title: Study on biodegradation process of lignin by FTIR and DSC.
abstract: The biodegradation process of lignin by Penicillium simplicissimum was studied to reveal the lignin biodegradation mechanisms. The biodegradation products of lignin were detected using Fourier transform infrared spectroscopy (FTIR), UV-Vis spectrophotometer, different scanning calorimeter (DSC), and stereoscopic microscope. The analysis of FTIR spectrum showed the cleavage of various ether linkages (1,365 and 1,110 cm(-1)), oxidation, and demethylation (2,847 cm(-1)) by comparing the different peak values in the corresponding curve of each sample. Moreover, the differences (Tm and ΔHm values) between the DSC curves indirectly verified the FTIR analysis of biodegradation process. In addition, the effects of adding hydrogen peroxide (H2O2) to lignin biodegradation process were analyzed, which indicated that H2O2 could accelerate the secretion of the MnP and LiP and improve the enzymes activity. What is more, lignin peroxidase and manganese peroxidase catalyzed the lignin degradation effectively only when H2O2 was presented.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Tianjue
authors.initials: T
authors.lastname: Hu
authors.forename: Zhengping
authors.initials: Z
authors.lastname: Wu
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.forename: Danlian
authors.initials: D
authors.lastname: Huang
authors.forename: Ying
authors.initials: Y
authors.lastname: Shen
authors.forename: Xiaoxiao
authors.initials: X
authors.lastname: He
authors.forename: Mingyong
authors.initials: M
authors.lastname: Lai
authors.forename: Yibin
authors.initials: Y
authors.lastname: He
mesh_terms: D001673:Biodegradation, Environmental; D002152:Calorimetry, Differential Scanning; D006861:Hydrogen Peroxide / Q000737:chemistry; D008031:Lignin / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D010407:Penicillium / Q000201:enzymology* / Q000378:metabolism; D010544:Peroxidases / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D008031:Lignin; D006861:Hydrogen Peroxide; D010544:Peroxidases; C042858:lignin peroxidase; C051129:manganese peroxidase