Synthesis of Alginate Microparticles and their Use in Wastewaters Cleaning
S. PERETZ
Abstract. The synthesis of alginate microparticles happened as a
result of the interaction between sodium alginate and a salt of divalent
metal ions, in the absence or the presence of two cationic surfactants,
dodecyltrimethylammonium bromide and cetyltrimethylammonium bromide. The
alginate cross-link complexes can exist either as homogeneous clear
solutions or precipitates or as microparticles. The effects of salt and
sodium alginate concentrations on the properties of the gel-like membranes
were investigated. The influence of the two surfactants on the domains of
binding isotherms was studied. In this study we focuses also on the
strategy and the optimal conditions for the removal of nitrophenols from
water employing barium-alginate and barium-iron-alginate gel
microparticles. The equilibrium and kinetic experiments of nitrophenols
uptake by alginate microparticles were carried out under different values
of pH, initial concentration of contaminants and the amount of alginate
gel microparticles. The contaminant removal efficiency increases with the
increasing of the pH and decreases with the increasing of initial
contaminant concentration. |