Preparation of xanthated bentonite and its removal behavior for Pb(II) ions

被引：8

作者：

He, Y. F. ^{[1
]}

Li, F. R. ^{[1
]}

Wang, R. M. ^{[1
]}

Li, F. Y. ^{[1
]}

Wang, Y. ^{[1
]}

Zhang, Z. H. ^{[1
]}

机构：

[1] NW Normal Univ, Coll Chem & Chem Engn, Key Lab Ecoenvironm Related Polymer Mat, Key Lab Polymer Mat Gansu Prov,Minist Educ, Lanzhou 730070, Peoples R China

来源：

WATER SCIENCE AND TECHNOLOGY | 2010年 / 61卷 / 05期

关键词：

adsorbent of lead ion; adsorption mechanism; bentonite; modified bentonite; water-treatment; HEAVY-METALS; SIMULTANEOUS SORPTION; ADSORPTION; WATER; MONTMORILLONITE; COPPER; FLOCCULATION; ORGANOCLAYS; CD(II); CLAYS;

D O I：

10.2166/wst.2010.013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Xanthate was successfully grafted onto bentonite by a relatively simple solution reaction. The obtained xanthated bentonite (XBent) was characterized by FT-IR spectrophotometer, thermogravimetric analysis (TG), particle size analysis, x-ray diffraction (XRD) and scanning electron microscopy (SEM). XBent acting as a type of environmentally friendly adsorbent was applied to remove lead ions from aqueous solutions. The optimum conditions were as follows: [Pb2+] = 500 mg L-1, [XBent] = 2 g L-1, pH = 5.0; oscillating 60 min under 200 rpm at 25 degrees C. The removal rate of lead was up to 99.9%. It was found that the lead(II) ions-XBent adsorption isotherm model fitted well to the Freundlich isotherm. The adsorption mechanism was also investigated by SEM and XRD, which concluded that lead ions were complexed or chelated with XBent. XBent appears to have potential to be used later in water treatment as a type of inorganic polymer reagent.

引用

页码：1235 / 1243

页数：9

共 27 条

[1] Adsorption of heavy metals on Na-montmorillonite. Effect of pH and organic substances [J].