Surface analysis reveals biogenic oxidation of sub-bituminous coal by Pseudomonas fluorescens

被引：18
作者：
Hazrin-Chong, Nur Hazlin [1 ]
Marjo, Christopher E. [2 ]
Das, Theerthankar [1 ]
Rich, Anne M. [2 ]
Manefield, Mike [1 ]
机构：
[1] Univ New S Wales, Sch Biotechnol & Biomol Sci, Ctr Marine Bioinnovat, Kensington, NSW 2052, Australia
[2] Univ New S Wales, Mark Wainwright Analyt Ctr, Kensington, NSW 2052, Australia
来源：
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY | 2014年 / 98卷 / 14期
基金：
澳大利亚研究理事会;
关键词：
Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR); Pseudomonas fluorescens; Coal oxidation; Sub-bituminous coal; Contact angle; Scanning electron microscopy (SEM); POLYCYCLIC AROMATIC-HYDROCARBONS; HARD COAL; BIOAVAILABILITY; DEGRADATION; SYSTEMS; DEPOLYMERIZATION; BIODEGRADATION; PHENANTHRENE; PEROXIDASE; ATTACHMENT;
D O I：
10.1007/s00253-014-5832-2
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Direct analysis of the colonised surface on coal using attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) revealed the nature of bacteria-mediated oxidation at the coal surface. Unique oxidation peaks generated by the presence of Pseudomonas fluorescens on coal was shown through ATR-FTIR measurements, and ATR-FTIR imaging illustrated that this peak was only observed within the region of coal colonised by bacteria. Contact angle measurements and surface free energy of adhesion calculations showed that the adhesion between P. fluorescens and coal was thermodynamically favourable, and scanning electron microscopy (SEM) exhibited individual cell or monolayer cluster attachment on coal. Furthermore, Gaussian peak fitting of peroxidase-treated coal ATR-FTIR spectra revealed that peroxidase or related enzymes produced by P. fluorescens may be responsible for coal oxidation. This study demonstrated the usefulness and practicality of ATR-FTIR for analysing coal oxidation by P. fluorescens and may well be applied to other microbe-driven modifications of coal for its rapidity and reliability.
引用
收藏
页码：6443 / 6452
页数：10
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