过氧化氢、过碳酸钠活化过硫酸钠氧化—微生物降解联用技术修复原油污染土壤

分别以H₂O₂和Na₂CO₃·1.5H₂O₂活化Na₂S₂O₄降解原油污染土壤,考察氧化后土壤的原油降解率、pH、微生物含量以及原油组分的变化,比较两种活化剂对过硫酸钠氧化—微生物降解联用技术修复原油污染土壤效果的影响。实验结果表明：两种活化剂氧化处理7 d后的最大原油降解率分别达到42.94%和44.07%;氧化后原油组分的占比情况发生变化,w（饱和烃）增加5.28~11.93个百分点,而w（芳香烃）、w（胶质）和w（沥青质）则分别降低了0.10~2.53,2.53~3.80,0.94~3.43个百分点;添加微生物菌剂进行50 d的生物降解后,两种活化剂的最大原油降解率分别达到71.00%和75.70%,比单独微生物降解时提高了5.96~12.08个百分点。

Remediation of crude oil contaminated soil by H2O2 and Na2CO3 · 1.5H2O2 activated Na2S2O8 oxidation-microbial degradation combination process

Crude oil in soil was degraded by Na₂S₂O₄ activated with H₂O₂ and Na₂CO₃·1.5H₂O₂,respectively. The changes of crude oil degradation rate,pH,microbial content and crude oil components in the soil after oxidation were investigated,and the effects of two activators on the remediation of crude oil polluted soil by sodium persulfate oxidation-microbial degradation combination process were compared. The results showed that：The maximum degradation rates of crude oil after 7 d of oxidation treatment with two activators were 42.94% and 44.07%,respectively;The proportion of crude oil components changed after oxidation,w（saturated hydrocarbon）increased by 5.28-11.93 percentage points,while w（aromatic hydrocarbon）,w（colloid）and w（asphaltene）decreased by 0.10-2.53,2.53-3.80,0.94-3.43 percentage points,respectively;After 50 d of biodegradation with the addition of microbial inoculum,the maximum crude oil degradation rates of the two activators reached 71.00% and 75.70%,respectively,which were 5.96-12.08 percentage points higher than that by only biodegradation.