Abstract
Phosphorous adsorption concrete is a water purification material that is developed to remove the phosphorus in polluted water. It is main purpose of this research to establish the recycling use method of the phosphorous adsorption concrete, especially after finished using for water purification. Ordinary concrete, phosphorous adsorption concrete and phosphorous adsorption concrete mixed with natural zeolite were soaked in the river for certain periods. After brought out them from the river, the recycle uses as a seedbed and as a fertilizing material were examined into the experiments. Firstly, it was confirmed that the amount of bio-films attached to the phosphorous adsorption concrete clearly increased when soaked each specimen in actual river. Secondly, each specimen brought out from the river was verified as the seedbed and as the fertilizing material. As results, it was confirmed that phosphorous adsorption concrete had growth promotion effect for the vegetation. Furthermore, the phosphorous adsorption concrete mixed with natural zeolite showed increasing of the growth promotion effect by the cation exchange ability.
