Journal
WATER RESEARCH
Volume 95, Issue -, Pages 59-89Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2016.02.068
Keywords
Chitosan-based flocculants; Structure-activity relationship; Structural factors; Flocculation mechanism; Chemical modification; Water treatment
Funding
- Natural Science Foundation of China [51438008, 51378250]
- Six Talent Peaks Project in Jiangsu Province of China [2015-JNHB-003]
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In recent years, the use of chitosan and its derivatives as flocculants in water treatment has received considerable attention due to their many advantages, including their widespread availability, environmental friendliness, biodegradability, and prominent structural features. However, it is a significant strategy for selection and design of the high-performance materials on the basis of their structure activity relationships. Here we describe several of the chemical modification methods commonly used to prepare chitosan-based flocculants. These methods allow convenient control and adjustment of the structures of the obtained materials to meet the different practical requirements. The influence of structural elements of the chitosan-based flocculants on their flocculation properties are emphasized in this review by examining different flocculation mechanisms and their applications in the treatment of various wastewaters containing different pollutants (insoluble suspended colloids but also dissolved matters). Above all, the chitosan-based flocculants with proper structures by precise structure control bear great application potentials in water treatment. (C) 2016 Elsevier Ltd. All rights reserved.
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