Abstract
In this work, a novel low-cost adsorbent MgO porous nanoplates modified pumice (MgO@Pumice) was developed through a facile wet chemistry method. Characterization studies were performed using XRD, SEM, TEM and EDS analysis. The results indicate that the pumice is capsuled by huge number of huge number of MgO porous nanoplates. The individual MgO porous nanoplates is about several tens of micrometers in width and 50 nm in thickness. The loading amount of the MgO porous nanoplates can be conveniently adjust by control the growth cycles, and the loading amount of the MgO porous nanoplates on pumice would reaches 2.14 g/g. The fluoride adsorption performances of the MgO@Pumice samples were investigated. With the increase of growth cycles, the fluoride adsorption performances of the MgO@pumice samples steady increase. The MgO@pumice-6 exhibits the best fluoride adsorption property, and the adsorption capacity is larger than 37.9 mg/g at neutral. The absorbent also showed high fluoride removal ability in a wide pH range of 2–10. The adsorption mechanism also has been studied. The column test indicates that 324 bed volumes can be treated with the effluent under 1.0 mg/L. It is believed that the low-cost MgO@Pumice adsorbent can be used in a packed bed for the removal of fluoride from drinking water.
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