Physical and chemical regeneration of zeolitic adsorbents for dye removal in wastewater treatment

Adsorption of methylene blue and orange II onto unmodified and surfactant-modified zeolite

“…As shown in the figures, the adsorbed MB increased with increasing initial solution pH and reached its maximum (about 6.1 mg/g) on unmodified zeolite at pH 6-9. This is comparable to other investigations [4,16,[22][23][24]. It is probably because at lower pH the presence of H + ions will compete with cationic MB for adsorption sites.…”

“…framework structure bearing AlO 4 and SiO 4 tetrahedra that are linked to each other by sharing all of their oxygens to form interconnected cages and channels containing mobile water molecules and alkalis and/or alkaline earths [11,12]. Zeolite is a good adsorbent for heavy metal ions from wastewater [13][14][15] and for organic dyes [5,[16][17][18]. However, there has been little study of dye removal by organic-surfactant-modified zeolites [19].…”

Removal of Ametryn From Aqueous Solutions With Zeolite Nanoparticles Optimized Using the Box-Behnken Design

“…A variety of methods have been reported for adsorption including activated carbon, clay minerals, biomaterials, zeolites, chitosan and others (6). Although activated carbon is widely used as an adsorbent yet it is relatively expensive (7).…”

“…Physicochemical properties of zeolites including adsorption, ion exchange, molecular sieving and catalysis of different zeolites have made it an important sorbent for extracting and removal of hazardous compounds from air and water (6,8). Zeolites have hydrated aluminosilicate structure as TO 4 tetrahedral molecules.…”

Preparation and characterization of poly(acryl amide-coacrylic acid)/nay and Clinoptilolite nanocomposites with improved methylene blue dye removal behavior from aqueous solution

“…Adsorption study has attracted considerable interest as a feasible procedure for removing dyes from effluents. Literature review show different methods and various adsorbents such as activated carbon [3], tea waste [4], clay [5], zeolite [6], MCM-22 [7], waste wood [8], biomaterials [9], polymer [10] and composite membrane [11] have been developed for dye removal.…”