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首页> 外文期刊>Environmental Pollution >Removal of polycyclic aromatic hydrocarbons from aged-contaminated soil using cyclodextrins: Experimental study
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Removal of polycyclic aromatic hydrocarbons from aged-contaminated soil using cyclodextrins: Experimental study

机译：用环糊精去除老化污染土壤中的多环芳烃的实验研究

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The removal of polycyclic aromatic hydrocarbons (PAHs) from soil using water as flushing agent is relatively ineffective due to their low aqueous solubility. However, addition of cyclodextrin (CD) in washing solutions has been shown to increase the removal efficiency several times. Herein are investigated the effectiveness of cyclodextrin to remove PAH occurring in industrially aged-contaminated soil. β-Cyclodextrin (BCD), hydroxypropyl-β-cyclodextrin (HPCD) and methyl-β-cyclodextrin (MCD) solutions were used for soil flushing in column test to evaluate some influent parameters that can significantly increase the removal efficiency. The process parameters chosen were CD concentration, ratio of washing solution volume to soil weight, and temperature of washing solution. These parameters were found to have a significant and almost linear effect on PAH removal from the contaminated soil, except the temperature where no significant enhancement in PAH extraction was observed for temperature range from 5 to 35℃. The PAHs extraction enhancement factor compared to water was about 200.
机译：使用水作为冲洗剂从土壤中去除多环芳烃（PAHs）由于其水溶性低而相对无效。然而，已证明在洗涤溶液中添加环糊精（CD）可以多次提高去除效率。本文研究了环糊精去除工业老化污染土壤中多环芳烃的有效性。在柱试验中，将β-环糊精（BCD），羟丙基-β-环糊精（HPCD）和甲基-β-环糊精（MCD）溶液用于土壤冲洗，以评估可显着提高去除效率的一些进水参数。选择的工艺参数是CD浓度，洗涤液体积与土壤重量的比率以及洗涤液温度。发现这些参数对从污染土壤中去除多环芳烃具有显着且几乎线性的影响，除了在5至35℃的温度范围内未观察到多环芳烃提取明显增强的温度。与水相比，PAHs的萃取增强因子约为200。

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