氧化通风法在石油污染土壤修复中的实验验证

Experimental Verification of Oxidation Ventilation Method in Remediation of Petroleum Contaminated Soils

针对石油污染土壤修复,分别设置氧化实验和氧化通风实验,对使用对二甲苯模拟石油污染的实验土样进行污染物去除。分别选取臭氧浓度、含水率和污染物浓度作为氧化实验的影响因素,选取污染物浓度、通风流量、通风温度、通风时间和含水率作为氧化通风实验的影响因素。氧化实验的结果中,臭氧浓度对对二甲苯去除率影响最大,去除效果最好的实验数据为臭氧浓度100ppm、含水率5%、对二甲苯浓度2 000 mg/kg,去除率达到了78.47%。氧化通风实验的结果显示,通风温度对对二甲苯去除率影响最大,去除效果最好的实验数据为污染物浓度800 mg/kg、通风流量20 L/min、通风温度200℃、通风时间60 min、含水率5%,去除率达到了98.15%。由结果可知,氧化通风法对石油污染的土壤修复效果显著。

As for the remediation of oil-contaminated soils,the oxidation experiment and the oxidation ventilation experiment were set up respectively to remove pollutants from the experimental samples that had pxylene adopted to simulate oil pollution.In which,having ozone concentration,moisture content and pollutant concentration selected as the influencing factors in the oxidation experiment,and the pollutant concentration,ventilation flow rate,ventilation temperature,ventilation time and moisture content selected as the influencing factors in the oxidation ventilation experiment.The oxidation experiment shows that,the ozone concentration has the greatest influence on the removal rate of p-xylene;and as for the experimental data of a 100ppm concentration,5% moisture content and 2 000 mg/kg p-xylene,the removal effect is best and the removal rate can reach 78.47%.The oxidation ventilation experiment shows that,the ventilation temperature has the greatest influence on the removal rate of p-xylene and regarding the experimental data of a 800 mg/kg concentration,20 L/min ventilation flow,200 ℃ ventilation temperature,60 min ventilation time and 5%moisture content,the pollutant removal rate can reach 98.15% and the oxidation ventilation method has a significant effect on remediating oil-contaminated soils.