Raimundo N. Lima Júnior1, João L. I. O. Almeida1, Jones de Andrade2, Flávia O. M. S. Abreu1,*
Journal of Renewable Materials, Vol.8, No.11, pp. 1489-1504, 2020, DOI:10.32604/jrm.2020.011629
Abstract Biocoagulants emerges as a promising technology in water treatment,
in order to exploit renewable and biodegradable materials. The present work aims
to study the coagulant action of chitosan and carboxymethylchitosan on water
with very high turbidity (above 300 NTU), contrasting the physicochemical
results with those obtained for aluminum sulphate. Carboxymethylchitosan was
produced by the Williamson’s ethers synthesis and characterized by potentiometric titration, FTIR and 1
H-NMR. The coagulant tests were performed using
synthetic water in a Jar-test equipment, through the induction of high and low
velocity gradients, followed by sedimentation. The results showed turbidity and
color removal efficiencies above 99%… More >
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