Adsorption Ability for Toxic Chromium (VI) Ions in Aqueous Solution of Some Modified Oyster Shell Types

Figure 5

XRD patterns of PYOS-PP (a), PYOS-PP-Na (b), PYOS-PP-Na-800 (c), PYOS-PP-Na-750 (d), PYOS-PP-Na-900 (e), and PYOS-PP-Na-800-EDTA (f) samples.

(a)

(b)

(c)

(d)

(e)

(f)