Adsorption and electrosorption of mercury(II) acetate onto activated charcoal cloth from aqueous solution

✍ Scribed by G.G. Jayson; J.A. Sangster; G. Thompson; M.C. Wilkinson

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 949 KB
• Volume: 25
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(87)90193-x

✦ Synopsis

The adsorption of mercury(I1) acetate from aqueous solution onto an activated charcoal cloth (ACC) has been studied using shaking and flow-through techniques. It was found that the adsorption capacities of the ACC shaken in mercury(I1) acetate solution could reach 2 x 10e3 mol g-' at pH 5.5. The flow-through experiments gave lower adsorption results because of a decreased concentration gradient and limitations due to film diffusion. The latter could be overcome by increasing the flow-rate. Application of an electrical potential to the ACC during flow-through experiments, increased the uptake of mercury(I1). This was most marked when the applied polarity was negative, -1 volt, with respect to a Calomel reference electrode. Then the diffusion coefficient reached a constant value and the cloth continued to remove mercury(I1) out of the solutions passing through it.