Multi-Component Adsorption of Benzene, Toluene, Ethylbenzene, and Xylene from Aqueous Solutions by Montmorillonite Modified with Tetradecyl Trimethyl Ammonium Bromide

Figure 4

(a) Effect of pH on the adsorption of BTEX by the TTAB-Mt (BTEX solution = 150 mg/L, contact time = 24 h and TTAB-Mt conc. = 5 g/L). (b) The effect of BTEX concentration on the adsorption by TTAB-Mt. (initial pH=7±0.5, contact time = 24 h and TTAB-Mt conc. = 5 g/L). (c) Freundlich isotherm model and (d) 𝐷-𝑅 isotherm model.

(a)

(b)

(c)

(d)