Oshima Kazumasa, Kondo Hiromichi, Konishi Eriko, Yamamoto Tsuyoshi, Tsuge Yoshifumi, Watanabe Takayuki, Kishida Masahiro
Department of Chemical Engineering, Graduate School of Engineering, Kyushu University Motooka 744, Nishi-ku Fukuoka 819-0395 Japan
RSC Adv. 2022 Jun 7;12(26):16843-16846. doi: 10.1039/d2ra02537j. eCollection 2022 Jun 1.
To remove arsenite (As(iii)) from wastewater effectively, the catalytic oxidation of As(iii) to arsenate (As(v)) and As(v) precipitation with iron ions (Fe(iii)) was investigated. The Pt/SiO catalyst functioned as a reaction site for As(iii) with oxygen in the atmosphere. The combination of the Pt/SiO catalyst and Fe(iii) precipitant improved the removal of As(iii) in the precipitate; Pt/SiO worked as both an As(iii) oxidation site and precipitation site with Fe(iii) precipitant.
为了有效去除废水中的亚砷酸盐（As(iii)），研究了将As(iii)催化氧化为砷酸盐（As(v)）以及As(v)与铁离子（Fe(iii)）沉淀的过程。Pt/SiO催化剂作为As(iii)与大气中氧气的反应位点。Pt/SiO催化剂和Fe(iii)沉淀剂的组合提高了沉淀物中As(iii)的去除率；Pt/SiO既作为As(iii)的氧化位点，又作为与Fe(iii)沉淀剂的沉淀位点。
