Abstract
About 60% of the forest (approximately 2, 500ha) was damaged by generating a large amount of harmful volcanic gas (SO2) from the crater by the eruption in 2000 in Miyake-jima. Using a large amount of withered tree as “Not waste but environmental improvement materials (=charcoal)” contributes to an environmental reproduction and regional promotion of Miyake-jima. Moreover, this can contribute also to the exhaust reduction of CO2 by fixing the carbon. This study was performed to aim to collect various data for the development in the future, and checked the economy of the carbonization and toxicity, quality, production method etc.It was confirmed that heavy metal etc. doesn't contain about toxicity. As for quality, although specific gravity is small, the carbon content is 80% or more, and pore was more than the equal to charcoal on the market, and it was proved that adsorption performance was high. By this trial, the carbonization processing cost, toxicity, the quality, and the cost of making to the product, etc. become clear, and it will be used as basic data to make the Miyake-jima reproduction scheme in the future.
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