Journal of Nanomedicine & Nanotechnology

Capacitive de-ionization with graphene-based electrodes for lead removal

7^th International Conference on MATERIALS SCIENCE AND NANOTECHNOLOGY

December 05-06, 2022 | Dubai, UAE

Anissa Auoni and H Hafiane

Centre for Water Research and Technologies, Tunisia

Scientific Tracks Abstracts: J Nanomed Nanotechnol

Abstract:

In this study, preparation of a carbon-based nanomaterial (rGO) obtained in two steps from powdered graphite was successful: preparation of graphene oxide (GO) by Hummers method and then with chemical reduction, two reduced grapheme oxide (rGO) were obtained using two different reductants (ascorbic acid (rGOA) and hydrazine (rGOH)). In this work, several parameters were optimized (the choice of the reductor (ascorbic acid and hydrazine), the amount of added rGO, synthesized films based on rGO) to show the feasibility of capacitive deionisation (CDI) process for treating synthetic metallic solution of Pb(NO3)2. The synthesized materials showed a porous structure with specific surface area equal to 17.85 m2/g for rGOA and 17.79 m2/g for rGOH and a microporosity of 13.02 m2/g for rGOA and 11.90 for rGOH. The conductivities of rGOA and rGOH are equal to 1401.47 S/m and 1231.53 S/m, respectively. The electrochemical characteristics obtained from rGOA and rGOH based electrodes by CV indicate specific capacitances of 117.64 F/g and 111.11 F/g at a scan rate of 10 mV/s. Using CVs, It was shown that the best amount is 50 mg for rGOA and 10 mg for rGOH, respectively. The CDI electrosorption performance, using different electrodes based on rGOA and rGOH was evaluated. The CDI tests show a decrease in conductivity. Therefore, the heavy metal removal rates (%) of the metallic synthetic solution using Pb(NO3)2 are significant, and are equal to 73 and 57 by rGOA and rGOH, respectively. For the electrosorptive capacities of the electrodes, excellent results were obtained with lead (Pb) abatement value equal to 291.7 mg/g, by rGOA. The experimental results confirmed that the electrochemical potential of the rGO material can be further improved even by incorporating a minor amount. The resulting rGO was found to be a promising and highly effective electrode material for cost-effectiveness in CDI technology, which appears to be a high-performance electrochemical technique for heavy metal removal.
Recent Publications :
1. Anissa Aouni. Ridha Lafi Hafiane Amor Feasibility evaluation of combined electrocoagulation/adsorption process by optimizing operating parameters removal for textile wastewater treatment. ISSN Print 1944-3994, ISSN Online 1944-3986, Hybrid Open Access Journal
2. Anissa Aouni. C. Fersi Mahmoud Dhahbi Performance evaluation of direct nanofiltration process to fouling by treating rinsing-bath effluents for water reuse. Desalination and Water Treatment, 52:7-9, 1770-1785.
3. Anissa Aouni B. Cuartas-Uribe Reactive dyes rejection and textile effluent treatment study using ultrafiltration and nanofiltration processes Desalination,Volume 297, 2012, Pages 87-96,ISSN 0011-9164

Biography :

Anissa Aouni currently working as a Centre de Recherche et des Technologies des Eaux | CERTE, Eau, Membrane et Biotechnologie Environnementale / Water, Membrane and Environmental Biotechnology (EMBE). She has done various innovative technologies and participated in many conferences. Her research interests are nanomaterials, material science and water treatment.