摘要
利用常用绿化树种的落叶作为吸附剂,处理含Cu2+的重金属模拟废水,研究了Cu2+的初始浓度、吸附剂用量和温度、pH等因素对吸附效果的影响,并进行了吸附等温式和动力学模型拟合.结果表明,Cu2+初始浓度由50mg/L增加到300mg/L时,对应的落叶最大吸附量由18.57mg/g增加到100.75 mg/g;pH由4增加到8时,Cu2+的平衡吸附量由30.2 mg/g增加到38.4 mg/g.针对不同的Cu2+初始浓度进行了Langmuir和Freundlich吸附等温式拟合,动力学研究进行了一级动力学和二级动力学模型拟合.结果表明落叶对Cu2+的吸附与Freundlich模型和二级动力学模型拟合度较好.
The defoliation was investigated as a novel biosorbent of heavy metal taking aqueous Cu2＋ solution as a model system. Different environmental effect factors such as initial Cu2＋ concentration, biosorbent dose and temperature were studied. The maximum absorption capacities 18.57-100.75 mg/g was obtained for initial Cu2. concentration from 50 mg/L to 300 mg/L. The amount of absorbed Cu2＋ at equilibrium increased from 30.2 mg/g to 38.4 mg/g with the pH increased from 4 to 8. The equilibrium data were tested using several isotherm models： Langmuir and Freundlieh isotherm equations all at different initial Cu2＋ concentration. The kinetic data were analyzed using various kinetic models： pseudo-first order equation and pseudo-second order equation. Pseudo-second order and Freundlieh isotherm were proved fit the absorption of Cu2＋ onto defoliation well.
出处
《济宁学院学报》
2013年第3期20-24,共5页
Journal of Jining University
