Influence of cationic surfactant on adsorption of Cr(VI) onto activated carbon

Removal of cationic heavy metal from aqueous solution by activated carbon impregnated with anionic surfactants

“…These include chemical or physical treatment [18][19][20], and surface modification [21][22][23][24][25][26][27][28]. Among these methods, surface modification method using surfactants (i.e.…”

Adsorption of Cr(VI) onto cationic surfactant-modified activated carbon

“…An adsorbent containing a positive charge on the surface provides an adsorption site for the Cr(VI) because it is an anionic pollutant. Activated carbon, a representative adsorbent, has been widely used to remove diverse pollutants, including organic pollutants, reactive dyes, cationic heavy metals, and anionic metals from the aqueous phase and/or from the vapor phase, because it has huge surface area and various functional groups [11][12][13].…”

“…Consequently, the surface charge is important for removing ionic pollutants. The surface-modification of activated carbon has been reported to increase the surface charge and enhance its adsorption capacity for ionic pollutants [11][12][13].…”

“…In a cationic surfactant/activated carbon/water system, the surfactant adsorbs onto the surface of the activated carbon due to hydrophobic interaction, then the hydrophilic part of the surfactant tends toward the aqueous phase [11,12]. That means the activated carbon has a net positive charge on the surface.…”

Chromium Adsorption from Waters of Different Chemical Composition

“…Zazwyczaj jednak analizuje się roztwory modelowe jednoskładnikowe [10][11][12]. Znacznie mniej doniesień literaturowych dotyczy układów wieloskładnikowych [13][14][15][16].…”