摘要：

通过TiO₂光催化氧化法,在60min内降解AMP、ADP、ATP有机磷标准化合物、尿素和EDTA有机氮标准化合物,并与国标方法消化结果进行了对比。光催化氧化法消化自然水体中有机磷和有机氮的效果可以达到并超过国标方法;有机磷化合物被降解成PO₄^3-,有机氮化合物先被氧化分解成NH⁴⁺,再进一步被氧化成NO^3-,降解产物便于进行定量测定,并设计出在线分析装置,从而使光催化氧化法替代传统方法用于分析自然水体中的溶解有机磷(DOP)和溶解有机氮(DON)成为可能。

关键词: 光催化, 二氧化钛, 溶解有机磷, 溶解有机氮

Abstract:

The digestion of organic phosphorus standard compounds and organic nitrogen standard compounds including AMP, ADP and ATP, Urea and EDTA, within 60 min by TiO₂ photocatalysis, compared with the results by national standard digestion method, it is found that the digestion effect of TiO₂ photocatalysis is equal to and even better than that of the national standard method. Organic phosphorus compounds are degraded into PO₄ ^3- and organic nitrogen compounds are oxidized and decomposed into NH₄ +. Moreover, the products of degradation is only PO₄ ^3-, NH₄ ⁺, NO₄ ^- which are easy to check quantitatively. The equipment is designed, so it is possible that photocatalysis is instead of the traditional method in on-line analysis of the DOP and DON in water.

Key words: photocatalysis, titanium oxide, dissolved organic phosphorus, dissolved organic nitrogen

中图分类号: 

• X703.5

• O661