| 孙杰,陈果仓,曾沛,张晗.化学通报,2014,77(8):814-818. |
| UV/Fe(Ⅲ)-富马酸盐体系降解对硝基苯酚 |
| Degradation of p-Nitrophenol in Fe(Ⅲ)-Fumarate System under Ultraviolet Radiation |
| 投稿时间：2014-01-12 修订日期：2014-02-13 |
| DOI： |
| 中文关键词: Fe(Ⅲ)-富马酸盐配合物 对硝基苯酚 光降解 猝灭法 荧光法 |
| 英文关键词:Fe(Ⅲ)-Fumarate complexes, p-Nitrophenol, Photo-degradation, Quenching, Fluorescence |
| 基金项目:(21007018)和湖北省自然科学基金资助项目(2008CDB400)资助. |
|
| 摘要点击次数: 2861 |
| 全文下载次数: 0 |
| 中文摘要: |
| 研究在紫外光 (UV) 照射下,Fe(Ⅲ)-富马酸盐体系对对硝基苯酚(PNP) 的光降解反应. 考察了溶液pH值、Fe(Ⅲ)、富马酸盐 (Fumarate) 和PNP的初始浓度对PNP降解率的影响. 结果表明：UV/Fe(Ⅲ)-富马酸盐体系对PNP有光降解作用. 相比于只含Fe(Ⅲ)或者富马酸盐体系,同时加入Fe(Ⅲ)与富马酸盐构成的体系在降解对硝基苯酚方面有协同作用. 在pH3.0-6.0范围内,PNP的降解率随着pH值的增大而降低；随着Fe(Ⅲ)和富马酸盐的初始浓度的增大而增大；随着PNP初始浓度的增大而降低. 氯仿猝灭法证实了该体系在降解PNP反应过程中产生了超氧负离子自由基, 采用荧光法和异丙醇猝灭法证实了该体系在反应过程中产生了羟基自由基,同时证实了羟基自由基为PNP光降解反应的主要反应物质. |
| 英文摘要: |
| Photo-degradation of p-Nitrophenol(PNP) was studied in the Fe(III)-fumarate system under UV irradiation. The effects of pH value, the initial concentrations of Fe(III), Fumarate and PNP were also discussed in detail. The results indicated that PNP was degradated in the Fe(III)-fumarate system under UV irradiation. There was a synergic effect between Fe(III) and fumarate to remove PNP compared with bare Fe(III) or fumarate. The gradation rate of PNP increased with the decreasing of pH value in the range of 3.0-6.0 in the Fe(III)-fumarate system. With initial concentrations of Fe(III) and Fumarate increasing, the degradation rate of PNP increased. The photo-degradation rate of PNP increased with initial concentrations of PNP decreasing. In the experiments, it confirmed that the system produced the ultra-oxygen anion radicals by quenching method with chloroform as a quenching agent in the process of photo-degradation of PNP. Hydroxyl radicals was confirmed as a product by fluorescence method and quenching with isopropanol as a quencher in the Fe(III)-fumarate system under UV radiation, and hydroxyl radicals was the main reactant in the degradation reaction. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|