使用改性纳米TiO_2处理难降解石油化工废水的研究

Study on treatment of nondegradable petrochemical wastewater using modified TiO_2

在纳米TiO2中分别加入不同量的Ag+、Pb2+、Fe3+、La3+、Y+、Ce3+,以ABS废水为降解对象,对比了ABS废水COD去除率和光催化前后B/C值,结果表明:改性后TiO2纳米光催化性能大大提高,COD去除率由44.7%上升到85.5%,B/C值从0.23提高到0.47,可生化性得到增强,为后续生物处理奠定了基础,具有广阔的应用前景.

The modified nanometer TiO2 was doped with Ag^＋、Pb^2＋、Fe^3＋、La^3＋、Y^＋、Ce^3＋. The photodegradability of modified nanometer TiO2 was compared with that of TiO2, and the B/C value of photoeatalysed ABS wastewater was compared with that of raw ABS wastewater. The results indicated that the photodegradability of nanometer TiO2 was gready improved after modification while the biodegradability of the wastewater was increased, and it is beneficial for the following biodegradation process. The technology will be applied extensively in the future.