阿蘇火山灰土によるリン酸及びアンモニウムイオンの吸着と地下水のイオン組成への影響

概要

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Physical properties were examined about Aso volcanic ash soil which is considered to be the origin of Kuroboku soil in Kumamoto prefecture. It is revealed that the volcanic ash soil is low in Al_2O_3 ratio which means its capability of becoming "active Al", and is large in pore size and small in specific surface area. The adsorption of ammonium and phosphate ions on the Aso volcanic ash soil and accompanying elution of constituent elements were examined by passing a NH_4H_2PO_4 solution (1-3300μg/ml) through a column (10 cm diameter and 75 cm long) of the soil sample. The adsorbed amounts of NH_4^+ and PO_4^<3-> were 0.042 and 0.688 mg/g, respectively. Na^+, K^+, Ca^<2+>, Mg^<2+>, and SO_4^<2-> were eluted from the ash soil were observed during the adsorption reaction by use of 1μg/ml of the NH_4H_2PO_4 solution.
公益社団法人日本薬学会の論文
1998-10-31