| 液固比对土壤洗涤去除多环芳烃效果的影响 |
| 摘要点击 2613 全文点击 1377 修订日期：2011-06-25 |
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| 中文关键词 土壤洗涤 液固比 多环芳烃 增溶百分比 表面活性剂 吸附损失率 |
| 英文关键词 soil washing liquid/solid ratio PAHs solubilization percent surfactant adsorption loss ratio |
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| 中文摘要 |
| 液固比是影响土壤洗涤污染物去除率的重要因素.以 Triton X-100 和 Tween-80 为洗涤剂,采用洗涤去除率(R)、吸附损失率(Vs)和新定义的指标增溶百分比(SP)分析液固比对土壤洗涤去除目标多环芳烃效果的影响.结果表明,液固比对土壤洗涤去除多环芳烃效果影响显著.R 随液固比增加呈非线性形式增大,液固比10∶1后 R 增长变缓.同一液固比时,洗涤去除率Triton X-100>Tween-80.Vs随液固比增加显著减少,液固比10∶1后逐渐变缓.同一液固比时,吸附损失率Triton X-100R、Vs和 SP,液固比10∶1应为洗涤有效点,Triton X-100 应是理想洗涤剂,SP是一个有效的指标用于土壤洗涤中液固比的选择.Triton X-100为洗涤剂、液固比10∶1时,R、Vs和 SP 分别为:74.7%、23.47%和48.99%. |
| 英文摘要 |
| Liquid/solid ratio(L/S) is an important influencing factor on contaminant removal in soil washing. The impact of different liquid/solid ratio on washing performance with Triton X-100 and Tween-80 was studied respectively and evaluated through removal ratio (R), surfactant adsorption loss ratio (Vs) and solubilization percent (SP). The results presented that the performance of washing to remove PAHs in soil was significantly affected by liquid/solid ratio. PAH removal ratio was gradually increased with liquid/solid ratio increasing in the non-linear form, R presented nonlinear increasing until L/S=10∶1.Surfactant adsorption loss ratio was insignificantly decreased. At the same liquid/solid ratio, removal ratio of Triton X-100 is more than that of Tween-80.Vs presented drastic decreasing until L/S=10∶1, adsorption loss ratio of Triton X-100 is less than that of Tween-80.SP was decreased after maximum value is occurred at L/S=10∶1.Combining with R, Vsand SP, L/S=10∶1 should be an effective washing point, Triton X-100 should be a reasonable washing solution and SP is a more effective index to chose liquid/solid ratio. When Triton X-100 is as washing solution and L/S=10∶1, R, Vsand SP is 74.7%, 23.47% and 48.99%, respectively. |
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