Article (Scientific journals)
Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
Araújo, Diana; Concórdio-Reis, Patricia; Marques, Ana Carolina et al.
2020In Environmental Technology, 41, p. 287-295
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Keywords :
Enterobacter A47; FucoPol; Kaolin
Abstract :
[en] In this study, the flocculation properties of FucoPol, a bacterial extracellular polysaccharide, were investigated. FucoPol is a high molecular weight polymer and negatively charged due to the presence of glucuronic acid and the acyl groups succinyl and pyruvyl. High flocculation rate values (>70%) were achieved with a low bioflocculant dosage of 1 mg/L, for pH values in the range 3–5 and temperature within 15–20°C. The bioflocculant was also shown to be stable after freezing/thawing and heating up to 100°C. Given the polymer’s anionic character, the size of flocs formed and their surface profile, bridging seems to be the main flocculation mechanism of FucoPol. This study demonstrated that FucoPol is a promising natural, biodegradable and biocompatible alternative to the currently used synthetic or inorganic hazardous products, with potential to be used as a novel flocculation agent in several applications, such as water treatment, food or mining. Further studies will involve evaluating the reduction of cation dosage on flocculation efficiency, as well as testing the applicability of FucoPol to flocculate different types of suspended solids, such as, for example, activated carbons, soil solids or yeast cells. © 2018 Informa UK Limited, trading as Taylor & Francis Group
Research center :
CEIB - Centre Interfacultaire des Biomatériaux - ULiège
Disciplines :
Materials science & engineering
Author, co-author :
Araújo, Diana;  UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal, Portugal
Concórdio-Reis, Patricia;  UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal, Portugal
Marques, Ana Carolina;  i3N/CENIMAT Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA Caparica, Portugal, Portugal
Sevrin, Chantal ;  Université de Liège - ULiège > CEIB
Grandfils, Christian ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biochimie et physiologie générales, et biochimie humaine
Alves, Vítor D.;  LEAF – Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal
Fortunato, Elvira;  i3N/CENIMAT Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA Caparica, Portugal, Portugal
Reis, Maria A. M.;  UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal, Portugal
Freitas, Filomena;  UCIBIO-REQUIMTE, Chemistry Department, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica, Portugal, Portugal
Language :
English
Title :
Demonstration of the ability of the bacterial polysaccharide FucoPol to flocculate kaolin suspensions
Publication date :
2020
Journal title :
Environmental Technology
ISSN :
0959-3330
eISSN :
1479-487X
Publisher :
Taylor and Francis Ltd., United Kingdom
Volume :
41
Pages :
287-295
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 September 2019

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