Removal of Copper Ions onto Walnut Shells by Using Batch and Continuous Fluidized Bed

An agricultural waste (walnut shell) was undertaken to remove Cu(II) from aqueous solutions in batch and continuous fluidized bed processes. Walnut shell found be effective reaching 75.55% at 20 200 rpm, when pH of the solution adjusted 7. The equilibrium achieved after 6 h contacting time. maximum uptake 11.94mg/g. isotherm models indicated that highest determination coefficient belongs Langmuir model. Cu (II) process kinetic rate model followed pseudo-second-order with 0.9972. More than 95% were adsorbed on walnut shells within optimum agitation speed 800 rpm. main functional groups responsible for biosorption onto hydroxyl, carbonyl,carboxylate, carboxylic acids, alcohols groups, aromatic compounds. In system, column , 7 carried out study effects various parameters like (flow rate,bed depth, initial concentration). time breakthrough 97 min concentration (Co= 20mg/l), depth (L=10cm), flowrate (Q=10l/h)