Remediation of Contaminated Fine-grained Soil by Freezing and Ion Exchange Effect

Conclusions are as follows; (1) Ammonium acetate solution was effective to remove natural potassium in the freeze-thaw process but pure water was not. (2) Level of potassium concentration in the drainage increased with the repetition of freeze-thaw. (3) Remediation efficiency was increased with greater temperature gradient, slower freezing speed and increased number of repetition.