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Toxic Leaching and Engineering Properties of Copper Contaminated Soil Cured by Magnesium Phosphate Cement
This study aimed to investigate the solidification effect and engineering characteristics of magnesium phosphate cement (MPC) on heavy metal copper contaminated soil. Four different MPC content levels (5%, 10%,15%, and 20% by weight) were mixed with copper-contaminated soil having various initial Cu2+ concentrations (0.1%, 0.5%, 1%, 2%). The toxicity leaching test and scanning electron microscope (SEM) analysis were conducted to identify the effect and mechanism of MPC on copper-contaminated soil. The study found that the Cu2+ concentration in the leaching solution decreased with an increase in MPC content and a decrease in the initial copper ion concentration, and the solidified soil exhibited more significant leaching characteristics with an increase in MPC content. In the SEM analysis, the percentage of pores in the solidified soil decreased and the structure became denser with an increase in MPC content and aging time. Conversely, as the initial copper ion concentration increased, the percentage of pores increased, the soil structure became looser, and the strength of the solidified soil decreased. Overall, the results of the study showed that the MPC effectively cured the heavy metal copper-contaminated soil and improved its engineering characteristics.
Toxic Leaching and Engineering Properties of Copper Contaminated Soil Cured by Magnesium Phosphate Cement
This study aimed to investigate the solidification effect and engineering characteristics of magnesium phosphate cement (MPC) on heavy metal copper contaminated soil. Four different MPC content levels (5%, 10%,15%, and 20% by weight) were mixed with copper-contaminated soil having various initial Cu2+ concentrations (0.1%, 0.5%, 1%, 2%). The toxicity leaching test and scanning electron microscope (SEM) analysis were conducted to identify the effect and mechanism of MPC on copper-contaminated soil. The study found that the Cu2+ concentration in the leaching solution decreased with an increase in MPC content and a decrease in the initial copper ion concentration, and the solidified soil exhibited more significant leaching characteristics with an increase in MPC content. In the SEM analysis, the percentage of pores in the solidified soil decreased and the structure became denser with an increase in MPC content and aging time. Conversely, as the initial copper ion concentration increased, the percentage of pores increased, the soil structure became looser, and the strength of the solidified soil decreased. Overall, the results of the study showed that the MPC effectively cured the heavy metal copper-contaminated soil and improved its engineering characteristics.
Toxic Leaching and Engineering Properties of Copper Contaminated Soil Cured by Magnesium Phosphate Cement
Lecture Notes in Civil Engineering
Chouw, Nawawi (editor) / Zhang, Chunwei (editor) / Hou, Shiwei (author) / Lai, Zhanwen (author) / Zhang, Hao (author) / Han, Junyan (author)
Australasian Conference on the Mechanics of Structures and Materials ; 2023 ; Auckland, New Zealand
2024-09-03
10 pages
Article/Chapter (Book)
Electronic Resource
English
| Taylor & Francis Verlag | 2017