HR: 0800h
AN: B41B-01 [Abstracts]
TI: Clay-Catalyzed Incorporation of Arsenic to Bioorganic Moities: A Low-Cost Mechanism for Ameliorating As toxicity Aquatic Systems.
AU: * Hernandez-Pined, J
EM: elocho.jhp@gmail.com
AF: Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Circuito Interior, Ciudad
Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: * Hernandez-Pined, J
EM: elocho.jhp@gmail.com
AF: Instituto de Geografia, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad
Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: Fernández-Lomelin, P
EM: pilarf@igg.unam.mx
AF: Instituto de Geografia, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad
Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: Lopez-Santiago, N
EM: ruth@igg.unam.mx
AF: Instituto de Geografia, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad
Universitaria, Coyoacan, Mexico City, 04510, Mexico
AU: Cervini-Silva, J
EM: jcervini@igg.unam.mx
AF: Instituto de Geografia, Universidad Nacional Autonoma de Mexico, Circuito Exterior, Ciudad
Universitaria, Coyoacan, Mexico City, 04510, Mexico
AB:
A method for ameliorating the toxicity of As has been developed. Succesive methylation of arsenic has been
reported to represent an important detoxification pathway in aquatic systems. Clays are natural porous materials
bearing high surface areas and interlayer spacing that allows entrapment of small-sized particles. Thus, clays
are natural nanomaterials that can serve as efficient catalysts in natural or engineered systems. In this paper we
study the kinetics of transformation of inorganic arsenic to arseno-organic complexes as affected by the following
clay samples: Montmorillonite [SWy-2] from Crook Country, Wyoming, USA, and Hectorite [SHCa-1] from San
Bernardino. Country, California, USA, and Nontronite [NG-1] from Australia. The effect of environmental factors,
arsenic inicial concentration and speciation is discussed.
DE: 0402 Agricultural systems
DE: 0409 Bioavailability: chemical speciation and complexation
DE: 0418 Bioremediation
DE: 0432 Contaminant and organic biogeochemistry (0792)
DE: 0448 Geomicrobiology
SC: Biogeosciences [B]
MN: 2007 Joint Assembly