Aggregation and adsorption of reactive dyes in the presence of an anionic surfactant on mesoporous aminopropyl silica

Fe2O3–palygorskite nanoparticles, efficient adsorbates for pesticide removal

“…ΔG less negative values at higher temperatures imply higher driving forces of adsorption at low than at high temperature. The more negative values of ΔG for Fe 2 O 3 Pal are an indication that fenarimol adsorption is more favorable in this sample (Cestari et al, 2007). It may be deduced from the negative values of the enthalpy (ΔH) for the three materials that the adsorption process is exothermic in nature (Memon et al, 2008) supported by the fact that fenarimol adsorption decreased with increasing temperature.…”

Review of the use of mesoporous silicas for removing dye from textile wastewater

“…a variety of surface functionalized mesoporous silicas have been used for adsorbing varies dyes (Table 2). For example, the adsorption of cationic dye by chitosan-functionalized MPS is 0.012 mmol/g and that of anionic dye by amino-functionalized MPS 0.6-1.96 mmol/g (Cestari et al 2007;Zu-bieta et al 2008;Cestari et al 2009). MPSs functionalized with carboxylic and amino groups have been fabricated for capturing basic and acidic dyes, respectively, are very efficient (good selectivity, large capacity and extremely rapid adsorption rate) because of the designed strong electrostatic interactions and their high surface areas (Ho et al 2003;Anbia and Salehi 2012;Santos et al 2013).…”

Removal of basic dye by modified Unye bentonite, Turkey

“…The equilibrium data were also applied to the Dubinin-Radushkevich (D-R) isotherm model to determine if adsorption occurred by physical or chemical processes. The linearized form of the D-R isotherm [26][27][28] is as follows:…”