Magnetic chitosan physicochemical properties to improve treated water quality

Autores/as

  • Estephany Santiago Siliceo

Palabras clave:

Iron-oxide magnetic nanoparticles, Magnetic chitosan, Magnetic Nano-softeners, Reclaim water treatment, Water treatment

Resumen

Water treatment technologies such as reverse osmosis,
chemical precipitation, ion exchange, and electrochemical
removal, are generally used to improve water quality and
aesthetics (such alkalinity and hardness). However, this
processes often requires a post treatment adjustment making
them onerous.
In this paper we show iron-oxide magnetic nanoparticles
and its chemical modification with chitosan by coprecipitation
method with high potential to be used on
reclaimed water quality improvement. Five different types of
magnetic chitosan were synthetized varying the amount of
chitosan added to the nanoparticles, previous the nucleation
of the magnetite. All the magnetic chitosan were studied and
compared by DLS and Zeta potential to choose the most
promising material for water treatment.
The magnetic materials were characterized previous their
use by FT-IR, SEM/STEM, Zeta Potential, DLS, and TGA
studies, proving the binding between magnetite and the
biopolymer.
Studies of the magnetic materials on reclaimed water, from
the wastewater treatment plant “La Morita” (Tijuana, B.C.,
México), were carried out to prove their effectiveness to
remove alkalinity and hardness. We found out that both
magnetic materials proved to be effective for trap and
remove carbonates from reclaimed water. At the same time,
we have the possibility of recovering them to further uses
and reduce the operation cost. With all these characteristics
we can classify the prepared materials as sustainable nano
softeners.

Publicado

2021-05-13

Número

Sección

5th Conference on Chemical Sciences and Technology