Table 4. Comparison of maximum sorption capacities of various adsorbents for Cr (VI).

Adsorbents	Temp. (K)	qm (mg/g)	Reference
Sawdust	303	41.5	[45]
Wheat bran	303	40.8	[46]
Rice bran	303	58.9	[46]
Alligator weed	303	82.57	[47]
Parthenium weed	293	24.5	[48]
Silica-based adsorbent	298	68	[30]
Coconut shell carbon	298	20	[49]
E. adenophorum and buckwheat	303	55.19	[17]
Rice husk	298	10.4	[50]
Carbonized pineapple leaves	293	18.77	[51]
Cactus	303	7.082	[52]
Wheat straw and E. adenophorum	308	88.57	Present Research