Preparation of a new-style composite containing a key bioflocculant produced by Pseudomonas aeruginosa ZJU1 and its flocculating effect on harmful algal blooms
文献类型： 外文期刊
作者： Sun, Peng-Fei 1 ; Lin, Hui 2 ; Wang, Guan 1 ; Lu, Li-Ling 1 ; Zhao, Yu-Hua 1 ;
作者机构： 1.Zhejiang Univ, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Environm Resource & Soil Fertilizer, Hangzhou 310021, Zhejiang, Peoples R China
关键词： Pseudomonas aeruginosa ZJU1;HABs;EPS;Composite
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： A novel composite consisting of clay, bioflocculant, and inorganic flocculant was designed, and its flocculating effect on harmful algal blooms (HABs) was studied in this study. The extracellular polymeric substances (EPS), produced with a yield of 3.58 +/- 0.11 g/L by a newly isolated Pseudomonas aeruginosa ZjU1, was indicated to be a key component in the composite. The components and functional groups of the EPS were analyzed, and it showed that polysaccharides, proteins, and nucleic acids are the main components; polar functional groups in the EPS are responsible for its flocculating activity. The novel composite was optimized by the response surface methodology and after optimization, the optical components and contents of the composite were Kaolin 2.38 g/L, CaCl2 0.28 g/L, KAI(SO4)(2) 0.09 g/L, and EPS 1.75 mg/L The flocculating rates of the composite were tested, and it could rapidly reach 100 +/- 0.13% within 2 min when OD680 of Microcystis aeruginosa was 0.1; it could reach 100 +/- 0.08% within 5 min for OD680 of M. aeruginosa in HABs up to 1.0. These results suggest that the novel composite will be a highly efficient material for the treatment of HABs caused by M. aeruginosa. (C) 2014 Elsevier B.V. All rights reserved.
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