Treatment of industrial wastewater using a natural and biodegradable adsorbent based on Eucalyptus [étude de l'adsorption du Bleu de Méthylène sur un biomatériau à base de l'eucalyptus selon la taille des particules]

Water pollution from industrial wastewater is a serious problem in the world. this pollution can cause adverse effects on the environment. to reduce the harmful effects of these pollutants,several methods for wastewater treatment,especially physicochemical are implemented,in particular,the technique of adsorption. this study aimed to use a new natural and biodegradable adsorbent based on lebanese eucalyptus (south of lebanon) in a physico-chemical adsorption process for treating colorful industrial discharges. the tests performed on the methylene blue,a cationic dye,showed a remarkable elimination in the first 20 minutes. the influences of various experimental parameters such particle size,adsorbent mass,ph,contact time,initial methylene blue concentration and temperature were studied. experimental results have shown that the adsorption of methylene blue dye in the eucalyptus has reached 99.46% at ph=4 and a temperature of 20±2°c. the study of the isotherm showed that the freundlich model can be used to describe the process of adsorption of methylene blue on the eucalyptus powder.