东湖水质分析及光催化氧化降解研究

于2000－2002年在武汉东湖双湖桥地区采集水样，用GC／MS分析，检出脂肪烃类，邻苯二甲酸酯、酚类、苯系物以及多种含氮有机污染物；同时湖区高锰酸盐指数严重超标，表明武汉东湖部分水域已污染严重，采用高级氧化技术对实际东湖水进行光催化降解实验，结果表明，以紫外光为光源，TiO2为光催化剂，可使湖水CODMn去除率达60％以上，最佳反应条件为TiO2投加量1.0-1.5g/L，光照时间60－90min，并以氙灯为光源，进行摸拟太阳光实验。CODMn去除率亦达47％以上。采用光催化氧化高级水处理技术可有效的氧化东湖水中污染物，亦为太阳能的利用提供可能。

Analysis and Photocatalytic Degradation for East Lake Water Sample

Water samples were collected from East Lake in Feburary ,2001. More than 30 organic pollutants were identified by GC/MS. They were aliphatic hydrocarbons, phthalic esters, phenols benzene hydrocarbons and several nitric compounds. Based mainly on 2000-2002 data, this analysis on the spatio-temporal variations of COD of East Lake, showed that East Lake has been seriously polluted.The photocatalytic degradation of Donghu Lake with TiO2 suspension was investigated. The results showed after an hour UV lamp illumination ,the COD removal rate was up to 60%. The optimal degradation condition was : catalyst concentration being 1.0 ~ 1.5 g/l, illumination time being 60 ~ 90min.With Xenic lamp as light source,the COD removal rate was up to 47%. It has been proved that solar energy can be used as a reliable UV source of the heterogeneous photocatalytic oxidation for the Donghu Lake, with an effective, economical and useful prospect of waste water treatment technology.