Effects of organic matter components and incubation on the cement-based stabilization/solidification characteristics of lead-contaminated soil

Chemosphere
Shangqi GeXinyu Xie

Abstract

Stabilization/solidification (S/S) has been studied since 1950s and widely used for the treatment of potentially toxic elements (PTEs). The coexistence of organic matter (OM) and PTEs can cause a very complicated mechanism for cement-based S/S applications and bring challenges from both scientific and engineering perspectives. To fill in the knowledge gap, this paper investigates for the first time the effects on S/S characteristics of OM components and incubation, which are the two main factors that result in the inconsistency in the leaching characteristics from the available studies. OM samples with different components (humic acid (HA) and fulvic acid (FA)) and contents were mixed into lead-contaminated soil and incubated for different durations of up to 90 days. The experimental results show that the strength of stabilized soils increases with increasing incubation duration and the lead leaching concentration of stabilized soils is decreased by 60.7%-83.6% from zero to 90 days. The lead leaching concentration of the HA group, which is 144.0% higher with no incubation than the non-OM group, becomes 58.3% lower with 90 days of incubation. The leaching concentration of the FA group remains much higher than those of the other ...Continue Reading

References

Jul 28, 2004·Journal of Colloid and Interface Science·Heike B Bradl
Jun 13, 2008·Journal of Hazardous Materials·Jian-Feng PengGuang-Lei Qiu
Oct 8, 2013·The Science of the Total Environment·Wang-Wang TangBin-Bin Huang
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Mar 10, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Bruna Alice Gomes de MeloMaria Helena Andrade Santana
Jul 20, 2019·Environmental Science and Pollution Research International·Miaomiao XuZemin Wang
Sep 4, 2019·Journal of Hazardous Materials·Silvia ContessiGilberto Artioli

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Citations

Feb 3, 2021·Journal of Hazardous Materials·Š VinterM Kadlečková

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