adsorption of TIC in water using modified corn stalks.
出处
《四川环境》
2009年第5期12-15,18,共5页
Sichuan Environment
基金
重庆市科技攻关重点项目(CSTC2009AB7027)
关键词
改性玉米秸秆
四环素废水
吸附率
吸附动力学
Modified corn straw
tetracycline wastewater
adsorption rate
adsorption kinetics
