@Article{jrm.2020.011629,
AUTHOR = {Raimundo N. Lima Júnior, João L. I. O. Almeida, Jones de Andrade, Flávia O. M. S. Abreu},
TITLE = {Chitosan and Carboxymethylchitosan as High Turbidity Water Biocoagulants},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {8},
YEAR = {2020},
NUMBER = {11},
PAGES = {1489--1504},
URL = {http://www.techscience.com/jrm/v8n11/40266},
ISSN = {2164-6341},
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 <sup>1</sup>
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% for the biocoagulants, by applying dosages
much lower than those used for aluminum sulphate; the volume of sedimentable
solids obtained at the end of the water treatment process was much lower when
chitosan and carboxymethylchitosan were used as coagulants (reduction of 25%
when compared to aluminum sulphate). In summary, carboxymethylchitosan is
a non-toxic, renewable, biodegradable material with high efficiency as a coagulant
for waters with very high turbidity, showing promise for in natura applications.},
DOI = {10.32604/jrm.2020.011629}
}