Adsorción de iones Cu2+ por quitosana y su aplicación al suelo para la protección de las plantas ante la toxicidad del metal

Some chemical properties of metal adsorption by chitosan are evaluated in this research work. Thus, the power of chitosan adsorption by Cu 2+ metallic ion was comparatively studied at different pH values and stirring ti- mes. The adsorbed Cu 2+ ion content was determined by atomic absorption, pH 5 being the most appropriate one for its adsorption. On the other hand, several trials were performed to analyze the possibility of chitosan to protect tomato plantlets from toxic levels of Cu 2+ , so proving a bigger root growth and a height decrease of plants treated with the product, effects counteracting toxicity by Cu