Engineering structure and physicochemical properties of Cr(VI) contaminated soils stabilized/solidified by FeSO4-GFC
CAO Yang1,3， LIU Liya2， ZHENG Yang3， CHEN Jinhong4
(1.Ecology Environmental Monitoring Centre of Huangshi Department of Ecology Environment of Hubei Province Huangshi， 435003， China；2.Center for Environmental Education and Communications of Huangshi， Huangshi， 435003， Hubei， China； 3.College of Resources & Environment， Huazhong Agricultural University，Wuhan， 430070， China；4.Department of Urban Construction， Wuchang Shouyi University， Wuhan， 430064， China)
Abstract：In order to study the engineering structure and physicochemical properties of Cr(VI) contaminated soils stabilized/solidified by FeSO4-GFC， the effect of GFC-FeSO4 ratio and curing age on engineering structure and physicochemical properties were investigated in this paper. Results show that the pH， maximum dry density， liquid limit and typical particle size and physicochemical properties increased positively with the GFC-FeSO4 ratio and curing age. However， the redox potential also increased， resulting in reduced Cr(VI) reduction rate and increased environmenta.The engineering structure of Cr(VI) contaminated soils treated by GFC-FeSO4 was significant changed with decreased average pore size and specific surface area. The mechanism of physicochemical property change on GFC-FeSO4 stabilized/solidified Cr(VI) contaminated soils was the formed precipitate such as AFt，C－S－H and C－A－S－H which caused soil aggregates and changed the size distribution， pore structure and material composition.
2022, Vol. 56 
