Volume 13, No. 4 (2012)

APPLICATION OF A STRONG ACID RESIN AS ION EXCHANGE MATERIAL FOR WATER SOFTENING – EQUILIBRIUM AND THERMODYNAMIC ANALYSIS

BOGDAN BANDRABUR(1), RAMONA-ELENA TATARU-FĂRMUŞ(2), LILIANA LAZĂR(2)*, GHEORGHE GUTT(1)

The adsorption equilibrium isotherm of calcium from aqueous solution onto Purolite C100E synthetic ion exchange resin have been studied and modelled. The batch method has been employed, using Ca2+ concentration in calcium chloride solution ranging from 42 to 176 mg•L-1 at pH 7.1. The suitability of the Langmuir and Freundlich adsorption isotherm was investigated for calcium chloride solutions – ion exchange resin system. The temperature effect on the calcium removal onto resin was also investigated, and various thermodynamic parameters (ΔG, ΔH and ΔS) have been calculated. These parameters indicate the spontaneous and endothermic nature of the ion exchange process.

ATONISHING [CO2SO3H]-: CARBONATO AND SULFITO NEW ADDUCTS DERIVING FROM THE INTERACTIONS BETWEEN R4NCO2SO3H (R=Et, Me) AND HgX2, SnX4 (X=Cl, Br), SbCl5

DINORA DE BARROS, LIBASSE DIOP(*)

In ethanol, a C-S cleavage occurs in final products on allowing R4NCO2SO3H – R = Me, Et - to react with HgX2, SnX4 (M = Hg, X= Cl, Br), leading to carbonate and sulfite adducts and complexes ,infrared study of which have been carried out, then structures suggested on the basis of spectroscopic data. When (Me4N)CO2SO3H is allowed to react with SbCl5, HgX2 (X = Cl, Br), sulfite adducts were obtained, studied by infrared. The suggested structures are discrete, the sulfite anion behaving as a bidentate ligand.

MULTIPLE BIOMARKER RESPONSE IN THE MUSSEL, PERNA PERNA TO ASSESS THE MARINE QUALITY IN THE BIG CASABLANCA AREA

LAILA EL JOURMI, ABDESSAMAD AMINE, NADIA BOUTALEB, SAID LAZAR(*), SAID EL ANTRI(*)

The aim of this study is to assess the marine environment quality in the Big Casablanca area. A number of biochemical markers were measured in the brown mussel, Perna perna, sampled from four sampling sites characterized by a different degree of contamination and human impacts. As biochemical indices; Catalase (CAT), Glutathione S-transferase (GST), Acetylcholinesterase (AChE), as well as Malondialdehyde (MDA) and Metallothioneine (MT) were evaluated in whole soft tissues of mussels collected from the selected sites. The biomarkers showed statistically significant differences at the polluted sites when compared to the control ones. Our data indicated that CAT and GST activity, MDA and MT concentration in whole mussel bodies, are a higher and significant (p < 0.05) in mussels collected at polluted sites when compared to specimen sampled from control ones. In contrary the response of AChE activity was significantly (p

NEW HALO- AND ORGANOTIN (IV) PHENYLARSENIATO ADDUCTS AND DERIVATIVES

BOCAR TRAORE, LIBASSE DIOP(*), MAMADOU SIDIBE

Four new phenylarseniato adducts and organotin derivatives have been synthesized and studied by infrared. The suggested structures are polymeric, (SnX4; X = Cl, Br) and SnPh3Cl while being discrete for SnPh2Cl(PhAsO3H)2isoBu2NH2. When OH- - - Cl, NH - - - O or NH- - -Cl hydrogen bonds are involved, supramolecular architectures are obtained.

NEW THIO S2- ADDUCTS WITH ANTIMONY (III AND V) HALIDE: SYNTHESIS AND INFRARED STUDY

HASSAN ALLOUCH, LIBASSE DIOP(*)

Five new S2- adducts with SbIII and SbV halides have been synthesized and studied by infrared. Discrete structures have been suggested, the environment around the antimony being tetrahedral, trigonal bipyramidal or octahedral.

NEW R2NH2OH (R = Cy, Bu) ADDUCTS OF MX2, MX3 OR MX5: SYNTHESIS AND INFRARED STUDY

NDONGO GUEYE(1), LIBASSE DIOP(1*), LAMINE DIOP(2)

When Cy2NH and Bu2NH in the presence of a very little amount of water are allowed to react with metal halide CdBr2, SbCl3 or SbCl5, hydroxyl adducts with protonated amines as adverse cations were obtained. Their infrared study allows concluding the presence of OH- linked to the metallic center.

AMINOPHENYL ARSENIATO ADDUCTS AND DERIVATIVES OF SnR2Cl2 (R = Ph, Bu): SYNTHESIS AND INFRARED STUDY

BOCAR TRAORÉ, LIBASSE DIOP(*), MAMADOU SIDIBÉ

Four new phenylarseniato adducts and derivatives have been synthesized on allowing SnR2Cl2 (R = Ph, Bu) to react with Cy2NH2.NH2PhAsO3H.3/2H2O in specific ratios. The obtained new tin (IV) compounds were studied by infrared, infinite chain and discrete structures were suggested on the basis of spectroscopic data, the oxyanion behaving as a bridging bidentate or a tridentate ligand. When secondary interactions are involved supramolecular architectures were obtained.

2[(enH)2O2C-SO3].SnPhCl3 AND Cy2NH2O2C-SO3H.SnPhCl3.H2O: SYNTHESIS AND INFRARED STUDY

DAOUDA NDOYE, LIBASSE DIOP*

By allowing (enH)2O2C-SO3 (in water) and Cy2NH2O2C-SO3 (in ethanol) to react respectively with SnPh3Cl (in water) and SnPh2Cl2 (in ethanol) in specific ratios, the studied complexes are obtained. The suggested structures are discrete and tetrameric, the environment of the tin center being octahedral, the O2C-SO3H- anions behaving as a monodentate or a monochelating ligand.