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

Figure 6

(a)–(c) X-ray diffractograms of NTB, 1CPC, and 1HDTMA, respectively. (d)–(h) FTIR spectra of NTB, 1CPC, 1HDTMA, CPC, and HDTMA, respectively.

(a)

(b)