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| 纳米TiO_2催化光降解土壤中PAHs效果 | |
| 引用本文： | 张利红,李培军,徐成斌,陈忠林,李雪梅.纳米TiO_2催化光降解土壤中PAHs效果[J].辽宁工程技术大学学报(自然科学版),2010,29(1). |
| 作者姓名： | 张利红 李培军 徐成斌 陈忠林 李雪梅 |
| 作者单位： | 1. 辽宁大学,环境学院,沈阳,110016;中国科学院,沈阳应用生态研究所,沈阳,110036 2. 中国科学院,沈阳应用生态研究所,沈阳,110036 3. 辽宁大学,环境学院,沈阳,110016 4. 沈阳师范大学,化学与生命科学学院,沈阳,110034 |
| 基金项目： | 国家重点基础研究发展计划项目(2004CB418506);;国家高技术研究发展计划(863)项目(2007AA061101) |
| 摘 要： | 为了研究土壤介质中PAHs催化光降解作用,以多环芳烃苯并a]芘和菲为目标污染物,研究了纳米TiO2催化紫外光降解土壤中多环芳烃的机制。结果表明,土壤中PAHs光降解存在着PAH的光致电离、电子向O2的转移两种途径;在有催化剂TiO2存在时,催化剂光照后形成的电子、空穴能够氧化还原污染物,PAH的光致电离和电子向O2的转移引起的降解,共同完成了光催化降解土壤中的PAHs。 |
| 关 键 词： | 表层土壤 纳米TiO2 PAHs 光催化降解 |
Effects of photocatalytic degradation of PAHs on soil surfaces using nano-TiO2 under UV-light irradiation |
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| ZHANG Lihong,LI Peijun,XU Chengbin,CHEN Zhonglin,LI Xuemei.Effects of photocatalytic degradation of PAHs on soil surfaces using nano-TiO2 under UV-light irradiation[J].Journal of Liaoning Technical University (Natural Science Edition),2010,29(1). | |
| Authors: | ZHANG Lihong LI Peijun XU Chengbin CHEN Zhonglin LI Xuemei |
| Institution: | 1. School of Environmental Science;Liaoning University;Shenyang 110036;China;2. Institute of Applied Ecology;Chinese Academy of Sciences;Shenyang 110016;3. College of Chemistry and Life Science;Shenyang Normal University;Shenyang 110034;China |
| Abstract: | This paper studied the soil borne PAHs (polycyclic aromatic hydrocarbons) photocatalytic degradation effects using TiO2 under UV irradiation with phenanthrene and benzoa]pyrene as target contaminants. The results show that two primary reactions may exist in the initial step of photodegradation of PAHs on soil surfaces,namely,photoionization and electron transfer to dioxygen. With TiO2 as catalyst,the electron-hole is formed on the surface of the catalyst under UV irradiation,which can oxidize or reduce the... |
| Keywords: | soil surface nano-TiO2 PAHs photocatalytic degradation |
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