Primerjava treh standardnih postopkov izpiranja aktivnih učinkovin iz impregniranega lesa : diplomsko delo - visokošolski strokovni študij

Drnovšek, Boris (author), Humar, Miha (mentor), Pohleven, Franc (reviewer)

Za lesne izdelke, ki so impregnirani z zaščitnim sredstvom in se uporabljajo na prostem, je zelo pomembno, da se aktivne učinkovine iz lesa ne izpirajo. Zato je fiksacija biocidov v les zelo pomemben del razvoja zaščitnih pripravkov. Za preverjanje učinkovitosti vezave se uporablja več standardnih in nestandardnih metod. Za testiranja smo uporabili 3 standardne metode: SIST ENV 1250-2, SIST EN 84 in priporočilo OECD. Smrekove vzorce smo impregnirali s 4 pripravki: vodno raztopino borove kisline, kombinacijo borove kisline in vodne emulzije montana voska, vodno raztopino bakrovega (II) sulfata in baker-etanolaminskim komercialnim pripravkom Silvanolin. Ne glede na uporabljeni postopek izpiranja, so se v vseh primerih najbolj izprale učinkovine iz vzorcev, prepojenih z borovo kislino; najmanj pa učinkovine iz vzorcev, impregniranih z baker-etanolaminskim pripravkom Silvanolin. Najbolj blagi postopek izpiranja je metoda OECD; največ biocidov pa se je izpralo s standardno metodo SIST EN 84.

• Language: Slovenian
• Keywords: les, izpiranje, vezava, borova kislina, bakrovi pripravki
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [B. Drnovšek]
• Year: 2010
• Number of pages: IX, 49 f.
• PID: 20.500.12556/RUL-533
• UDC: 630*841
• COBISS.SI-ID: 1819017
• Publication date in RUL: 11.07.2014

Secondary language

• Language: English
• Title: Comparison of active ingredients leaching from impregnated wood determined according to three standard leaching procedures : graduation thesis - higher professional studies

Abstract

When impregnated wood is used for outdoor applications, it is essential that the active ingredients do not leach from it. Therefore, the evaluation of fixation of active ingredients is an important part of the development of wood preservatives. For this purpose, numerous standard and non-standard methods are utilized. 3 standard methods: ENV 1250-2, EN 84 and OECD Recommendation were used, and applied on spruce wood impregnated with 4 products: water solution of boric acid, a combination of boric acid and montan wax water emulsion, an aqueous solution of copper (II) sulphate and copper-ethanolamine (commercial solution (Silvanolin). Apart from the leaching method utilized, leaching of boron from boric acid treated wood was the most prominent, and on the other hand copper at Silvanolin treated wood exhibited the best performance. The least aggressive leaching method is OECD method, however, the most aggressive is EN 84 one.

• Keywords: wood, protection, leaching, boric acid, copper based preservatives, fixation