高铁酸钾氧化去除弱碱性地下水中低浓度石油类污染物实验研究

研究一般地下水弱碱性水溶液中,高铁酸钾对低浓度石油烃类污染物的氧化去除率。采用0#柴油模拟石油类污染物试验水样,氧化反应在200mL烧杯中模拟完全混合状态完成。实验分析浓度分别为5.02mg/L、2.05mg/L、1.01mg/L和0.52mg/L 4个水样石油类污染物氧化去除率。实验研究显示,石油类污染浓度与高铁酸钾浓度分别按1∶1、1∶2和1∶3投加进行配比,最大氧化去除率97.51%,平均氧化去除率89.46%,氧化反应结束时间为25T。采用乙酸等效计算的导致溶液p H降低小分子有机酸累积量较小;在高铁酸钾过量条件下,石油类污染物氧化反应近似为一级反应。

Experimental Study on Removal of Low Concentration Petroleum Pollutants in Weak Alkaline Groundwater by Potassium Ferrate Oxidation

The oxidation removal efficiency of potassium ferrate for low concentration petroleum hydrocarbon pollutants in general in the weakly alkaline aqueous solution of groundwater was studied.0# diesel oil was used to simulate the water sample of petroleum pollutants,and the oxidation reaction was completed in a 200 ml beaker to simulate the complete mixing state.The experimental analysis concentrations were 5.02 mg/L,2.05 mg/L,1.01 mg/L and 0.52 mg/L in four water samples of petroleum pollutants.Experimental research shows that the concentration of petroleum pollution and potassium ferrate are added at a ratio of 1∶ 1,1∶ 2 and 1∶ 3,the maximum oxidation removal rate is 97.51%,the average oxidation removal rate is 89.46%,and the oxidation reaction end time Is 25 T.The equivalent calculation of acetic acid results in the decrease of pH of solution,and the accumulation of small molecular organic acids was small.Under the condition of excessive potassium ferrate,the oxidation reaction of petroleum pollutants is approximately the first-order reaction.