2012 - Europe Direct Iasi

X. 29.
Title
Authors
EUROINVENT 2012
Financial support was provided by the project
POSDRU/89/1.5/S/49944.
SYNTHESIS OF SILVER/CHITOSAN/CLAY
BIONANOCOMPOSITES USING CHEMICAL REDUCTION
METHOD
Claudia-Mihaela Hristodor, Violeta Elena Copcia, Andrei Victor
Sandu, Eveline Popovici
Institution “Alexandru Ioan Cuza” University of Iasi
Description
In this study, silver nanoparticles silver/chitosan were
synthesized into the lamellar space of clay using the chemical
reduction method (ascorbic acid as reducing agent). Chitosan,
clay, and AgNO3 were used as the natural polymeric stabilizer,
solid support, and silver precursor, respectively. The properties
of silver/chitosan/clay bionanocomposites were studied as the
function of concentration of silver/clay ratio. The textural and
morphological properties were studied. Meanwhile, the
crystalline structure and d-spacing of the clay interlayer, average
size and size distribution, surface morphology, elemental signal
peaks, functional groups, and surface plasmon resonance of
silver/chitosan/clay were determined by powder X-ray
diffraction (XRD), FTIR spectroscopy, N2 adsorptiondesorption
isotherms, particle size analysis and Scaning Electron
Microscopy (these studies infer that the particles are mostly
spherical in shape) which reveal of the nano nature of the
particles.
Financial support was provided by the project
POSDRU/89/1.5/S/49944.
X. 30.
Study of the retention capacity of iron salts by ceramic material :
Title
Application for the removal of residual coagulant in drinking
water
Authors J.M. SIELIECHI, G. JOSEPH KAYEM, I. SANDU
Institution University of Ngaoundere, Cameroon
Description
The objective of this work is to used natural materials
(biomaterials) to reduced the residual coagulants in drinking
water. The aluminum and iron contents in drinking water can
mainly be derived from the water treatment process because
these metal ions is commonly used as reactant for coagulationflocculation.
When the optimum physico-chemical condition of
the treatment of raw water is not well established, the probability
Innovative Researches
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