Effect of Bentonite Colloid on Cr(VI) Transport
in Heterogeneous Porous Media
Xinfeng Gu,
Jiawen Ding,
Zhiqiao Shi
et al.
Abstract:Co-transport of Cr(VI) with bentonite colloids (Bc) at different flow rate, pH, ion strength (IS), and colloid concentration in heterogeneous sand media was investigated. The results showed that obvious penetration of dissolved Cr(VI) in co-transport occurred at about 0.5PV, which was mainly due to the heterogeneity of the sand column. The maximum dimensionless transport fraction ((Ct/C0) max ) of dissolved Cr(VI) was 0.73 in the co-transport (200 mg•L -1 Bc and 2.5 ml min -1 ), much lower than that in the sin… Show more
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