Preparation Nature Nano-Bentonite as Adsorbent Heavy Metal Cd and Hg

Abstract

The results of natural bentonite from South Tapanuli (Pahae) were synthesized by coprecipitation method using HCL solvent into nano-bentonite.The nano-bentonite is characterized by X-Ray Diffraction, Scanning Electron Microscope-Energy Dispertion, and Surface Area Analyzer. Nano-bentonite applications as metal adsorbents were characterized by Atomic Adsorption Spectrofotometric. Characterization results from X-Ray Diffraction showed that the diameter size of crystalline nano-bentonite of HCL solvent, 19.17 nm with crystalline structure form was hexagonal. From the results of the characterization obtained a single phase, SiO 2 with the field d hkl highest at millier index (011) with 2θis 26,58°. The results of the Scanning Electron Microscope-Energy Dispertion characterization of nano-bentonite showed that there was a reduction in agglomeration and finer nano-bentonite surfaces. The results of the Surface Area Analyzer show the S BET nano-bentonite is 608,6 m 2 /g. Results of analysis of Atomic Adsorption Test Spectrofotometric showed that the absorption of metal content using nano-bentonite with adsorption power of 99,03% for Cd and 99,18% for Hg.