| Summary: | 碩士 === 國立中山大學 === 環境工程研究所 === 87 === In order to increase the in-situ remediation efficiency of the contaminated soils by electrokinetics, this study combines the electrokinetic remediation technology and the reactive wall of cation exchange resin and changes the cathode reservoir solution every 5 or 10 days.
Experimental results have shown that this soil treatment technology is capable of increasing the remediation efficiency of the heavy metals Cu and Pb up to 86.54% and 61.12%. After the soil remediation, the cation exchange resin could be regenerated and reused. In so doing, nearly 80% Cu and 50% Pb caught by the resin could be recovered. The following experimental factors are studied to determine their effects on the remediation efficiency: (1)soil type, (2)the kind of cathode and anode reservoir solutions, (3)the frequency of changing cathode reservoir solution, (4)the frequency of changing the reactive wall of the cation exchange resin, and(5)the initial concentration of Cu or Pb. The experimental data obtained are analyzed statistically to determine the contribution of each factor. For Cu removal, the kind of the reservoir solution is the most influencing factor, and the frequency of changing reservoir solution is the second. For Pb removal, no significant factor can be fond. Accordingly, under appropriate operating conditions, the new treatment train technology used in this study could effectively enhance the remediation efficiency by electrokinetics alone.
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