الفهرس | Only 14 pages are availabe for public view |
Abstract The removal of heavy metals such as (Cd, Ni, Cr, etc.) from contaminated water/wastewater had been received great attention, because of the adverse impact on the health and the natural environment. Various techniques used for the removal of different pollutants from wastewater. However, adsorption process onto solid substrate was preferred because of its high efficiency, easy handling, and cost effectiveness. Adsorption techniques provide an attractive alternative treatment, especially if the adsorbent was inexpensive and readily available. The advantage of the adsorption process was its sludge free, clean operation, and complete removal of pollutants even from dilute solution. Therefore a comparative study was addressed for utilizing low-cost natural resource (Bentonitic rock) in the preparation of different forms of synthetic zeolites batches, using two different routes; microwave (M-H) and Conventional (C-H) hydrothermal heating. The evaluation of both M-Zb (microwave) and C-Zb (Conventional) zeolitic products were evaluated for the efficient removal of four metal ions Cr(III), Cd(II), Pb(II) and Ni(II) from wastewater via the adsorption method. Zeolite mixture phases and morphologies were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and EDS elemental analyses. Kinetic and adsorption isotherm models had been inspected in the evaluation of the effluent elimination. Although the lab results at metal concentration of 100.09 mg/L, pH 6.5 and 2g/L zeolite dose implied the effective use of both synthetic products, the microwave mix (M-Zb) indicated more efficient iv removal of metal ions from the wastewater than that recorded for the C-Zb materia |