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学科主题: Chemistry ; Engineering
题名: photodegradation of phenanthrene on cation-modified clays under visible light
作者: Jia Hanzhong; Zhao Jincai; Fan Xiaoyun; Dilimulati Kamila; Wang Chuanyi
刊名: Applied Catalysis B: Environmental
发表日期: 2012
DOI: 10.1016/j.apcatb.2012.04.017
卷: 123-124, 期:7, 页:43-51
收录类别: SCI
摘要: Transformation and fate of polycyclic aromatic hydrocarbons (PAHs) are critically influenced by natural conditions, especially their interactions with various components of soils and sediments. In the present study, phenanthrene was employed as a model to explore the potential photocatalysis effect of various cation-modified clay minerals in the soil under visible-light irradiation. For five types of cation-modified smectite clays, the photodegradation rates of phenanthrene follow the order: Fe3+>Cu2+>>Ca2+>K+>Na+, which is explained in terms of photo-Fenton-like catalysis. To further inspect the effect of clay type, additional two types of clays were paralleled. Among three types of Fe(III)-modified clays, Fe(III)-smectite shows the highest photodegradation rate followed by Fe(III)-vermiculite and Fe(III)-kaolinite. The photoactivity order is consistent with the iron content contained in the three clays, suggesting that Fe(III) content plays an important role in photocatalytic degradation of phenanthrene. The reactivity of iron species greatly depends on the interlayer microenvironment of smectite such as pH and water content. Moreover, phthalates, 9,10-phenanthrenequinone and alkanoic acids were identified by GC/MS analyses as the main intermediate compounds, and the organic compounds were mineralized finally. The overall results provide valuable insights on the transformation and fate of PAHs in the natural soil environment. © 2012 Elsevier B.V.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/1371
Appears in Collections:环境科学与技术研究室_期刊论文

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作者单位: Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Ecomat & Sustainable Technol LEMST, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China

Recommended Citation:
Jia Hanzhong,Zhao Jincai,Fan Xiaoyun,et al. photodegradation of phenanthrene on cation-modified clays under visible light[J]. Applied Catalysis B: Environmental,2012,123-124(7):43-51.
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