The Improvement of Natural Thai Bentonite Modified with Cationic Surfactants on Hexavalent Chromium Adsorption from an Aqueous Solution

Table 5

Cr concentration in the sample after adsorption.

Cr valency state	Adsorbent	Concentration of Cr in powder (mg g^-1)	Concentration of Cr in solution (mg L^-1)
Cr(VI)	1CPC	37.22	130.77
	1HDTMA	43.94	113.93
Cr(III)	NTB	71.69	69.87
	1CPC	60.12	93.01
	1HDTMA	53.75	105.75