Kazuya Tanaka, Keiko Yamaji, Hayato Masuya, Jumpei Tomita, Mayumi Ozawa, Shinya Yamasaki, Kohei Tokunaga, Kenjin Fukuyama, Yoshiyuki Ohara, Ibrahim Maamoun, Akiko Yamaguchi, Yoshio Takahashi, Naofumi Kozai, Bernd Grambow
Radioactivity of Ra isotopes in natural waters is of serious concern. Control of 226 Ra concentrations in tailings ponds, which store waste from U ore extraction processes, is an important issue in mill tailings management. In this study, we tested microbially formed Mn(IV) oxide as an adsorbent for removal of Ra in water treatment. Biogenic Mn(IV) oxide (BMO) was prepared using a Mn(II)-oxidizing fungus, Coprinopsis urticicola strain Mn-2. First, adsorption experiments of Sr and Ba, as surrogates for Ra, onto BMO were conducted in aqueous NaCl solution at pH 7...
March 28, 2024: Chemosphere