Rivas Javier, Gimeno Olga, de la Calle Ruth G, Beltrán Fernando J
Departamento de Ingeniería Química y Química Física, Facultad de Ciencias, 06071 Badajoz, Spain.
J Hazard Mater. 2009 Sep 30;169(1-3):509-15. doi: 10.1016/j.jhazmat.2009.03.136. Epub 2009 Apr 7.
A three-level full factorial design has been conducted to assess the influence of gas flow-rate, ozone concentration and reaction time on the remediation of soil contaminated with four PAHs (namely acenaphthene, phenanthrene, anthracene and fluoranthene). Under the operating conditions investigated, reaction time and ozone concentration seem to exert a slight positive effect, whereas gas flow-rate does not affect the process efficiency. Average conversions (related to non-ozonated samples) are in the proximity of 50, 70, 60 and 100% for acenaphthene, phenanthrene, anthracene and fluoranthene, respectively. A high conversion percentage is obtained in the first minutes of the process. Ozone decomposition on soil surface can be modelled by its reactions with easily oxidizable organic matter, recalcitrant ozonation intermediates and inorganic active sites.
进行了一项三级全因子设计，以评估气体流速、臭氧浓度和反应时间对受四种多环芳烃（即苊、菲、蒽和荧蒽）污染土壤修复的影响。在所研究的操作条件下，反应时间和臭氧浓度似乎产生轻微的积极影响，而气体流速不影响过程效率。苊、菲、蒽和荧蒽的平均转化率（与未臭氧化样品相关）分别接近50%、70%、60%和100%。在该过程的最初几分钟内获得了较高的转化率。土壤表面的臭氧分解可以通过其与易氧化有机物、难降解臭氧化中间体和无机活性位点的反应来建模。
