SBA-15 functionalised with high loading of amino or carboxylate groups as selective adsorbent for enhanced removal of toxic dyes from aqueous solution

Abstract

Amino- or carboxylate-functionalised SBA-15 acts as a selective adsorbent and shows enhanced adsorption capacity for toxic dyes.

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

“…The adsorption experiments at varying temperatures (303, 308, and 313 K) were carried out to estimate the influence of temperature on dyes uptake ( Figure 10). Although these temperatures are very close, but many adsorption studies at close temperature intervals have been reported which provide satisfactory results of thermodynamic parameters [51][52][53][54]. Percent removal of MV increased from 91.92 to 92.52, while that for MG from 93.66 to 94.60 suggesting that adsorption was more favored at higher temperature.…”

The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2

“…Furthermore, the amount of functional groups graed on the SBA-15 surface was conrmed by elemental analysis. 30,35 The chemical and physical properties of the SBA-15 samples are presented in Table 1. 3.2 Adsorption study 3.2.1 Effect of the initial pH. The effects of initial pH on the dye adsorption by SBA-15-BOP were studied in 50 mL polyethylene tubes containing 30 mL of 200 mg L À1 CR dye or 100 mg L À1 RR2 dye solutions with 10 mg of adsorbent at 25 C for 60 min by varying the initial pH of the solution from 3.0 to 9.0 (Fig.…”

“…[27][28][29][30] For instance, many reports related to the application of SBA-15 in the recovery of uranium(VI) [29][30][31][32] are available; moreover, the functionalized SBA-15 materials have also been found to efficiently remove various dyes such as methyl orange, reactive blue, methylene blue and acid blue, 27,28 while there are some limitations to their application. [23][24][25][26][27][28][29][30][31][32][33][34][35] Phosphonic-based ligands form the most important ligand family, which have numerous interesting chemical structures such as phosphates, phosphonates or organophosphorus derivatives. [36][37][38] These ligands exhibit remarkable coordination abilities and high chemical resistance.…”

Removal of Acid Blue 92 by Using Amino‐Functionalized Silica‐Pillared Clay as a New Nano‐Adsorbent: Equilibrium, Kinetic and Thermodynamic Parameters

“…[33] Both kinds of polyelectrolytes can be utilized in water and wastewater treatment. According to studies, it seems that many chemical molecules, such as amino, [34] poly diallyldimethylammonium chloride, [35] chitosan, and pyridine [36] can provide useful functional groups to adsorbed dye contaminates. As a reported adsorbent, chitosan (CTS) is extensively applied for removing environmental pollutants.…”