Elimination des colorants industriels des eaux par adsorption sur le kaolin

Abstract

The experimental study that we have carried out has been dedicated to the use of our support kaolin in natural cases for the treatment of effluent water. To achieve this objective we chose to work with the astrazon red. We find that the value of ph zero of the element of kaolin in his natural case s 6.27 and we find behind this value that the kaolin has charge positif and in the ph is more than 6.27 the kaolin has negatif value The necessaire time of saturation in the surface of kaolin is changed whene we growth the value of concentration from 50 to 70 whene the concentration is less than 80 mg/l and is 120 when the concentration is 80 and 100mg/l The kaolin works in perfectly in the value of pH equal 6 and dislike the acid pH The perfect value of support solide/liquide is 1mg/l and the value is consider as value optimum of our experiance We observe that the force ionique hasn’t effecte in the capacité of adsorption Langmuire type 1 is applicable in the isothermes of adsorption of red astrazon The seconde ordre is applicable in the cinétiques of our experiances In the end , after this exreiance and our results we conclusion that the kaolin in natural case is a good adsorbant for the objecet