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Volume: 44
Main Author: 王意;刘志彬;刘锋;魏启炳;陈晓悦
Format: Journal Article
Language: Chinese
Place of publication: 城市地下工程与环境安全江苏省重点实验室,江苏南京210096 2017
published in: 水文地质工程地质 Vol. 44; no. 6; pp. 70 - 76
Data of publication: 2017
ISSN: 1000-3665
Alternate Title: Influence of pH on the compressibility of zinc-contaminated kaolin and the zinc diffusion characteristics
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Bibliography: To examine the effect of zinc ion on the compressive property of the saturated kaolin and the diffusion characteristics of zinc ion under different pH values, a series of one-dimensional consolidation tests and soil column diffusion tests were carried out with artificially prepared remolded soil samples. The test results indicate that the compressibility index of zinc-contaminated kaolin does not change much if the concentration of zinc ion is lower than 0.05 mol/L. However, the increase of precipitation of Zn( OH)2 will lead to a slight decrease in soil compressibility. The decreasing velocity of the zinc ion in the free solution is the highest over the alkaline kaolin, then the neutral kaolin, and lowest over the acid kaolin. The electrical conductivity (EC) of the solution can indirectly reflect the concentration of dissolved zinc ion. When the kaolin is in neutral and alkaline environments, the EC of the free solution above the soil column is positively correlated with the concentration of zinc ion in the
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