植物源生物表面活性剂——皂素对多环芳烃的增溶特性。
Solubilization properties of polycyclic aromatic hydrocarbons by saponin, a plant-derived biosurfactant.
机构信息
Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310028, China.
出版信息
Environ Pollut. 2011 May;159(5):1198-204. doi: 10.1016/j.envpol.2011.02.001. Epub 2011 Feb 25.
The enhanced solubilization of polycyclic aromatic hydrocarbons (PAHs) by saponin, a plant-derived non-ionic biosurfactant, was investigated. The results indicated that the solubilization capabilities of saponin for PAHs were greater than some representative synthetic non-ionic surfactants and showed strong dependence on solution pH and ionic strength. The molar solubilization ratio (MSR) of saponin for phenanthrene was about 3-6 times of those of the synthetic non-ionic surfactants, and decreased by about 70% with the increase of solution pH from 4.0 to 8.0, but increased by approximately 1 times with NaCl concentration increased from 0.01 to 1.0 M. Heavy metal ions can enhance saponin solubilization for phenanthrene and the corresponding MSR values increased by about 25% with the presence of 0.01 M of Cd2+ or Zn2+. Saponin is more effective in enhancing PAHs solubilization than synthetic non-ionic surfactants and has potential application in removing organic pollutants from contaminated soils.
研究了一种植物来源的非离子型生物表面活性剂——皂素对多环芳烃（PAHs）的增溶作用。结果表明，皂素对 PAHs 的增溶能力大于一些代表性的合成非离子型表面活性剂，并且对溶液 pH 值和离子强度有很强的依赖性。皂素对菲的摩尔增溶比（MSR）约为合成非离子型表面活性剂的 3-6 倍，随着溶液 pH 值从 4.0 增加到 8.0，MSR 值降低了约 70%，但当 NaCl 浓度从 0.01 增加到 1.0 M 时，MSR 值增加了约 1 倍。重金属离子可以增强皂素对菲的增溶作用，当存在 0.01 M 的 Cd2+或 Zn2+时，相应的 MSR 值增加了约 25%。皂素在增强 PAHs 增溶方面比合成非离子型表面活性剂更有效，在去除污染土壤中的有机污染物方面具有潜在的应用。
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