|タイトル ||:||Effective utilization of combustion waste for water quality improvement in closed water body|
|著者 ||:||KIGATA, Kenta / KOMINE, Hideo / YASUHARA, Kazuya / MURAKAMI, Satoshi / INOUE, Yasuhiro / IDA, Naoto|
|要約(Abstract) ||:||In Japan, there are several lakes, marshes and ponds in a park known as the closed water body. Water
pollution consisting of increased nutrient salts such as phosphorus has become a big problem in the closed water body,
causing water quality deterioration thereby posing great threats to the environment.
In contrast, combustion waste such as coal fly ash and melted slag has been increasing with increase in coal-fired power
plant and melted plant, hence it is necessary to utilize the combustion waste. Therefore, it is expected that the effective
utilization of these combustion wastes should be expanded. Some combustion wastes have the effect of phosphorus
adsorption, and were indicated to contribute to the improvement of water quality.
This study conducted three kinds of tests including soaking test, column leaching test and large scale soaking test
simulating a lake using coal fly ash and melted slag as adsorption materials with the aim of verifying the effect of
phosphorus adsorption to those materials. The study verified the effect of phosphorus adsorption to coal fly ash and
melted slag. It is anticipated that combustion wastes would be utilized as phosphorus adsorption material for the
improvement in water quality.|