Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1695383 | Applied Clay Science | 2011 | 7 Pages |
The objective of this work focused on preparing and characterizing bentonite clay through thermal treatment in order to be applied in a porous bed for copper adsorption. Tests to obtain adsorbent physical and chemical characteristics were performed on natural clay samples, samples calcined at 400 and 500 °C, and calcined submitted to copper adsorption. This clay was characterized according to the following techniques: X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), ethylene glycol monoethyl ether (EGME) method, N2 physisorption (BET), helium pycnometry, mercury porosity, scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDX). A study was conducted to define the operation outflow, based on the minimum mass transfer zone (MTZ) obtained, useful (qU) and total (qT) adsorbed amounts, and total copper removal percentage (R (%)).
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Thermally modified Bentonite clay was applied in a porous bed in copper adsorption. ► Clay was separated at different granulometry and treated in muffle at 400 and 500 °C. ► Structural changes enable the use of clay in porous bed without expansion. ► Smaller particle size and higher calcination temperature clay has greater adsorption.