Study of acids herbicides removal by calcined Mg-Al-CO3-LDH

被引：75

作者：

Cardoso, Lucelena Patricio ^{[1
]}

Valim, Joao Barros ^{[1
]}

机构：

[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Pret, Dept Chem, BR-14040901 Ribeirao Preto, SP, Brazil

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2006年 / 67卷 / 5-6期

基金：

巴西圣保罗研究基金会;

关键词：

inorganic compounds; organic compounds; surface properties;

D O I：

10.1016/j.jpcs.2006.01.015

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mg-Al-CO3-LDH is an anionic clay capable of removing anions from a solution by regenerating its layered structure. The mixed Mg,Al-oxide formed from calcined Mg-Al-CO3-LDH is a promising sorbent for organic anions. The aim of this work is to study the capacity of calcined Mg-Al-CO3-LDH to remove the acid herbicides 2,4-D, MCPA and Picloram from aqueous solution, as well as investigate the influence of pH on the regeneration process. To study this we looked into the kinetics of the regeneration process and being obtained the sorption isotherms of these anions on the clay. The regeneration process proved to be fast, the layered structure regenerated after contact of the calcined LDH with the anions solution for 15 min. Removal of the organic contaminants occurs mainly in first six hours. Intercalation of the organic anions showed to be dependent on their concentrations in solution. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：987 / 993

页数：7

共 20 条

[11] Preparation of a new stable hybrid material by chloride-2,4-dichlorophenoxyacetate ion exchange into the zinc-aluminium-chloride layered double hydroxide [J].