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Isolation and Irradiation-Modification of Lignin Specimens from Black Liquor and Evaluation of Their Effects on Wastewater Purification

文献类型： 外文期刊

作者： Wang, Ke-qin 1 ; Chen, Jing-ping 1 ; Chen, Liang 1 ; Wu, Xiao-fen 1 ; Su, Xiao-jun 2 ; Amartey, Samuel 3 ; Qin, Wenshe 1 ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Inst Nucl Agr Sci & Space Breeding, Changsha 410125, Hunan, Peoples R China

2.Hunan Agr Univ, Hunan Prov Key Lab Crop Germplasm Innovat & Utili, Changsha 410128, Hunan, Peoples R China

3.Univ London Imperial Coll Sci Technol & Med, Div Biol, London SW7 2AZ, England

4.Lakehead Univ, Dept Biol, Thunder Bay, ON P7B 5E1, Canada

关键词： Black liquor;Irradiation modification;Lignin;Wastewater treatment

期刊名称：BIORESOURCES （ 影响因子：1.614； 五年影响因子：1.923 ）

ISSN： 1930-2126

年卷期： 2014 年 9 卷 4 期

页码：

收录情况： SCI

摘要： In this study, crude lignin extracted from the black liquor generated by a pulp and paper mill was modified by different doses of irradiation. The crude and irradiation-modified lignins were used to treat wastewater that was generated during the production of starch glucoamylase. Changes to the physical and chemical properties and structure of the irradiation-modified lignins were determined using scanning electron microscopy, solubility analysis, elemental analysis, analysis of phenolic hydroxyl group, ultraviolet-visible spectroscopy, and Fourier transform infrared spectroscopy. Irradiation reduced the phenolic hydroxyl content in the lignin but increased its solubility by about 40%; analysis revealed that irradiation also destroyed the skeletal structure of the benzene ring in the lignin. After four minutes of settling, the total nitrogen (TN) and chemical oxygen demand (COD) in the wastewater reached 7.0 mg/L and 1573.1 mg/L, respectively. The settled solids content and protein recovery were 1.12 g/L and 98%, respectively. This study suggested that irradiation-modified lignin extracted from black liquor generated in the pulp and paper industry can be used to treat wastewater from the production of starch glucoamylase.

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