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Formation of Salty Materials on Granite Surface by Environmental Pollutants - Effects of TiO2 -

환경오염물질에 의한 화강암 표면에서의 염의 생성에 관한 연구 - TiO2의 영향을 중심으로 -

  • Received : 2010.02.16
  • Accepted : 2010.05.13
  • Published : 2010.05.31

Abstract

Because the stone cultural properties located outdoors, they have been altered and deteriorated in external appearance due to environmental factors such as acid rain, extreme change in temperature, and salts. Damage to stone cultural properties is accelerated particularly due to recent industrial development and environmental pollution. An experimental study was conducted to evaluate the effect of environmental contaminants(sea water and air pollutants such as, $SO_2$, NO, $CO_2$) on the weathering of granite. And as part of the developing of conservation method, $TiO_2$ catalyst was prepared and tested. After expose a granite to sea water and air pollutants, the mineral compositions of the tested granite surface were lower then that of the fresh granite. And absorption capacity of the weathered granite was steadily increased. From these results, it was expected that granite could be weathered by sea water and air pollutants. For the $TiO_2$ coated granite, absorption capacity was slightly enhanced compared to the $TiO_2$ non-coated granite. Therefore, the $TiO_2$ coating method tested in this study considered to be a viable method to assist in the conservation of granite from environmental contaminants.

Acknowledgement

Supported by : 한서대학교

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