The structure and flocculation characteristics of a novel exopolysaccharide from a Paenibacillus isolate

被引：18

作者：

Chen, Shijunyin ^{[1
]}

Cheng, Rui ^{[1
]}

Xu, Xiaodong ^{[1
]}

Kong, Changchang ^{[1
]}

Wang, Lei ^{[1
]}

Fu, Renjie ^{[1
]}

Li, Jing ^{[1
]}

Wang, Shiming ^{[1
]}

Zhang, Jianfa ^{[1
,2
]}

机构：

[1] Nanjing Univ Sci & Technol, Ctr Mol Metab, Nanjing 210094, Peoples R China

[2] Nanjing Univ Sci & Technol, Ctr Mol Metab, 200 Xiaolingwei, Nanjing 210094, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2022年 / 291卷

基金：

中国国家自然科学基金;

关键词：

Bioflocculant; Paenibacillus sp; M21629; Exopolysaccharide; WASTE-WATER; POLYSACCHARIDE; PURIFICATION; SEPARATION; ALUM;

D O I：

10.1016/j.carbpol.2022.119561

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Bioflocculants like polysaccharides are excellent alternatives to harmful synthetic flocculants and usability under stricter levels of ecosystem protection. In this study, an exopolysaccharide producing strain Paenibacillus sp. M21629 was isolated. The exopolysaccharide was abundant in carboxylic groups and named floccuronic acid with a high weight average molecular weight of 2.38 x 108 Da. The hexasaccharide repeating units of floccuronic acid were -> 3)-alpha-D-Manp-(1 -> 3)-4-Suc-beta-D-Manp-(1 -> 3)-beta-D-Glcp-(1 -> 4)-beta-D-GlcpA-(1 -> 4)[4,6-Pyr-beta-DGalp-(1 -> 3)]-beta-D-Galp-(1 ->. The floccuronic acid at 0.5-1 ppm showed high turbidity removal efficiency in kaolin suspension (99.8%), coal wastewater (98.8%), and high-turbidity drinking water (89.2%). The flocculation ability of floccuronic acid depended on the instability of solid particles. Owing to these encouraging results, floccuronic acid is expected to be a useful bioflocculant applied in wastewater treatment and the utilization of water resources.

引用

页数：11

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