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Article

The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment

1
Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Torun, Poland
2
Water Supply and Sewage Enterprise LLC, Przemysłowa 4, 99-300 Kutno, Poland
3
Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-100 Torun, Poland
*
Authors to whom correspondence should be addressed.
Academic Editor: Andrea Petrella
Materials 2022, 15(3), 1056; https://doi.org/10.3390/ma15031056
Received: 22 December 2021 / Revised: 18 January 2022 / Accepted: 25 January 2022 / Published: 29 January 2022
(This article belongs to the Special Issue Feature Paper in Section Materials Chemistry)
Inorganic aluminum or iron salts supported with synthetic polymers are commonly used to eradicate colloidal particles from water in coagulation and flocculation processes. Nevertheless, these agents have several disadvantages, such as large volumes of sludge produced or environmental toxicity. Recently biodegradable polymers have been suggested as eco-friendly flocculants for water treatment. This study aimed to investigate the possibilities of using starch and chitosan and their oxidized derivatives as flocculants for filter backwash water treatment. Dialdehyde starch (DST) and dialdehyde chitosan (DCT) were synthesized by periodate oxidization of natural starch from corn and low molecular weight chitosan. The obtained materials have been characterized with scanning electron microscopy (SEM), ATR-FTIR spectroscopy, and thermogravimetric analysis (TGA). Furthermore, we studied the flocculation properties of polysaccharide flocculants in a series of jar tests. The effectiveness of chitosan and starched-based flocculants was compared to synthetic polymers commonly used to treat iron ions-rich filter backwash water. The environmental aspects of these chemicals, particularly the biodegradability of post-flocculation residues, were also addressed. It was found that oxidized starch and chitosan derivatives can be used as ecological flocculating materials to treat potable water or sludge. View Full-Text
Keywords: chitosan; starch; dialdehyde biopolymers; flocculants; water treatment; biodegradation chitosan; starch; dialdehyde biopolymers; flocculants; water treatment; biodegradation
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MDPI and ACS Style

Maćczak, P.; Kaczmarek, H.; Ziegler-Borowska, M.; Węgrzynowska-Drzymalska, K.; Burkowska-But, A. The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment. Materials 2022, 15, 1056. https://doi.org/10.3390/ma15031056

AMA Style

Maćczak P, Kaczmarek H, Ziegler-Borowska M, Węgrzynowska-Drzymalska K, Burkowska-But A. The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment. Materials. 2022; 15(3):1056. https://doi.org/10.3390/ma15031056

Chicago/Turabian Style

Maćczak, Piotr, Halina Kaczmarek, Marta Ziegler-Borowska, Katarzyna Węgrzynowska-Drzymalska, and Aleksandra Burkowska-But. 2022. "The Use of Chitosan and Starch-Based Flocculants for Filter Backwash Water Treatment" Materials 15, no. 3: 1056. https://doi.org/10.3390/ma15031056

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