Influence of rhamnolipids and Triton X-100 on adsorption of phenol by Penicillium simplicissimum.
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.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
Zhifeng
Z
Liu
Zhuotong
Z
Zeng
Guangming
G
Zeng
Jianbing
J
Li
Hua
H
Zhong
Xingzhong
X
Yuan
Yang
Y
Liu
Jiachao
J
Zhang
Ming
M
Chen
Yuanyuan
Y
Liu
Gengxin
G
Xie
D000327:Adsorption; D018533:Biomass; D006017:Glycolipids / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D017830:Octoxynol / Q000378:metabolism*; D010407:Penicillium / Q000378:metabolism*; D019800:Phenol / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D013501:Surface-Active Agents / Q000378:metabolism*
D006017:Glycolipids; D013501:Surface-Active Agents; C418382:rhamnolipid; D019800:Phenol; D017830:Octoxynol