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活化钢渣在固化稳定化工业重金属污染土中的应用

冯亚松, 杜延军, 周实际, 夏威夷

冯亚松, 杜延军, 周实际, 夏威夷. 活化钢渣在固化稳定化工业重金属污染土中的应用[J]. 岩土工程学报, 2018, 40(S2): 112-116. DOI: 10.11779/CJGE2018S2023
引用本文: 冯亚松, 杜延军, 周实际, 夏威夷. 活化钢渣在固化稳定化工业重金属污染土中的应用[J]. 岩土工程学报, 2018, 40(S2): 112-116. DOI: 10.11779/CJGE2018S2023
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FENG Ya-song, DU Yan-jun, ZHOU Shi-ji, XIA Wei-yi. Utilization of activated steel slag to solidify/stabilize industrially heavy-metal contaminated soils[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 112-116. DOI: 10.11779/CJGE2018S2023
Citation: FENG Ya-song, DU Yan-jun, ZHOU Shi-ji, XIA Wei-yi. Utilization of activated steel slag to solidify/stabilize industrially heavy-metal contaminated soils[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 112-116. DOI: 10.11779/CJGE2018S2023
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活化钢渣在固化稳定化工业重金属污染土中的应用  English Version

  • 东南大学岩土工程研究所,江苏 南京 210096

基金项目: 江苏省环保科研课题（2016031）; 国家自然科学基金项目（41330641,41472258）
详细信息
    作者简介:

    冯亚松(1987- ),男,博士研究生,主要从事工业污染场地修复技术与可持续型固化剂的研发应用等方面的研究。E-mail: fengyasongys@126.com。

    通讯作者:

    杜延军，E-mail：duyanjun@seu.edu.cn

  • 中图分类号: TU45

Utilization of activated steel slag to solidify/stabilize industrially heavy-metal contaminated soils

  • Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China

摘要

    摘要
  • 摘要: 针对钢渣基可持续型固化剂在工业重金属污染土固化稳定化的应用效果进行了试验研究,以重金属固定效率为评价标准,得到了磷酸盐活化钢渣的工艺参数。结果表明,磷酸二氢钾活化可以明显改善钢渣对重金属铅锌镉的固定效果。磷酸二氢钾和钢渣质量比为2%~4%时,通过湿法拌合、20℃风干制得的活化钢渣对重金属铅锌镉的固定效果最佳。并进一步以非活化钢渣作为对比,分析了活化钢渣固化铅锌镉污染土的环境安全及强度特性。结果表明,活化钢渣添加可以显著降低重金属铅锌镉的浸出浓度,提高污染土的pH值。活化钢渣的添加可以提高污染土的无侧限抗压强度,并随着固化剂的掺量的增加而增长;与未活化钢渣相比,钢渣的活化过程会削弱固化土的强度增加,而且固化剂掺加量越大削弱程度越大。
    Abstract: A systematic investigation on the solidification/stabilization effectiveness of industrially heavy-metal contaminated soils by a sustainable steel-slag-based binder (BOFS) is introduced. The activation method of the BOFS is explored, and the heavy-metal immobilization effectiveness is used as an evaluation standard. The results demonstrate that the activation of BOFS with monopotassium phosphate (MKP) can significantly improve the heavy metal immobilization effectiveness. The activated-BOFS (PAB) with a MKP/BOFS ratio of 2%~4% obtained from wet mixing and 20 °C drying is found to possess superior performance. Furthermore, the leaching and strength properties of the PAB-stabilized soils are investigated, and the original BOFS is selected as a control binder for comparison purposes. It is also found that the addition of PAB increases the pH of soils, but reduces the toxicity leaching concentration of Pb, Zn and Cd. Also, the addition of both the original BOFS and PAB increases the unconfined compressive strength (qu) of the stabilized soils, but the activation of BOFS induces a relatively weaker increase in qu. Overall, this study demonstrates that the sustainable PAB binder has positive effects on the immobilization of the heavy metals and strength increase of the stabilized soils.
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    • 参考文献(13)
  • [1] 刘松玉. 污染场地测试评价与处理技术[J].岩土工程学报, 2018, 40(1): 1-37.
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    [7] 冯亚松, 夏威夷, 杜延军, 等. SPB和SPC固化稳定化镍锌污染土的强度及环境特性研究[J]. 岩石力学与工程学报, 2017, 36(12): 3062-3074.
    (FENG Ya-song, XIA Wei-yi, DU Yan-jun, et al.Experimental study on the strength and environmental properties of Ni and Zn contaminated soil stabilized by SPB and SPC binders[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(12): 3062-3074. (in Chinese))
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出版历程
  • 收稿日期:  2018-07-21
  • 发布日期:  2018-10-29

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