石油烃污染土壤修复效果评估及反应机理研究

Effect Evaluation and Mechanism Research on Remediation of Petroleum Hydrocarbon Pollution in Soil

以某石油烃污染地块内的土壤为研究对象,比较不同氧化药剂在不同浓度以及不同激活剂条件下对石油烃去除率的影响,实验表明选用过硫酸钠作为氧化剂,氧化钙的激活效果优于硫酸亚铁,且当激活剂投加质量比为1%,占比氧化药剂30%时,较为适宜;过碳酸钠作为氧化剂对石油烃去除效果相较于过硫酸钠要更为明显,当过碳酸钠的投加量为5%~7.5%,激活剂占氧化药剂的20%~30%时,对石油烃的去除效果非常明显,可高达81.87%;当高锰酸钾作为氧化药剂时,有机质含量的增加和老化时间的延长对石油烃去除效果影响比较明显,投加量大于3%以后去除效果基本未提升。

The effects of different oxidants on the removal rate of petroleum hydrocarbons were compared with the soil in a polluted area.The results showed when sodium persulfatewas used as the oxidant,the activation effect of calcium oxide was better than ferrous sulfate,moreover,the adding mass ratio was 1%which accounted for 30%of the additive amount of the oxidizing agent,it was more appropriate.Compared with sodium percarbonate,sodium percarbonate had a more obvious removal effect on petroleum hydrocarbons,when the dosage of sodium percarbonatewas 5%to 7.5%,and the activator accounted for 20%to 30%of the oxidizing agent,it was more effective for petroleum hydrocarbons,and the removal effect was very obvious,up to 81.87%.When potassium permanganate was used as an oxidizing agent,the increase in organic content and the extension of the aging time had a significant effect on the removal of petroleum hydrocarbons,and the removal effect was basically not improved after the dosage was greater than 3%.