Recycling of Chemical Eluent and Soil Improvement After Leaching

Jiang, Mingli; Wang, Shengxiao; Chen, Mengyu; Lu, Huilong; Chen, Yahua; Shi, Liang

doi:10.1007/s00128-019-02748-1

Cited by 3 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ca(OH) 2 also crystallizes and precipitates to form Ca(OH) 2 crystals. Ca(OH) 2 crystals have good cohesion and water stability, which increases the structure density and the strength of the mixture; 7 In addition, Ca(OH) 2 carbonizes with air or CO 2 dissolved in water to produce CaCO 3 crystals. CaCO 3 crystals also have high strength and water stability and fill the pores of the structure to make the structure more compact.…”

Section: Discussionmentioning

confidence: 99%

“…Among them, physical remediation methods such as the soil exchange method, thermal desorption method [5], and glass solidification [6] method have had a significant effect on the remediation of heavy-metal-contaminated sites, but their shortcomings in energy consumption make them unconducive to the treatment of large amounts of contaminated soil. The chemical leaching [7] method has the potential risk of leaching the solution to the environment, while the electric remediation method, as an advanced remediation method without secondary pollution, presents the problem of the high cost of power consumption, and bioremediation [8] and phytoremediation technology [9] has the defect of a long remediation cycle, which is not conducive to the treatment of projects with a tight construction period. This study is based on the treatment of large-scale and high-concentration heavy-metal-contaminated sites, and S/S technology has the following characteristics: strong economic applicability, convenient operation, a short construction period, and a friendly environment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on Properties of Copper-Contaminated Soil Solidified by Solid Waste System Combined with Cement

Liang¹,

Zhang

Fang

et al. 2022

Sustainability

View full text Add to dashboard Cite

Three industrial solid wastes including red mud, carbide slag, and phosphogypsum combined with ordinary Portland cement were used as curing agents to solidify/stabilize loess polluted by a high concentration of copper ions. The unconfined compressive strength, resistivity, permeability coefficient, copper ion leaching concentration, pH value, and other engineering application evaluation indexes were analyzed to preliminarily assess the applicability of the curing agent in the remediation of soil contaminated with a high concentration of copper ions. The mineral phases and functional groups of solidified soil were detected using XRD and FTIR, showing that the strength, electrical resistivity, and pH value of solidified soil decrease following the addition of copper ions. Moreover, the strength and resistivity of solidified soil increase with the curing age, and the pH value decreases with age. For solidified contaminated soil, when the total content of curing agent increases from 10 to 20%, the maximum 28 d strength increases from 1.35 to 5.43 MPa, and in this study, its permeability coefficient, copper ion leaching concentration, and pH value were found to be within the limits set by relevant national standards. In conclusion, red mud-carbide slag-phosphogypsum combined with cement has a good stabilizing effect on sites polluted with a high concentration of copper ions.

show abstract

Section: Discussionmentioning

confidence: 99%