Efficiency of Albizzia lebbeck pods and seeds in the removal of heavy metals (Lead, Cadmium and Cobalt)from aqueous solutions

One of the major environmental problems is the pollution of water by heavy metals. Using the biological treatment  is an effective way to reduce heavy concentration because it's environmental friendly,
economic, easy to implement and do not require the expertise. The aim of the  current study is estimate the ability of Albizzia lebbeck pods and seeds as low cost adsorbents for the treatment of aqueous solutions that contains heavy metals (Pb, Cd and Co) with other pollutants by adsorption process and packed bed columns with determining the optimum part and best conditions of it, and study the effect of a number of variables and parameters.This study involved a water samples that were taken aqueous solution. Some chemical parameters were measured before and after treatment of the water samples by adsorbents (Albizzia lebbeck wastes) as Pb, Cd, Co, pH. The current work has examined the impact of various environmental variables such as pH values, contact time,  concentration of heavy metals and single metal ions aqueous system.  Laboratory column design of the adsorption (treatment system) was carried out in transparent glass columns which were used individually to estimate the efficiency of
adsorbents for heavy metals removal. In addition, Fourier transform infrared spectroscopy (FTIR) analysis was also done for determination of functional chemical group in adsorbent. The work has involved regeneration and reused processes for plant wastes three times by rinsing and reloading to provide an effective and economically viable treatment for aqueous solutions .  pH values showed clear impact on adsorption process, but the best removal efficiency of Albizzia lebbeck seed occurred for lead at concentration 70ppm and pH4