Amino-Acid-Modified-Cashew Gum Flocculant: Synthesis, Characterization, and Application

Amino-Acid-Modified-Cashew Gum Flocculant: Synthesis, Characterization, and Application

Amphoteric poly( O -methacryloyl- l -serine)-grafted cashew gum (CG- g -P(SerMA)) flocculant was obtained with highly efficient in separation and sequential recovery of kaolin particles from aqueous suspension. The highest flocculation efficiency was achieved with a flocculant synthesized using an O...

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Bibliographic Details
Published in:Journal of polymers and the environment Vol. 27; no. 7; pp. 1465 - 1474
Main Authors: Klein, Jalma Maria, de Lima, Vanessa Silva, Haack, Michele, da Feira, José Manoel Couto, de Camargo Forte, Maria Madalena
Format: Journal Article
Language:English
Published: New York Springer US 01-07-2019
Springer Nature B.V
Subjects:
Amino acids
Amino groups
Anacardiaceae
Chemistry
Chemistry and Materials Science
COPOLYMERS
Efficiency
Electrostatic properties
ELECTROSTATICS
Environmental Chemistry
Environmental Engineering/Biotechnology
Flocculants
FLOCCULATION
GUMS
Impurities
Industrial Chemistry/Chemical Engineering
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
KAOLIN
L-Serine
Materials Science
Original Paper
Polymer Sciences
SERINE
SUSPENSIONS
SYNTHESIS
WASTE WATER
Wastewater
Cashew gum
Amino acid
Graft copolymer
Flocculation
Amphoteric polymers
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Summary:Amphoteric poly( O -methacryloyl- l -serine)-grafted cashew gum (CG- g -P(SerMA)) flocculant was obtained with highly efficient in separation and sequential recovery of kaolin particles from aqueous suspension. The highest flocculation efficiency was achieved with a flocculant synthesized using an O -methacryloyl- l -serine:cashew gum molar ratio of 3:1. The CG- g -P(SerMA) at a dosage of 3.0 mg L −1 resulted in a flocculation efficiency of more than 90% within 20 min for kaolin suspension. The efficiency, in standard experiments, the flocculant CG- g -P(SerMA) was superior to cashew gum and polyacrylamide-based commercial flocculants. The flocculation mechanism involves electrostatic interactions between the negatively charged surface of the kaolin and the protonated amino groups of the flocculant under acidic conditions. These results provide new opportunities and challenges for understanding and improving the removal of impurities present in water and wastewater.
ISSN:1566-2543
1572-8919
DOI:10.1007/s10924-019-01440-z