Experimental Investigations on Adsorption of Reactive Toxic Dyes Using Hedyotis umbellate Activated Carbon

Table 3

Adsorption isotherm parameters.

(a)

Basic green 4
	Langmuir			Freundlich			Temkin
Temp (K)	(mg/g)
303	48.95	0.488	0.9852	26.9	0.207	0.7244	6.576	709.6	0.8838
318	100	0.588	0.9973	30.20	0.279	0.8517	12.66	791.57	0.8592
333	100	0.714	0.9945	35.48	0.287	0.9071	30.27	925.9	0.8560
348	102.38	0.516	0.9978	36.3	0.304	0.9398	33.65	974.16	0.8590

(b)

Acid fuchsin
	Langmuir			Freundlich			Temkin
Temp (K)	(mg/g)
303	133.03	0.018	0.6814	5.834	0.602	0.9458	1.088	473.8	0.8456
318	134.87	0.0208	0.7455	6.162	0.61	0.9619	1.054	495.4	0.8510
333	132.83	0.0266	0.8509	7.298	0.60	0.9831	1.067	525.4	0.8640
348	139.33	0.0332	0.8953	8.576	0.60	0.9883	1.238	555.0	0.8716