The structure and flocculation characteristics of a novel exopolysaccharide from a Paenibacillus isolate
The structure and flocculation characteristics of a novel exopolysaccharide from a Paenibacillus isolate
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类芽孢杆菌分离物中新型胞外多糖的结构和絮凝特性
DOI：
10.1016/j.carbpol.2022.119561
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Jianfa Zhang
中科院分区：
文献类型：
--
作者：
Shijunyin Chen;Rui Cheng;Xiaodong Xu;Changchang Kong;Lei Wang;Renjie Fu;Jing Li;Shiming Wang;Jianfa Zhang
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 × 108 Da. The hexasaccharide repeating units of floccuronic acid were →3)-α-D-Manp-(1 → 3)-4-Suc-β-D-Manp-(1 → 3)-β-D-Glcp-(1 → 4)-β-D-GlcpA-(1 → 4)[4,6-Pyr-β-D-Galp-(1 → 3)-β-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.
