天津工业大学学报2017，Vol.36Issue(2)：31-36,6.DOI:10.3969/j.issn.1671-024x.2017.02.006
Fe(Ⅱ)盐氧化絮凝对As(Ⅲ)和As(Ⅴ)的去除
Removal of As(Ⅲ) and As(Ⅴ) by ferrous salt oxidation flocculation
摘要
Abstract
In order to investigate the effect of ferrous salt oxidation flocculation on arsenic removal, using FeSO4·7H2O as oxidation flocculant, the effects of different concentrations of Fe (Ⅱ) and pH on arsenic removal were explored. The Fe(oxy) hydroxides under different pH were analyzed by TEM. The results showed that with the increasing of Fe(Ⅱ) content, the removal percentage of As(Ⅴ) increased, while the removal percentage of As(Ⅲ) decreased first and then increased. With the increasing of pH, the removal percentage of As(Ⅴ) and As(Ⅲ) both increased first and then decreased. On the conditions of As/Fe molar ratio of 0.5 and initial concentration of 0.5 mmol/L As (Ⅴ) and As(Ⅲ), the As(Ⅴ) was adsorbed and coprecipitated to form ferrihydrite and ferric arsenate formed at pH 9.0, and the removal percentage of As(Ⅴ) was 63.7%after 0.5 h;the As(Ⅲ) was coprecipitated and adsorbed to form ferric arsenate at pH 11.0, and the removal percentage of As(Ⅲ) was 75.7%after 0.5 h.关键词
Fe(Ⅱ)氧化絮凝/As(Ⅲ)去除/As(Ⅴ)去除/铁(羟基)氧化物Key words
ferrous salt oxidation flocculation/As(Ⅲ) removal/As(Ⅴ) removal/Fe(oxy)hydroxides分类
化学化工引用本文复制引用
韩煦,安学良,宋雅琴,陈澄,任海涛..Fe(Ⅱ)盐氧化絮凝对As(Ⅲ)和As(Ⅴ)的去除[J].天津工业大学学报,2017,36(2):31-36,6.基金项目
国家自然科学基金资助项目(41373114) （41373114）
天津市科技计划项目(15PTSYJC00230) （15PTSYJC00230）
