Biodegradation of photo-oxidized lignite and characterization of the products

Li, Jiantao; Liu, Xiangrong; Yue, Zilin; Zhang, Yaowen

doi:10.1088/1755-1315/108/4/042122

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Finally, the pressed sheets were scanned using light with wavelengths of 4000–550 cm −1 and a resolution of 1 cm −1 . Each sample was scanned 32 times [ 35 , 48 , 49 ].…”

Section: Methodsmentioning

confidence: 99%

Removal of Heavy Metal Ions from Aqueous Solution Using Biotransformed Lignite

et al. 2023

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Heavy metal pollution caused by industrial wastewater such as mining and metallurgical wastewater is a major global concern. Therefore, this study used modified lignite as a low-cost adsorbent for heavy metal ions. Pingzhuang lignite was dissolved and modified using Fusarium lignite B3 to prepare a biotransformed-lignite adsorbent (BLA). The O, H, and N contents of the BLA increased after transformation, and the specific surface area increased from 1.81 to 5.66 m2·g−1. Various adsorption properties were investigated using an aqueous solution of Cu(Ⅱ). The kinetic and isothermal data were well-fitted by pseudo-second-order and Langmuir models, respectively. The Langmuir model showed that the theoretical Cu(II) adsorption capacity was 71.47 mg·g−1. Moreover, large particles and a neutral pH were favorable for the adsorption of heavy metal ions. The adsorption capacities of raw lignite and BLA were compared for various ions. Microbial transformation greatly improved the adsorption capacity, and the BLA had good adsorption and passivation effects with Cu(II), Mn(II), Cd(II), and Hg(II). Investigation of the structural properties showed that the porosity and specific surface area increased after biotransformation, and there were more active groups such as –COOH, Ar–OH, and R–OH, which were involved in the adsorption performance.

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“…Finally, the pressed sheets were scanned using light with wavelengths of 4000–550 cm −1 and a resolution of 1 cm −1 . Each sample was scanned 32 times [ 35 , 48 , 49 ].…”

Section: Methodsmentioning

confidence: 99%

Removal of Heavy Metal Ions from Aqueous Solution Using Biotransformed Lignite

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In addition, lignite is also treated with strong alkalis to extract humic acid, but the associated secondary pollution created remains unsolved [7]. Therefore, the lignite microbial liquefaction introduced in the early 1980s, which is environmentally friendly and free of secondary pollutants attracted attention from researchers worldwide, with some recent advances enhancing its potential for clean and efficient usage [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Contribution of Lignin Peroxidase, Manganese Peroxidase, and Laccase in Lignite Degradation by Mixed White-Rot Fungi

Shi

Liu

Chen

et al. 2020

Waste Biomass Valor

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The catalytic depolymerization of biological enzymes during biological liquefaction of coal is very important. In this study, the effects of medium types, lignite addition, and mixed culture on lignin peroxidase (LiP), manganese peroxidase (MnP) and laccase (Lac) secreted by white-rot fungi are investigated. Fifteen strains of white-rot fungi are used for microbial liquefaction of the Zhaotong lignite in Yunnan. The results show that the activities of LiP, MnP, and Lac are highest in the Czapek-Dox medium (DOX), followed by the Sabouraud Maltose Broth (SMB) medium, and are almost zero in the Potato Dextrose Agar (PDA) medium. In the early stage of fungal growth, the medium contains sufficient nutrients, and lignite addition induces an inhibitory effect on extracellular enzyme secretion, whereas in the late growth stage characterized by nutrient deficiency, it exhibits an enhancing effect. For fungi pair combinations, if only single enzyme activity was considered, the positive synergistic effect of Lac in the mixed culture of s.commune and SL203 would be the highest, with the synergistic coefficient of 233.33. While three enzymes were considered, the integrated effects of ZTW07 and SL203 are the highest, with Lac, MnP, and LiP producing synergistic coefficients of 158.795, 1.217, and 1.006, respectively. It can be seen that the mixed culture can greatly improve the enzyme activity of white rot fungi and is one of the effective methods to improve the liquefaction efficiency.

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Removal of heavy metal ions from aqueous solution using biotransformed lignite as a low-cost adsorbent

Cheng

Zhang

et al. 2023

Preprint

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Heavy metal pollution caused by industrial wastewater such as mining and metallurgical wastewater is a major global concern. Therefore, this study used modified lignite as a low-cost adsorbent for heavy metal ions. Pingzhuang lignite was dissolved and modified using Fusarium lignite B3 to prepare a biotransformed-lignite adsorbent (BLA). The O, H, and N contents of the BLA increased after transformation, and the specific surface area increased from 1.81 to 5.66 m2·g-1. Various adsorption properties were investigated using an aqueous solution of Cu(II). The kinetic and isothermal data were well fitted by pseudo-second-order and Langmuir models, respectively. The Langmuir model showed that the theoretical Cu(II) adsorption capacity was 71.47 mg·g-1. Moreover, large particles and a neutral pH were favorable for the adsorption of heavy metal ions. The adsorption capacities of raw lignite and BLA were compared for various ions. Microbial transformation greatly improved the adsorption capacity, and the BLA had good adsorption and passivation effects with Cu(II), Mn(II), Cd(II), and Hg(II). Investigation of the structural properties showed that the porosity and specific surface area increased after biotransformation, and there were more active groups such as –COOH, Ar–OH, and R–OH, which were involved in the adsorption performance.

show abstract

Biodegradation of photo-oxidized lignite and characterization of the products

Cited by 3 publications

References 6 publications

Removal of Heavy Metal Ions from Aqueous Solution Using Biotransformed Lignite

Removal of Heavy Metal Ions from Aqueous Solution Using Biotransformed Lignite

Contribution of Lignin Peroxidase, Manganese Peroxidase, and Laccase in Lignite Degradation by Mixed White-Rot Fungi

Removal of heavy metal ions from aqueous solution using biotransformed lignite as a low-cost adsorbent

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