【摘要】：異位土壤淋洗技術(shù)是一種有效的污染土壤修復(fù)技術(shù)。以菲和苯并[a]芘為目標(biāo)污染物,選取醇類作為淋洗劑,考察了醇種類及濃度、淋洗劑用量、淋洗時間、淋洗溫度、淋洗次數(shù)對污染土壤(菲和苯并[a]芘質(zhì)量濃度分別為82.5、4.3mg/kg)淋洗效果的影響。結(jié)果表明:修復(fù)的最佳條件為正丙醇體積分數(shù)40%、淋洗劑用量20mL、淋洗溫度20℃、淋洗時間60min、重復(fù)淋洗2次,此時菲和苯并[a]芘的去除率分別達到93.05%、86.85%。
[Abstract]:Heterotopic soil leaching is an effective technique for remediation of contaminated soil. Taking phenanthrene and benzo [a] pyrene as target pollutants, alcohol was selected as eluent. The kinds and concentration of alcohol, the amount of eluent, the time of elution and the temperature of elution were investigated. Effects of leaching times on leaching efficiency of contaminated soil (phenanthrene and benzo [a] pyrene concentration were 82.5 mg / kg and 4.3 mg / kg, respectively). The results showed that the optimum conditions were as follows: the volume fraction of n-propanol was 40%, the amount of eluent was 20ml, the elution temperature was 20 鈩，

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