Recent advances in polysaccharide bio-based flocculants

Hossein Salehizadeh; Ning Yan; Ramin Farnood

doi:10.1016/j.biotechadv.2017.10.002

Recent advances in polysaccharide bio-based flocculants

Biotechnol Adv. 2018 Jan-Feb;36(1):92-119. doi: 10.1016/j.biotechadv.2017.10.002. Epub 2017 Oct 7.

Authors

Hossein Salehizadeh¹, Ning Yan², Ramin Farnood³

Affiliations

¹ Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada. Electronic address: Hossein.salehizadeh@utoronto.ca.
² Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada; Faculty of Forestry, University of Toronto, 33 Willcocks St., Toronto, Ontario M5S 3B3, Canada. Electronic address: ning.yan@utoronto.ca.
³ Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada. Electronic address: ramin.farnood@utoronto.ca.

PMID: 28993221
DOI: 10.1016/j.biotechadv.2017.10.002

Abstract

Natural polysaccharides, derived from biomass feedstocks, marine resources, and microorganisms, have been attracting considerable attention as benign and environmentally friendly substitutes for synthetic polymeric products. Besides many other applications, these biopolymers are rapidly emerging as viable alternatives to harmful synthetic flocculating agents for the removal of contaminants from water and wastewater. In recent years, a great deal of effort has been devoted to improve the production and performance of polysaccharide bio-based flocculants. In this review, current trends in preparation and chemical modification of polysaccharide bio-based flocculants and their flocculation performance are discussed. Aspects including mechanisms of flocculation, biosynthesis, classification, purification and characterization, chemical modification, the effect of physicochemical factors on flocculating activity, and recent applications of polysaccharide bio-based flocculants are summarized and presented.

Keywords: Bio-based; Bioflocculant; Biopolymer; Colloids; Flocculant; Flocculation; Grafting; Polymerization; Polysaccharide; Wastewater treatment.

Publication types

Research Support, Non-U.S. Gov't
Review

MeSH terms

Biological Products / chemistry*
Flocculation*
Polysaccharides / chemistry*
Wastewater / chemistry*
Water Purification / methods*

Substances

Biological Products
Polysaccharides
Waste Water