Papaya (Carica papaya) wood was obtained from the
felled trunk of matured trees. The trunk was debarked, cut
into small pieces (2 cm×2 cm), soaked in boiling water for
30 min, thoroughly washed under tap water, and left for
2–3 h in distilled water, changed 3–4 times. The washed
wood pieces were ground into fibers (diameter: 0.05–0.2 mm;
length: 2.5 mm) and oven dried at 80 ◦C and used for biosorption
studies.