Ensayo de preservación de madera tratada con Zn y Mn efectividad de tratamiento antilixiviante con bórax luego de cinco años de contacto con el suelo

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

A través de un ensayo de campo implementado de acuerdo a la norma EN 252, se evaluó la efectividad de tratamientos en etapas, tendientes a disminuir la lixiviación de una solución rica en Zn y Mn obtenida a partir de un proceso de reciclado aplicada en la madera por el método Bethell. La segunda etapa antilixiviante agregó bórax por pincelado o por el método Bethell. Se utilizó madera de Pinus taeda. Este trabajo presenta el análisis de la evolución del proceso de deterioro a lo largo de 5 años de ensayo de campo y su evaluación. Se utilizó el índice climático de Scheffer como método de evaluación del riesgo microbiológico en el sitio del ensayo y se realizó un análisis microscópico de la madera, para verificar el tipo de deterioro presente. Los tratamientos al 3% y al 6% en Zn con agregado de bórax por el método Bethell fueron los de mejor desempeño entre los evaluados a pesar de no haber superado el desempeño del preservante de referencia. Se observó la presencia de los tres tipos de pudrición, blanca, marrón y blanda tanto en controles sin tratamiento como en maderas tratadas, en un sitio con condiciones intermedias para el deterioro.

Translated abstract

The effectiveness of treatments in stages aimed at reducing the leaching of a solution rich in Zn and Mn obtained from a recycling process introduced into the wood by the Bethell method and a second stage in which borax was added by brushing and by the Bethell method, was evaluated through a field test. Pinus taeda wood was used according to EN 252 (1989). This paper presents an analysis of the evaluation and evolution of the process of deterioration over 5 years test. Scheffer climate index was used as a method of microbiological risk assessment at the site of the test and microscopic analysis of wood was carried out to verify the type of damage. Treatments 3% and 6% in Zn with borax added by the Bethell method were the top performers among the evaluated none of them performed better than the reference preserver. The presence of the three types of rot, white, brown and soft both on untreated controls and treated wood, in a site with intermediate conditions for microbial deterioration was observed.

Related collections

Most cited references 20

Record: found
Abstract: found
Article: not found

Elemental metals for environmental remediation: learning from cementation process.

C Noubactep (2010)

The further development of Fe(0)-based remediation technology depends on the profound understanding of the mechanisms involved in the process of aqueous contaminant removal. The view that adsorption and co-precipitation are the fundamental contaminant removal mechanisms is currently facing a harsh scepticism. Results from electrochemical cementation are used to bring new insights in the process of contaminant removal in Fe(0)/H(2)O systems. The common feature of hydrometallurgical cementation and metal-based remediation is the heterogeneous nature of the processes which inevitably occurs in the presence of a surface scale. The major difference between both processes is that the surface of remediation metals is covered by layers of own oxide(s) while the surface of the reducing metal in covered by porous layers of the cemented metal. The porous cemented metal is necessarily electronic conductive and favours further dissolution of the reducing metal. For the remediation metal, neither a porous layer nor a conductive layer could be warrant. Therefore, the continuation of the remediation process depends on the long-term porosity of oxide scales on the metal surfaces. These considerations rationalized the superiority of Fe(0) as remediation agent compared to thermodynamically more favourable Al(0) and Zn(0). The validity of the adsorption/co-precipitation concept is corroborated. Copyright 2010 Elsevier B.V. All rights reserved.