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首页> 外文期刊>The Journal of solid waste technology and management >EXPERIMENTAL STUDY ON SOLIDIFICATION OF HEAVY METAL CONTAMINATED SOIL WITH STRAW ASH RESIDUE
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EXPERIMENTAL STUDY ON SOLIDIFICATION OF HEAVY METAL CONTAMINATED SOIL WITH STRAW ASH RESIDUE

机译：EXPERIMENTAL STUDY ON SOLIDIFICATION OF HEAVY METAL CONTAMINATED SOIL WITH STRAW ASH RESIDUE

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摘要

Straw ash residue(SAR) is a solid waste discharged from biomass power plant. Its stacking not only occupies a large amount of land, but also poses a serious threat to the surrounding environment. Through systematic laboratory tests, the engineering properties of lead and zinc contaminated soil solidified by SAR were studied, the mechanism of action was revealed, and the feasibility of solidifying heavy metal contaminated soil by straw ash residue was discussed. The test results show that, the unconfined compressive strength (UCS) of soils polluted by heavy metal ions decreases after. The strength of soils can be improved by adding SAR and the filtration of heavy metal ions can be inhibited. When the concentration of pollutants is low, both Pb~(2+) and Zn~(2+) in the solidified contaminated soil can be effectively solidified. When the concentration of pollutants is high, the solidification effect of Zn~(2+) is better than that of Pb~(2+). The results of dry-wet cycling test show that, the strength of SAR solidified contaminated soil increases first and then decreases with the increase of dry-wet cycles.

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