Nitrate removal using natural clays modified by acid thermoactivation

被引：69
|
作者：
Mena-Duran, C. J.
Kou, M. R. Sun
Lopez, T.
Azamar-Barrios, J. A.
Aguilar, D. H.
Dominguez, M. I.
Odriozola, J. A.
Quintana, P.
机构：
[1] CINVESTAV, Unidad Merida, Dept Appl Phys, Merida 97310, Yuc, Mexico
[2] Pontificia Univ Catolica Peru, Dept Ciencias, Secc Quim, Lima 100, Peru
[3] Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, Mexico
[4] Univ Seville, CSIC, Inst Ciencia Mat, Seville 41092, Spain
来源：
APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 13期
关键词：
nitrates; adsorption; montmorillonites; infrared spectroscopy; X-ray diffraction; BET;
D O I：
10.1016/j.apsusc.2006.12.103
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Groundwater pollution by nitrates is a widespread problem in many locations in the world. The underground aquatic mantle of the Peninsula of Yucatan is highly vulnerable due to its karstic nature. Adsorption methods are a good choice for nitrate elimination. In this work, a natural calcium bentonite was modified by acid thermoactivation with HCl and H2SO4, and tested as a media for nitrate removal in an aqueous solution. The nitrate concentration in the solution was measured by FT-IR, using the Lambert-Beer law. Clay characterization was carried out by X-ray diffraction and FT-IR spectroscopy; surface area was measured by the BET method. (c) 2007 Elsevier B.V All rights reserved.
引用
收藏
页码：5762 / 5766
页数：5
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