College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
Bioresour Technol. 2012 Apr;110:468-73. doi: 10.1016/j.biortech.2012.01.092. Epub 2012 Jan 28.
The effects of rhamnolipids and Triton X-100 on phenol adsorption by Penicillium simplicissimum were studied. The optimum pH was 7 for phenol adsorption by all the test biomasses. The adsorption of phenol at pH 7 by biomass pre-treated with 0.05% Triton X-100, 0.2% Triton X-100, 0.05% rhamnolipids and 0.005% rhamnolipids was 3.4, 2.7, 2.4, and 1.8-fold, respectively, that of untreated biomass. The pseudo-second-order model and the Freundlich isotherms described the adsorption processes better than the pseudo-first-order model and the Langmuir isotherms, respectively. The pre-treatments by surfactants increased the zeta potential and hydrophobicity of P. simplicissimum. Analysis of the cell surface by Fourier transform infrared spectrometry, energy dispersive X-ray, and environmental scanning electron microscopy indicated that the pre-treatments by surfactants changed the cell surface functional groups, element concentrations and micrographs. The results indicated that surfactants can be potentially used to increase phenol adsorption.
研究了鼠李糖脂和 Triton X-100 对青霉（Penicillium simplicissimum）吸附苯酚的影响。所有测试生物量吸附苯酚的最佳 pH 值为 7。用 0.05% Triton X-100、0.2% Triton X-100、0.05%鼠李糖脂和 0.005%鼠李糖脂预处理的生物量在 pH 7 下吸附苯酚的能力分别是未处理生物量的 3.4、2.7、2.4 和 1.8 倍。准二级模型和 Freundlich 等温线比准一级模型和 Langmuir 等温线更好地描述了吸附过程。表面活性剂的预处理增加了青霉（Penicillium simplicissimum）的动电电位和疏水性。傅里叶变换红外光谱、能量色散 X 射线和环境扫描电子显微镜分析表明，表面活性剂的预处理改变了细胞表面的官能团、元素浓度和微观形貌。结果表明，表面活性剂可用于增加苯酚的吸附。
