background: the use of alternative disinfectants and the control of natural organic material are two approaches that are typically applied in water treatment utilities to reduce the formation of chlorinated disinfection by-products in recent years. catalytic ozonation as a new technology is used to promote the efficiency of the single ozonation processes. the purpose of this study was to invest...

Understanding the long- and short-term weathering features according to rock type is very important for maintaining original form of stone heritages. In this study, material characteristics a deteriorated five-story pagoda were compared with those fresh rocks from its quarrying site at nearby Geumgolsan Mountain, Korea, diagnose degree damage develop comprehensive interpretation mechanism. The ...