汚濁水中に含まれる重金属の林産廃棄物による除去 : 木粉および樹皮による除去

Removal of heavy metals from the polluted water by the use of forest products waste were studied. The forest products waste, wood flour or bark powder, were dipped in the river polluted by mining waste water. After dipping for about 19 hour, they were collected and the heavy metals taken up them were determined using atomic absorption spectrophotometer. Bark powder of Fraxinus spaethiana, for example, took up 19.0γ of cadmium per 1g of dried bark powder from the polluted water containing 0.03ppm of cadmium, and the powder of Zelkova serrata took up 472.0γ of copper per 1g of the powder from the water containing 0.12ppm of copper. These experimental results indicate the possibility of utilization of forest products waste to remove of heavy metals from the polluted water in spite of severe restriction to put into practical use.