| 光催化氧化法处理染料中间体H酸水溶液 |
| 摘要点击 1137 全文点击 618 投稿时间：1995-09-29 |
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| 中文关键词 二氧化钛 光催化氧化 H酸 |
| 英文关键词 titanium dioxide photocatalytic oxidation H-acid |
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| 中文摘要 |
| 为了去除水中难氧化的有害染料中间体H酸,研究以TiO2、ZnO、CdS和Fe2O3为催化剂,采用低压汞灯为光源,对H酸水溶液进行光催化氧化实验。结果表明:TiO2和CdS的催化效果最好。采用TiO2作催化剂,光催化氧化5h后,H酸分解率可达90%,反应速率遵从Langmuir-Hinshelwood方程,K=12.3L/mmol,k=25.2×10-6mol/h.溶液中投加10mg/L的Fe3+或Ag+,可使反应时间缩短2-3h.研究探讨了pH、TiO2投加量和H酸浓度对催化氧化过程的影响。 |
| 英文摘要 |
| Photocatalytic oxidation of H-acid in aqueous solution was investigated by irradiating with a 30watts low pressure mercury lamp and using TiO2,ZnO,CdS,Fe2O3 as catalysts.The results indicated that TiO2 and CdS have higher catalytic activity than ZnO and Fe2O3.H-acid in aqueous solution can be degraded more than 90% during a period of 5 hours irradiation when TiO2 is used as catalyst.The rate of photocatalytic oxidation can be expressed by Langmuir-Hinshelwood Equation,the constants K and k were found by experiment to be K=12.3 L/mmol and k=25.2×10-6 mol/h respectively.The reaction time can be shortened 2-3 hours when 10 mg/L Fe3+ or Ag+ is added in H-acid solution.The effects of dosage of catalyst,pH and concentration of Hacid in the solution on photocatalytic oxidation of H-acid were also studied. |
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