Twofold role of calcined hydrotalcites in the degradation of methyl parathion pesticide

Beilstein Journal of Nanotechnology

Geolar Fetter¹  Alvaro Sampieri²  Pedro Bosch³  Adriana Tejeda-Cruz³  María Elena Villafuerte-Castrejon³ 

[1] Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Químicas, Av. San Claudio, Ciudad Universitaria, 72570, Puebla, PUE, Mexico;Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Av. San Claudio, Ciudad Universitaria, 72570, Puebla, PUE, Mexico. Phone: [phone] ext. 7250;Universidad Nacional Autónoma de México, Instituto de Investigaciones en Materiales, A.P. 70360, Ciudad Universitaria, 04510 México, D.F., Mexico;

关键词: basicity;    hydrotalcite;    methyl parathion degradation;    mixed oxide;    organophosphate;    pesticide;    water pollution;   

DOI  :  10.3762/bjnano.2.11

来源: DOAJ

【 摘 要 】

Methyl parathion (MP) is a very toxic organophosphate pesticide used as a non-systematic insecticide and acaricide on many corps. As MP and its by-products are highly toxic, they have to be retained to avoid pollution of rivers and lakes. Highly efficient sorbents are hydrotalcites (HTs) (or anionic clays). We have correlated the degradation of an aqueous solution of MP at room temperature, with the basicity of the adsorbing materials. It was found that the metal composition of hydrotalcites determines both the surface electronic properties (basic or acidic) and the sorption capacity. Depending on the basic strength, some calcined hydrotalcites can catalyze the transformation of MP to p-nitrophenol (p-NP) and retain its by-products. Such a process has the advantage of being able to be carried out at room temperature and at the pH of the pesticide solution.

【 授权许可】

Unknown