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

Journal Article · Mon Jul 01 04:00:00 EDT 2019 · Journal of Polymers and the Environment

DOI:https://doi.org/10.1007/S10924-019-01440-Z· OSTI ID:22977111

Lima, Vanessa Silva de; Haack, Michele

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{sup −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.

• OSTI ID: 22977111
• Journal Information: Journal of Polymers and the Environment, Journal Name: Journal of Polymers and the Environment Journal Issue: 7 Vol. 27; ISSN 1566-2543
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
COPOLYMERS
ELECTROSTATICS
FLOCCULATION
GUMS
KAOLIN
SERINE
SUSPENSIONS
SYNTHESIS
WASTE WATER