Thermally assisted hydrolysis and methylation of the black deposit coating the ceiling and walls of Cueva del Encajero, Quesada, Spain
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- 作者：Saiz-Jimenez ; C. ; Hermosin ; B.
- 关键词：Thermally assisted hydrolysis and methylation ; Pyrolysis ; Tetramethylammonium hydroxide ; Fatty acids ; Aliphatic dicarboxylic acids ; Phenolic acids ; Olive mill waste water ; Olive mill sludge
- 刊名：Journal of Analytical and Applied Pyrolysis
- 出版年：1999
- 出版时间：February, 1999
- 年：1999
- 卷：49
- 期：1-2
- 页码：349-357
- 全文大小：107 K
文摘
The black deposit coating the ceiling and walls of Cueva del Encajero, a cavity with rock art was investigated. Thermally assisted hydrolysis and methylation revealed that the material is mainly composed of methylated fatty acids, aliphatic dicarboxylic acids, benzenecarboxylic acids and phenolic acids. Their comparison with humic acid-like fractions from fresh olive mill waste waters and aged sludge obtained from an evaporation pond indicates that this material is totally compatible with a plant origin. It is suggested that the black deposit derives from the decomposition of olives from non harvested olive trees growing on the surface, above the cave.