高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (8): 1822.doi: 10.7503/cjcu20140186

• 高分子化学 • 上一篇    下一篇

木质素磺酸钠在氧化铁表面的吸附驱动力

周明松, 王文利, 杨东杰, 邱学青()   

  1. 华南理工大学化学与化工学院, 制浆造纸工程国家重点实验室, 广州 510640
  • 收稿日期:2014-03-06 出版日期:2014-08-10 发布日期:2014-07-04
  • 作者简介:联系人简介: 邱学青, 男, 博士, 教授, 博士生导师, 主要从事木质素资源化利用的应用基础研究. E-mail: cexqqiu@scut.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21006036, 21376100), 国家“九七三”计划项目(批准号: 2010CB732205)和广东省重大科技专项(批准号: 2012A080105012)资助

Adsorption Driving Force of Sodium Lignosulphonate on Fe2O3 Surface

ZHOU Mingsong, WANG Wenli, YANG Dongjie, QIU Xueqing*()   

  1. School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2014-03-06 Online:2014-08-10 Published:2014-07-04
  • Contact: QIU Xueqing E-mail:cexqqiu@scut.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21006036, 21376100), the Fundamental Research Funds for the Central Universities, China(No.2010CB732205) and the Science and Technology Major Projects of Guangdong Province of China(No.2012A080105012)

摘要:

研究吸附介质的pH值、 尿素及盐类对木质素磺酸钠(SL)在氧化铁表面吸附性能的影响规律, 结果表明, 络合能力较强的柠檬酸钠使SL的吸附量几乎减少至零, 较弱络合能力的亚硫酸钠使SL的吸附量具有一定程度的降低, 而无络合能力的硫酸钠增大了SL的吸附量. 说明SL的羧基与氧化铁之间的络合吸附驱动力对吸附起主导作用, 磺酸基对其在氧化铁上吸附的影响很弱. 采用氯化锂屏蔽部分羧基后SL在氧化铁上的吸附量也有所降低, 进一步证明了羧基与氧化铁表面的络合作用是其吸附的主要驱动力.

关键词: 木质素磺酸钠, 羧基, 吸附驱动力, 络合吸附, 氧化铁

Abstract:

The effect of the pH of adsorption medium, the urea and the salts on the adsorption property of sodium lignosulphonate(SL) on the surface of the ferric oxide particles was studied. The results showed that the sodium citrate with strongest complexing power maked the adsorption amount of SL on ferric oxide reduce to almost zero. The sodium sulfite with weak complexing power causes the adsorption amount of SL a certain reduction. The sodium sulfate with no complexing power causes the adsorption amount of SL a certain increase instead. It is concluded that the complex adsorption driving force between the carboxyl groups of SL and the ferric oxide plays a leading role in the adsorption process and the sulfonic groups of SL have very weak influence on the adsorption on the ferric oxide. The lithium chloride was used to mask most carboxyl groups of SL, and the adsorption amount of the masked SL on ferric oxide was reduced evidently. The results further proved that the complex force between the carboxyl groups of SL and the ferric oxide played the leading role in the adsorption process. In addition, the results showed that the electrostatic and hydrogen bond interaction between SL and ferric oxide had little influence on the adsorption.

Key words: Sodium lignosulphonate, Carboxyl group, Adsorption driving force, Complexing adsorption, Ferric oxide

中图分类号: 

TrendMD: