Adsorption characteristics of Orange II and Chrysophenine on sludge adsorbent and activated carbon fibers

From spent Mg/Al layered double hydroxide to porous carbon materials

“…The results showed that Mg/Al-LDO was more efficient than Mg/Al-LDH, well in agreement with many other studies of anionic dyes adsorption [7,[23][24][25]. In this study, the maximum adsorbed amount of OII on Mg/Al-LDO and Mg/Al-LDH could respectively reach 1066.0 and 475.0 mg/g, which were higher than that on most carbon materials with large specific surface area (842-1488 m 2 /g) as reported in literatures [26,27]. As is well known, carbonate has a higher affinity to the positive layers of Mg/Al-LDH than many other anions.…”

Removal of azo dye by a highly graphitized and heteroatom doped carbon derived from fish waste: Adsorption equilibrium and kinetics

“…It is clear that high removal rate of AO7 (higher than 99%) was achieved with optimized range of initial AO7 concentration of 66e181 mg/L and contact time of 7e15 min. By comparing, the AO7 adsorption capacity onto FWPC is higher than those onto reported adsorbents in the literature (Aber et al, 2007;Elizalde-Gonz alez and Hern andez-Montoya, 2009;Hamzeh et al, 2012;Hsiu-Mei et al, 2009;Silva et al, 2004aSilva et al, , 2004bPadmesh et al, 2005). In addition, it is worth noting that the optimal contact time of AO7 adsorption onto FWPC in the present study is far shorter than that of other adsorbents (Aber et al, 2007;Elizalde-Gonz alez and Hern andez-Montoya, 2009;Hamzeh et al, 2012;Hsiu-Mei et al, 2009;Silva et al, 2004aSilva et al, , 2004bPadmesh et al, 2005), confirming that FWPC is very efficient for AO7 removal from aqueous solution.…”

“…where C e (mg/L) is the equilibrium concentration in the solution, q e (mg/g) is the AO7 adsorbed at equilibrium, b (mg/g) is the Hamzeh et al, 2012;Hsiu-Mei et al, 2009;Silva et al, 2004aSilva et al, , 2004bPadmesh et al, 2005).…”

Characteristics of azo-dye onto surfactant modified chromium contained leather waste

“…Orange II azo dye has been chosen as it is inexpensive and widely used for variety of materials of nylon, silk, wool, leather. Table (1) regroups the results obtained in some recent works where the adsorption of orange ӀӀ on to various adsorbent has been studied [12][13][14][15][16][17][18] . In recent years extensive research has been going on in the field of surfactant based separation process such as a micellar chromatograph, micellar enhanced ultrafiltration [19] and surfactant modification adsorbents.…”