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

Table 5

Cr (VI) ions adsorption ability of oyster shell samples.

No.	Sample	Q (mg/g)	H (%)
1	QNOS-PP	14.90	29.80
2	QNOS-PP-800	19.50	39.00
3	QNOS-PP-800-EDTA	28.80	57.60
4	PYOS-PP	11.40	22.80
5	PYOS-PP-Na	25.70	51.40
6	PYOS-PP-Na-750	11.77	23.60
7	PYOS-PP-Na-800	25.88	51.56
8	PYOS-PP-Na-900	19.02	38.04
9	PYOS-PP-Na-800-EDTA	32.00	64.00