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Highly efficient removal of anionic dyes from water by cationic polymer brush-functionalized magnetic mesoporous silica nanoparticles
Parashuram Mishra
Methyl orange (MO) and bromothymol from contaminated water using magnetic mesoporous nanoparticles coatedwith a cationic polymer brush (poly(2-methacryloyloxy)ethyl]trimethylammonium chloride solution) (Fe3O4- MSNs-PMETAC). Efficient removal of blue (BT) dyes Atom transfer radical polymerization (ATRP) was used to grow polymer chains on magnetic mesoporous silica nanoparticles. Chemical surface modification was confirmed by IR, TGA, SEM and TEM. The results show that the obtained Fe3O4-MSNs-PMETAC material had a nearly spherical shape with a magnetic core of about 30 nm and a silica shell thickness ranging from 135 to 250 nm. The adsorption performance of the materials was found to be unaffected by the pH of the medium (3–9) with 100% removal efficiency for both dyes. The adsorption of BT and MO on the surface of Fe3O4-MSNs-PMETAC was found to follow the Freundlich and Langmuir models, respectively. The synthesized Nano composite materials exhibit enhanced properties such as large maximum adsorption capacity, rapid synthesis process, and easy separation from solution, thus avoiding potentially toxic anionic elements (arsenate and chromate) etc. can be effective sorbents for the removal of other contaminants from water and wastewater [1,2].