Uncovering the flocculating potential of extracellular polymeric substances produced by periphytic biofilms

被引：33
作者：
Sun, Pengfei [1 ]
Zhang, Jianhong [2 ]
Esquivel-Elizondo, Sofia [3 ]
Ma, Lan [1 ]
Wu, Yonghong [1 ]
机构：
[1] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
[2] Int Engn Consulting Corp, Resources & Environm Business Dept, Beijing 100048, Peoples R China
[3] Arizona State Univ, Biodesign Swette Ctr Environm Biotechnol, 1001 South McAllister Ave, Tempe, AZ 85287 USA
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 248卷
基金：
中国国家自然科学基金;
关键词：
Bioflocculant; Periphytic biofilm; Periphytic EPS; Turbidity removal; Aniline blue; WASTE-WATER; RHODOPSEUDOMONAS-ACIDOPHILA; ADSORPTION BEHAVIOR; AQUEOUS-SOLUTIONS; CRYSTAL VIOLET; ANILINE BLUE; BIOFLOCCULANT; REMOVAL; BACTERIUM; PERFORMANCE;
D O I：
10.1016/j.biortech.2017.06.103
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The aim of this work was to study the characteristics and flocculating properties of extracellular polymeric substances (EPS) extracted from periphytic biofilms. The periphytic EPS, with an extracted yield of 491.8 mg/g, were mainly composed of hetero-polysaccharides and proteins, and the elements C1s, N1s, and O1s. Polysaccharides represented 53.28% of the periphytic EPS. Proteins constituted 20.26% of the EPS, and contributed to at least 34.65% of the total flocculating activity. The periphytic EPS showed high turbidity removal capacity (86.76 +/- 1.52%, 10 min) and efficient aniline blue (AB) removal capacity (56.46 +/- 1.41%, 30 min). The mechanism of AB removal by the periphytic EPS seemed to be a combined technique of "adsorption-flocculation". This study reveals the flocculating capability of periphytic EPS, and suggests that periphytic biofilms are novel sources for bioflocculants preparation. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：56 / 60
页数：5
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