Improving Removal of Nickel from Wastewater using Palm Leaf Ash as a Biosorbent

Nickel (ni) as a heavy metal due to its toxicity should be removed from wastewater and aquaticenvironments using efficient technology. the aim of this study was to remove ni from anaqueous solution using palm leaf ash produced in a furnace. to do so, kinetic andthermodynamic experiments were conducted on the adsorption process. moreover, the effect oftime, ph, adsorbent and initial concentration of ni was studied on ni adsorption. the results ofthe experiment indicated that the ni adsorption process followed the freundlich isotherm model.the study of kinetic data also displayed the removal of ni ions from the pseudo-second-orderkinetics. the results showed that the percentage removal of ni (ii) and maximum adsorptioncapacity of an adsorbent for ni (ii) ions were 94.67% and 40.81 mgg-1, respectively.furthermore, the enthalpy of the adsorption process (δh) was 62706.8 j.mol-1.