Degradation of H-acid by combined photocatalysis and ozonation processes
Degradation of H-acid by combined photocatalysis and ozonation processes
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DOI：
10.1016/j.dyepig.2006.11.006
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发表时间：
2008
影响因子：
4.5
通讯作者：
Liying Sun;Hong Lu;Ji-ti Zhou
中科院分区：
文献类型：
--
作者：
Liying Sun;Hong Lu;Ji-ti Zhou
研究了TiO2光催化与臭氧氧化(TiO2UV/O3光催化)相结合降解1-氨基-8-萘酚-3，6-二磺酸。观察到在这一过程中出现了协同效应。研究了臭氧投加量、初始溶液pH和H酸初始浓度对处理效果的影响。结果表明，随着臭氧投加量的增加，COD(化学需氧量)的去除速率增加，而初始pH对COD的去除效果影响不大。用二氧化钛/紫外光/臭氧可以有效地降解500-2000 mg/L的H酸溶液。利用UV-Vis吸收光谱、IC、HPLCMS和IR对降解早期形成的中间体进行了研究，提出了4种可能的中间体：1-amino-5，7，8-trihydroxynaphthalene-3，6-disulfonic酸、1-amino-2，4，5，8-tetrahydroxynaphthalene-3，6-disulfonic酸、8-羟基-1，2-萘醌-3，6-二磺酸和8-羟基-1，4-萘醌-3，6-二磺酸。
The combination of TiO2-assisted photocatalysis and ozonation (TiO2/UV/O3) to degrade H-acid (1-amino-8-naphthol-3,6-disulfonic acid) was investigated. It was observed that a synergistic effect occurs in this process. The effects of O3dosage, initial solution pH and initial concentration of H-acid on the efficiency of the process were also studied. The results showed that COD (chemical oxygen demand) removal rate increased with increasing O3dosage whereas initial solution pH had little effect. An H-acid solution of 500–2000mg/L could be efficiently degraded using TiO2/UV/O3. The intermediates formed in the early phase of degradation were studied using UV–vis absorption spectra, IC, HPLC–MS and IR; four possible intermediates, 1-amino-5,7,8-trihydroxynaphthalene-3,6-disulfonic acid, 1-amino-2,4,5,8-tetrahydroxynaphthalene-3,6-disulfonic acid, 8-hydroxy-1,2-naphthoquinone-3,6-disulfonic acid and 8-hydroxy-1,4-naphthoquinone-3,6-disulfonic acid, were proposed.