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用臭氧(O_3)对低浓度黄腐酸(FA)水样进行氧化试验。结果:当每mgFA投加O_3小于5.0mg时,以吸光度(A)和化学耗氧量(COD_(cr)变化表示的FA去除率几乎成直线上升,其斜率之差异无显著性意义(P>0.05)。当每mgFA投加O_3大于5.0mg时,A的减少率仍呈上升趋势,而COD_(cr)去除率几乎不再增加。在相同的O_3投量下,COD_(cr)去除率均低于A的减少率(P<0.01)。接触时间对降低率影响不大。当每mgFA投加4.8 mg O_3时,FA水样的BOD_5/COD_(cr)由0.08提高到0.18。提示:适宜的臭氧氧化条件是每mgFA投加5mg O_3接触时间为10min,臭氧氧化后FA的可生物降解性提高,但不理想。
Oxygen (O_3) was used to oxidize the low FA concentration water samples. Results: When the dosage of O_3 per mg FA was less than 5.0 mg, the FA removal rate showed almost linear increase with the change of absorbance (A) and chemical oxygen demand (COD_ (cr)). There was no significant difference in slope between them (P> 0.05). When the dosage of O_3 per mgFA was more than 5.0 mg, the decreasing rate of A still showed an upward trend, but the removal rate of COD_ (cr) almost never increased.With the same dosage of O_3, the removal rate of COD_ (cr) (P <0.01) .The contact time had little effect on the rate of decrease.The BOD_5 / COD_ (cr) in FA water samples increased from 0.08 to 0.18 when 4.8 mg O_ (3) Of the ozone oxidation conditions is added per mgFA 5mg O_3 contact time of 10min, after the oxidation of ozone improved FA biodegradability, but not ideal.