Adsorption of lead ions in aqueous solution using silica-alumina nanoparticles

被引：22

作者：

Medina, M. ^{[2
]}

Tapia, J. ^{[2
]}

Pacheco, S. ^{[3
]}

Espinosa, M. ^{[4
]}

Rodriguez, R. ^{[1
]}

机构：

[1] Campus UNAM, CFATA, Mexico City 76230, DF, Mexico

[2] UAM Azcapotzalco, DCBI, Mexico City 02200, DF, Mexico

[3] Inst Mexicano Petr, Mexico City 07730, DF, Mexico

[4] UAQ, Mexico City 7600, DF, Mexico

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2010年 / 356卷 / 6-8期

关键词：

Diffraction and scattering measurements; Rayleigh scattering; Nanoparticles; colloids and quantum structures; Colloids; Oxide glasses; Aluminosilicates; Sol-gel; aerogel and solution chemistry; Aerogels; Sol-gels (xerogels); Solution chemistry; Water; Hydration; REMOVAL;

D O I：

10.1016/j.jnoncrysol.2009.11.032

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The adsorption of lead ions in aqueous solution on the surface of silica-alumina nanoparticles is reported. The removal of lead ions from simulated industrial wastewater was performed using silica-alumina particles synthesized by the sol-gel method with a molar ratio of 1:1. Small amounts of lead ions were added to the Sol until the critical flocculation concentration was reached and the particles flocculated forming aggregates which sediment down, being removed from the sol. The flocculation kinetics was followed using Dynamic Light Scattering that measures the particle size as a function of time. The amount of lead ions adsorbed by the nanoparticles was determined using Atomic Absorption Spectroscopy. The lead concentration was reduced from 140 ppm to below 10 ppb; this final concentration fulfills the corresponding legislation requirements. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：383 / 387

页数：5

共 18 条

[1] TIME-DEPENDENCE OF PARTICLE-SIZE AND PARTICLE NUMBER OF SILICA SOLS UNDER REFLUX CONDITIONS [J].