光催化技术治理城市黑臭河道成效研究

Study on the effect of photocatalytic technology on urban black-odor rivers

研究了采用石墨烯光催化技术治理常州城区黑臭河道长沟河主要水污染物浓度的变化规律,分析了各污染物降解的时效和稳定性。结果表明:劣V类黑臭水体采用光催化技术治理后,主要指标DO、NH3N、COD、TP分别在第7天、第77天、第4天、第21天消除劣Ⅴ类;水质稳定后,DO、SD平均提升率分别为1008.8%、297.8%,NH3N、COD平均去除率分别为87.2%、60.5%,TP平均下降率为82.5%,水质类别提升至Ⅳ类,水体感官得到较大提升,水生态得到改善,生物多样性逐渐得到恢复。

The change rule of main water pollutant concentration in Changgou River of black-odor river in Changzhou City was studied by using graphene photocatalytic technology.The degradation timeliness and stability of each pollutant were analyzed.The results showed that the main indexes of DO,NH 3N,COD and TP eliminated the inferior V class in the 7th day,the 77th day,the 4th day,the 21th day respectively after photocatalytic treatment.After the water quality was stable,the average increase rate of DO and SD were 1008.8% and 297.8%respectively,the average removal rate of NH 3N and COD were 87.2%,60.5%,and the average decrease rate of TP was 82.5%,the water quality category was upgraded to category IV,the water body sensory and water ecology was greatly improved,and the biodiversity was gradually restored.