电气浮-光催化氧化对微污染原水中腐植酸的去除研究

STUDY ON THE REMOVAL OF HUMIC ACID IN MICRO-POLLUTED RAW WATER BY ELECTRO-FLOTATION-PHOTOCATALYTIC OXIDATION

运用电气浮-粉末TiO2光催化组合工艺,对微污染原水进行实验研究。在降解腐植酸的静态实验中,开启光强为2×10 W紫外杀菌灯,电压20 V,电流0.4 A,两组极板间距0.5 cm,粉末TiO2投加量1 g/L,反应时间为150 min时,CODMn去除率达87.8%。实验表明:电气浮与光催化氧化联合使用时,可取得较好的协同效果。

A combined technology of electro-flotation and powdered TiO2 photochemical catalysis was used to treat micro-polluted raw water at laboratory scale.During the static experiment of degrading humic acid,the ratio of CODMnremoval reached 87.8% in such conditions as two ultraviolet germicidal lamps of 10 W,the voltage of 20 V,the current of 0.4 A,0.5 cm intervals of two groups of plates,the TiO2 dosage of 1g/L and the reaction time of 150 min.The preferable synergistic effect can be achieved when combining electro-flotation with photocatalytic oxidation.