title: [Stabilization and long-term effect of chromium contaminated soil].
abstract: Short-term (3 d and 28 d) and long-term (1 a) stabilization effects of Cr contaminated soil were investigated through nature curing, using four amendments including ferrous sulfide, ferrous sulfate, zero-valent iron and sodium dithionite. The results indicated that ferrous sulfide and zero-valent iron were not helpful for the stabilization of Cr(VI) when directly used because of their poor solubility and immobility. Ferrous sulfate could effectively and rapidly decrease total leaching Cr and Cr(VI) content. The stabilization effect was further promoted by the generation of iron hydroxides after long-term curing. Sodium dithionite also had positive effect on soil stabilization. Appropriate addition ratio of the two chemicals could help maintain the soil pH in range of 6-8.
authors.affiliation: Shanghai Academy of Environmental Sciences, Shanghai 200233, China. wangjingsean@sina.com
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.affiliation: Shanghai Academy of Environmental Sciences, Shanghai 200233, China.
authors.forename: Qi-Shi
authors.initials: QS
authors.lastname: Luo
authors.affiliation: Shanghai Academy of Environmental Sciences, Shanghai 200233, China.
authors.forename: Chang-Bo
authors.initials: CB
authors.lastname: Zhang
authors.affiliation: Sino-German College of Technology, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Tan
authors.affiliation: Sino-German College of Technology, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Li
mesh_terms: D002857:Chromium / Q000032:analysis*; D004227:Dithionite / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005296:Ferrous Compounds / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D013997:Time Factors
chemical_list: D005296:Ferrous Compounds; D012987:Soil; D012989:Soil Pollutants; D002857:Chromium; D004227:Dithionite; C020748:ferrous sulfate; D007501:Iron; C022597:ferrous sulfide