| Summary: | 碩士 === 中原大學 === 土木工程研究所 === 86 === The purpose of this study is to find the heavy metals movement and distribution in the unsaturated soil, as well as the relationships among the soil adsorption capability, soil water content, and the heavy metal concentration.The results of the experiment showed that, for most of the heavy metals, except Chromium, if the heavy metal concentration or soil water content is too high, the soil adsorption rate will be lower down. When the heavy metals - Cadmium, Nickel, Zinc, Chromium, copper, and Zinc all in one solution, the soil adsorption capability to the former three metals seemed to be affected by the other three metals. It also was found that the soil adsorption rate to the Cadmium is higher than the Nickel and Zinc in the loThe results from the soil tank experiment showed that - the heavy metal concentration increased in every position as the number of inject increased. However, some heavy metal, such as Cadmium, Nickel, and Zinc, were hard to find in the deep soil layer. The pH value of the soil, originally 5.23, has reduced to 1.98, after eight times of injection with solution pH of 1.18.
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