重金属污染土壤的电动力学修复试验研究

Electrokinetic Remediation Experimental Study of Heavy Metal Contaminated Soil

摘要:

采用自制的实验装置研究重金属污染土壤的电动力学修复性能,通过间歇断电法和提高电压法提高单一重金属污染土壤的重金属去除率,取得了良好的效果,并且对多离子污染土壤的电动修复进行了研究.结果表明：间歇断电法和提高电压法与相同试验条件下的普通试验相比,Cd去除率分别提高了6.17%和0.56%,电能消耗分别节省了51.86%和12.4%.多离子污染土壤Cu,Pb,Cd的去除率分别为68.56%,75.31%,69.90%,相对于单一离子Cd的电动试验,修复效果降低不少.电能消耗为5.061 2 kJ·g-1,比单一离子的电能消耗高出许多.

Abstract:

Electrokinetic remediation capability was researched by selfdesigned device.The interval power breaking method and voltage improving method were used to increase removal efficiency of single iron contaminated soil,and soil contaminated by three ions recovery through electrokinetic remediation was also done.The result shows that Cd removal efficiency of interval power breaking and voltage improving are respectively 6.17% and 0.56% higher than that of common experiment,and power consumption are 51.86% and 12.4% less.Removal efficiency of Cu,Pb and Cd are 68.56%,75.31% and 69.90%,respectively,which are lower than that of the same single iron,and power consumption are 5.0612 kJ·g-1,which is more than that of the same single one.