About KAWANO TOSHIO
About YOSHIMURA TAKAHIRO
About KAWAI MASAFUMI
About ISHIKAWA KATSUMI
About sanitary sewage
About Physical treatment of water
About Wastewater treatment of agricultural wastes
About Methylene blue
About メチレンブルー
About 溶液
About 天然岩石
About 汚濁物質
About 吸着能
About 推定