Abstract
Leaching tests are performed to test a specific quality or characteristics of waste matters, recycling materials or soils, in terms of leaching. Besides “compliance tests,” such as JLT13, leaching tests include various “characterization tests” which can reveal much more about the leaching property by changing the type of solvent used or the leaching operation. Overseas, a common approach has been applied in the standardization of leaching tests among different materials such as soil and waste. In Japan, there are several compliance tests defined by the government or by academic societies but it will now be necessary to advance the standardization of these characterization tests by referring to what is being done overseas.
Besides recently the Environmental Safety Quality Inspection Method was proposed by the Japanese Industrial Standardization Committee in order to utilize recycling materials such as slag and coal ash in a more beneficial way. The inspection method is composed of two steps : characterization tests are suited to the first step, Environmental Safety Quality-Type Inspection; and compliance tests are suited to the second step, Environmental Safety Quality Delivery Inspection. Appropriate leaching tests are designated to be assigned in each step.
