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

Table 6

Effect of some experiment conditions on Cr (VI) ions adsorption ability of PYOS-PP-Na-800-EDTA sample.

pH of solution			Adsorption time			Absorbent weight			Initial Cr (VI) ions concentration
pH	Q (mg/g)	H (%)	Time (min)	Q (mg/g)	H (%)	mos (g)	Q (mg/g)	H (%)	Co (ppm)	Q (mg/g)	H (%)
2	0.80	16.00	20	0.68	13.61	0.1	1.65	29.30	3	1.65	55.00
3	1.30	26.00	30	0.87	17.30	0.2	1.73	34.50	7	3.88	55.43
4	1.65	33.00	45	1.10	21.90	0.5	2.12	42.30	8	4.35	54.48
5	2.14	42.70	60	1.54	30.80	0.6	2.27	45.30	10	5.20	52.00
6	2.36	47.10	90	1.65	33.00	0.8	2.49	49.70	15	8.77	58.47
7	0.28	5.60	120	2.66	53.10	1.0	2.92	58.30
			150	2.81	56.20
			180	2.84	56.80