Kinetic and thermodynamic studies on adsorption of copper (II) ions onto the olive pomace lignocellulosic in the region of Beni Mellal (MOROCCO)

The aim of the present work is the valorization of lignocellulosic material prepared from olive pomace in the field of pollutant treatment of various liquid effluents containing heavy metals toxics such as copper. the chemical characterization of the surface was carried out by the ph at the point of zero charge,this indicates the acidic character of the materials. the satisfactory operating conditions were performed at ph 4,a particle size below 80 μm and a temperature of 20°c. the characterization of solids obtained before and after elimination of the hemicellulose of the olive pomace was performed by infrared spectroscopy and scanning electron microscopy. the results showed that the elimination of hemicellulose has a great influence on the structural and morphological properties as well as the cation exchange capacity of olive pomace. the kinetic study (pseudo-first order and pseudo-second-order),thermodynamic and mechanistic (isotherms langmuir,freundlich,temkin and dubinin radushkevich) of the adsorption of cu(ii) ions on the lignocellulosic obtained from the olive pomace was conducted in aqueous solution. the results gotten have permeated us to specify in a static reactor: the sorption kinetics and the thermodynamic parameters of sorption of copper ions.