Concentration of each metal, remaining in solution as the residual metal after biosorption, was determined using atomic absorption spectrophotometer (UNICAM-969). Analytical values were statistically analyzed according to Duncan's multiple range test at p ≤ 0.05 [8]. Papaya wood was analyzed for protein and ash according to AOAC [9], cellulose using the procedure of Kurschner and Hanak [10], and crude fibre and lignin by the method of Goering and van Soest