A new lignocellulosic material based on Luffa Cylindrica for Nickel (II) adsorption in aqueous solution

In this paper, a new natural lignocellulosic material based on Luffa Cylindrica, (LC), to adsorb the Ni (II) in the water. The Luffa Cylindrica powder (LCP) is characterized using different techniques. The effect of different operating parameters on the adsorption of Ni (II) ions is investigated. Batch adsorption experiments are performed as a function of adsorbent dose, pH, Nickel concentration, contact time and temperature.  The optimum conditions for maximum adsorption were attained at pH 6 and LC dose of 1 g/L. The results show that the increase in the temperature leads to decrease the adsorption quantity of Ni (II) on LCP up to the maximum in the range of 6.84-7.87 mg/g. On the other hand, the results of the adsorption isotherms follow the Freundlich model and the kinetic adsorption and the pseudo-second order reaction. Moreover, the thermodynamic study indicates that the adsorption process, which depends on the solution pH, is an exothermic and spontaneous phenomenon. Overall, the results show the adsorption behavior of this raw material that can be used as a low-cost alternative to commercial materials