臭氧-活性炭工艺处理油田轻度污染地下水的实验研究

Study on micro-pollution groundwater in oil fields by ozone-granular active carbon

通过对臭氧氧化、活性炭吸附及臭氧-活性炭组合工艺的实验研究，探讨了利用臭氧-活性炭工艺处理石油类污染物轻度污染的地下水的可行性．研究发现，臭氧氧化能去除地下水中的部分石油类污染物（30％）和高锰酸盐指数（〈10％）；单独使用活性炭吸附对石油类污染物和高锰酸盐指数的去除效果有限，在空床停留5～60min条件下，去除率分别约为14％，8％；在正交实验获得的最佳实验条件下，臭氧-活性炭组合工艺可以使地下水中的石油类污染物、高锰酸盐指数达到国家饮用水水质标准（GB5749—2006）．结果证明，臭氧-活性炭工艺是处理石油类污染物轻度污染地下水的有效方法．

The feasibility of Ozone-granular active carbon（Oa-OAC） was studied through treating on groundwater with micro-pollution of oil pollutants. The experiments processes firstly include the ozone oxidation,granular active carbon adsorption respectively, then the O3-GAC combination. The results indicate that ozone can oxide about 30% of petroleum contents and less 10% of index of potassium permanganate. At the same time,GAC is only able to adsorb some 14% of petroleum contents and 8% of index of potassium permanganate. However, the groundwater with micro-pollution in field will accord to the national criterion of drinking water （GB5749-2006）,treated by O3-GAC combination. That means petroleum contents less than 0.3 mg/L and index of potassium permanganate not beyond 2 mg/ L.