Synthesis and Characterization of Modified Nano-Bentonite for Removal of Heavy Metal Ions (Lead and Arsenic) from Aqueous Solution

In this paper, the removal of heavy metals, arsenic and lead by modified nano-bentonite (coated with chitosanand carboxymethyl chitosan) has been studied. First, the removal of heavy metals, arsenic and lead, under the conditionsfixed by NanoBentonite-Chitosan (NBC) and NanoBentonite-Carboxymethyl Chitosan (NBCMC) were compared andthe optimal of nano-adsorbent was selected. Following, morphology and properties of the optimal nano-adsorbent havebeen studied using XRD, SEM and TEM. Finally, it can be seen that NanoBentonite-Chitosan (NBC) was found to bemore effective for the removal of Pb (II) and As (III). Characterization of NBC indicates chitosan precipitated on thesurface of nanobentonite were identified.

کلیدواژه ها:

Removal ، Heavy Metal ، Modified Nano-Bentonite ، Chitosan ، Carboxymethyl Chitosan