Bordas François, Lafrance Pierre, Villemur Richard
Institut national de la recherche scientifique, Centre INRS-Eau-Terre-Environnement, Université du Québec, 2800 rue Einstein, C.P. 7500, Sainte-Foy, Québec, Canada, G1V 4C7.
Environ Pollut. 2005 Nov;138(1):69-76. doi: 10.1016/j.envpol.2005.02.017.
The efficacy of a new rhamnolipid biosurfactants mixture to enhance the removal of pyrene from a soil artificially contaminated was investigated. The molar solubilization ratio (MSR) and the partition coefficient between the micelles and water (log K(m)) were found to be 7.5 x 10(-3) and 5.7, respectively. From soil column studies, the pyrene removal increased linearly with the concentration of the injected biosurfactants solution above the effective critical micellar concentration (0.4 g L(-1)). Flushing with a 5.0 g L(-1) biosurfactants solution increased the pyrene concentration in the effluent by 178 times. At high biosurfactants' concentrations (2.5 and 5.0 g L(-1)), the cumulative pyrene recovery reached 70%. This pyrene remobilization takes place independently of the soil organic carbon solubilization. This study provides a combination of batch and column experiments in order to find the conditions for effective soil remediation using a new rhamnolipids mixture.
研究了一种新型鼠李糖脂生物表面活性剂混合物提高从人工污染土壤中去除芘的效果。发现摩尔增溶比（MSR）和胶束与水之间的分配系数（log K(m)）分别为7.5×10(-3)和5.7。从土柱研究中可知，当注入的生物表面活性剂溶液浓度高于有效临界胶束浓度（0.4 g L(-1)）时，芘的去除率随其浓度呈线性增加。用5.0 g L(-1)的生物表面活性剂溶液冲洗使流出物中芘的浓度增加了178倍。在高生物表面活性剂浓度（2.5和5.0 g L(-1)）下，芘的累积回收率达到70%。这种芘的迁移与土壤有机碳的溶解无关。本研究结合了批量和柱实验，以寻找使用新型鼠李糖脂混合物进行有效土壤修复的条件。
