国产二氧化钛在光催化降解染料废水中的应用

INVESTIGATION ON PHOTOCATALYTIC DEGRADATION OF DYE WASTEWATER WITH TITANIA PRODUCED IN CHINA

研究了 几种国 产和进口 二氧化钛 在光催 化降解染 料污染 物方面的 应用． Ｘ 射线 衍射 及扫描电镜 分析结果 表明，锐 钛矿型含 量高以 及粒径 小的 二氧 化钛 能很 好地 催化 降解 有机 染 料． 不同结构染 料的降 解难易顺 序为： 酞菁类 ＞ 蒽醌类 ＞ 单偶氮 类； 降解 速度 与吸 附有 直接 关系 ． 搅 拌分散体系 和糊状 体系的实 验结果表 明，难于 生物降 解的高浓 度直接耐 晒大红 ４ Ｂ Ｓ 工业 染料 废水 可被光催化 降解并 矿化，国产 催化剂 可重复利 用多次 ，光源可采 用太阳 光．

Photocatalytic degradation of dye pollutants with titania produced in China was studied. The results of XRD and SEM analyses show that the titania with smaller particle size and higher anatase content has higher activity for the degradation. The decomposition order of the dyes from difficulty to easiness is phthalocyanines>anthraquinones>monoazo dyes, and the degradation rate of the dyes is directly related to their adsorption. The experiments on the stir suspension system and the paste system show that the no biodegradable Direct Light Proof Scarlet 4BS industrial wastewater with high concentration can be photocatalytically degraded and mineralized. The titania produced in China can be used recyclically and the solar light can be used.