Abstract：
:Red mud (RM) was used to remediate heavy metal-contaminated soils. Experiments with two different dosages of RM added to soils were carried out in this study. It was found that soil pH increased 0.3 and 0.5 unit with the dosage of 3 and 5% (wt%), respectively. At the dosage of 5%, the highest stabilization efficiencies for Cd, Pb, Cu and Zn reached 67.95, 64.21, 43.73 and 63.73%, respectively. The addition of RM obviously transferred Cd from the exchangeable fraction to the residual fraction. Meanwhile, in comparison with the control (no RM added), it reduced 24.38, 49.20, 19.42 and 8.89% of Cd, Pb, Cu and Zn in wheat grains at the RM addition dosage of 5%, respectively. At the same time, the yield of wheat grains increased 17.81 and 24.66% at the RM addition dosage of 3 and 5%, respectively. Finally, the addition of RM did not change the soil bacterial community. These results indicate that RM has a great potential in stabilizing heavy metals in calcareous agricultural soils.
journal_name
Environ Geochem Healthjournal_title
Environmental geochemistry and healthauthors
Wang Y,Li F,Song J,Xiao R,Luo L,Yang Z,Chai Ldoi
10.1007/s10653-018-0089-9subject
Has Abstractpub_date
2018-10-01 00:00:00pages
2143-2153issue
5eissn
0269-4042issn
1573-2983pii
10.1007/s10653-018-0089-9journal_volume
40pub_type
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