List of Tables

1	Classification of dyes based on their use
2	Principal existing and use emerging processes for dye removal
3	Recent reported adsorption capacity qmax (mg/g) for commercial activated carbons
4	Recent reported adsorption capacity qmax (mg/g) for carbon materials made from solid wastes and coal based sorbents
5	Recent reported adsorption capacity qmax (mg/g) from agriculture and industry
6	Reported adsorption capacities (mg/g) for natural materials
7	Recent reported adsorption capacity qmax (mg/g) for chitosan and chitosan based materials
8	Recent reported adsorption capacity qmax (mg/g) for peat
9	Recent reported adsorption capacity qmax (mg/g) for biomass
10	Recent reported adsorption capacity qmax (mg/g) for other sorbents
11	Compared maximum adsorption capacities for commercial activated carbon and other low cost sorbents
12	Contact time (in minutes) for different adsorption materials
13	The general data of four dyes used in this study
14	Percentage content of carbon, hydrogen and nitrogen in the four husks
15	Effect of agitation time and initial dye concentration on Amaranth adsorption by BGH
16	Effect of agitation time and initial dye concentration on Amaranth adsorption by TDH
17	Effect of agitation time and initial dye concentration on Amaranth adsorption by TH.
18	Effect of agitation time and initial dye concentration on Methylene Blue adsorption by BGH
19	Effect of agitation time and initial dye concentration on Methylene Blue adsorption by TDH
20	Effect of agitation time and initial dye concentration on Methylene Blue adsorption by TH
21	Effect of agitation time and initial dye concentration on Fast green (FCF) adsorption by BGH
22	Effect of agitation time and initial metal concentration on Fast green adsorption by TDH
23	Effect of agitation time and initial dyeconcentration on Fast green (FCF) adsorption by TH
24	Effect of agitation time and initial dye concentration on Rhodamine B by BGH
25	Effect of agitation time and initial metal concentration on Rhodamine B adsorption by TDH
26	Effect of agitation time and initial dye concentration on Rhodamine B adsorption by TH
27	Effect of pH and initial dye concentration on Amaranth adsorption by BGH
28	Effect of pH and initial dye concentration on Amaranth adsorption by TDH
29	Effect of pH and initial dye concentration on Amaranth adsorption by TH
30	Effect of pH and initial dye concentration on Methylene Blue adsorption by BGH
31	Effect of pH and initial dye concentration on Methylene Blue adsorption by TDH
32	Effect of pH and initial dye concentration on Methylene blue adsorption by TH
33	Effect of pH and initial dye concentration on Fast green adsorption by BGH
34	Effect of pH and initial dye concentration on Fast green adsorption by TDH
35	Effect of pH and initial dye concentration on Fast green adsorption by TH
36	Effect of pH and initial dye concentration on Rhodamine B adsorption by BGH
37	Effect of pH and initial dye concentration on Rhodamine B adsorption by TDH
38	Effect of pH and initial dye concentration on Rhodamine B adsorption by TH
39	Sorption isotherm constants and coefficients of determination for adsorption of dyes by TDH
40	Sorption isotherm constants and coefficients of determination adsorption of dyes for BGH
41	Sorption isotherm constants and coefficients of determination for adsorption of dyes by TH
42	Effect of initial chromium (VI) concentration on Lagergren rate constant by BGH
43	Effect of initial Amaranth concentration on Lagergren rate constant by TDH
44	Effect of initial Amaranth concentration on Lagergren rate constant by TH
45	Effect of initial Methylene Blue concentration on Lagergren rate constant by BGH
46	Effect of initial Methylene Blue concentration on Lagergren rate constant by TDH
47	Effect of initial Methylene Blue concentration on Lagergren rate constant by TH
48	Effect of initial Fast green concentration on Lagergren rate constant by BGH
49	Effect of initial Fast green concentration on Lagergren rate constant by TDH
50	Effect of initial Fast green concentration on Lagergren rate constant by TH
51	Effect of initial Rhodamine B concentration on Lagergren rate constant by BGH
52	Effect of initial Rhodamine B concentration on Lagergren rate constant by TDH
53	Effect of initial Rhodamine B concentration on Lagergren rate constant by TH
54	Comparison of adsorption capacity of Methylene Blue with other adsorbents
55	Comparison of adsorption capacity of Amaranth with other adsorbents
56	Comparison of adsorption capacity of Fast green with other adsorbents
57	Comparison of adsorption capacity of Rhodamine B with other adsorbents
58	Type of Isotherm for various RL