Bioremediation of Cu(II) contaminated water by Saccharum officinarum: effect of oxalic acid modification on equilibrium, kinetic and thermodynamic parameters

Adeogun, Abideen Idowu; Idowu, Mopelola Abidemi; Akiode, Kayode Olubunmi; Ahmed, Sikiru Akiyeye

doi:10.1186/s40643-016-0085-9

Bioresources and Bioprocessing

Table 6 Kinetic parameters for the biosorption of Cu²⁺ on Oxalic acid modified and raw Saccharum officinarum biomas

From: Bioremediation of Cu(II) contaminated water by Saccharum officinarum: effect of oxalic acid modification on equilibrium, kinetic and thermodynamic parameters

		Oxalic acid modified biomas					Raw raw biomas
	C _o (mg L⁻¹)	100	200	300	400	500	100	200	300	400	500
	C _e (mg L⁻¹)	3.20	5.04	10.20	42.74	58.50	20.40	37.80	65.20	92.60	137.20
	Q _exp (mg g⁻¹)	48.4	97.48	144.9	178.63	220.75	39.8	81.1	117.4	153.7	181.4
Pseudo first-order	Qe (mg g⁻¹)	45.54	91.62	134.13	168.29	211.69	37.58	75.88	112.47	142.34	169.06
	k ₁ × 10 ⁻² (min⁻¹)	11.4	11.8	12.3	14.6	13.7	8.73	7.37	8.00	7.62	8.57
	R ₂	0.997	0.997	0.995	0.997	0.999	0.996	0.992	0.994	0.988	0.991
	ΔQe _SSE	0.59	0.60	0.74	0.58	0.41	0.56	0.64	0.42	0.74	0.68
	ΔQe _HYBRID	0.66	0.67	0.83	0.64	0.46	0.62	0.72	0.47	0.82	0.76
Pseudo second-order	Qe (mg g⁻¹)	48.88	98.11	144.00	179.37	224.75	40.59	82.71	121.82	154.73	182.67
	k ₂ x10 ⁻³(g mg⁻¹ min⁻¹)	3.65	1.92	1.33	1.34	1.04	3.26	1.30	0.98	0.73	0.72
	R ²	0.999	0.999	0.999	0.999	0.999	0.999	0.998	0.999	0.996	0.998
	ΔQe _SSE	0.10	0.07	0.06	0.04	0.18	0.20	0.20	0.38	0.07	0.07
	ΔQe _HYBRID	0.11	0.07	0.07	0.05	0.20	0.22	0.22	0.42	0.07	0.08
Elovich	α (mg (g min)⁻¹)	109.76	275.87	408.82	1522.13	1946.75	35.10	40.75	81.44	87.92	154.74
	β (g mg⁻¹)	0.16	0.08	0.06	0.05	0.04	0.17	0.08	0.06	0.04	0.04
	Q _{e t=0} (mg g⁻¹)	6.09	11.85	17.44	18.96	23.59	5.77	12.83	17.98	23.49	26.09
	R ²	0.997	0.996	0.995	0.992	0.993	0.998	0.999	0.999	0.999	0.999
	ΔQe _SSE	3.58	8.53	13.29	16.80	21.01	2.53	6.53	10.21	13.84	16.70
	ΔQe _HYBRID	3.98	9.48	14.76	18.67	23.34	2.81	7.25	11.34	15.38	18.56
Avramin	Qe (mg g⁻¹)	45.54	91.62	134.13	168.29	211.69	37.58	75.88	112.47	142.34	169.06
	\(k_{1} \left( {\min^{ - 1} } \right)_{av}^{n}\)	0.28	0.48	0.27	0.36	0.42	0.24	0.38	0.21	0.24	0.35
	n _av	0.41	0.24	0.46	0.40	0.33	0.36	0.19	0.38	0.31	0.24
	R ²	0.997	0.997	0.995	0.997	0.999	0.996	0.992	0.994	0.988	0.991
	ΔQe _SSE	0.59	0.60	0.74	0.58	0.41	0.56	0.64	0.42	0.74	0.68
	ΔQe _HYBRID	0.66	0.67	0.83	0.64	0.46	0.62	0.72	0.47	0.82	0.76

Back to article page