期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 162, 期 -, 页码 374-384出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.06.167
关键词
Bioflocculant; Polysaccharide; Flocculation activity; Decolorization efficiency; Heavy metal ion
资金
- Key Research and Development Program of Guangdong Province [2019B020213001]
- Science and Technology Program of Guangzhou [201904010360]
- National Natural Science Foundation of China [21676104, 21878105]
- National Key Research and Development Program of China [2018YFC1603400, 2018YFC1602100]
- Fundamental Research Funds for the Central Universities [2019PY15]
- Zhihui Zhengzhou 1125 Talent Gathering Plan
In this study, the purification and characterization of a novel polysaccharide-based bioflocculant BM2 produced by a bacterium Bacillus megaterium strain PL8 with self-flocculating property were investigated. The results showed that BM2 was an acidic polysaccharide composed of Gal, GalUA, Glc, GlcUA and Man at a molar ratio of 45.1: 33.8:9.3:9.2:2.4, respectively. The molecular weight of BM2 was 4.55 x 10(6) Da. BM2 had high flocculation efficiencies across a wide pH ranged from 4 to 11 and a wide temperature ranged from 20 to 100 degrees C towards kaolin clay. BM2 was a cation-independent bioflocculant which could achieve high flocculation activity without the addition of other cations. Adsorption bridging was the main mechanism in the flocculation process of BM2 towards kaolin clay. The BM2 also displayed a high removal efficiency in terms of Congo red (88.14%) and Pb2+ ions (82.64%). These results suggested that BM2 had a great potential as an efficient bioflocculant candidate in wastewater treatment. (c) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据