Removal of Remazol brilliant violet textile dye by adsorption using rice hulls

Ribeiro, Geyse Adriana Corrêa; Silva, Domingos Sérgio Araújo; Santos, Clayane Carvalho dos; Vieira, Adriana Pires; Bezerra, Cícero Wellington Brito; Tanaka, Auro Atsushi; Santana, Sirlane Aparecida Abreu

doi:10.1590/0104-1428.2386

Geyse Adriana Corrêa Ribeiro

Inorganic Chemistry Laboratory & Analytics, Department of Chemistry, Centro de Ciências Exatas e Tecnologia – CCET, Universidade Federal do Maranhão – UFMA, Campus do Bacanga, São Luís, MA, Brazil

Domingos Sérgio Araújo Silva

Department of Chemical Technology, Centro de Ciências Exatas e Tecnologia – CCET, Universidade Federal do Maranhão – UFMA, Campus do Bacanga, São Luís, MA, Brazil

Clayane Carvalho dos Santos

Inorganic Chemistry Laboratory & Analytics, Department of Chemistry, Centro de Ciências Exatas e Tecnologia – CCET, Universidade Federal do Maranhão – UFMA, Campus do Bacanga, São Luís, MA, Brazil

Adriana Pires Vieira

Institute of Chemistry, Universidade Estadual de Campinas – UNICAMP, Campinas, SP, Brazil

Cícero Wellington Brito Bezerra ^* * cwb.bezerra@ufma.br

Inorganic Chemistry Laboratory & Analytics, Department of Chemistry, Centro de Ciências Exatas e Tecnologia – CCET, Universidade Federal do Maranhão – UFMA, Campus do Bacanga, São Luís, MA, Brazil

Auro Atsushi Tanaka

Inorganic Chemistry Laboratory & Analytics, Department of Chemistry, Centro de Ciências Exatas e Tecnologia – CCET, Universidade Federal do Maranhão – UFMA, Campus do Bacanga, São Luís, MA, Brazil

Sirlane Aparecida Abreu Santana

Inorganic Chemistry Laboratory & Analytics, Department of Chemistry, Centro de Ciências Exatas e Tecnologia – CCET, Universidade Federal do Maranhão – UFMA, Campus do Bacanga, São Luís, MA, Brazil

* cwb.bezerra@ufma.br

Models	Parameters	RHI		RHT
Models	Parameters	C_i=100 mg L^-1	C_i=1000 mg L^-1	C_i=100 mg L^-1	C_i=1000 mg L^-1
Lagergren	q_e (mg g^-1)	10.17	46.83	15.12	60.26
	k₁ (min^-1)	0.033	0.261	0.079	0.249
	R²	0.9091	0.9208	0.7955	0.9031
Ho	q_e (mg g^-1)	10.88	48.35	16.06	62.40
	k₂ (g mg^-1 min^-1)	0.0049	0.0093	0.0074	0.0065
	R²	0.9684	0.9695	0.9157	0.9596
Elovich	α (mg g^-1 min^-1)	3	253181	31	90545
	β (g mg^-1)	0.628	0.350	0.540	0.250
	R²	0.9845	0.9967	0.9900	0.9961

Isotherms	Parameters	RHI				RHT
Isotherms	Parameters	283 K	298 K	313 K	328 K	283 K	298 K	313 K	328 K
Freundlich	n_F	1.663	1.854	1.990	2.196	2.433	2.519	2.647	3.211
	K_F(L mg^n-1 g^-n)^1/n	0.751	1.250	1.709	2.432	3.260	3.924	4.685	8.156
	R²	0.9941	0.9965	0.9958	0.997	0.9972	0.9985	0.9983	0.9978
Langmuir	q_m(mg g^-1)	71.16	68.63	68.48	65.20	61.41	65.07	66.49	67.87
	K_L(L mg^-1)	0.0017	0.0023	0.0028	0.0037	0.0047	0.0053	0.0060	0.0102
	R²	0.9974	0.9943	0.9914	0.9901	0.9774	0.9728	0.9606	0.9394
Temkin	B(mg g^-1)	13.80	13.74	13.77	13.44	12.13	12.68	12.40	11.52
	K_T(L mg^-1)	0.0214	0.0287	0.0354	0.0448	0.0654	0.0781	0.1036	0.2568
	R²	0.9777	0.9772	0.9757	0.9839	0.9771	0.9771	0.9708	0.9718

Adsorbent	T (K)	K_eq x10^-4	ΔGº (kJ mol^-1)	ΔHº (kJ mol^-1)	ΔSº (J mol^-1 K^-1)	R²
RHI	283 ± 1	0.29	-18.60	40.95	210.41	0.9978
	298 ± 1	0.59	-21.75
	313 ± 1	1.48	-24.91
	328 ± 1	3.00	-28.07
RHT	283 ± 1	1.06	-21.81	20.71	150.27	0.9989
	298 ± 1	1.63	-24.07
	313 ± 1	2.56	-26.32
	328 ± 1	3.49	-28.58

Adsorbent	%C	%H	%N
RHI	35.87	5.04	0.54
RHT	39.73	5.37	1.46
Difference	3.86	0.33	0.92

[1] * cwb.bezerra@ufma.br

Brasil

Brasil

Removal of Remazol brilliant violet textile dye by adsorption using rice hulls

Abstract