The effect of the ferrihydrite dissolution/transformation process on mobility of arsenic in soils: Investigated by coupling a two-step sequential extraction with the diffusive gradient in the thin films (DGT) technique
作者: Tuo ZhangXibai ZengHao ZhangQimei LinShiming SuYanan WangLingyu BaiCuixia Wu
作者单位: 1Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China
2Lancaster Environment Centre, Lancaster University, LA1 4YQ, UK
3School of resource and environment, China Agriculture University, Beijing 100094, China
刊名: Geoderma, 2019, Vol.352 , pp.22-32
来源数据库: Elsevier Journal
DOI: 10.1016/j.geoderma.2019.05.042
关键词: FerrihydriteSoilsAsTransformation/dissolutionPHDGT
英文摘要: Abstract(#br)Ferrihydrite has been prevalently used in soil remediation as an effective amendment for in situ immobilization of arsenic (As). However, its poorly crystalline structure is unstable and can pose the risk of re-releasing As into soil. In this study, sequential extraction was coupled with a newly-established method, chelex-metsorb diffusive gradient in thin films (DGT), to study the ferrihydrite transformation/dissolution process and its effect on the mobility of arsenic in soil. Experiments in this work found that high soil moisture (70% SWHC) with a low soil redox potential (Eh) can significantly increase the rate of the ferrihydrite transformation/dissolution process compared to 30% SWHC. Soils with low pH and high available iron (Fe) content may also accelerate...
全文获取路径: Elsevier  (合作)
影响因子:2.345 (2012)

  • technique 技术
  • sequential 连续的
  • gradient 倾斜度
  • dissolution 溶解
  • mobility 活动性
  • transformation 变换
  • diffusive 扩散的
  • coupling 连接
  • extraction 提取
  • films 薄膜