In Situ Chemical Stabilization of Arsenic-contaminated Soils Using Ferrous Sulfate
In this paper, a probe into the stabilization effects of ferrous sulfate (FeSO4) came from two aspects-stabilization efficiency and leachate content. Fe/As molar ratio, arsenic pollution intensity, soil pH, reacted time interval, competitive ions, such as sulfate(SO4 2-), phosphate(PO4 3-) and zinc ion(Zn 2+), were studied in order to discuss their effects on the stabilization of arsenic. Results show that ,to all different levels of arsenic contaminated soils ,when Fe/As molar ratio reaches 6, arsenic stabilization efficiency exceeds 90%,and arsenic concentration in leachate could also reduce to less than 5 mg/L; in the soil pH range from 8.10 to 8.57,ferrous sulfate has obtained the preferable results, and pH=8.23 is the optimum value; because of existing of competitive actions ,the exogenous adding of SO4 2-、PO4 3-and Zn 2+could lead to much poorer performance for FeSO4.
Huimin ZHAO Huanzhen ZHANG Min TANG Fei LI
School of Water Resources and Environment China University of Geosciences Beijing Beijing 100083, China
国际会议
成都
英文
1-5
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）