2015 年 25 巻 2 号 p. 95-100
To prevent groundwater pollution with NO3- from fertilizer and manure used in tea field, we evaluated the performance of anion exchange resins A-D by examining whether they adsorb NO3- in soil water from tea field using a soil column test. Anion exchange resin A, which gave the best results, was selected for the soil column test. Low concentrations of NO3- and SO42- were detected in eluates when 185 mL of NO3- aqueous solution was passed through a column packed with 30 g of soil from tea field and 10 g of anion exchange resin A. Similarly, low concentrations of NO3- and SO42- were detected in eluates when 185 mL of spring water from a catchment area of tea field was passed through a column.