Abstract:

The adsorption capacity of tobacco rods residues for Pb²⁺has been studied.The influences of adsorbent dosage, solution pH, adsorbing time and initial Pb²⁺concentration on the adsorption capacity of tobacco rods residues for Pb²⁺in aqueous solution are investigated, and the adsorption equilibrium data fitted.The experimental results show that tobacco rod residues have pretty good adsorption capacity for Pb²⁺.When Pb²⁺concentration is 50 mg/L, adsor-bent dosage 2 g/L, pH 5.5, and removing time 10 min, the removing rate of tobacco rob residues for Pb²⁺achieves 92.8%.The process of tobacco rod residues adsorption for Pb²⁺is in accordance with Langmuir isotherm adsorption.The adsorption of tobacco rod residues for Pb²⁺is mainly because of electrostatic attraction.The FT-IR results indicate that the functional groups of tobacco rob residues for adsorbing Pb²⁺are hydroxyl and carboxyl.

Key words: tobacco rob residues, Pb²⁺, adsorption, Zeta potential

摘要：

对烟柴杆废渣吸附Pb²⁺性能进行研究，考察了吸附剂用量、溶液pH、吸附时间和Pb²⁺初始浓度对烟柴杆废渣吸附水溶液中Pb²⁺的影响，并对吸附平衡数据进行了拟合。实验结果表明，烟柴杆废渣对Pb²⁺具有良好的吸附性能，在Pb²⁺质量浓度为50 mg/L，吸附剂质量浓度为2 g/L，pH为5.5，吸附时间为10 min条件下，烟柴杆废渣对Pb²⁺的去除率达到92.8%。烟柴杆废渣对Pb²⁺的吸附过程符合Langmuir等温吸附。烟柴杆废渣吸附Pb²⁺主要是由于静电引力，红外谱图分析表明，烟柴杆废渣吸附Pb²⁺的官能团主要为羟基和羧基等。

关键词: 烟柴杆废渣, Pb²⁺, 吸附, Zeta电位

CLC Number: 

• X703.1