Adsorption des éléments traces métalliques par les écorces forestières, un co-produit de la filière bois. Optimisation des propriétés par modifications induites par voies chimique et biologique.
作者： Cédric Astier
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摘要: Les ecorces de sapin Douglas sont utilisees comme biosorbant. isothermes d'adsorption et leur traduction par le modele Langmuir conduisent pour des brutes a valeurs capacite maximale (qmax) 0,242 0,199 meq. G-1 d'affinite (b) 4,8 2,6 L. Meq-1 les cations PbII CdII respectivement. Ensuite, modifiees voie chimique oxydations controlees ou greffages covalents apres amination reductrice en presence d'hydrolysats d'homogalacturonane iotacarraghenane. Ces modifications induisent une evolution significative qmax b qui est interpretee selon la theorie HSAB. Enfin, modification induite biologique. La croissance sapins Douglas, cultives sous serre sur sol contamine Cd, conduit composition dont capacites sont, dans ce cas, diminuees.
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