Résumé:
This work is a follow-up of studies conducted at the “Laboratoire de Valorisation des
Matériaux” on water treatment and aims to develop lignocellulosic-based adsorbent through
chemical functionalization for the removal of organic pollutants from water. In order to
improve the sorption of acid dyes, quaternary ammonium functional groups were incorporated
into the structure of the pretreated wood sawdust by grafting of choline groups. The
experimental data obtained from the dye removal study demonstrated that the lignocellulosic
material has excellent properties for the sorption of the studied pollutants. The second part of
this work reports the synthesis of a hyperbranched polymer by means of a polycondensation
of multifunctional monomers followed by permethylation. Like its lignocellulosic homolog,
the as-prepared material proved to be very effective in removing organic dyes from aqueous
solutions. In addition, the hyperbranched polymer presents several advantages such as
straightforward preparation and exceptional sorption efficiency.
