Release and environmental impact of silver nanoparticles and conventional organic biocides from coated wooden fa莽ades
详细信息 查看全文
- 作者：Tina K眉nniger ; Andreas C. Gerecke ; Andrea Ulrich ; Anja Huch ; Roger Vonbank ; Markus Heeb ; Adrian Wichser ; Regula Haag ; Petra Kunz ; Markus Faller
- 关键词：Organic biocide ; Silver nanoparticle ; Wood coating ; Storm water runoff
- 刊名：Environmental Pollution
- 出版年：January, 2014
- 年：2014
- 卷：184
- 期：Complete
- 页码：464-471
- 全文大小：1600 K
文摘
This study represents for the first time a comprehensive assessment of functionality and environmental impacts of metallic silver nanoparticles (Ag-NP) compared to conventional organic biocides. Four different transparent, hydrophobic coatings of wooden outdoor fa莽ades were tested during one year outdoor weathering.
The total silver release from products with Ag-NP was proportional to the overall erosion of the coating. The results indicate that the Ag-NPs are likely transformed to silver complexes, which are considerably less toxic than ionic silver. The protective effect of the silver containing coatings against mold, blue stain and algae was insufficient, even in immaculate and non-weathered conditions. The release of organic biocides from conventional coatings was dependent on the weather conditions, the type of biocide and the use in the base or top coat. The conventional coating showed a good overall performance free from mold, blue stain and algae until the end of the test period.